HCTL-2001-A00, HCTL-2017-A00 / PLC,
HCTL-2021-A00 / PLC
Quadrature Decoder/Counter Interface ICs
Data Sheet
Features
•Interfaces Encoder to Microprocessor
•14 MHz Clock Operation
•High Noise Immunity:
•Schmitt Trigger Inputs and Digital Noise Filter
•16-Bit Binary Up/Down Counter
•Latched Outputs
•8-Bit Tristate Interface
•8, 12 or 16-Bit Operating Modes
•Quadrature Decoder Output Signals, Up/Down and
Count
•Cascade Output Signals, Up/Down and Count
•Substantially Reduced System Software
•5V Operation (VDD – VSS)
•TTL/CMOS Compatible I/O
•Operating Temperature: -40°C to 85°C
•16-Pin PDIP, 20-Pin PDIP, 20-Pin PLCC
Applications
•Interface Quadrature Incremental Encoders to
Microprocessors
•Interface Digital Potentiometers to Digital Data
Input Buses
Description
The HCTL-2xx1(7)-A00/PLC is CMOS ICs that performs
the quadrature decoder, counter, and bus interface
function. The HCTL-2xx1(7)-A00/PLC is designed to
improve system performance in digital closed loop
motion control systems and digital data input systems.
It does this by shifting time intensive quadrature
decoder functions to a cost effective hardware solution.
The HCTL-2xx1(7)-A00/PLC consists of a quadrature
decoder logic, a binary up/down state counter, and an
8-bit bus interface. The use of Schmitt-triggered CMOS
inputs and input noise filters allows reliable operation
in noisy environments. The HCTL-2001-A00 contains
12-bit counter and HCTL-2017-A00/PLC or HCTL-2021-
A00/PLC contains 16-bit counter and provides TLL/
CMOS compatible tri-state output buffers. Operation
is specified for a temperature range from –40 to +85°C
at clock frequencies up to 14MHz.
The HCTL-2021-A00/PLC provides quadrature decoder
output signals and cascade signals for use with many
standard computer ICs.
Part Number Description Pinout Package
HCTL-2001-A00 14 MHz clock operation. 12-bit counter. PINOUT A PACKAGE A
HCTL-2017-A00 14 MHz clock operation. 16-bit counter. PINOUT A PACKAGE A
HCTL-2017-PLC 14 MHz clock operation. 16-bit counter. PINOUT C PACKAGE C
HCTL-2021-A00 14 MHz clock operation. 16-bit counter.
Quadrature decoder output signals. Cascade output signals.
PINOUT B PACKAGE B
HCTL-2021-PLC 14 MHz clock operation. 16-bit counter.
Quadrature decoder output signals. Cascade output signals.
PINOUT D PACKAGE C
2
Devices
Package Dimensions
(dimension in mm)
See Appendix A.
PINOUT A PINOUT B
PINOUT C PINOUT D
D0
CLK
SEL
OE
RST
CH B
CH A
VSS
VDD
D1
D2
D3
D4
D5
D6
D7
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
VDD
D1
D2
D3
CNTdec
CNTcas
D4
D5
D6
D7
D0
CLK
SEL
OE
U/D
NC
RST
CH B
CH A
VSS
14
15
13
12
11
165
17
18
19
6
7
8
9
10
4
2
3
201
3
Operating Characteristics
Table 1. Absolute Maximum Ratings
(All voltages below are referenced to VSS)
Table 2. Recommended Operating Conditions
Table 3. DC Characteristics VDD = 5V ± 5%; TA = -40 to 85°C
Notes:
1. Free Air
2. In general, for any VDD between the allowable limits (+4.5V to +5.5V), VIL = 0.3VDD and VIH = 0.7VDD; typical values are VOH = VDD – 0.5V
and VOL = VSS + 0.2V
3. Including package capacitance
Parameter Symbol Limits Units
DC Supply Voltage VDD -0.3 to +6.0 V
Input Voltage VIN -0.3 to (VDD +0.3) V
Storage Temperature TS-55 to +150 C
Operating Temperature [1] TA-40 to +85 C
Parameter Symbol Limits Units
DC Supply Voltage VDD 4.5 to 5.5 V
Ambient Temperature [1] TA-40 to +85 C
Symbol Parameter Condition Min Typ Max Unit
VIL [2] Low-Level Input Voltage 1.5 V
VIH [2] High-Level Input Voltage 3.5 V
VT+ Schmitt-Trigger Positive-Going Threshold 3.5 4.0 V
VT- Schmitt-Trigger Negative-Going Threshold 1.0 1.5 V
VH Schmitt-Trigger Hysteresis 1.0 2.0 V
IIN Input Current VIN=VSS or VDD -10 1 +10 µA
VOH [2] High-Level Output Voltage IOH = -3.75 mA 2.4 4.5 V
VOL [2] Low-Level Output Voltage IOL = +3.75mA 0.2 0.4 V
IOZ High-Z Output Leakage Current VO=VSS or VDD -10 1 +10 µA
IDD Quiescent Supply Current VIN=Vss or VDD 1 100 µA
CIN [3] Input Capacitance Any Input 5 pF
COUT [3] Output Capacitance Any Output 5 pF
4
Functional Pin Description
Table 4a. Functional Pin Descriptions (PDIP Package)
Symbol Pin Description
HCTL-
2001-
A00
HCTL-
2017-
A00
HCTL-
2021-
A00
VDD 16 16 20 Power Supply
VSS 8 8 10 Ground
CLK 2 2 2 CLK is a Schmitt-trigger input for the external clock signal.
CHA
CHB
7 6 7 6 9 8 CHA and CHB are Schmitt-trigger inputs that accept the outputs from a
quadrature-encoded source, such as incremental optical shaft encoder. Two
channels, A and B, nominally 90 degrees out of phase, are required.
RST 5 5 7 This active low Schmitt-trigger input clears the internal position counter and
the position latch. It also resets the inhibit logic. RST is asynchronous with
respect to any other input signals.
OE 4 4 4 This CMOS active low input enables the tri-state output buffers. The OE/
and SEL inputs are sampled by the internal inhibit logic on the falling edge
of the clock to control the loading of the internal position data latch.
SEL 3 3 3 These CMOS inputs directly controls which data byte from the position latch
is enabled into the 8-bit tri-state output buffer. As in OE/ above, SEL also
control the internal inhibit logic.
CNTDCDR NA NA 16 A pulse is presented on this LSTTL-compatible output when the quadrature
decoder has detected a state transition. CNT
U/D NA NA 5 This LSTTL-compatible output allows the user to determine whether the IC
is counting up or down and is intended to be used with the CNTDCDR and
CNTCAS outputs. The proper signal U (high level) or D/ (low level) will be
present before the rising edge of the CNTDCDR and CNTCAS outputs.
CNTCAS NA NA 15 A pulse is presented on this LSTTL-compatible output when the HCTL-2021-
A00 internal counter overflows or underflows. The rising edge on this
waveform may be used to trigger an external counter.
D0 1 1 1 These LSTTL-compatible tri-state outputs form an 8-bit output ports through
which the contents of the 16-bit position latch may be read in 2 sequential
bytes. The High byte is read first followed by the Low bytes.
D1 15 15 19
D2 14 14 18
D3 13 13 17
D4 12 12 14
D5 11 11 13
D6 10 10 12
D7 9 9 11
NC NA NA 6 Not connected - this pin should be left floating.
SEL BYTE SELECTED
0High
1Low
5
Table 4b. Functional Pin Descriptions (PLCC Package)
Symbol Pin Description
HCTL
2017-PLC
HCTL
2021-PLC
VDD 20 20 Power Supply
VSS 10 10 Ground
CLK 2 2 CLK is a Schmitt-trigger input for the external clock signal.
CHA
CHB
9
8
9
8
CHA and CHB are Schmitt-trigger inputs that accept the outputs from a
quadrature-encoded source, such as incremental optical shaft encoder. Two
channels, A and B, nominally 90 degrees out of phase, are required.
RST 7 7 This active low Schmitt-trigger input clears the internal position counter and the
position latch. It also resets the inhibit logic. RST is asynchronous with respect
to any other input signals.
OE 4 4 This CMOS active low input enables the tri-state output buffers. The OE/ and SEL
inputs are sampled by the internal inhibit logic on the falling edge of the clock to
control the loading of the internal position data latch.
SEL 3 3 These CMOS inputs directly controls which data byte from the position latch is
enabled into the 8-bit tri-state output buffer. As in OE/ above, SEL also control
the internal inhibit logic.
CNTDCDR NA 16 A pulse is presented on this LSTTL-compatible output when the quadrature
decoder has detected a state transition.
U/D NA 5 This LSTTL-compatible output allows the user to determine whether the IC is
counting up or down and is intended to be used with the CNTDCDR and CNTCAS
outputs. The proper signal U (high level) or D/ (low level) will be present before
the rising edge of the CNTDCDR and CNTCAS outputs.
CNTCAS NA 15 A pulse is presented on this LSTTL-compatible output when the HCTL-2021-PLC
internal counter overflows or underflows. The rising edge on this waveform may
be used to trigger an external counter.
D0 1 1 These LSTTL-compatible tri-state outputs form an 8-bit output ports through which
the contents of the 16-bit position latch may be read in 2 sequential bytes. The
High byte is read first followed by the Low bytes.
D1 19 19
D2 18 18
D3 17 17
D4 14 14
D5 13 13
D6 12 12
D7 11 11
SEL BYTE SELECTED
0High
1Low
6
Figure 2: Waveforms for Positive Clock Edge Related Delays
Figure 1. Reset Waveform
Switching Characteristics
Table 5. Switching Characteristics Max/Min specifications at VDD = 5.0 ± 5%, TA = -40 to +85 OC, CL = 40 pf
Symbol Description Min. Max. Units
1 tCLK Clock Period 70 ns
2 tCHH Pulse width, clock high 28 ns
3 tCD Delay time, rising edge of clock to valid, updated count information on
D0-7
65 ns
4 tODE Delay time, OE fall to valid data 65 ns
5 tODZ Delay time, OE rise to Hi-Z state on D0-7 40 ns
6 tSDV Delay time, SEL valid to stable, selected data byte (delay to High Byte
= delay to Low Byte)
65 ns
7 tCLH Pulse width, clock low 28 ns
8 tSS Setup time, SEL before clock fall 20 ns
9 tOS Setup time, OEN before clock fall 20 ns
10 tSH Hold time, SEL after clock fall 0 ns
11 tOH Hold time, OE after clock fall 0 ns
12 tRST Pulse width, RST low 28 ns
13 tDCD Hold time, last position count stable on D0-7 after clock rise 10 ns
14 tDSD Hold time, last data byte stable after next SEL state change 10 ns
15 tDOD Hold time, data byte stable after OE rise 10 ns
16 tUDD Delay time, U/D valid after clock rise 45 ns
17 tCHD Delay time, CNTDCDR or CNTCAS high after clock rise 45 ns
18 tCLD Delay time, CNTDCDRor CNTCAS low after clock fall 45 ns
19 tUDH Hold time, U/D stable after clock rise 10 ns
20 tUDCS Setup time, U/D valid before CNTDCDR or CNTCAS rise tCLK-45 ns
21 tUDCH Hold time, U/D stable after CNTDCDR or CNTCAS rise tCLK-45 ns
7
Figure 5: Decoder, Cascade Output Timing
Figure 4: Bus Control Timing
Figure 3: Tri-State Output Timing
8
Digital Noise Filter
The digital noise filter section is responsible for
rejecting noise on the incoming quadrature signals. The
input section uses two techniques to implement
improved noise rejection. Schmitt-trigger inputs and a
three-clock-cycle delay filter combine to reject low level
noise and large, short duration noise spikes that
typically occur in motor system applications. Both
common mode and differential mode noise are
rejected. The user benefits from these techniques by
improved integrity of the data in the counter. False
counts triggered by noise are avoided.
Figure 7 shows the simplified schematic of the input
section. The signals are first passed through a Schmitt-
trigger buffer to address the problem of input signals
Figure 6. Simplified Logic Diagram
with slow rise times and low-level noise (approximately
< 1V). The cleaned up signals are then passed to a
four-bit delay filter. The signals on each channel are
sampled on rising clock edges. A time history of the
signals is stored in the four-bit shift register. Any
change on the input is tested for a stable level being
present for three consecutive rising clock edges.
Therefore, the filtered output waveforms can change
only after an input level has the same value for three
consecutive rising clock edges.
Refer to Figure 8, which shows the timing diagram.
The result of this circuitry is that short noise spikes
between rising clock edges are ignored and pulses
shorter than two clock periods are rejected.
9
Figure 7. Simplified Digital Noise Filter Logic
Figure 8. Signal Propagation through Digital Noise Filter
CHA
CHA
filtered
DQ DQ DQ DQ
CK
CK
J
K
Q
CHB
CHB
filtered
DQ DQ DQ DQ
CK
CK
J
K
Q
CLK
CHA
CHB
CHA
filtered
CHB
filtered
CHI
filtered
tEtEtES tES tES tES
tEtE
3 t CLK
Noise Spike
10
Design Considerations
The designer should be aware that the operation of
the digital filter places a timing constraint on the
relationship between incoming quadrature signals and
the external clock. Figure 8 shows the timing waveform
with an incremental encoder input. Since an input has
to be stable for three rising clock edges, the encoder
pulse width (tE - low or high) has to be greater than
three clock periods (3tCLK). This guarantees that the
asynchronous input will be stable during three
consecutive rising clock edges. A realistic design also
has to take into account finite rise time of the
waveforms, asymmetry of the waveforms, and noise.
In the presence of large amounts of noise, tE should be
much greater than 3tCLK— to allow for the interruption
of the consecutive level sampling by the three-bit delay
filter. It should be noted that a change on the inputs
that is qualified by the filter will internally propagate
in a maximum of seven clock periods.
The quadrature decoder circuitry imposes a second
timing constraint between the external clock and the
input signals. There must be at least one clock period
between consecutive quadrature states. As shown in
Figure 8, a quadrature state is defined by consecutive
edges on both channels. Therefore, tES (encoder state
period) > tCLK-. The designer must account for
deviations from the nominal 90 degree phasing of input
signals to guarantee that tES > tCLK.
Position Counter
This section consists of a 16-bit binary up/down
counter which counts on rising clock edges as
explained in the Quadrature Decoder Section. All 16-
bit of data are passed to the position data latch. The
system can use this count data in several ways:
A. System total range is £ 16 bits, so the count
represents “absolute” position.
B. The system is cyclic with £ 16 bits of count per
cycle. RSTN (or CHI) is used to reset the counter
every cycle and the system uses the data to
interpolate within the cycle.
C. System count is > 8 or 16 bits, so the count data is
used as a relative or incremental position input for
a system software computation of absolute
position. In this case counter rollover occurs. In
order to prevent loss of position information, the
processor must read the outputs of the IC before
the count increments one-half of the maximum
count capability. Two’s-complement arithmetic is
normally used to compute position from these
periodic position updates.
D. The system count is >16 bits so the HCTL-2021-
A00/PLC can be cascaded with other standard
counter ICs to give absolute position.
Figure 9. 4x Decoder Mode
Quadrature Decoder
The quadrature decoder decodes the incoming filtered
signals into count information. This circuitry multiplies
the resolution of the input signals by a factor of four
(4X decoding).
The quadrature decoder samples the outputs of the
CHA and CHB filters. Based on the past binary state of
the two signals and the present state, it outputs a count
signal and a direction signal to the integral position
counter.
Figure 9 shows the quadrature states of Channel A and
Channel B signals. The 4x decoder will output a count
signal for every state transition (count up and count
down). Figure 9 shows the valid state transitions for 4x
decoder. The 4x decoder will output a count signal at
respective state transition, depending on the counting
direction. Channel A leading channel B results in
counting up. Channel B leading channel A results in
counting down. Illegal state transitions, caused by
faulty encoders or noise severe enough to pass through
the filter, will produce an erroneous count.
CHA CHB STATE
4X Decoder
(Count Up &
Count Down)
101Pulse
112Pulse
013Pulse
004Pulse
123 4
clk
state
chA
chB
Tes
Te
Telp
1
2
3
4
Valid State
Transitions
count up
count
down
11
Position Data Latch
The position data latch is a 16-bit latch which captures
the position counter output data on each rising clock
edge, except when its inputs are disabled by the inhibit
logic section during two-byte read operations. The
output data is passed to the bus interface section.
When active, a signal from the inhibit logic section
prevents new data from being captured by the latch,
keeping the data stable while successive reads are
made through the bus section. The latch is
automatically re-enabled at the end of these reads. The
latch is cleared to 0 asynchronously by the RST signal.
Inhibit Logic
The Inhibit Logic Section samples the OE and SEL
signals on the falling edge of the clock and, in response
to certain conditions (see Figure 10), inhibits the
position data latch. The RST signal asynchronously
clears the inhibit logic, enabling the latch.
Bus Interface
The bus interface section consists of a 16 to 8 line
multiplexer and an 8-bit, three-state output buffer. The
multiplexer allows independent access to the low and
high bytes of the position data latch. The SEL and OE
signals determine which byte is output and whether
or not the output bus is in the high-Z state.
Figure 10. Two Bytes Read Sequence
Figure 11. Simplified Inhibit Logic
Step SEL OE CLK Inhibit Signal Action
1 L L Falling 1 Set inhibit; read high byte
2 H L Falling 1 Read low byte; starts reset
3 X H Falling 0 Complete inhibit logic reset
Quadrature Decoder Output
The quadrature decoder output section consists of
count and up/down outputs derived from the 4x
decoder mode of the HCTL-2021-A00/PLC. When the
decoder has detected a count, a pulse, one-half clock
cycle long, will be output on the CNTDCDR pin. This
output will occur during the clock cycle in which the
internal counter is updated. The U/D pin will be set to
the proper voltage level one clock cycle before the
rising edge of the CNTDCDR pulse, and held one clock
cycle after the rising edge of the CNTDCDR pulse. These
outputs are not affected by the inhibit logic.
Cascade Output (HCTL-2021-A00/PLC only!)
The cascade output also consists of count and up/down
outputs. When the HCTL-2021-A00/PLC internal
counter overflows or underflows, a pulse, one-half clock
cycle long, will be output on the CNTCAS pin. This
output will occur during the clock cycle in which the
internal counter is updated. The U/D pin will be set to
the proper voltage level one clock cycle before the
rising edge of the CNTCAS pulse, and held one clock
cycle after the rising edge of the CNTCAS pulse. These
outputs are not affected by the inhibit logic.
12
Figure 12. Decode and Cascade Output Diagram (4x)
Cascade Considerations (HCTL-2021-A00/PLC only!)
The HCTL-2021-A00/PLC cascading system allows for
position reads of more than two bytes. These reads
can be accomplished by latching all the bytes and then
reading the bytes sequentially over the 8-bit bus. It is
assumed here that, externally, a counter followed by a
latch is used to count any count that exceeds 16 bits.
This configuration is compatible with the HCTL-2021-
A00/PLC internal counter/latch combination.
Consider the sequence of events for a read cycle that
starts as the HCTL-2021-A00/PLC internal counter rolls
over. On the rising clock edge, count data is updated
in the internal counter, rolling it over. A count-cascade
pulse (CNTCAS) will be generated with some delay after
the rising clock edge (tCHD). There will be additional
propagation delays through the external counters and
registers. Meanwhile, with SEL and OE low to start the
read, the internal latches are inhibited at the falling
edge and do not update again till the inhibit is reset.
If the CNTCAS pulse now toggles the external counter
and this count gets latched a major count error will
occur. The count error is because the external latches
get updated when the internal latch is inhibited.
Valid data can be ensured by latching the external
counter data when the high byte read is started (SEL
and OE low). This latched external byte corresponds
to the count in the inhibited internal latch. The cascade
pulse that occurs during the clock cycle when the read
begins gets counted by the external counter and is
not lost.
For example, suppose the HCTL-2021-A00/PLC count
is at FFFFh and an external counter is at F0h, with the
count going up. A count occurring in the HCTL-2021-
A00/PLC will cause the counter to roll over and a
cascade pulse will be generated. A read starting on
this clock cycle will show FFFFh from the HCTL-2021-
A00/PLC. The external latch should read F0h, but if the
host latches the count after the cascade signal
propagates through, the external latch will read F1h.
13
General Interfacing
The 16-bit latch and inhibit logic allows access to 16
bits of count with an 8-bit bus. When only 8-bits of
count are required, a simple 8-bit (1-byte) mode is
available by holding SEL high continuously. This
disables the inhibit logic. OE provides control of the
tri-state bus, and read timing is shown in Figure 2 and
3.
For proper operation of the inhibit logic during a two-
byte read, OE and SEL must be synchronous with CLK
due to the falling edge sampling of OE and SEL.
The internal inhibit logic on the HCTL-2021-A00/PLC
inhibits the transfer of data from the counter to the
position data latch during the time that the latch
outputs are being read. The inhibit logic allows the
microprocessor / microcontroller to first read the high
order 4 or 8 bits from the latch and then read the low
order 8 bits from the latch. Meanwhile, the counter
can continue to keep track of the quadrature states
from the CHA and CHB input signals.
Figure 11 shows the simplified inhibit logic circuit. The
operation of the circuitry is illustrated in the read timing
shown in Figure 13.
Actions
1. On the rising edge of the clock, counter data is
transferred to the position data latch, provided the
inhibit signal is low.
2. When OE goes low, the outputs of the multiplexer
are enabled onto the data lines. If SEL is low, then
the high order data bytes are enabled onto the
data lines. If SEL is high, then the low order data
bytes are enabled onto the data lines.
3. When the IC detects a low on OE and SEL during a
falling clock edge, the internal inhibit signal is
activated. This blocks new data from being
transferred from the counter to the position data
latch.
4. When SEL goes high, the data outputs change from
the high byte to the low byte.
5. The first of two reset conditions for the inhibit logic
is met when the IC detects a logic high on SEL and
a logic low on OE during a falling clock edge.
6. When OE goes high, the data lines change to a high
impedance state.
7. The IC detects a logic high on OE during a falling
clock edge. This satisfies the second reset condition
for the inhibit logic.
Figure 13. Typical Interface Timing
14
APPENDIX A
PACKAGE A
SYMBOL
e
E1
E
D
C1
C
B2
B
A2
A1
A-
NOM.MIN.
-0.015 0.1300.115 -0.014
0.6000.550 -0.008
0.008 0.7500.740
0.295
0.240
B1 0.014 0.018
L -0.125
MAX.
.175
-
0.195
0.022
0.020
0.650
0.014
0.012
0.760
0.260
0.150
0.010
0.100 BSC.
-
0.310 0.325
0.250
A
A
SECTION A-A
6-16˚
E
0-10˚
L
C
PIN #1
PIN 1
IDENT.
MOLD ONLY
E1
FOR CONVENTIONAL
PIN INDENTION SHOWN
OPTIONAL EJECTOR
BASE PLANE
SEATING PLANE
B2
D
L
A1
A
A2
B
B
C
C
e
ALL DIMENSIONS ARE IN INCHES
15
PACKAGE B
SYMBOL
e
E1
E
D
C1
C
B2
B
A2
A1
A-
NOM.MIN.
-0.015 0.1300.115 -0.014
0.6000.550 -0.008
0.008 1.0301.010
0.295
0.240
B1 0.014 0.018
L -0.125
MAX.
.175
-
0.195
0.022
0.020
0.650
0.014
0.012
1.035
0.260
0.150
0.010
0.100 BSC.
-
0.310 0.325
0.250
A
A
SECTION A-A
6-16˚
E
0-10˚
L
C
PIN #1 PIN 1
IDENT.
MOLD ONLY
E1
FOR CONVENTIONAL
PIN INDENTION SHOWN
OPTIONAL EJECTOR
BASE PLANE
SEATING PLANE
B2
D
L
A1
A
A2
B
B
C
C
e
ALL DIMENSIONS ARE IN INCHES
For product information and a complete list of distributors, please go to our web site: www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved.
AV01-0041EN - February 27, 2006
PACKAGE C
A
D2/E2
e
B
B1
SEATING PLANE
R .045/.025
A1
E
E1
PIN 1
IDENTIFIER & ZONE
.042/.056
2 PLCS
D
D1
D2/E2
0.013 0.021
0.1560.1520.146
0.1200.1050.090
B
E2
e
E1
E
D1
D
C
0.050 REF.
0.145 0.160 0.165
0.008 0.010
0.017
0.012
SYMBOL
A
A2
A1
0.172
MIN
0.165
NOM
0.180
MAX
0.026
B1 0.029 0.032
D2
0.355
0.165
0.395
0.3550.352
0.390
0.160
0.3520.350
0.145
0.385
0.350
0.385 0.390 0.395
ALL DIMENSIONS ARE IN INCHES.
SIDE VIEW
TOP VIEW BOTTOM VIEW
A2
