1
IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR INDUSTRIAL TEMPERATURE RANGE
SEPTEMBER 2009INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
© 2009 Integrated Device Technology, Inc. DSC-2555/9
FEATURES:
• 0.5 MICRON CMOS Technology
• Bidirectional interface between 3.3V and 5V buses
• Control inputs can be driven from either 3.3V or 5V circuits
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
•VCC1 = 5V ±10%, VCC2 = 2.7V to 3.6V
• High drive outputs (-32mA IOH, 64mA IOL) on 5V port
• Power off disable on both ports permits “live insertion”
• Typical VOLP (Output Ground Bounce) < 0.9V at VCC1 = 5V,
VCC2 = 3.3V, TA = 25°C
• Available in SSOP and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
IDT74FCT164245T
FAST CMOS 16-BIT
BIDIRECTIONAL
3.3V TO 5V TRANSLATOR
DESCRIPTION:
The FCT164245T 16-bit 3.3V-to-5V translator is built using advanced
dual metal CMOS technology. This high-speed, low-power transceiver is
designed to interface between a 3.3V bus and a 5V bus in a mixed 3.3V/
5V supply environment. This enables system designers to interface TTL
compatible 3.3V components with 5V components. The direction and output
enable controls operate these devices as either two independent 8-bit
transceivers or one 16-bit transceiver. The A port interfaces with the 3.3V
bus; the B port interfaces with the 5V bus. The direction control (xDIR) pin
controls the direction of data flow. The output enable pin (xOE) overrides
the direction control and disables both ports. These control signals can be
driven from either 3.3V or 5V devices.
The FCT164245T is ideally suited for driving high-capacitance loads
and low-impedance backplanes. The output buffers are designed with
power off disable capability to allow "hot insertion" of boards when used as
backplane drivers. They also allow interface between a mixed supply
system and external 5 volt peripherals.
1
DIR
1
OE
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1
A
7
1
A
8
1
B
1
1
B
2
1
B
3
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
3.3V Port
5V Port
2
DIR
2
OE
2
A
1
2
A
2
2
A
3
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
B
1
2
B
2
2
B
3
2
B
4
2
B
5
2
B
6
2
B
7
2
B
8
3.3V Port
5V Port
1
47
48
2
3
5
6
46
44
43
41
40
38
37
8
9
11
12
24
36
35
33
32
30
25
29
27
26
22
23
13
14
16
17
19
20
2
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR
PIN CONFIGURATION
Symbol Description Max Unit
VTERM(2) Terminal Voltage with Respect to GND –0.5 to +7 V
VTERM(3) Terminal Voltage with Respect to GND –0.5 to Vcc1+0.5 V
TAOperating Temperature –40 to +85 °C
TBIAS Temperature Under Bias –55 to +125 °C
TSTG Storage Temperature –55 to +125 °C
PTPower Dissipation 1 W
IOUT DC Output Current –60 to +120 mA
ABSOLUTE MAXIMUM RATINGS(1)(1)
(1)(1)
(1)
NOTES:
1 . Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. All devices except Vcc2.
3. Power supply terminal Vcc2.
Symbol Parameter(1) Conditions Typ. Max. Unit
CIN Input Capacitance VIN = 0V 3.5 6 pF
CI/O I/O Capacitance VOUT = 0V 3.5 8 pF
CAPACITANCE (TA = +25°C, F = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names Description
xOE Output Enable Input (Active LOW)
xDIR Direction Control Input
xAx Side A Inputs or 3-State Outputs (3.3V Port)
xBx Side B Inputs or 3-State Outputs (5V Port)
SSOP/ TSSOP
TOP VIEW
1DIR
1B1
GND
1B3
VCC1
GND
2B2
GND
VCC1
GND
1B2
1B4
1B5
1B6
1B7
1B8
2B1
2B3
2B4
2B5
2B7
2B8
2B6
2DIR
1A1
1A2
GND
1A3
1A4
VCC2
1A5
1A6
1A7
1A8
2A1
2A2
2A3
2A4
VCC2
2A5
2A7
2A8
2A6
GND
GND
GND
2OE
1OE
39
29
30
31
32
33
34
35
36
37
38
25
26
27
28
48
47
41
42
43
44
45
46
40
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
FUNCTION TABLE(1)
Inputs
xOE xDIR Outputs
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X High Z State
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
POWER SUPPLY SEQUENCING
In the 74FCT164245T, the condition of VCC1 ≥ (VCC2 – 0.5V) must be
maintained at all times. For the range of VCC1 = (VCC2 – 0.5V) to VCC1 = (VCC2
+ 0.9V), both the A and B ports will remain in a High-Impedance state.
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IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR INDUSTRIAL TEMPERATURE RANGE
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
VIH Input HIGH Level (Input and I/O pins) Guaranteed Logic HIGH Level 2 — 5.5 V
VIL Input LOW Level (Input and I/O pins) Guaranteed Logic LOW Level –0.5 — 0.8 V
IIH Input HIGH Current (Input pins) VCC1 = Max. VI = 5.5V — — ±5
Input HIGH Current (I/O pins) VCC2 = Max. VI = VCC2 ——±15 µA
IIL Input LOW Current (Input pins) VI = GND — — ±5
Input LOW Current (I/O pins) VI = GND — — ±15
VIK Clamp Diode Voltage VCC2 = Min., IIN = –18mA — –0.7 –1.2 V
VOH Output HIGH Voltage VCC1 = VCC2 = Min. IOH = –0.1mA VCC2 –0.2 — — V
VIN = VIH or VIL
VCC2 = 3V IOH = –8mA 2 .4 3 —
VIN = VIH or VIL
VOL Output LOW Voltage VCC1 = Min. IOL = 0.1mA — — 0.2 V
VCC2 = Min. IOL = 16mA — 0 . 2 0 . 4
VIN = VIH or VIL IOL = 24mA — 0. 3 0.55
VCC = 3V IOL = 24mA — 0 .3 0. 5
VIN = VIH or VIL
IOFF Input/Output Power Off Leakage VCC1 = 0V, VCC2 = 0V, VIN or VO ≤ 4.5V — — ±100 µA
IOS Short Circuit Current(4) VCC1 = Max., VCC2 = Max., VO = GND(3) –70 –105 –150 mA
IOOutput Drive Current VCC1 = Max., VCC2 = Max., VO = 1.5V(3) –40 –60 –90 mA
VHInput Hysteresis — — 150 — mV
ICC2 Quiescent Power Supply Current VCC1 = Max. — 0.35 2 mA
ICC2H VCC2 = Max.
ICC2Z VIN = GND or VCC2
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (A PORT, 3.3V)
Following Conditions Apply Unless Otherwise Specified:
VCC1 = 5V ±10%, VCC2 = 2.7V to 3.6V, Industrial: TA = –40°C to +85°C
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC1 = 5V, VCC2 = 3.3V, +25°C ambient.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
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INDUSTRIAL TEMPERATURE RANGE
IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
VIH Input HIGH Level (Input and I/O pins) Guaranteed Logic HIGH Level 2 — 5.5 V
VIL Input LOW Level (Input and I/O pins) Guaranteed Logic LOW Level –0.5 — 0.8 V
IIH Input HIGH Current (Input pins) VCC1 = Max. VI = VCC1 ——±5
Input HIGH Current (I/O pins) VCC2 = Max. — — ±15 µA
IIL Input LOW Current (Input pins) VI = GND — — ±5
Input LOW Current (I/O pins) — — ±15
VIK Clamp Diode Voltage VCC1 = Min., IIN = –18mA — –0.7 –1.2 V
VOH Output HIGH Voltage VCC1 = Min. IOH = –3mA 2.5 3.5 — V
VCC2 = Min. IOH = –15mA 2 . 4 3 . 5 —
VIN = VIH or VIL IOH = –32mA(5) 23—
VOL Output LOW Voltage VCC1 = Min. IOL = 64mA — 0 . 2 0.55 V
VCC2 = Min.
VIN = VIH or VIL
IOFF Input/Output Power Off Leakage VCC1 = 0V, VCC2 = 0V, V IN or VO ≤ 4.5V — — ±100 µA
IOS Short Circuit Current(4) VCC1 = Max., VCC2 = Max., VO = GND(3) –80 –140 –225 mA
IOOutput Drive Current VCC1 = Max., VCC2 = Max., VO = 2.5V(3) –50 –75 –180 mA
VHInput Hysteresis — — 150 — mV
ICC2 Quiescent Power Supply Current VCC1 = Max. — 0.08 1.5 mA
ICC2H VCC2 = Max.
ICC2Z VIN = GND or VCC2
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (B PORT, 5V)
Following Conditions Apply Unless Otherwise Specified:
VCC1 = 5V ±10%, VCC2 = 2.7V to 3.6V, Industrial: TA = –40°C to +85°C
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC1 = 5V, VCC2 = 3.3V, +25°C ambient.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
5. Duration of the condition cannot exceed one second.
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IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR INDUSTRIAL TEMPERATURE RANGE
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
ΔICC Quiescent Power Supply Current VCC1 = Max., VCC2 = Max. — 12 30 µA
TTL Inputs HIGH VIN = VCC2 - 0.6V(3)
ICCD Dynamic Power Supply VCC1 = Max., VCC2 = Max. VIN = VCC2 — 75 120 µA/
Current(4) Outputs Open VIN = GND M Hz
xOE = xDIR = GND
One Input Togging
50% Duty Cycle
ICTotal Power Supply Current(6) VCC1 = Max., VCC2 = Max. VIN = VCC2 - 0.6V — 1.2 4.7 mA
Outputs Open VIN = GND
fI = 10MHz
50% Duty Cycle
xOE = xDIR = GND
One Bit Toggling
VCC1 = Max., VCC2 = Max. VIN = VCC2 - 0.6V — 3.5 8.5(5)
Outputs Open VIN = GND
fI = 2.5MHz
50% Duty Cycle
xOE = xDIR = GND
Sixteen Bits Toggling
POWER SUPPLY CHARACTERISTICS
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC1 = 5V, VCC2 = 3.3V, +25°C ambient.
3. Per TTL driven input. All other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC1 + ICC2 + ΔICC DHNT + ICCD (fCPNCP/2 + fiNi)
ICC1 = Quiescent Current (ICC1L, ICC1H and ICC1Z)
ICC2 = Quiescent Current (ICC2L, ICC2H and ICC2Z)
ΔICC = Power Supply Current for a TTL High Input
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
NCP = Number of Clock Inputs at fCP
fi = Input Frequency
Ni = Number of Inputs at fi
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INDUSTRIAL TEMPERATURE RANGE
IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR
Symbol Parameter Condition(1) Min.(2) Max. Unit
tPLH Propagation Delay CL = 50pF 1.5 5 ns
tPHL A to B RL = 500Ω
tPLH Propagation Delay 1.5 5 ns
tPHL B to A
tPZH Output Enable Time 1.5 6.5 ns
tPZL xOE to B
tPHZ Output Disable Time 1.5 6 ns
tPLZ xOE to B
tPZH Output Enable Time 1.5 6.5 ns
tPZL xOE to A
tPHZ Output Disable Time 1.5 6 ns
tPLZ xOE to A
tPZH Output Enable Time 1.5 6.5 ns
tPZL xDIR to B(3)
tPHZ Output Disable Time 1.5 6 ns
tPLZ xDIR to B(3)
tPZH Output Enable Time 1.5 6.5 ns
tPZL xDIR to A(3)
tPHZ Output Disable Time 1.5 6 ns
tPLZ xDIR to A(3)
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(1)
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.
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IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR INDUSTRIAL TEMPERATURE RANGE
Pulse
Generator
R
T
D.U.T.
V
CC
V
IN
C
L
V
OUT
50pF 500Ω
500Ω
6V
Open
GND
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
t
SU
t
H
t
REM
t
SU
t
H
PRESET
CLEAR
CLOCK ENABLE
ETC.
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
t
W
1.5V
1.5V
CONTROL
INPUT
3V
1.5V
0V
3V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
6V
SWITCH
GND
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3V
0V
1.5V
1.5V
ENABLE DISABLE
V
OH
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
V
OH
t
PLH
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
3V
1.5V
0V
t
PLH
t
PHL
t
PHL
V
OL
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
Set-up, Hold, and Release Times
Pulse Width
Test Switch
Open Drain
Disable Low 6V
Enable Low
Disable High GND
Enable High
All Other Tests Open
SWITCH POSITION
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
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INDUSTRIAL TEMPERATURE RANGE
IDT74FCT164245T
FAST CMOS 16-BIT BIDIRECTIONAL 3.3V TO 5V TRANSLATOR
ORDERING INFORMATION
XX
Temp. Range
FCT XX
Family
XXXX
Device Type
X
Package
PVG
PAG
245T
Shrink Small Outline Package - Green
Thin Shrink Small Outline Package - Green
16-Bit Bidirectional 3.3 Volt to 5 Volt Translator
74 40C to +85C
164 Double-Density
CORPORATE HEADQUARTERS for SALES: for Tech Support:
6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 logichelp@idt.com
San Jose, CA 95138 fax: 408-284-2775
www.idt.com
Datasheet Document History
09/28/09 Pg. 8 Updated the ordering information by removing the "IDT" notation and non RoHS part.
