1
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLVR3384
LOW-VOLTAGE 10-BIT BUS SWITCH
AUGUST 2002
2002 Integrated Device Technology, Inc. DSC-5395/8c
INDUSTRIAL TEMPERATURE RANGE
APPLICATIONS:
• 3.3V High Speed Bus Switching and Bus Isolation
FEATURES:
• Isolation Under Power-Off Conditions
• Over-voltage tolerant
• Latch-up performance exceeds 100mA
•VCC = 2.3V - 3.6V, normal range
• ESD >2000V per MIL-STD-883, Method 3015; >200V using
machine model (C = 200pF, R = 0)
• Available in SSOP, QSOP, and TSSOP packages
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
IDT74CBTLVR3384
FUNCTIONAL BLOCK DIAGRAM SIMPLIFIED SCHEMATIC, EACH
SWITCH
LOW-VOLTAGE 10-BIT
BUS SWITCH
DESCRIPTION:
The CBTLVR3384 is a ten bit high-speed bus switch. It adds an internal
series resistor with each switch to reduce reflection noise in high speed
applications. When closed, the switch acts as a source (series) termination for
the driver connected to it.
The device is organized as dual 5-bit bus switches with separate output-
enable (OE) inputs, to allow use as two 5-bit bus switches or one 10-bit bus
switch. When OE is low, the associated 5-bit bus switch is on and A port is
connected to B port. When OE is high, the switch is open, and a high-impedance
state exists between the two ports.
To ensure the high-impedance state during power up or power down, OE
should be tied to VCC through a pullup resistor; the minimum value of the resistor
is determined by the current-sinking capability of the driver.
3
11
1
1A1
1A5
1OE
SW
SW 1B5
1B1
2
10
14
22
13
2A1
2A5
2OE
SW
SW 2B5
2B1
15
10 OE
AB
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INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLVR3384
LOW-VOLTAGE 10-BIT BUS SWITCH
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Max. Unit
VCC Supply Voltage Range –0.5 to 4.6 V
VIInput Voltage Range –0.5 to 4.6 V
Continuous Channel Current 128 mA
IIK Input Clamp Current, VI/O < 0 –50 mA
TSTG Storage Temperature Range –65 to +150 °C
NOTE:
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.
PIN CONFIGURATION
OPERATING CHARACTERISTICS(1)
Symbol Parameter Test Conditions Min. Max. Unit
VCC Supply Voltage 2.3 3.6 V
VIH High-Level Control Input Voltage VCC = 2.3V to 2.7V 1.7 — V
VCC = 2.7V to 3.6V 2 —
VIL Low-Level Control Input Voltage VCC = 2.3V to 2.7V — 0.7 V
VCC = 2.7V to 3.6V — 0.8
TAOperating Free-Air Temperature –40 +85 °C
NOTE:
1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
SSOP/ QSOP/ TSSOP
TOP VIEW
FUNCTION TABLE(1)
VCC
2A5
2A4
2B4
2B3
2A3
2A2
2B2
2B1
1B1
1A1
1A2
1B2
1B3
1A3
1A4
1B4
1B5
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
1
1OE
21
22
23
24
2A1
2OE
1A5
GND
2B5
Inputs Inputs/Outputs
1OE 2OE 1B1-1B5 2B1-2B5
L L 1A1-1A5 2A1-2A5
L H 1A1-1A5 Z
H L Z 2A1-2A5
HH Z Z
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
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INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLVR3384
LOW-VOLTAGE 10-BIT BUS SWITCH
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = –40°C to +85°C
NOTES:
1. Typical values are at 3.3V, +25°C ambient.
2. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC or GND.
3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages
of the two (A or B) terminals.
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
VIK Control Inputs, Data I/O VCC = 3V, II = –18mA — — –1.2 V
IIControl Inputs VCC = 3.6V, VI = VCC or GND — — ±1 µ A
IOZ Data I/O VCC = 3.6V, VO = 0V or 3.6V switch disabled — — 5 µA
IOFF VCC = 0V, VI or VO = 0V to 3.6V — — 10 µ A
ICC VCC = 3.6V, IO = 0, VI = VCC or GND — — 10 µA
∆ICC(2) Control Inputs VCC = 3.6V, one input at 3V, other inputs at VCC or GND — — 3 0 0 µA
CIControl Inputs VI = 3V or 0 — 4 — pF
CIO(OFF) VO = 3V or 0, OE = VCC —7—pF
Max. at VCC = 2.3V VI = 0 IO = 64mA — 30 47
Typ. at VCC = 2.5V IO = 24mA — 30 47
RON(3) VI = 1.7V IO = 15mA — 36 80 Ω
VI = 0 IO = 64mA — 30 42
VCC = 3V IO = 24mA — 30 42
VI = 2.4V IO = 15mA — 32 47
VCC = 2.5V ± 0.2V VCC = 3.3V ± 0.3V
Symbol Parameter Min. Max. Min. Max. Unit
tPD(1) Propagation Delay —0.9 —1.5 ns
A to B or B to A
tEN Output Enable Time 1 6 1 5.3 ns
OE to A or B
tDIS Output DisableTime 1 5.5 1 5.5 ns
OE to A or B
NOTE:
1 . The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance when driven by an ideal voltage source
(zero output impededance).
SWITCHING CHARACTERISTICS
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INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLVR3384
LOW-VOLTAGE 10-BIT BUS SWITCH
Open
VLOAD
GND
VCC
Pulse
Generator D.U.T.
500Ω
500Ω
CL
RT
VIN VOUT
(1, 2)
SAME PHASE
INPUT TR AN SITION
OPPOSITE PH ASE
INPUT TRA NSITION
0V
0V
VOH
VOL
tPLH tPHL
tPHL
tPLH
OUTPUT
VIH
VT
VT
VIH
VT
CONTROL
INPUT tPLZ 0V
OUTPUT
NORMALLY
LOW tPZH
0V
SWITCH
CLOSED
OUTPUT
NORMALLY
HIGH
ENABLE DISABLE
SWITCH
OPEN
tPHZ
0V
VOL + VLZ
VOH
VT
VT
tPZL
VLOAD/2 VLOAD/2
VIH
VT
VOL
VOH -VHZ
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.
Test Switch
tPLZ/tPZL VLOAD
tPHZ/tPZH GND
tPD Open
SWITCH POSITION
Symbol VCC(1)= 3.3V±0.3V VCC(2)= 2.5V±0.2V Unit
VLOAD 6 2 x Vcc V
VIH 3 Vcc V
VT1.5 Vcc / 2 V
VLZ 300 150 mV
VHZ 300 150 mV
CL50 30 pF
TEST CONDITIONS
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INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLVR3384
LOW-VOLTAGE 10-BIT BUS SWITCH
ORDERING INFORMATION
CORPORATE HEADQUARTERS for SALES: for Tech Support:
2975 Stender Way 800-345-7015 or 408-727-6116 logichelp@idt.com
Santa Clara, CA 95054 fax: 408-492-8674 (408) 654-6459
www.idt.com
IDT XX CBTLV XXX XX
Package
Device Type
Temp. Range
PY
Q
PG
74
Shrink Small Outline Pac ka ge
Quarter-size Small Outline Package
Thin Shrink Small Outl ine Package
Low-Voltage 10-Bit Bus Switch
–40°C to +85°C
3384
Family
X
25Ω series da m peni ng r e sistors on A and B po r t s
R
