SN74CBT3125C_08 Datasheet, PDF (1/19 Pages) Texas Instruments – QUADRUPLE FET BUS SWITCH 5-V BUS SWITCH WITH -2-V UNDERSHOOT PROTECTION

SN74CBT3125C
QUADRUPLE FET BUS SWITCH
5ĆV BUS SWITCH WITH ć2ĆV UNDERSHOOT PROTECTION
SCDS122A − JULY 2003 − REVISED OCTOBER 2003
D Undershoot Protection for Off-Isolation on
A and B Ports Up To −2 V
D Bidirectional Data Flow, With Near-Zero
Propagation Delay
D Low ON-State Resistance (r_on)
Characteristics (r_on = 3 Ω Typical)
D Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 5 pF Typical)
D Data and Control Inputs Provide
Undershoot Clamp Diodes
D Low Power Consumption
(I_CC = 3 µA Max)
D V_CC Operating Range From 4 V to 5.5 V
D Data I/Os Support 0 to 5-V Signaling Levels
(0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)
D Control Inputs Can Be Driven by TTL or
5-V/3.3-V CMOS Outputs
D I_off Supports Partial-Power-Down Mode
Operation
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model
(A114-B, Class II)
− 1000-V Charged-Device Model (C101)
D Supports Both Digital and Analog
Applications: USB Interface, Bus Isolation,
Low-Distortion Signal Gating
D, DB, DGV, OR PW PACKAGE
(TOP VIEW)
1OE 1
1A 2
1B 3
2OE 4
2A ⁵
2B ⁶
GND ⁷
14 V_CC
13 4OE
12 4A
11 4B
10 _3OE
9 _3A
8 _3B
RGY PACKAGE
(TOP VIEW)
1
1A 2
1B 3
2OE 4
2A 5
2B 6
7
14
13 4OE
12 4A
11 4B
10 3OE
9 3A
8
DBQ PACKAGE
(TOP VIEW)
NC 1
1OE 2
1A 3
1B 4
2OE 5
2A 6
2B 7
GND 8
16 V_CC
15 4OE
14 4A
13 4B
12 3OE
11 3A
10 3B
9 NC
NC − No internal connection
description/ordering information
The SN74CBT3125C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (r_on),
allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the
SN74CBT3125C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring
that the switch remains in the proper OFF state.
The SN74CBT3125C is organized as four 1-bit bus switches with separate output-enable (1OE, 2OE, 3OE,
4OE) inputs. It can be used as four 1-bit bus switches or as one 4-bit bus switch. When OE is low, the associated
1-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports.
When OE is high, the associated 1-bit bus switch is OFF, and the high-impedance state exists between the A
and B ports.
This device is fully specified for partial-power-down applications using I_off. The I_off feature ensures that
damaging current will not backflow through the device when it is powered down. The device has isolation during
power off.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2003, Texas Instruments Incorporated
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