SN74CB3Q3125_15 Datasheet, PDF (9/26 Pages) Texas Instruments – Quadruple FET Bus Switch

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SN74CB3Q3125
SCDS143C – OCTOBER 2003 – REVISED JUNE 2015
8.3 Feature Description
The SN74CB3Q3125 device has a high-bandwidth data path (up to 500 MHz) and has 5-V tolerant I/Os with the
device powered up or powered down. It also has low and flat ON-state resistance (r_on) characteristics over
operating range (r_on = 4-Ω Typ).
The SN74CB3Q3125 device has rail-to-rail switching on data I/O ports for 0-V to 5-V switching with
3.3-V V_CCand 0-V to 3.3-V switching with 2.5-V V_CC as well as bidirectional data flow with near-zero propagation
delay and low input/output capacitance that minimizes loading and signal distortion (C_io(OFF) = 3.5-pF Typ).
The SN74CB3Q3125 device also provides a fast switching frequency (f_OE = 20-MHz Max) with data and control
inputs that provide undershoot clamp diodes as well as low power consumption (I_CC = 0.6-mA Typ).
The V_CC operating range is from 2.3 V to 3.6 V and the data I/Os support 0-V to 5-V signal levels of
(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V).
The control inputs can be driven by TTL or 5-V or 3.3-V CMOS outputs, and I_off supports partial-power-down
mode operation.
8.4 Device Functional Modes
Table 1 lists the functional modes for the SN74CB3Q3125 device.
INPUT
OE
L
H
Table 1. Function Table
INPUT/OUTPUT
A
B
Z
FUNCTION
A port = B port
Disconnect
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