Datasheet

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DESCRIPTION/ORDERING INFORMATION
SN74CB3Q3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS124B JULY 2003 REVISED MARCH 2005
Data and Control Inputs Provide Undershoot
Clamp Diodes
High-Bandwidth Data Path
(up to 500 MHz
(1)
) Low Power Consumption (I
CC
= 1 mA Typical)
Equivalent to IDTQS3VH384 Device V
CC
Operating Range From 2.3 V to 3.6 V
5-V Tolerant I/Os With Device Powered Up or Data I/Os Support 0- to 5-V Signaling Levels
Powered Down (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
Low and Flat ON-State Resistance (r
on
) Control Inputs Can Be Driven by TTL or
Characteristics Over Operating Range 5-V/3.3-V CMOS Outputs
(r
on
= 4 Typ)
I
off
Supports Partial-Power-Down Mode
Rail-to-Rail Switching on Data I/O Ports Operation
0- to 5-V Switching With 3.3-V V
CC
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
0- to 3.3-V Switching With 2.5-V V
CC
ESD Performance Tested Per JESD 22
Bidirectional Data Flow With Near-Zero
Propagation Delay 2000-V Human-Body Model
(A114-B, Class II)
Low Input/Output Capacitance Minimizes
Loading and Signal Distortion 1000-V Charged-Device Model (C101)
(C
io(OFF)
= 3.5 pF Typ)
Supports Both Digital and Analog
Fast Switching Frequency (f
OE
= 20 MHz Max) Applications: PCI Interface, Differential Signal
Interface, Memory Interleaving, Bus Isolation,
(1) For additional information regarding the performance
characteristics of the CB3Q family, refer to the TI application
Low-Distortion Signal Gating
report, CBT-C, CB3T, and CB3Q Signal-Switch Families,
literature number SCDA008.
The SN74CB3Q3245 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of
the pass transistor, providing a low and flat ON-state resistance (r
on
). The low and flat ON-state resistance allows
for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device
also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.
Specifically designed to support high-bandwidth applications, the SN74CB3Q3245 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
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.
Copyright © 2003–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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