1 Features

• Standard '245-type pinout

• Output voltage translation tracks VCC

• Supports mixed-mode signal operation on all data

I/O ports

– 5V Input down to 3.3V output level shift with

3.3V VCC

– 5V/3.3V input down to 2.5V output level shift

with 2.5V VCC

• 5V-tolerant I/Os with device powered up or

powered down

• Bidirectional data flow with near-zero propagation

delay

• Low ON-state resistance (ron) characteristics (ron =

5Ω typical)

• Low Input, output capacitance minimizes loading

(Cio(OFF) = 5pF typical)

• Data and control inputs provide undershoot clamp

diodes

• Low power consumption (ICC = 40μA maximum)

• VCC operating range from 2.3V to 3.6V

• Data I/Os support 0 to 5V signaling levels (0.8V,

1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V)

• Control inputs can be driven by TTL or 5V/3.3V

CMOS outputs

• Ioff supports partial-power-down mode operation

• Latch-up performance exceeds 250mA

per JESD 17

• ESD performance tested per JESD 22

– 2000V human-body model (A114-B, Class II)

– 1000V charged-device model (C101)

• Designed for low-power portable equipment

2 Applications

• Supports digital applications:

– Level translation

– PCI interface

– USB interface

– Memory interleaving

– Bus isolation

3 Description

The SN74CB3T3245 device is a high-speed, TTLcompatible,

8-bit FET bus switch with low ON-state

resistance (ron), allowing for minimal propagation

delay. The device fully supports mixed-mode signal

operation on all data I/O ports by providing voltage

translation that tracks VCC.