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.