SN74CBTLV3257DR.Z中文资料德州仪器数据手册PDF规格书

1 Features

1• 5-Ω Switch Connection Between Two Ports

• Rail-to-Rail Switching on Data I/O Ports

• Ioff Supports Partial-Power-Down Mode Operation

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

• ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

2 Applications

• Internet of Things

• Wireless Headphones

• Television Set

• 4-Bit Bus Multiplexing and Demultiplexing

3 Description

The SN74CBTLV3257 device is a 4-bit 1-of-2 highspeed

FET multiplexer/demultiplexer. The low onstate

resistance of the switch allows connections to

be made with minimal propagation delay.

The select (S) input controls the data flow. The FET

multiplexers/demultiplexers are disabled when the

output-enable (OE) input is high.

This device is fully specified for partial-power-down

applications using Ioff. The Ioff feature ensures that

damaging current will not backflow through the device

when it is powered down. The device has isolation

during power off.

To ensure the high-impedance state during power up

or power down, OE should be tied to VCC through a

pullup resistor; the minimum value of the resistor is

determined by the current-sinking capability of the

driver.