SN74CBTLV3257DGV屬于集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器。由美國德州儀器公司制造生產(chǎn)的SN74CBTLV3257DGV信號(hào)開關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開關(guān)、多路復(fù)用器和編碼器 IC 可用于對(duì)以數(shù)字格式表示數(shù)據(jù)的電信號(hào)進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號(hào)的類似產(chǎn)品有所不同，它們保留的信息表示為兩個(gè)電狀態(tài)之一，而不是兩個(gè)外部界限內(nèi)的無窮變化量。

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.