SN74CBTLV3857集成电路（IC）的信号开关多路复用器解码器规格书PDF中文资料

SN74CBTLV3857属于集成电路（IC）的信号开关多路复用器解码器。由德州仪器制造生产的SN74CBTLV3857信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。

Enable Signal Is SSTL_2 Compatible

Flow-Through Architecture Optimizes PCB

Layout

Designed for Use With 200 Mbit/s Double

Data-Rate (DDR) SDRAM Applications

Switch On-State Resistance Is Designed to

Eliminate Series Resistor to DDR SDRAM

Internal 10-kΩ Pulldown Resistors to

Ground on B Port

Internal 50-kΩ Pullup Resistor on

Output-Enable Input

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

description/ordering information

This 10-bit FET bus switch is designed for 3-V to 3.6-V VCC operation and SSTL_2 output-enable (OE) input

levels.

When OE is low, the 10-bit bus switch is on, and port A is connected to port B. When OE is high, the switch is

open, and the high-impedance state exists between the two ports. There are 10-kΩ pulldown resistors to ground

on the B port.

The FET switch on-state resistance is designed to replace the series terminating resistor in the SSTL_2

data path.

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.