GENERAL DESCRIPTION

The ADG3257 is a CMOS bus switch comprised of four 2:1 multiplexers/demultiplexers with high impedance outputs. The device is manufactured on a CMOS process. This provides low power dissipation yet high switching speed and very low on resistance, allowing the inputs to be connected to the outputs without adding propagation delay or generating additional ground bounce noise.

The ADG3257 operates from a single 3.3 V/5 V supply. The control logic for each switch is shown in Table 1. These switches are bidirectional when on. In the off state, signal levels are blocked up to the supplies. When the power supply is off, the switches remain in the off state, isolating Port A and Port B.

This bus switch is suited to both switching and level translation applications. It can be used in applications requiring level trans-lation from 3.3 V to 2.5 V when powered from 3.3 V. Additionally, with a diode connected in series with 5 V VDD, the ADG3257 may also be used in applications requiring 5 V to 3.3 V level translation.

FEATURES

100 ps propagation delay through the switch

2 Ω switches connect inputs to outputs

Data rates up to 933 Mbps

Single 3.3 V/5 V supply operation

Level translation operation

Ultralow quiescent supply current (1 nA typical)

3.5 ns switching

Switches remain in the off state when power is off

Standard 3257 type pinout

APPLICATIONS

Bus switching

Bus isolation

Level translation

Memory switching/interleaving

ADG3257BRQ-REEL属于集成电路（IC） > 信号开关，多路复用器，解码器。亚德诺半导体技术有限公司制造生产的ADG3257BRQ-REEL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。