2.5 V/3.3 V, 2-Bit Common Control

Level Translator Bus Switch

ADG3242

Rev. A

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FEATURES

225 ps propagation delay through the switch

4.5 Ω switch connection between ports

Data rate 1.5 Gbps

2.5 V/3.3 V supply operation

Selectable level shifting/translation

Level translation

3.3 V to 2.5 V

3.3 V to 1.8 V

2.5 V to 1.8 V

Small signal bandwidth 710 MHz

8-lead SOT-23 package

APPLICATIONS

3.3 V to 2.5 V voltage translation

3.3 V to 1.8 V voltage translation

2.5 V to 1.8 V voltage translation

Bus switching

Bus isolation

Hot swap

Hot plug

Analog switch applications

FUNCTIONAL BLOCK DIAGRAM

A1

B1

BE

A0

B0

Figure 1.

GENERAL DESCRIPTION

The ADG3242 is a 2.5 V or 3.3 V, 2-bit, 2-port, common control

digital switch. It is designed on a low voltage CMOS process, and

provides low power dissipation, yet gives high switching speed

and very low on resistance. This allows the inputs to be connected

to the outputs without additional propagation delay or generating

additional ground bounce noise.

These switches are enabled by means of a common bus enable

(BE) input signal. This digital switch allows a bidirectional signal

to be switched when on. In the off condition, signal levels up

to the supplies are blocked.

This device is ideal for applications requiring level translation.

When operated from a 3.3 V supply, level translation from 3.3 V

inputs to 2.5 V outputs is allowed. Similarly, if the device is oper-

ated from a 2.5 V supply and 2.5 V inputs are applied, the device

translates the outputs to 1.8 V. In addition, a level translating

internally, allowing for level translation between 3.3 V inputs

and 1.8 V outputs. This makes the device suitable for applications

requiring level translation between different supplies, such as

converter to DSP/microcontroller interfacing.

PRODUCT HIGHLIGHTS

1.

3.3 V or 2.5 V supply operation.

2.

Extremely low propagation delay through switch.

3.

4.5 Ω switches connect inputs to outputs.

4.

Level/voltage translation.

5.

Tiny SOT-23 package.