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Low Voltage 1.65 V to 3.6 V, Bidirectional

Logic Level Translation, Bypass Switch

PRODUCT HIGHLIGHTS

1. Bidirectional level translation matches any voltage level from

1.65 V to 3.6 V.

2. The bypass switch offers high performance and is fully

guaranteed across the supply range.

3. Short circuit protection.

4. Tiny 8-lead SOT-23 package, 8.26 mm

8.26 mm board area,

or 8-lead MSOP.

Table I. Truth Table

EN

Signal Path

Function

LA1

→Y2, Y1→V

CC1

Enable Bypass Mode

HA1

→Y1, A2→Y2

Enable Normal Mode

*Patent Pending

FUNCTIONAL BLOCK DIAGRAM

EN

A1

A2

GND

Y2

Y1

0

1

FEATURES

Operates from 1.65 V to 3.6 V Supply Rails

Bidirectional Level Translation, Unidirectional

Signal Path

8-Lead SOT-23 and MSOP Packages

Bypass or Normal Operation

Short Circuit Protection

APPLICATIONS

JTAG Chain Bypassing

Daisy-Chain Bypassing

Digital Switching

GENERAL DESCRIPTION

The ADG3233 is a bypass switch designed on a submicron

process that operates from supplies as low as 1.65 V. The device

is guaranteed for operation over the supply range 1.65 V to 3.6 V.

It operates from two supply voltages, allowing bidirectional level

translation, i.e., it translates low voltages to higher voltages and

vice versa. The signal path is unidirectional, meaning data may

only flow from A to Y.

This type of device may be used in applications that require a

bypassing function. It is ideally suited to bypassing devices in a

JTAG chain or in a daisy-chain loop. One switch could be used for

each device or a number of devices, thus allowing easy bypassing

of one or more devices in a chain. This may be particularly

useful in reducing the time overhead in testing devices in the

JTAG chain or in daisy-chain applications where the user does

not wish to change the settings of a particular device.

The bypass switch is packaged in two of the smallest footprints

available for its required pin count. The 8-lead SOT-23 package

requires only 8.26 mm

8.26 mm board space, while the MSOP

package occupies approximately 15 mm

15 mm board area.