UM3257 Datasheet, PDF(1/10 Page) Union Semiconductor, Inc.

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UM3257 Datasheet, PDF (1/10 Pages) Union Semiconductor, Inc. – Low-Voltage Dual SPDT Analog Switch

UM3257

Low-Voltage Dual SPDT Analog Switch

UM3257 DFN12 3.0Ã1.6

General Description

The UM3257 is dual SPDT analog switch fabricated with silicon gate CMOS technology. It

achieves very low propagation delay and RDS(ON) resistances while maintaining CMOS low power

dissipation. These make it ideal for portable and battery power applications.

The switch conducts signals within power rails equally well in both directions when on, and

blocks up to the power supply level when off. Break-before-make is guaranteed.

The select pin has over-voltage protection that allows voltages above VCC, up to 6.5V to be

present on the pin without damage or disruption of operation of the part, regardless of the

operating voltage.

The UM3257 can maintain low power consumption for rail-to-rail signaling as long as the control

signal input is held at a level that is greater than VIH minimum and less than VIL maximum by

improving the control circuitry input buffer. so the part can be used in mixed voltage rail

environments, especially services the mobile handset applications very well allowing for the direct

interface with baseband processor general purpose I/Os, and it is no longer necessary to have the

control input equal to VCC to maintain low power consumption

The UM3257 is in a 12-pin, ROHS compliant, DFN12 package. It measures 3.0Ã1.6mm. The

leads are spaced at a pitch of 0.5mm and are finished with lead free Ni-Pd. The small package

makes it ideal for use in portable electronics such as cell phones, digital cameras and PDAs.

Applications

z Sample-and-Hold Circuits

z Battery powered Equipment

z Audio and Video Signal Routing

z Communication Circuits

Features

z Lower ICC when the S Input is within the

required VIH and VIL bounds

z Low ON-State Resistance (10â¦)

z Control Inputs Are 5V Tolerant

z Low Charge Injection

z Excellent ON-State Resistance Matching

z Low Total Harmonic Distortion (THD)

z 1.65V to 5.5V Single-Supply Operation

z ESD Performance:

Human Body Modelï¼2KV

Machine Modelï¼200V

z DFN12 Package

z Pb-Free Package

Pin Configurations

Top View

XX: Weekly Code

UM3257 DFN12 3.0Ã1.6

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http://www.union-ic.com Rev.01 Aug.2008

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