___________________________________________________________________________

http://www.union-ic.com Rev.01 Mar.2012

1/11

UESD54B/55B/56B/57B/64B

Quad/Five/Six Line ESD Protection Diode Array

UESD54B SC70-5/SC88A/SOT353

UESD55B SC89-6/SOT563/SOT666

UESD56B SC89-6/SOT563/SOT666

UESD57B DFN1616-6L

UESD64B SC89-5/SOT553/SOT665

General Description

The UESD54B/55B/56B/57B/64B of TVS diode array is designed to protect sensitive electronics

from damage or latch-up due to ESD for use in applications where board space is at a premium. It is

unidirectional device and may be used on lines where the signal polarities are above ground. The

UESD54B/55B/64B will protect up to four lines, the UESD56B will protect up to five lines and the

UESD57B will protect up to six lines.

TVS diodes are solid-state devices feature large cross-sectional area junctions for conducting high

transient currents, specifically for transient suppression. It offers desirable characteristics for board

level protection including fast response time, low operating, low clamping voltage, and no device

degradation.

The UESD54B/55B/56B/57B/64B may be used to meet the immunity requirements of IEC 61000-4-2,

level 4. The small package makes them ideal for use in portable electronics such as cell phones,

PDA’s, notebook computers, and digital cameras.

Applications

Features

Cellular Handsets & Accessories

Cordless Phones

Personal Digital Assistants (PDA’s)

Notebooks & Handhelds

Portable Instrumentation

Digital Cameras

Peripherals

MP3 Players

Transient protection for data & power lines to

IEC 61000-4-2 (ESD) ±15kV (air), ±8kV

(contact)

Working Voltages: 5V

Low Leakage current

Low clamping voltage

Solid-state silicon avalanche technology

Ordering Information

Part

Number

Working

Voltage

Packaging Type

Channel

Marking

Code

Shipping

Qty

UESD54B

5.0V

SC70-5/SC88A/SOT353

4

UQ5

UESD55B

5.0V

SC89-6/SOT563/SOT666

4

UF5

UESD56B

5.0V

SC89-6/SOT563/SOT666

5

UB5

UESD57B

5.0V

DFN1616-6L

6

E57

UESD64B

5.0V

SC89-5/SOT553/SOT665

4

UR6

3000pcs/

7 Inch Reel