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CM1240

Dual-Voltage ESD Protection Array for USB Ports

ON Semiconductor 

Dual-Voltage ESD Protection

Array for USB Ports

CM1240

Features

• Four channels of ESD Protection

• ±8kV ESD protection (IEC 61000-4-2, contact

discharge)

• ±16kV ESD protection (HBM)

• SOT-563 space-saving package

• RoHS-compliant, lead-free finishing

• 16V clamp on Vcc

Applications

• USB and mini-USB applications

• I/O port protection for mobile handsets

• Wireless handsets

Product Description

The CM1240 is a 4-channel ESD protection array. Three

channels of the CM1240 are low voltage (LV) diodes,

which have a capacitance of 7pF enabling them to protect

high speed I/O ports while providing robust ESD

protection. The other channel of the CM1240 is a high

voltage (HV) diode which has a capacitance of 25pF

enabling it to protect power supply inputs or OLED power

rails, etc.

The parts integrate avalanche-type ESD diodes, which

provide a very high level of protection for sensitive

electronic components that may be subjected to

electrostatic discharge (ESD). The ESD protection diodes

are designed and characterized to safely dissipate ESD

strikes of ±8kV, the maximum requirement of the

IEC61000-4-2 international standard. Using the MIL-STD-

883 (Method 3015) specification for Human Body Model

(HBM) ESD, the pins are protected for contact discharges

of greater than ±16kV.

This device is particularly well suited for portable

electronics (e.g. wireless handsets, PDAs, notebook

computers) because of its small package format and easy-

to-use pin assignments. In particular, the CM1240 is ideal

for protecting USB or mini-USB ports operating at full

speed (12Mbps).

©2010 SCILLC. All rights reserved.

April 2010 – Rev.3

Publication Order Number:

CM1240/D

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