CM1230 Datasheet, PDF (1/16 Pages) California Micro Devices Corp – 2, 4 and 8-Channel Low Capacitance ESD Protection Array

2, 4, and 8-Channel Low-Capacitance
ESD Protection Array
CM1230
Features
• Two, four, and eight channels of ESD protection
•
Provides ESD protection to IEC61000-4-2
Level 4
• ±8kV contact discharge
• ±15kV air discharge
• Low loading capacitance of 0.8pF typical
• Minimal capacitance change with temperature
and voltage
• Channel I/O to GND capacitance difference of
0.02pF typical is ideal for differential signals
• Channel I/O to I/O capacitance 0.15pF typical
• Zener diode protects supply rail and eliminates
the need for external by-pass capacitors
• Each I/O pin can withstand over 1000 ESD
strikes*
• Available in 4, 6 and 10 bump Chip Scale
Packages (CSP)
• OptiGuard™ coated for improved reliability at
assembly
• RoHS-compliant, lead-free version finishing
Applications
• LCD and camera data lines in wireless
handsets that use high-speed serial interfaces.
• I/O port protection for mobile handsets,
notebook computers, DSCs, MP3 players,
PDAs, etc. including USB, 1394 and serial ATA
• Wireless handsets
• Handheld PCs/PDAs
• LCD and camera modules
Product Description
The CM1230 is a family of 2, 4 and 8 channel, very
low capacitance ESD protection diode arrays in a
CSP form factor. It is ideal for protecting systems
with high data and clock rates or for circuits that
need low capacitive loading. Each channel consists
of a pair of ESD diodes that act as clamp diodes to
steer ESD current pulses to either the positive or
negative supply rail. A zener diode is integrated
between the positive and negative supply rails. The
V_CC rail is protected from ESD strikes and eliminates
the need for a bypass capacitor to absorb positive
ESD strikes to ground. Each channel can safely
dissipate ESD strikes of ±8kV, meeting the Level 4
requirement of the IEC61000-4-2 international
standard as well as ±15kV air discharges per the
IEC61000-4-2 specification. Using the MIL-STD-
883 (Method 3015) specification for Human Body
Model (HBM) ESD, the pins are protected for
contact discharges at greater than ±15kV.
This device is well-suited for next generation
wireless handsets that implement high-speed serial
interface solutions for the LCD display and camera
interfaces. In these designs, a tolerance above
1.5pF cannot be tolerated when high data rates are
transferred between the baseband choppiest and
the LCD driver/controller Is. Higher capacitive
loading normally causes the rise and fall times to
slow which hampers the functionality of circuit and
operation of the wireless handset. The CM1230
incorporates OptiGuard™ which results in improved
reliability at assembly. The CM1230 is available in a
space-saving, low profile Chip Scale Package with
RoHS-compliant, lead-free finishing.
©2010 SCILLC. All rights reserved.
May 2010 – Rev. 2
Publication Order Number:
CM1230/D