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Product
Overview
California Micro Devices introduces the
new PicoGuard™ CM1215 and CM1216, two new ultra low-capacitance
diode arrays available in one, two, four, six and eight channel configurations.
These devices are particularly well-suited for protecting digital
consumer and computing system's high-speed data ports such as USB2.0,
IEEE1394 (Firewire®, iLink™), Serial ATA, DVI, HDMI. In
addition, these devices are suitable for protecting the corresponding
ports in removable storage, digital camcorders, DVD-RW drives and
other applications where extremely low loading capacitance with ESD
protection are required in a small package footprint. Product
Features
Each ESD channel consists of a pair of
diodes in series which steer the positive or negative ESD current
pulse to either the positive (VP)
or negative (VN)
supply rail. The CM1215 and CM1216 will protect against ESD pulses
up to ±15kV, exceeding the IEC 61000-4-2 level 4 standard
and can withstand over 1000 ESD strikes on the I/O pins without
damage.
The CM1215 and CM1216 exhibit a low channel input capacitance of
1.6pF( typical) and offer a channel-to-channel mutual capacitance
of only 0.13pF (typical). This low capacitance and tight matching
allows the CM1215 and CM1216 to be used in high-speed applications
with minimal signal integrity impact.
The CM1215 is available in configurations of 1, 2 and 4 channels
of ESD protection. The CM1216 is available in a 6 and 8 channel
configuration and features a integrated Zener diode across the VP
and VN
rails for further protection.
These devices are pin compatible with the PicoGuard™
CM1213 family, but with a higher level of ESD protection (±15kV
vs. ±8kV).The CM1215 and CM1216 are available in SOT-23,
SOT143, SOIC and MSOP packages and are available with optional lead-free
(Pb-free) finishing.
The CM1215 and CM1216 features
include:
- 1, 2, 4, 6 and 8 channels of ESD
protection
- Provides ±15 kV ESD protection
on each channel per the IEC 61000-4-2 ESD requirements
- Channel loading capacitance of 1.6
pF typical
- Channel I/O to GND capacitance difference
of 0.04pF typical
- Mutual capacitance of 0.13pF typical
- Minimal capacitance change with temperature
and voltage
- Each I/O pin can withstand over 1000
ESD strikes
- SOT packages
- Lead-free versions available
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| Key Feature |
CM1215 and CM1216 |
Typical Competitor Diode Array |
Benefit |
| Highest ESD Rating (IEC61000-4-2) |
15kV contact |
8kV contact |
Protects against higher levels of ESD strikes |
| Lowest Clamping Voltage |
9V |
12V |
Lower clamping voltage reduces soft and hard errors |
| Lowest Dynamic Resistance |
0.6 Ohm |
1.4 Ohm |
Reduces current and voltage seen by IC during strike, reducing
soft and hard errors |
Ultra-low Capacitance
(I/O to GND) |
1.6 pF |
3.0 pF |
Improves signal integrity on high speed ports |
| Lowest Mutual (I/O to I/O) Capacitance |
0.13 pF |
1.5 pF |
Minimizes crosstalk for improved signal integrity |
| Closely matched Capacitance |
0.04 pF |
not specified |
Minimizes signal skew and EMI |
| Reliability/Endurance |
> 1000 strikes |
not specified |
Survives multiple strikes typical of consumer applications |
Product Applications
The CM1215 and CM1216 are suitable for a number of applications
where low signal distortion is a primary consideration. These include:
- IEEE1394 Firewire® ports at 400Mbps
/ 800Mbps
- DVI ports, HDMI ports in notebooks, set
top boxes, digital TVs, digital still cameras, LCD displays
- Serial ATA ports in desktop PCs and hard
disk drives
- PCI Express ports
- General purpose high-speed data line ESD
protection
Sampling,
Pricing and Availability
The CM1215 and CM1216 are currently in production, and are priced
between $0.27 and $0.67 each at 1,000 units depending on number
of channels.
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