MMBZ27VAL NXP Semiconductors, MMBZ27VAL Datasheet - Page 12

• Manufacturer Part Number: MMBZ27VAL
• Description: DIODE,DUAL TVS,UNI DIR,40W,22V,SOT23
• Manufacturer: NXP Semiconductors

Specifications of MMBZ27VAL

• Reverse Stand-off Voltage Vrwm: 22V
• Breakdown Voltage Range: 25.65V To 28.35V
• Clamping Voltage Vc Max: 40V
• Diode Configuration: Common Anode
• Peak Pulse Current Ippm: 1A
• Diode Case Style: SOT-23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
8. Application information
9. Test information
MMBZXAL_SER_2
Product data sheet
9.1 Quality information
The MMBZxAL series is designed for the protection of up to two unidirectional data or
signal lines from the damage caused by ESD and surge pulses. The devices may be used
on lines where the signal polarities are either positive or negative with respect to ground.
The MMBZ5V6AL, MMBZ6V2AL, MMBZ6V8AL, MMBZ9V1AL and MMBZ10VAL provide
a surge capability of 24 W per line, the MMBZ12VAL, MMBZ15VAL, MMBZ18VAL,
MMBZ20VAL, MMBZ27VAL and MMBZ33VAL provide a surge capability of 40 W per line,
for a 10/1000 μs waveform.
Circuit board layout and protection device placement
Circuit board layout is critical for the suppression of ESD, Electrical Fast Transient (EFT)
and surge transients. The following guidelines are recommended:
This product has been qualified in accordance with the Automotive Electronics Council
(AEC) standard Q101 - Stress test qualification for discrete semiconductors, and is
suitable for use in automotive applications.
1. Place the MMBZxAL series as close to the input terminal or connector as possible.
2. The path length between the MMBZxAL series and the protected line should be
3. Keep parallel signal paths to a minimum.
4. Avoid running protected conductors in parallel with unprotected conductors.
5. Minimize all PCB conductive loops including power and ground loops.
6. Minimize the length of the transient return path to ground.
7. Avoid using shared transient return paths to a common ground point.
8. Ground planes should be used whenever possible. For multilayer PCBs, use ground
Fig 10. Typical application: ESD and transient voltage protection of data lines
minimized.
vias.
unidirectional protection
Rev. 02 — 10 December 2009
Low capacitance unidirectional double ESD protection diodes
of two lines
line 1 to be protected
line 2 to be protected
MMBZxAL
GND
bidirectional protection
MMBZxAL series
of one line
MMBZxAL
line 1 to be protected
GND
006aab842
© NXP B.V. 2009. All rights reserved.
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