STMicroelectronics ESDA6V1-4BC6 Schematic [ru]
®
ESDA6V1-4BC6
Application Specific Discretes
A.S.D.™
APPLICATIONS
Where transient overvoltage protection in ESD
sensitive equipment is required, such as :
COMPUTERS
■
PRINTERS
■
COMMUNICATION SYSTEMS
■
VIDEO EQUIPMENT
■
Thisdevice is particularly adaptedto the protection
of symmetrical signals.
DESCRIPTION
The ESDA6V1-4BC6 is a monolithic array
designed to protect up to 4 lines in a bidirectional
way against ESD transients.
The device is ideal for situations where board
space is at a premium.
SUPPRESSOR FOR ESD PROTECTION
QUAD BIDIRECTIONAL TRANSIL
SOT23-6L (SC-74)
FUNCTIONAL DIAGRAM
SOT23-6L
FEATURES
■ 4 BIDIRECTIONAL TRANSIL FUNCTIONS
■
ESD PROTECTION FOR DATA, SIGNAL AND
BUS
V
CC
■
STAND OFF VOLTAGE RANGE: 5 V
■
LOW LEAKAGE CURRENT
■
PEAK PULSE POWER (8/20µs); 80W
■
CHANNEL SEPARATION: 80dB typ.@20KHz
BENEFITS
■
High ESD protection level
■
High integration
■
Suitable for high density boards
COMPLIES WITH THE FOLLOWING STANDARDS:
- IEC61000-4-2: 15 kV (air discharge)
8 kV (contact discharge)
- MIL STD 883E-Method 3015-7: class3
(human body model)
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November 2002- Ed: 1A
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ESDA6V1-4BC6
1. ESD protection by ESDA6V1-4BC6
With the focus of lowering the operation levels, the problem of malfunction caused by the environment is
critical. Electrostatic discharge (ESD) is a major cause of failure in electronic system.
Transient Voltage Suppressors are an ideal choice for ESD protection and have proven capable in
suppressing ESD events. They are capable of clamping the incoming transient to a low enough level such
that damage to the protected semiconductor is prevented.
Surface mount TVS arrays offer the best choice for minimal lead inductance.
They serve as parallel protection elements, connected between the signal line to ground. As the transient
risesabovethe operating voltage ofthedevice, the TVS arraybecomesa low impedance pathdivertingthe
transient current to ground.
Bidirectional protection for 0V biased signals.
DRIVER
1
2
3
6
5
4
CONNECTOR
The ESDA6V1-4BC6 array is the ideal product for use as board level protection of ESD sensitive
semiconductor components.
The tiny SOT23-6L package allows design flexibility in the design of “crowded” boards where the space
saving is at a premium. This enables to shorten the routing and can contribute to improve ESD
performance.
2. Circuit Board Layout
Circuit board layout is a critical design step in the suppression of ESD induced transients. The following
guidelines are recommended :
■
The ESDA6V1-4BC6 should be placed as near as possible to the input terminals or connectors.
■
Minimise the path length between the ESD suppressor and the protected device
■
Minimise all conductive loops, including power and ground loops
■
The ESD transient return path to ground should be kept as short as possible.
■
Use ground planes whenever possible.
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