DATA SH EET
Product specification 2001 Sep 03
DISCRETE SEMICONDUCTORS
BZA900A-series
Quadruple ESD transient voltage
suppressor
M3D743
2001 Sep 03 2
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
FEATURES
•ESD rating >8 kV, according to IEC61000-4-2
•SOT665 surface mount package
•Common anode configuration.
APPLICATIONS
•Computers and peripherals
•Audio and video equipment
•Communication systems
DESCRIPTION
Monolithictransientvoltagesuppressordiodeinafivelead
SOT665 package for 4-bit wide ESD transient
suppression.
MARKING
PINNING
TYPE NUMBER MARKING CODE
BZA956A Z1
BZA962A Z2
BZA968A Z3
PIN DESCRIPTION
1 cathode 1
2 common anode
3 cathode 2
4 cathode 3
5 cathode 4
handbook, halfpage
MGW315
1
5
4
32
123
45
Fig.1 Simplified outline (SOT665) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
Notes
1. DC working current limited by Ptot(max).
2. Device mounted on standard printed-circuit board.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
Per diode
IZworking current Tamb =25°C−note 1 mA
IFcontinuous forward current Tamb =25°C−200 mA
IFSM non-repetitive peak forward current tp= 1 ms; square pulse −4A
P
tot total power dissipation Tamb =25°C; note 2; see Fig.5 −335 mW
PZSM non repetitive peak reverse power
dissipation: square pulse; tp= 1 ms; see Fig.3
BZA956A −16 W
BZA962A −15 W
BZA968A −14 W
Tstg storage temperature −65 +150 °C
Tjjunction temperature −150 °C
2001 Sep 03 3
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
THERMAL CHARACTERISTICS
Note
1. Solder point of common anode (pin 2).
ELECTRICAL CHARACTERISTICS
Tj=25°C unless otherwise specified.
Table 1 Per type; BZ956A to BZA968A
Tj=25°C unless otherwise specified.
SYMBOL PARAMETER CONDITIONS VALUE UNIT
Rth j-a thermal resistance from junction to ambient all diodes loaded 370 K/W
Rth j-s thermal resistance from junction to solder
point; note 1 one diode loaded 135 K/W
all diodes loaded 125 K/W
SYMBOL PARAMETER CONDITIONS MAX. UNIT
VFforward voltage IF= 200 mA 1.3 V
IRreverse current
BZA956A VR= 3 V 1000 nA
BZA962A VR= 4 V 500 nA
BZA968A VR= 4.3 V 100 nA
TYPE WORKING VOLTAGE
VZ(V)
at IZ=1mA
DIFFERENTIAL
RESISTANCE
rdif (Ω)
at IZ=1mA
TEMP.
COEFF.
SZ(mV/K) at
IZ=1mA
DIODE CAP.
Cd(pF)
atf = 1 MHz;
VR=0
NON-REPETITIVE
PEAK REVERSE
CURRENT
IZSM (A) at tp= 1 ms;
Tamb =25°C
MIN. TYP. MAX. MAX. TYP. MAX. MAX.
BZA956A 5.32 5.6 5.88 400 0.3 125 2.2
BZA962A 5.89 6.2 6.51 300 1.6 105 2.1
BZA968A 6.46 6.8 7.14 200 2.2 90 2.0
2001 Sep 03 4
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
GRAPHICAL DATA
handbook, halfpage
10
1
MGW318
10−210−1110
t
p
(ms)
IZSM
(A)
BZA956A
BZA968A
10−1
BZA962A
Fig.2 Maximum non-repetitive peak reverse
current as a function of pulse time.
handbook, halfpage
102
10
1
MGW319
10−210−1110
t
p
(ms)
PZSM
(W)
BZA956A
BZA968A
BZA962A
Fig.3 Maximum non-repetitive peak reverse
power dissipation as a function of pulse
duration (square pulse).
PZSM =V
ZSM ×IZSM.
VZSM is the non-repetitive peak reverse voltage at IZSM.
handbook, halfpage
02 68
120
0
MGW320
4
80
40
VR (V)
Cd
(pF)
BZA956A
BZA968A
BZA962A
Fig.4 Diode capacitance as a function of reverse
voltage; typical values.
Tj=25°C; f = 1 MHz.
handbook, halfpage
0 50 100 150
400
300
100
0
200
MGT586
Tamb (°C)
Ptot
(mW)
Fig.5 Power derating curve.
2001 Sep 03 5
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
handbook, full pagewidth
MGW321
450 Ω
50 Ω
Note 1: attenuator is only used for open
socket high voltage measurements
IEC 61000-4-2 network
CZ = 150 pF; RZ = 330 Ω1/4 BZA900A
RG 223/U
50 Ω coax
RZ
CZ
ESD TESTER DIGITIZING
OSCILLOSCOPE
10×
ATTENUATOR
note 1
GND
GND
GND
unclamped +1 kV ESD voltage waveform
(IEC 61000-4-2 network) clamped +1 kV ESD voltage waveform
(IEC 61000-4-2 network)
vertical scale = 100 V/div
horizontal scale = 50 ns/div
unclamped −1 kV ESD voltage waveform
(IEC 61000-4-2 network) clamped −1 kV ESD voltage waveform
(IEC 61000-4-2 network)
vertical scale = 100 V/div
horizontal scale = 50 ns/div vertical scale = 5 V/div
horizontal scale = 50 ns/div
vertical scale = 5 V/div
horizontal scale = 50 ns/div
BZA956A
BZA962A
BZA968A
Fig.6 ESD clamping test set-up and waveforms.
2001 Sep 03 6
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
APPLICATION INFORMATION
Typical common anode application
A quadruple transient suppressor in a SOT665 package makes it possible to protect four separate lines using only one
package. A simplified example is shown in Fig.7.
handbook, full pagewidth
GND
keyboard,
terminal,
printer,
etc. I/O
BZA900A
A
B
C
D
FUNCTIONAL
DECODER
MGW316
Fig.7 Computer interface protection.
Device placement and printed-circuit board layout
Circuit board layout is of extreme importance in the suppression of transients. The clamping voltage of the BZA900A is
determinedby the peak transient currentand the rateof rise of that current(di/dt). Since parasiticinductances canfurther
add to the clamping voltage (V = L di/dt) the series conductor lengths on the printed-circuit board should be kept to a
minimum. This includes the lead length of the suppression element.
In addition to minimizing conductor length the following printed-circuit board layout guidelines are recommended:
1. Place the suppression element close to the input terminals or connectors
2. Keep parallel signal paths to a minimum
3. Avoid running protection conductors in parallel with unprotected conductors
4. Minimize all printed-circuit board loop areas including power and ground loops
5. Minimize the length of the transient return path to ground
6. Avoid using shared transient return paths to a common ground point.
2001 Sep 03 7
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
PACKAGE OUTLINE
UNIT bpcDE e1HELpw
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
01-01-04
01-08-27
IEC JEDEC EIAJ
mm 0.27
0.17 0.18
0.08 1.7
1.5 1.3
1.1 0.5
e
1.0 1.7
1.5 0.1
y
0.1
DIMENSIONS (mm are the original dimensions)
0.3
0.1
SOT665
bp
D
e1
e
A
Lp
detail X
HE
E
wMA
A
S
0 1 2 mm
scale
A
0.6
0.5
c
X
123
45
Plastic surface mounted package; 5 leads SOT665
YS
2001 Sep 03 8
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
DATA SHEET STATUS
Notes
1. Please consult the most recently issued data sheet before initiating or completing a design.
2. The product status of the device(s) described in this data sheet may have changed since this data sheet was
published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com.
DATA SHEET STATUS(1) PRODUCT
STATUS(2) DEFINITIONS
Objective data Development This data sheet contains data from the objective specification for product
development. Philips Semiconductors reserves the right to change the
specification in any manner without notice.
Preliminary data Qualification This data sheet contains data from the preliminary specification.
Supplementary data will be published at a later date. Philips
Semiconductors reserves the right to change the specification without
notice, in order to improve the design and supply the best possible
product.
Product data Production This data sheet contains data from the product specification. Philips
Semiconductors reserves the right to make changes at any time in order
to improve the design, manufacturing and supply. Changes will be
communicated according to the Customer Product/Process Change
Notification (CPCN) procedure SNW-SQ-650A.
DEFINITIONS
Short-form specification The data in a short-form
specification is extracted from a full data sheet with the
same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition Limiting values given are in
accordance with the Absolute Maximum Rating System
(IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device.
These are stress ratings only and operation of the device
attheseoratanyotherconditionsabovethosegiveninthe
Characteristics sections of the specification is not implied.
Exposure to limiting values for extended periods may
affect device reliability.
Application information Applications that are
described herein for any of these products are for
illustrative purposes only. Philips Semiconductors make
norepresentationorwarrantythatsuch applicationswillbe
suitable for the specified use without further testing or
modification.
DISCLAIMERS
Life support applications These products are not
designed for use in life support appliances, devices, or
systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips
Semiconductorscustomersusingorselling theseproducts
for use in such applications do so at their own risk and
agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Right to make changes Philips Semiconductors
reserves the right to make changes, without notice, in the
products, including circuits, standard cells, and/or
software, described or contained herein in order to
improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for
theuse of anyoftheseproducts,conveysnolicence or title
under any patent, copyright, or mask work right to these
products,andmakesnorepresentations or warranties that
these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified.
2001 Sep 03 9
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
NOTES
2001 Sep 03 10
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
NOTES
2001 Sep 03 11
Philips Semiconductors Product specification
Quadruple ESD transient voltage suppressor BZA900A-series
NOTES
© Koninklijke Philips Electronics N.V. 2001 SCA73
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
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Contact information
For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825
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Printed in The Netherlands 613514/1000/01/pp12 Date of release: 2001 Sep 03 Document order number: 9397 750 08542
