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Электронный компонент: BZA462A

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DATA SHEET
Product specification
Supersedes data of 1998 Oct 30
1999 May 25
DISCRETE SEMICONDUCTORS
BZA462A
Quadruple ESD transient voltage
suppressor
book, halfpage
M3D302
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1999 May 25
2
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
FEATURES
ESD rating >15 kV, according to IEC1000-4-2
SOT457 surface mount package
Common anode configuration
Non-clamping range
-
0.5 to 6.2 V
Maximum reverse peak power dissipation:
24 W at t
p
= 1 ms
Maximum clamping voltage at peak pulse current:
9 V at I
ZSM
= 2.66 A.
APPLICATIONS
Computers and peripherals
Audio and video equipment
Communication systems
Medical equipment.
DESCRIPTION
Monolithic transient voltage suppressor diode in a six lead
SOT457 (SC-74) package for 4-bit wide ESD transient
suppression at 6.2 V level.
PINNING
PIN
DESCRIPTION
1
cathode 1
2
common
3
cathode 2
4
cathode 3
5
common
6
cathode 4
Fig.1 Simplified outline (SOT457) and symbol.
handbook, halfpage
1
3
2
4
5
6
1
3
4
6
2
5
Top view
MAM357
Marking code: Z2t.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Notes
1. T
s
is the temperature at the soldering point of the anode pin.
2. DC working current limited by P
tot max
.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
Per diode
I
Z
working current
T
s
= 60
C; note 1
-
note 2
mA
I
F
continuous forward current
T
s
= 60
C
-
100
mA
I
FSM
non-repetitive peak forward current
t
p
= 1 ms; square pulse
-
3.75
A
I
ZSM
non-repetitive peak reverse current
t
p
= 1 ms; square pulse; see Fig.2
-
2.66
A
P
tot
total power dissipation
T
s
= 60
C; see Fig.3
-
720
mW
P
ZSM
non repetitive peak reverse power
dissipation
square pulse; t
p
= 1 ms; see Fig.4
-
24
W
T
stg
storage temperature
-
65
+150
C
T
j
junction temperature
-
65
+150
C
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1999 May 25
3
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
THERMAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
T
j
= 25
C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
VALUE
UNIT
R
th j-s
thermal resistance from junction to soldering point
one or more diodes loaded
125
K/W
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Per diode
V
Z
working voltage
I
Z
= 1 mA
5.89
6.2
6.51
V
V
F
forward voltage
I
F
= 200 mA
-
-
1.3
V
V
ZSM
non-repetitive peak reverse voltage
I
ZSM
= 3.5 A; t
p
= 1 ms
-
-
9
V
I
R
reverse current
V
R
= 4 V
-
-
700
nA
r
dif
differential resistance
I
Z
= 1 mA
-
-
300
S
Z
temperature coefficient of working
voltage
I
Z
= 5 mA
-
1.2
-
mV/K
C
d
diode capacitance
see Fig.5
V
R
= 0; f = 1 MHz
-
-
200
pF
V
R
= 4 V; f = 1 MHz
-
-
110
pF
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1999 May 25
4
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
Fig.2
Maximum non-repetitive peak reverse
current as a function of pulse time.
handbook, halfpage
10
1
MBK479
10
-
1
1
IZSM
(A)
tp (ms)
10
Fig.3 Power derating curve.
All diodes loaded.
handbook, halfpage
0
50
100
200
1000
0
Ptot
(mW)
Ts (
o
C)
800
150
600
400
200
MDA198
Fig.4
Maximum non-repetitive peak reverse
power dissipation as a function of pulse
duration (square pulse).
P
ZSM
= V
ZSM
I
ZSM
.
V
ZSM
is the non-repetitive peak reverse voltage at I
ZSM
.
handbook, halfpage
10
2
10
1
PZSM
(W)
tp (ms)
MBK481
10
-
1
1
10
Fig.5
Diode capacitance as a function of reverse
voltage; typical values.
T
j
= 25
C; f = 1 MHz.
handbook, halfpage
0
6
5
200
0
Cd
(pF)
VR (V)
40
80
120
160
1
2
3
4
MBK480
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1999 May 25
5
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
Fig.6 ESD clamping test set-up and waveforms.
MBK478
450
50
Note 1: attenuator is only used for open
socket high voltage measurements
IEC 1000-4-2 network
CZ = 150 pF; RZ = 330
1/4 BZA462A
RG 223/U
50
coax
RZ
CZ
ESD TESTER
DIGITIZING
OSCILLOSCOPE
10
ATTENUATOR
note 1
GND
unclamped
+
1 kV ESD voltage waveform
(IEC 1000
-
4
-
2 network)
clamped
+
1 kV ESD voltage waveform
(IEC 1000
-
4
-
2 network)
unclamped
-
1 kV ESD voltage waveform
(IEC 1000
-
4
-
2 network)
clamped
-
1 kV ESD voltage waveform
(IEC 1000
-
4
-
2 network)
GND
GND
GND
vertical scale = 100 V/Div
horizontal scale = 50 ns/Div
vertical scale = 10 V/Div
horizontal scale = 50 ns/Div
vertical scale = 100 V/Div
horizontal scale = 50 ns/Div
vertical scale = 10 V/Div
horizontal scale = 50 ns/Div
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1999 May 25
6
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
APPLICATION INFORMATION
Typical common anode application
A quadruple transient suppressor in a SOT457 package makes it possible to protect four separate lines using only one
package. Two simplified examples are shown in Figs 7 and 8.
Fig.7 Computer interface protection.
handbook, full pagewidth
GND
keyboard,
terminal,
printer,
etc.
I/O
BZA462A
A
B
C
D
FUNCTIONAL
DECODER
MBK476
Fig.8 Microprocessor protection.
handbook, full pagewidth
MBK477
I/O
ROM
RAM
CPU
CLOCK
GND
VDD
VGG
data bus
control bus
address bus
BZA462A
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1999 May 25
7
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
Device placement and printed-circuit board layout
Circuit board layout is of extreme importance in the
suppression of transients. The clamping voltage of the
BZA462A is determined by the peak transient current and
the rate of rise of that current (di/dt). Since parasitic
inductances can further 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.
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1999 May 25
8
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
PACKAGE OUTLINE
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
SOT457
SC-74
w
B
M
bp
D
e
pin 1
index
A
A1
Lp
Q
detail X
HE
E
v
M
A
A
B
y
0
1
2 mm
scale
c
X
1
3
2
4
5
6
Plastic surface mounted package; 6 leads
SOT457
UNIT
A1
bp
c
D
E
HE
Lp
Q
y
w
v
mm
0.1
0.013
0.40
0.25
3.1
2.7
0.26
0.10
1.7
1.3
e
0.95
3.0
2.5
0.2
0.1
0.2
DIMENSIONS (mm are the original dimensions)
0.6
0.2
0.33
0.23
A
1.1
0.9
97-02-28
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1999 May 25
9
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
DEFINITIONS
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 customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
Data Sheet Status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). 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 at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
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1999 May 25
10
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
NOTES
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1999 May 25
11
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA462A
NOTES
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Philips Electronics N.V.
SCA
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.
Internet: http://www.semiconductors.philips.com
1999
65
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Printed in The Netherlands
115002/00/03/pp12
Date of release: 1999 May 25
Document order number:
9397 750 05926