BZA418A [NXP]
Quadruple ESD transient voltage suppressor; 四ESD瞬态电压抑制器
| 型号： | BZA418A |
| 厂家： | 
NXP |
| 描述： | Quadruple ESD transient voltage suppressor |
| 文件： | 总12页 (文件大小：65K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DISCRETE SEMICONDUCTORS
DATA SHEET
book, halfpage
BZA418A
Quadruple ESD transient voltage
suppressor
Product specification
2002 Sep 02
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
FEATURES
PINNING
PIN
• ESD rating >8 kV, according to IEC1000-4-2
• SOT457 surface mount package
• Common anode configuration
DESCRIPTION
1
2
3
4
5
6
cathode 1
common
cathode 2
cathode 3
common
cathode 4
• Non-clamping range −0.5 to 18 V
• Maximum reverse peak power dissipation:
19.6 W at tp = 1 ms
• Maximum clamping voltage at peak pulse current:
27 V at IZSM = 0.7 A.
APPLICATIONS
handbook, halfpage
6
5
2
4
• Computers and peripherals
• Audio and video equipment
• Communication systems
• Medical equipment.
1
3
4
6
2
5
1
3
MAM357
Top view
DESCRIPTION
Monolithic transient voltage suppressor diode in a six lead
SOT457 (SC-74) package for 4-bit wide ESD transient
suppression at 18 V level.
Marking code: L1.
Fig.1 Simplified outline (SOT457) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL
Per diode
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
IZ
working current
Ts = 60 °C; note 1
−
−
−
note 2
100
mA
IF
continuous forward current
Ts = 60 °C
mA
A
IFSM
non-repetitive peak forward
current
tp = 1 ms; square pulse
3.75
IZSM
non-repetitive peak reverse
current
tp = 1 ms; square pulse; see Fig.2
−
0.7
A
Ptot
total power dissipation
Ts = 60 °C; see Fig.3
−
−
720
mW
W
PZSM
non repetitive peak reverse power square pulse; tp = 1 ms; see Fig.4
dissipation
19.6
Tstg
Tj
storage temperature
junction temperature
−65
−65
+150
+150
°C
°C
Notes
1. Ts is the temperature at the soldering point of the anode pin.
2. DC working current limited by Ptot max
.
2002 Sep 02
2
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
VALUE
UNIT
Rth j-s
thermal resistance from junction to soldering point one or more diodes loaded
125
K/W
ELECTRICAL CHARACTERISTICS
Tj = 25 °C unless otherwise specified.
SYMBOL
Per diode
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VZ
working voltage
forward voltage
non-repetitive peak reverse voltage IZSM = 0.7 A; tp = 1 ms
IZ = 1 mA
17.1
18
18.9
1.3
27
V
V
V
VF
IF = 200 mA
−
−
−
−
−
−
VZSM
IR
−
reverse current
VR = 14 V
IZ = 1 mA
−
75
nA
rdif
differential resistance
−
125
−
Ω
SZ
temperature coefficient of working IZ = 5 mA
voltage
14.4
mV/K
Cd
diode capacitance
see Fig.5
VR = 0; f = 1 MHz
−
−
−
48
14
pF
pF
VR = 13 V; f = 1 MHz −
2002 Sep 02
3
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
MDA197
MDA198
10
1000
handbook, halfpage
handbook, halfpage
P
tot
(mW)
800
I
ZSM
(A)
600
400
1
200
−1
10
0
0
−1
10
1
10
50
100
150
200
t
(ms)
o
p
T
( C)
s
All diodes loaded.
Fig.2 Maximum non-repetitive peak reverse
current as a function of pulse time.
Fig.3 Power derating curve.
MDA199
MDA200
2
10
50
handbook, halfpage
handbook, halfpage
C
d
(pF)
40
P
ZSM
(W)
30
20
10
10
1
10
0
0
−1
1
10
5
10
15
t
(ms)
p
V
(V)
R
PZSM = VZSM × IZSM
.
VZSM is the non-repetitive peak reverse voltage at IZSM
.
Tj = 25 °C; f = 1 MHz.
Fig.4 Maximum non-repetitive peak reverse
power dissipation as a function of pulse
duration (square pulse).
Fig.5 Diode capacitance as a function of reverse
voltage; typical values.
2002 Sep 02
4
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
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 6 and 7.
A
B
C
D
keyboard,
terminal,
printer,
etc.
I/O
FUNCTIONAL
DECODER
BZA418A
GND
MGU788
Fig.6 Computer interface protection.
V
V
DD
GG
address bus
RAM
ROM
data bus
CPU
I/O
CLOCK
control bus
BZA418A
GND
MGU789
Fig.7 Microprocessor protection.
5
2002 Sep 02
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
Device placement and printed-circuit board layout
Circuit board layout is of extreme importance in the
suppression of transients. The clamping voltage of the
BZA418A 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.
2002 Sep 02
6
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
PACKAGE OUTLINE
Plastic surface mounted package; 6 leads
SOT457
D
B
E
A
X
y
H
v
M
A
E
6
5
4
Q
pin 1
index
A
A
1
c
1
2
3
L
p
e
b
p
w
M B
detail X
0
1
2 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
A
b
c
D
E
e
H
L
Q
v
w
y
p
1
p
E
0.1
0.013
0.40
0.25
1.1
0.9
0.26
0.10
3.1
2.7
1.7
1.3
3.0
2.5
0.6
0.2
0.33
0.23
mm
0.95
0.2
0.2
0.1
REFERENCES
JEDEC
EUROPEAN
PROJECTION
OUTLINE
VERSION
ISSUE DATE
IEC
EIAJ
97-02-28
01-05-04
SOT457
SC-74
2002 Sep 02
7
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
DATA SHEET STATUS
PRODUCT
DATA SHEET STATUS(1)
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.
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.
DEFINITIONS
DISCLAIMERS
Short-form specification
The data in a short-form
Life support applications
These products are not
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.
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
Semiconductors customers using or selling these products
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.
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
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.
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
the use of any of these products, conveys no licence or title
under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that
these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified.
Application information
Applications that are
described herein for any of these products are for
illustrative purposes only. Philips Semiconductors make
no representation or warranty that such applications will be
suitable for the specified use without further testing or
modification.
2002 Sep 02
8
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
NOTES
2002 Sep 02
9
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
NOTES
2002 Sep 02
10
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA418A
NOTES
2002 Sep 02
11
Philips Semiconductors – a worldwide company
Contact information
For additional information please visit http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
© Koninklijke Philips Electronics N.V. 2002
SCA74
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.
Printed in The Netherlands
613514/01/pp12
Date of release: 2002 Sep 02
Document order number: 9397 750 10098
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