Data Sheet

DATA SHEET
dbook, halfpage
M3D302
BZA408B
Quadruple bidirectional ESD
transient voltage suppressor
Product data sheet
Supersedes data of 1998 Jun 05
1998 Oct 15
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
FEATURES
BZA408B
PINNING
• ESD rating >15 kV, according to IEC1000-4-2
PIN
• SOT457 surface mount package
DESCRIPTION
1
• Non-clamping range: −5 V to +5 V
cathode 1
2, 5
ground
• Channel separation: >70 dB
3
cathode 2
• Low reverse current: <100 nA
4
cathode 3
• Low diode capacitance: <75 pF.
6
cathode 4
APPLICATIONS
• Protection of equipment, connected to data and
transmission lines, against voltage surges caused by
electrostatic discharge e.g:
handbook, halfpage
6
5
4
1
2
3
6
5
1
2
4
– Computers and peripherals
– Audio and video equipment
– Communication systems
– Medical equipment
Top view
– Portable electronics.
3
MAM409
Marking code: Z8.
DESCRIPTION
4-bit wide monolithic bidirectional ESD transient voltage
suppressor in a six lead SOT457 (SC-74) package.
Fig.1 Simplified outline (SOT457) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
Per diode (pin 2 and / or 5 connected to ground)
IZSM
non-repetitive peak reverse current
tp = 1 ms; square pulse; see Fig.2
−
2
A
PZSM
non-repetitive peak power
tp = 1 ms; square pulse
−
20
W
Tstg
storage temperature
−65
+150
°C
Tj
junction temperature
−65
+150
°C
1998 Oct 15
2
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
BZA408B
THERMAL CHARACTERISTICS
SYMBOL
Rth j-s
PARAMETER
CONDITIONS
thermal resistance from junction to soldering point
VALUE
UNIT
340
K/W
MAX.
UNIT
one or more diodes loaded
ELECTRICAL CHARACTERISTICS
Tj = 25 °C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
Per diode (pin 2 and / or 5 connected to ground)
VRWM
working reverse voltage
−
5
V
VR
reverse voltage
Itest = 5 mA
5.5
−
V
VZSM
non-repetitive peak reverse voltage
tp = 1 ms; IZSM = 2 A
−
10
V
IR
reverse current
VR = VRWM
−
100
nA
Cd
diode capacitance
see Fig.3
VR = 0; f = 1 MHz
−
75
pF
VR = 5 V; f = 1 MHz
−
55
pF
70
−
dB
αch (p to p)
pin to pin channel separation
note 1; see Fig.4
Note
1. αch (p to p) is measured as follows: a −7 dBs sinewave of 400 Hz is connected to e.g. pin 6 and a −7 dBs sinewave of
1 kHz to pin 1. The 1 kHz signal of pin 1 is measured on pin 6 by means of a spectrum analyser with an input
impedance of 1 MΩ. So αch (p to p) equals the 1 kHz level on pin 1 minus the 1 kHz level on pin 6. For the 400 Hz
signal the same measurement is done in the opposite way.
1998 Oct 15
3
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
BZA408B
GRAPHICAL DATA
MGR557
10
MGR558
80
handbook, halfpage
handbook, halfpage
Cd
(pF)
IZSM
(A)
60
1
40
10−1
10−2
10−1
20
1
tp (ms)
10
0
1
2
3
4
VR (V)
5
Tj = 25 °C; f = 1 MHz.
Fig.2
Maximum non-repetitive peak reverse
current as a function of pulse time.
Fig.3
Diode capacitance as a function of reverse
voltage; typical values.
handbook, full pagewidth
coaxial cable with
SMB connector
SPECTRUM
ANALYZER
1 MΩ
SIGNAL
GENERATOR
SIGNAL
GENERATOR
DUT
600 Ω
1
6
600 Ω
f = 1 kHz
−7 dBs
2
5
f = 400 Hz
−7 dBs
3
4
MGR556
Fig.4 Channel separation measurement setup.
1998 Oct 15
4
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
handbook, full pagewidthESD TESTER
450 Ω
RZ
BZA408B
RG 223/U
50 Ω coax
DIGITIZING
OSCILLOSCOPE
10×
ATTENUATOR
note 1
CZ
50 Ω
Note 1: attenuator is only used for open
socket high voltage measurements
IEC1000-4-2 network
CZ = 150 pF; RZ = 330 Ω
1/4 BZA408B
vertical scale = 100 V/Div
horizontal scale = 50 ns/Div
vertical scale = 10 V/Div
horizontal scale = 50 ns/Div
GND
GND
unclamped +1 kV ESD voltage waveform
(IEC1000-4-2 network)
clamped +1 kV ESD voltage waveform
(IEC1000-4-2 network)
GND
GND
vertical scale = 10 V/Div
horizontal scale = 50 ns/Div
vertical scale = 100 V/Div
horizontal scale = 50 ns/Div
unclamped −1 kV ESD voltage waveform
(IEC1000-4-2 network)
clamped −1 kV ESD voltage waveform
(IEC1000-4-2 network)
Fig.5 ESD clamping test set-up and waveforms.
1998 Oct 15
5
MGR560
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
BZA408B
APPLICATION INFORMATION
Typical bidirectional application
A quadruple bidirectional transient suppressor in a SOT457 package makes it possible to protect four separate lines
using only one package. One simplified example is shown in Fig.6.
handbook, full pagewidth
audio in L
audio in R
audio out L
audio out R
TVSET/VCR
SCART
CONNECTOR
BZA408B
GND
MGR559
Fig.6 Scart connector 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 BZA408B 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.
1998 Oct 15
6
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
BZA408B
PACKAGE OUTLINE
Plastic surface mounted package; 6 leads
SOT457
D
E
B
y
A
HE
6
X
v M A
4
5
Q
pin 1
index
A
A1
c
1
2
3
Lp
bp
e
w M B
detail X
0
1
2 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
A1
bp
c
D
E
e
HE
Lp
Q
v
w
y
mm
1.1
0.9
0.1
0.013
0.40
0.25
0.26
0.10
3.1
2.7
1.7
1.3
0.95
3.0
2.5
0.6
0.2
0.33
0.23
0.2
0.2
0.1
OUTLINE
VERSION
SOT457
1998 Oct 15
REFERENCES
IEC
JEDEC
EIAJ
SC-74
7
EUROPEAN
PROJECTION
ISSUE DATE
97-02-28
01-05-04
NXP Semiconductors
Product data sheet
Quadruple bidirectional ESD transient
voltage suppressor
BZA408B
DATA SHEET STATUS
DOCUMENT
STATUS(1)
PRODUCT
STATUS(2)
DEFINITION
Objective data sheet
Development
This document contains data from the objective specification for product
development.
Preliminary data sheet
Qualification
This document contains data from the preliminary specification.
Product data sheet
Production
This document contains the product specification.
Notes
1. Please consult the most recently issued document before initiating or completing a design.
2. The product status of device(s) described in this document may have changed since this document was published
and may differ in case of multiple devices. The latest product status information is available on the Internet at
URL http://www.nxp.com.
DISCLAIMERS
above those given in the Characteristics sections of this
document is not implied. Exposure to limiting values for
extended periods may affect device reliability.
General ⎯ Information in this document is believed to be
accurate and reliable. However, NXP Semiconductors
does not give any representations or warranties,
expressed or implied, as to the accuracy or completeness
of such information and shall have no liability for the
consequences of use of such information.
Terms and conditions of sale ⎯ NXP Semiconductors
products are sold subject to the general terms and
conditions of commercial sale, as published at
http://www.nxp.com/profile/terms, including those
pertaining to warranty, intellectual property rights
infringement and limitation of liability, unless explicitly
otherwise agreed to in writing by NXP Semiconductors. In
case of any inconsistency or conflict between information
in this document and such terms and conditions, the latter
will prevail.
Right to make changes ⎯ NXP Semiconductors
reserves the right to make changes to information
published in this document, including without limitation
specifications and product descriptions, at any time and
without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
No offer to sell or license ⎯ Nothing in this document
may be interpreted or construed as an offer to sell products
that is open for acceptance or the grant, conveyance or
implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Suitability for use ⎯ NXP Semiconductors products are
not designed, authorized or warranted to be suitable for
use in medical, military, aircraft, space or life support
equipment, nor in applications where failure or malfunction
of an NXP Semiconductors product can reasonably be
expected to result in personal injury, death or severe
property or environmental damage. NXP Semiconductors
accepts no liability for inclusion and/or use of NXP
Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at
the customer’s own risk.
Export control ⎯ This document as well as the item(s)
described herein may be subject to export control
regulations. Export might require a prior authorization from
national authorities.
Quick reference data ⎯ The Quick reference data is an
extract of the product data given in the Limiting values and
Characteristics sections of this document, and as such is
not complete, exhaustive or legally binding.
Applications ⎯ Applications that are described herein for
any of these products are for illustrative purposes only.
NXP Semiconductors makes no representation or
warranty that such applications will be suitable for the
specified use without further testing or modification.
Limiting values ⎯ Stress above one or more limiting
values (as defined in the Absolute Maximum Ratings
System of IEC 60134) may cause permanent damage to
the device. Limiting values are stress ratings only and
operation of the device at these or any other conditions
1998 Oct 15
8
NXP Semiconductors
Customer notification
This data sheet was changed to reflect the new company name NXP Semiconductors, including new legal
definitions and disclaimers. No changes were made to the technical content, except for package outline
drawings which were updated to the latest version.
Contact information
For additional information please visit: http://www.nxp.com
For sales offices addresses send e-mail to: [email protected]
© NXP B.V. 2009
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
115104/00/02/pp9
Date of release: 1998 Oct 15
Document order number: 9397 750 04313
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