PHILIPS BZA109TS

DISCRETE SEMICONDUCTORS
DATA SHEET
M3D370
BZA109TS
9-fold ESD Transient Suppressor
Preliminary specification
File under Discrete Semiconductors, SC01
1997 Sep 08
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
FEATURES
DESCRIPTION
• ESD rating > 8 kV, according to IEC1000-4-2
Monolithic silicon zener diode in a SOT339-1 package
(SO20) for 9 bit wide undershoot/overshoot clamping,
combined with fast ESD transient suppression.
• SOT339 surface mount package
• Common anode configuration
• Non-clamping range 0 - 6.8 V,
negative clamping range <0.5 V,
positive clamping range >6.8 V.
APPLICATIONS
• Computer and peripherals
• Audio and video equipment
• Communication systems
• Medical equipment.
PINNING SOT339-1
book, halfpage
20
1
Top view
Fig.1 Symbol and pinning.
1997 Sep 08
11
10
MBK198
Fig.2 Simplified outline.
2
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
LIMITING VALUES (per diode)
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
IZ
reverse current
DC; Tamb = 25 °C
−
20
mA
IF
forward current
DC; Tamb = 25 °C
−
100
mA
IFT
feed-through current
DC; Tamb = 25 °C; note 1
−
100
mA
IFSM
peak forward current
tp = 1 ms; square wave
−
4.5
A
IZSM
peak reverse current
tp = 1 ms; square wave
2.5
A
Ptot
total power dissipation
Tamb = 25 °C; note 2
−
0.95
W
Tstg
storage temperature
−65
+150
°C
Tj
junction temperature
−65
+150
°C
THERMAL CHARACTERISTICS
SYMBOL
Rth j-a
PARAMETER
VALUE
UNIT
135
K/W
thermal resistance from junction to ambient; note 2
Note to the Limiting values and Thermal characteristics
1. Current is flowing from input to corresponding output.
2. One or more diodes loaded.
ELECTRICAL CHARACTERISTICS (per diode)
Tj = 25 °C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VZ
reverse voltage
IZ = 250 µA
6.4
6.8
7.2
V
VF
forward voltage
IF = 100 mA
−
−
1.1
V
VZSM
reverse surge voltage
tp = 1 ms; IZSM = 2.5 A
−
−
10
V
IH
input high current
VIN = 5.25 V
−
−
0.5
µA
RZ
zener impedance
IZ = 250 µA
−
−
100
Ω
SZ
temperature coefficient of VZ
CD
input diode capacitance
1997 Sep 08
−
3
−
f = 1 MHz; VR = 0
−
−
200
pF
f = 1 MHz; VR = 5.25 V
−
−
100
pF
3
mV/K
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
10
2
Ptot
(W)
IZSM
(A)
1.5
1
0.5
1
0
0.1
1
10
0
50
100
150
tp (ms)
200
TS (°C)
All diodes loaded.
Fig.3
Maximum non-repetitive peak reverse
current as a function of the pulse time.
Fig.4
Power derating curve.
150
100
P ZSM
(W)
CD
(pF)
100
10
50
0
1
0.1
1
0
10
1
2
3
4
5
6
VZ (V)
tp (ms)
PZSM = VZSM x IZSM;
VZSM is the non-repetitive peak reverse voltage at IZSM.
Fig.5
Tj = 25 °C; f = 1 MHz.
Maximum non-repetitive peak reverse
power dissipation as a function of the
pulse duration (square pulse).
1997 Sep 08
Fig.6
4
Diode capacitance as a function of the
working voltage; typical values.
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
GRAPHICAL DATA
IEC 1000-4-2 network
CZ = 150 pF; R Z = 330 Ω
Note 1: attenuator is only used for open
socket high voltage measurements
Vertical Scale = 10 V/Div
Horizontal Scale = 50 ns/Div
Vertical Scale = 100 V/Div
Horizontal Scale = 50 ns/Div
output
GND
GND
input
GND
Unclamped +1 kV ESD Voltage Waveform
(IEC1000-4-2 network)
Clamped +1 kV ESD Voltage Waveform
(IEC1000-4-2 network)
Vertical Scale = 10 V/Div
Horizontal Scale = 50 ns/Div
GND
GND
input
Vertical Scale = 100 V/Div
Horizontal Scale = 50 ns/Div
GND
output
Unclamped -1 kV ESD Voltage Waveform
(IEC1000-4-2 network)
Fig.7
1997 Sep 08
Clamped -1 kV ESD Voltage Waveform
(IEC1000-4-2 network)
ESD clamping test set-up and waveforms.
5
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
TYPICAL COMMON ANODE APPLICATION
A nine-fold transient suppressor in a SOT339 package gives the possibility to protect nine separate lines using only one
package. Two simplified examples are illustrated below.
Fig.8 Computer interface protection.
Fig.9 Microprocessor protection.
1997 Sep 08
6
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
DEVICE PLACEMENT AND PRINTED-CIRCUIT BOARD LAYOUT
Circuit board layout is of extreme importance in the suppression of transients. The clamping voltage of the BZA109TS 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 printed-circuit board layout should use minimal series conductor lengths.
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 in the area of the input terminals or connectors.
2. Reduce parallel signal paths.
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.
1997 Sep 08
7
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
PACKAGE OUTLINE
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
D
SOT339-1
E
A
X
c
HE
y
v M A
Z
20
11
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
L
1
10
w M
bp
e
detail X
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
2.0
0.21
0.05
1.80
1.65
0.25
0.38
0.25
0.20
0.09
7.4
7.0
5.4
5.2
0.65
7.9
7.6
1.25
1.03
0.63
0.9
0.7
0.2
0.13
0.1
0.9
0.5
8
0o
Note
1. Plastic or metal protrusions of 0.20 mm maximum per side are not included.
OUTLINE
VERSION
SOT339-1
1997 Sep 08
REFERENCES
IEC
JEDEC
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
93-09-08
95-02-04
MO-150AE
8
o
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
DEFINITIONS
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.
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.
1997 Sep 08
9
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
NOTES
1997 Sep 08
10
Philips Semiconductors
Preliminary specification
9-fold ESD Transient Suppressor
BZA109TS
NOTES
1997 Sep 08
11
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© Philips Electronics N.V. 1997
SCA55
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Printed in The Netherlands
117027/00/01/pp12
Date of release: 1997 Sep 08
Document order number:
9397 750 02834