DISCRETE SEMICONDUCTORS
DATA SHEET
book, halfpage
M3D302
BZA420A
Quadruple ESD transient voltage
suppressor
Product specification
Supersedes data of 1998 Oct 30
1999 May 20
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
FEATURES
•
ESD rating >8 kV, according to IEC1000-4-2
•
SOT457 surface mount package
•
Common anode configuration
•
Non-clamping range
−0.5
to 20 V
•
Maximum reverse peak power dissipation:
19.6 W at t
p
= 1 ms
•
Maximum clamping voltage at peak pulse current:
28 V at I
ZSM
= 0.7 A.
APPLICATIONS
•
Computers and peripherals
•
Audio and video equipment
•
Communication systems
•
Medical equipment.
1
2
3
MAM357
BZA420A
PINNING
PIN
1
2
3
4
5
6
cathode 1
common
cathode 2
cathode 3
common
cathode 4
DESCRIPTION
handbook, halfpage
6
5
4
1
3
4
6
2
5
DESCRIPTION
Monolithic transient voltage suppressor diode in a six lead
SOT457 (SC-74) package for 4-bit wide ESD transient
suppression at 20 V level.
Top view
Marking code:
Z0.
Fig.1 Simplified outline (SOT457) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
Per diode
I
Z
I
F
I
FSM
I
ZSM
P
tot
P
ZSM
T
stg
T
j
Notes
1. T
s
is the temperature at the soldering point of the anode pin.
2. DC working current limited by P
tot max
.
working current
continuous forward current
non-repetitive peak forward
current
non-repetitive peak reverse
current
total power dissipation
T
s
= 60
°C;
note 1
T
s
= 60
°C
t
p
= 1 ms; square pulse
t
p
= 1 ms; square pulse; see Fig.2
T
s
= 60
°C;
see Fig.3
−
−
−
−
−
−
−65
−65
note 2
100
3.75
0.7
720
19.6
+150
+150
mA
mA
A
A
mW
W
°C
°C
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
non repetitive peak reverse power square pulse; t
p
= 1 ms; see Fig.4
dissipation
storage temperature
junction temperature
1999 May 20
2
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
THERMAL CHARACTERISTICS
SYMBOL
R
th j-s
PARAMETER
thermal resistance from junction to soldering point
CONDITIONS
one or more diodes loaded
BZA420A
VALUE
125
UNIT
K/W
ELECTRICAL CHARACTERISTICS
T
j
= 25
°C
unless otherwise specified.
SYMBOL
Per diode
V
Z
V
F
V
ZSM
I
R
r
dif
S
Z
C
d
working voltage
forward voltage
reverse current
differential resistance
temperature coefficient of working
voltage
diode capacitance
I
Z
= 1 mA
I
F
= 200 mA
V
R
= 15 V
I
Z
= 1 mA
I
Z
= 5 mA
see Fig.5
V
R
= 0; f = 1 MHz
−
−
−
48
14
pF
pF
V
R
= 15 V; f = 1 MHz
−
19
−
−
−
−
−
20
−
−
−
−
16.2
21
1.3
28
100
125
−
V
V
V
nA
Ω
mV/K
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
non-repetitive peak reverse voltage I
ZSM
= 0.7 A; t
p
= 1 ms
1999 May 20
3
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA420A
handbook, halfpage
10
MDA197
1000
handbook, halfpage
Ptot
(mW)
800
MDA198
IZSM
(A)
600
1
400
200
10
−
1
10
−1
1
tp (ms)
10
0
0
50
100
150
Ts (
o
C)
200
All diodes loaded.
Fig.2
Maximum non-repetitive peak reverse
current as a function of pulse time.
Fig.3 Power derating curve.
10
2
handbook, halfpage
MDA199
handbook, halfpage
50
Cd
MDA200
PZSM
(W)
(pF)
40
30
10
20
10
1
10
−1
1
tp (ms)
10
0
0
5
10
VR (V)
15
P
ZSM
= V
ZSM
×
I
ZSM
.
V
ZSM
is the non-repetitive peak reverse voltage at I
ZSM
.
T
j
= 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.
1999 May 20
4
Philips Semiconductors
Product specification
Quadruple ESD transient voltage suppressor
BZA420A
handbook, full pagewidth
ESD TESTER
RZ
CZ
450
Ω
RG 223/U
50
Ω
coax
10×
ATTENUATOR
note 1
DIGITIZING
OSCILLOSCOPE
50
Ω
Note 1: attenuator is only used for open
socket high voltage measurements
IEC 1000-4-2 network
CZ = 150 pF; RZ = 330
Ω
1/4 BZA420A
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
(IEC 1000−4−2 network)
clamped
+1
kV ESD voltage waveform
(IEC 1000−4−2 network)
GND
GND
vertical scale = 100 V/Div
horizontal scale = 50 ns/Div
unclamped
−1
kV ESD voltage waveform
(IEC 1000−4−2 network)
vertical scale = 10 V/Div
horizontal scale = 50 ns/Div
clamped
−1
kV ESD voltage waveform
(IEC 1000−4−2 network)
MBK386
Fig.6 ESD clamping test set-up and waveforms.
1999 May 20
5
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