Datasheet BZA868A, BZA862A, BZA856A, BZA820A Datasheet (Philips)

DISCRETE SEMICONDUCTORS

DATA SHEET

ook, halfpage

MBD127

BZA800A-series

Quadruple ESD transient voltage
suppressor

Preliminary specification 1999 Nov 15

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage
suppressor

FEATURES

• ESD rating >8 kV, according to IEC1000-4-2

• SOT353 (SC-88A) surface mount package

• Common anode configuration

APPLICATIONS

• Computers and peripherals

• Audio and video equipment

• Communication systems

• Medical equipment.

DESCRIPTION

Monolithic transient voltage suppressor diode in a six lead
SOT353 (SC-88A) package for 4-bit wide ESD transient
suppression.

MARKING

BZA800A-series

PINNING

PIN DESCRIPTION

1 cathode 1
2 common anode
3 cathode 2
4 cathode 3
5 cathode 4

13

4

Top view

2

5

handbook, halfpage

c

2

1

b

2

3

4

b

1

5

e

1

c1/e

2

MAM212

2

TYPE NUMBER MARKING CODE

BZA856A Z1
BZA862A Z2
BZA868A Z3
BZA820A Z4

Fig.1 Simplified outline SOT353 (SC-88A)

1999 Nov 15 2

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage suppressor BZA800A-series

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

Per diode

I

Z

I

F

I

FSM

P

tot

P

ZSM

Tstg storage temperature −65 +150 °C
Tj junction temperature − 150 °C

working current Ta=25°C − note 1 mA
continuous forward current Ta=25°C − 100 mA
non-repetitive peak forward current tp= 1 ms; square pulse − 3.75 A
total power dissipation Ta=25°C − 335 mW
non repetitive peak reverse power

square pulse; tp= 1 ms; see Fig.3

dissipation

BZA856A, BZA862A, BZA868A − 24 W
BZA820A − 17 W

Notes

1. DC working current limited by P

tot max

.

THERMAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R

th j-a

thermal resistance from junction to

all diodes loaded 370 K/W

ambient

ELECTRICAL CHARACTERISTICS

=25°C unless otherwise specified.

T

j

SYMBOL PARAMETER CONDITIONS MAX. UNIT

V

F

I

R

= 25 °C unless otherwise specified

T

j

TYPE

forward voltage IF= 200 mA 1.3 V
reverse current

BZA856A V
BZA862A V
BZA868A V
BZA820A V

WORKING VOLTAGE

(V)

V

Z

at I

=1mA

Z

DIFFERENTIAL

RESISTANCE

r

at I

Z

(Ω)

dif

=1mA

= 3 V 2000 nA

R

= 4 V 700 nA

R

= 4.3 V 500 nA

R

= 15 V 100 nA

R

TEMP. COEFF.

(mV/K)

S

Z

at I

=1mA

Z

DIODE CAP.

(pF)

C

d

at f = 1 MHz;

V

=0V

R

NON-REPETITIVE P EAK

REVERSE CURRENT

(A) at tp=1ms;

I

ZSM

T

=25°C

amb

MIN. TYP. MAX. MAX. TYP. MAX. MAX.

BZA856A 5.32 5.6 5.88 400 0.5 240 3.2
BZA862A

5.89 6.2 6.51 300 1.2 200 2.9
BZA868A 6.46 6.8 7.14 300 3 180 2.6
BZA820A 19 20 21 125 16 50 0.6

1999 Nov 15 3

Philips Semiconductors Preliminary specification

Fig.2 Maximum non-repetitive peak reverse

current as a function of pulse time.

856

868

Fig.4 Diode capacitance as a function of reverse

voltage; typical values.

Tj=25°C; f = 1 MHz.

Quadruple ESD transient voltage suppressor BZA800A-series

10

I

ZSM

(A)

BZA

A

1

0.1

0.01 0.1 1 10

BZA

t

(ms)

p

100

P

ZSM

(W)

A

BZA820A

BZA856A, BZA862A, BZA868A

10

1

0.01 0.1 1 10
(ms)

t

p

P

ZSM=VZSM

V

ZSM

× I

.

is the non-repetitive peak reverse voltage at I

ZSM

ZSM

.

Fig.3 Maximum non-repetitive peak reverse

power dissipation as a function of pulse
duration (square pulse).

1999 Nov 15 4

200

C

d

(pF)

160

120

BZA856A

80

BZA862A
BZA868A

40

BZA820A

0

0 5 10 15

V

(V)

R

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage suppressor BZA800A-series

ESD Tester

CZ

IEC 1000-4-2 network

= 150 pF; RZ=330Ω

C

Z

GND

RZ 450 ohm

1/4 BZA800A

Vertical Scale = 100 V/Div
Horizontal Scale = 50 ns/Div

RG 223/U
50 ohm Coax

GND-3

GND-2

GND-1

Digitizing

10X

Oscilloscope

Atten u ator

note 1

Note 1: attenuator is only used for open
socket high voltage measurements

BZA820A

Vertical Scale =10 V/Div
Horizontal Scale = 50 ns/Div

BZA862A

BZA856A

50 ohm

unclamped +1 kV ESD voltage waveform
(IEC 1000-4-2 network

GND

Vertical Scale = 100 V/Div
Horizontal Scale = 50 ns/Div

unclamped −1 kV ESD voltage waveform
(IEC 1000-4-2 network

clamped +1 kV ESD voltage waveform
(IEC 1000-4-2 network

GND

clamped −1 kV ESD voltage waveform
(IEC 1000-4-2 network

Fig.5 ESD clamping test set-up and waveforms.

Vertical Scale =10 V/Div

Vertical Scale =10 V/Div

Horizo ntal Scal e = 50 ns/D iv

Horizontal Scale = 50 ns/Div

1999 Nov 15 5

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage suppressor BZA800A-series

APPLICATION INFORMATION

Typical common anode application

A quadruple transient suppressor in a SOT353 package makes it possible to protect four separate lines using only one
package. Two simplified examples are shown in Figs 6 and 7.

A

KEYBOARD
TERMINAL
PRINTER
ETC.

I/O

B
C
D

FUNCTIONA L
DECODER

BZA800A

Fig.6 Computer interface protection.

GND

Fig.7 Microprocessor protection.

1999 Nov 15 6

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage suppressor BZA800A-series

Device placement and printed-circuit board layout

Circuit board layout is of extreme importance in the
suppression of transients. The clamping voltage of the
BZA800A 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.

1999 Nov 15 7

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage suppressor BZA800A-series

PACKAGE OUTLINE

Plastic surface mounted package; 5 leads SOT353

D

y

132

e

1

e

E

H

E

AB

X

v M

A

45

Q

A

A

1

c

b

p

wBM

detail X

L

p

01 2 mm

scale

DIMENSIONS (mm are the original dimensions)

A

UNIT

mm

A

1.1

0.8

OUTLINE
VERSION

SOT353

max

0.1

1

b

cD

p

0.30

0.20

IEC JEDEC EIAJ

0.25

0.10

2.2

1.8

(2)

E

1.35

1.3

1.15

REFERENCES

e

H

L

e

0.65

E

1

2.2

0.45

2.0

0.15

Qywv

p

0.25

0.15

0.2 0.10.2

EUROPEAN

PROJECTION

ISSUE DATE

97-02-28SC-88A

1999 Nov 15 8

Philips Semiconductors Preliminary specification

Quadruple ESD transient voltage suppressor BZA800A-series

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.

1999 Nov 15 9

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1999

Internet: http://www.semiconductors.philips.com

68

Printed in The Netherlands 115002/00/03/pp10 Date of release: 1999 Nov 15 Document o rder number: 9397 750 06585