MONOLITHIC TRANSIL

ARRAY FOR DATA LINE PROTECTION

IN ACCORDANCE WITH :

- ESD standard :
. IEC 801-2

15kV

5ns / 50ns

. IEC 801-4

40A

5ns / 50ns

. IEC 801-5

1kV

1.2 / 50

25A

8 / 20

. MIL STD 883C - Method 3015-2

= 25kV

C = 150pF
R = 150

5 s duration

- Human body test :

= 4kV

C = 150pF
R = 150

FEATURES

HIGH SURGE CAPABILITY TRANSIL ARRAY
I

= 40 A 8/20

UP TO 5 BIDIRECTIONAL TRANSIL FUNC-
TIONS
BREAK DOWN VOLTAGE AND MAXIMUM DIF-
FERENTIAL

VOLTAGE

BETWEEN

TWO

INPUT PINS :
ITA6V5 = 6.5 V
ITA10 = 10 V
ITA18 = 18 V
ITA25 = 25 V
LOW CLAMPING FACTOR (V

/ V

) AT HIGH

CURRENT LEVEL
LOW LEAKAGE CURRENT
LOW INPUT CAPACITANCE

SO8

FUNCTIONAL DIAGRAM

DESCRIPTION

This is a specific transil array for RS232, RS423 in-
terface protection developed in monolithic chip
form in order to provide a high surge capability and
a low clamping voltage

EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS

5 GND

8 GND

April 1998 - Ed: 3

I/04 4

I/03 3

I/02 2

I/01 1

ITA6V5C1 / ITA10C1

ITA18C1 / ITA25C1

1/5

Symbol

Parameter

Value

Unit

Peak pulse current for 8/20

sexponential

pulse

See note

Wire I

t value

See note

0.6

stg

Storage and Junction Temperature Range

- 55 to + 150

125

ABSOLUTE RATINGS (limiting values) (0

Tamb

Note :

For surges greater than the maximum value specified, the
input/output will present first a short circuit to the common
bus line and after an open circuit caused by the wire.

V CL

VBR

V RM

IRM

I PP

Symbol

Parameter

Leakage Current @ V

Stand-off Voltage

Breakdown Voltage

Clamping Voltage

Surge Current

Input Capacitance

ELECTRICAL CHARACTERISTICS

Types

C 1

C 2

max

min

8/20

max

8/20

max

Note 1

Note 2

Note 3

-4

ITA6V5C1

6.5

750

550

ITA10C1

570

260

ITA18C1

350

180

ITA25C1

300

100

All parameters tested at 25

C, except where indicated.

Note 1: Between I/O pin and ground.
Note 2: Between two input Pins at 0 V Bias.
Note 3: Between two input Pins at V

100

%I pp

Pu lse wave for m 8/20 s

ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1

2/5

Note :

The curve of the figure 2 is specified for a junction temperature of 25

C before surge.

(W)

1E-03

1E-02

1E-01

1E+00

1E+01

1E+02

1E+01

1E+02

1E+03

1E+04

ITA25C1
ITA18C1
ITA10C1
ITA6V5C1

initial = 25 C

(ms) expo

Fig.1 : Typical Peak pulse power versus exponen-
tial pulse duration.

(A)

1E-02

1E-01

1E+00

1E+01

1E+00

1E+01

1E+02

1E+03

exponential waveform

(ms)

Fig.3 : Peak current I

inducing open circuit of the

wire for one input/output versus pulse duration
(typical values).

C (pF)

1E+00

1E+01

1E+02

1E+03

= 25 C

f = 1 MHz

(V)

ITA18C1

ITA25C1

ITA10C1

ITA6V5C1

Fig.4 : Junction capacitance versus reverse ap-
plied voltage for one input/output (typical values).

(V)

1E-01

1E+00

1E+01

1E+02

1E+00

1E+01

1E+02

1E+03

(A)

initial = 25 C

% I

t = 8

100

ITA25C1
ITA18C1
ITA10C1
ITA6V5C1

Fig.2 : Clamping voltage versus peak pulse cur-
rent exponentialwaveform 8/20

ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1

3/5

Fig 5 : EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS

UTILIZATION AS A BIDIRECTIONAL TRANSIL
ARRAY WITH 4 I/Os.
The main applicationof this device is to be configu-
rated as a 4, bidirectional Transil Array as per the
Pin-out of Fig 5.
Pins 5 and 8 are connected to ground.
INPUTS/OUTPUTS are from Pin 1 to Pin 4.

Note : The bidirectional functionis made with 2 uni-
directional Transils. One (T1) is connected to the
INPUT/OUTPUT, the other one (T2) is connected
to the ground (see Fig 5).
Ground is connected via 2 diodes T2 and T3 .
This allows to withstand 2 specified surges on 2 dif-
ferent lines at the same time.

UTILIZATION AS A BIDIRECTIONAL TRANSIL
ARRAY WITH 5 I/Os.
The ITAxxC1 can be used as a 5 bidirectional
Transil Array.
Ground can be connected to any pin (except 6 and
7).
The other pins are used as INPUTS and OUT-
PUTS.
The bidirectional function is made with 2 unidirec-
tional Transils T1 and T2. One example with
ground on Pin 8 is shown in Fig 6.
This configuration allows to withstand only one
specified surge at the same time.

INSTRUCTION GUIDE

This monolithic Transil Array is based on 6 Unidirectional Transils with a common cathode and can be con-
figurated to offer 4 or 5 bidirectional functions, according to the following customer application.

I/O4 4

I/O3 3

I/O2 2

I/O1 1

5 GND

8 GND

Fig 6 : EQUIVALENT TO 5 BIDIRECTIONAL TRANSILS

I/O4 4

I/O3 3

I/O2 2

I/O1 1

5 I/O5

8 GND

Types

Maximum differential voltage between two input pins at 25

ITA6V5C1

6.5

ITA10C1

ITA18C1

ITA25C1

APPLICATION NOTICE

ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1

4/5

ORDER CODE

ITA

25 C 1

INTEGRATED
TRANSIL ARRAY

min

PACKAGE
1=SO8 PLASTIC

COMMON GROUND

TYPE

ITA6V5C1

ITA10C1

ITA18C1

ITA25C1

MARKING

6V5C1

10C1

18C1

25C1

MARKING

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.

SGS-THOM SON Microelectronics GROUP OF COMPANIES

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PACKAGE MECHANICAL DATA
SO8

Weight : 0.077g

REF.

DIMENSIONS

Millimetres

Inches

Min.

Typ. Max. Min.

Typ. Max.

1.75

0.069

0.1

0.25 0.004

0.010

1.65

0.065

0.35

0.48 0.014

0.019

0.19

0.25 0.007

0.010

0.50

0.020

(typ)

4.8

5.0

0.189

0.197

5.8

6.2

0.228

0.244

1.27

0.050

3.81

0.150

3.8

4.0

0.15

0.157

0.4

1.27 0.016

0.050

0.6

0.024

(max)

ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1

5/5

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: ITA10C1

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: ITA10C1