ITA25C1 [STMICROELECTRONICS]

MONOLITHICTRANSIL ARRAY FOR DATA LINE PROTECTION; MONOLITHICTRANSIL阵列，用于数据线路保护


型号：	ITA25C1
厂家：	ST
描述：	MONOLITHICTRANSIL ARRAY FOR DATA LINE PROTECTION MONOLITHICTRANSIL阵列，用于数据线路保护瞬态抑制器二极管光电二极管局域网
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ITA6V5C1 / ITA10C1

ITA18C1 / ITA25C1

MONOLITHIC TRANSIL ARRAY FOR DATA LINE PROTECTION

FEATURES

HIGH SURGE CAPABILITY TRANSIL ARRAY

_PP= 40 A 8/20µs

UP TO 5 BIDIRECTIONAL TRANSIL FUNC-

TIONS

BREAKDOWNVOLTAGEAND MAXIMUMDIF-

FERENTIAL VOLTAGE BETWEEN TWO

INPUT PINS :

ITA6V5 = 6.5 V

ITA10 = 10 V

ITA18 = 18 V

ITA25 = 25 V

LOW CLAMPINGFACTOR (V_CL/ V_BR) AT HIGH

CURRENT LEVEL

SO8

LOW LEAKAGECURRENT

LOW INPUT CAPACITANCE

DESCRIPTION

Thisis a specifictransil arrayfor RS232, RS423 in-

terface protection developed in monolithic chip

form in order to provide a high surge capabilityand

a low clamping voltage

FUNCTIONAL DIAGRAM

IN ACCORDANCE WITH :

- ESD standard :

. IEC 801-2

. IEC 801-4

. IEC 801-5

15kV 5ns / 50ns

40A

1kV

25A

5ns / 50ns

1.2 / 50µs

8 / 20µs

GND

I/01 1

I/02 2

. MIL STD 883C - Method 3015-2

V_P= 25kV

C = 150pF

R = 150Ω

5 s duration

I/03 3

I/04 4

5 GND

- Human body test :

V_P= 4kV

C = 150pF

R = 150Ω

EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS

April 1998 - Ed: 3

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ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1

ABSOLUTE RATINGS (limiting values) (0°C ≤ Tamb ≤ 70°C)

Symbol

Parameter

Value

Unit

I_PP

Peak pulse current for 8/20 µsexponential

Seenote

pulse

I²t

Wire I²t value

0.6

A²s

T_stg

T_j

Storage and Junction Temperature Range

- 55 to + 150

125

°C

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.

100

Pulse wave form 8/20

ELECTRICAL CHARACTERISTICS

Symbol

I_RM

Parameter

Leakage Current @ V_RM

Stand-off Voltage

Breakdown Voltage

Clamping Voltage

SurgeCurrent

V_RM

V_BR

V_CL

I_PP

Input Capacitance

I_RM

V_RMV_BR

I_R

V_CL

I_PP

V_CL

I_PP

C 1

C 2

max

min

8/20 s

max

Note 1

8/20 s

max

Types

Note 1

Note 2 Note 3

µA

10^-4/°C

ITA6V5C1

ITA10C1

ITA18C1

ITA25C1

6.5

750

550

570

350

300

260

180

100

All parameterstested at 25°C, except where indicated.

Note 1: BetweenI/O pin and ground.

Note 2: Betweentwo input Pins at 0 V Bias.

Note 3:

Betweentwo input Pins at V_RM

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ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1

Fig.1 :

tial pulse duration.

Fig.2 :

Typical Peak pulse power versus exponen-

Clamping voltage versus peak pulse cur-

rent exponentialwaveform 8/20 µs.

(W)

(V)

1E+04

1E+03

1E+02

initial = 25^oC

% I

initial = 25^oC

= 8

100

ITA25C1

ITA18C1

ITA10C1

ITA6V5C1

ITA25C1

ITA18C1

ITA10C1

ITA6V5C1

1E+02

1E+01

1E+00

(A)

(ms) expo

1E-03

1E-02

1E-01

1E+00 1E+01 1E+02

1E-01

1E+00

1E+01

1E+02

Fig.3: PeakcurrentI_DCinducingopencircuitof the

wire for one input/output versus pulse duration

(typical values).

Fig.4 : Junction capacitance versus reverse ap-

plied voltage for one input/output(typical values).

(A)

C (pF)

1E+03

= 25 ^o

exponential waveform

ITA6V5C1

ITA10C1

f = 1 MHz

1E+02

ITA18C1

1E+01

1E+00

ITA25C1

(V)

(ms)

1E+02

1E+00

1E-02

1E-01

1E+00

1E+01

1E+02

Note :

The curve of the figure 2 is specified for a junction temperature of 25 C before surge.

3/5

ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1

APPLICATION NOTICE

Types

Maximum differentialvoltage between two input pins at 25°C

6.5

ITA6V5C1

ITA10C1

ITA18C1

ITA25C1

INSTRUCTION GUIDE

This monolithicTransil Arrayis basedon 6 UnidirectionalTransils witha common cathodeand can be con-

figurated to offer 4 or 5 bidirectionalfunctions, accordingto the following customerapplication.

UTILIZATION AS A BIDIRECTIONAL TRANSIL

ARRAY WITH 4 I/Os.

Fig 5 : EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS

The main applicationof this device is to be configu-

rated as a 4, bidirectional Transil Array as per the

Pin-out of Fig 5.

I/O1 1

I/O2 2

I/O3 3

Pins 5 and 8 are connected to ground.

INPUTS/OUTPUTS are from Pin 1 to Pin 4.

8 GND

Note : Thebidirectionalfunctionis madewith2 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 connectedvia 2 diodes T2 and T3 .

Thisallows to withstand2 specifiedsurgeson 2 dif-

ferent lines at thesame time.

I/O4

GND

UTILIZATION AS A BIDIRECTIONAL TRANSIL

ARRAY WITH 5 I/Os.

Fig 6 : EQUIVALENT TO 5 BIDIRECTIONAL TRANSILS

The ITAxxC1 can be used as a 5 bidirectional

Transil Array.

Ground can be connectedto any pin (except6 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 shownin Fig 6.

This configuration allows to withstand only one

specified surge at the same time.

GND

I/O1 1

I/O2 2

I/O3

I/O4

5 I/O5

4/5

ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1

ORDER CODE

ITA 25 C 1

PACKAGE

INTEGRATED

TRANSIL ARRAY

1=SO8 PLASTIC

_BRmin

COMMON GROUND

MARKING

TYPE

ITA6V5C1

6V5C1

ITA10C1

10C1

ITA18C1

18C1

ITA25C1

25C1

MARKING

PACKAGE MECHANICAL DATA

SO8

DIMENSIONS

REF.

Millimetres

Inches

Min. Typ. Max. Min. Typ. Max.

1.75

0.069

0.010

0.065

0.019

0.010

0.1

0.25 0.004

1.65

0.35

0.48 0.014

0.25 0.007

b1 0.19

0.50

0.020

45°(typ)

4.8

5.8

5.0 0.189

6.2 0.228

0.197

0.244

1.27

3.81

0.050

0.150

3.8

0.4

4.0 0.15

1.27 0.016

0.6

0.157

0.050

0.024

Weight : 0.077g

8° (max)

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 publicationsupersedes and replaces all information previously supplied.

SGS-THOMSON Microelectronics products are not authorizedfor use as critical components in life support devices or systems without express

written approval of SGS-THOMSON Microelectronics.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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