HC5503

FN4344 Rev 5.00

Page 15 of 17

June 2004

Overvoltage Protection and Longitudinal

Current Protection

The SLIC device, in conjunction with an external protection

bridge, will withstand high voltage lightning surges and power

line crosses.

High voltage surge conditions are as specified in Table 1.

The SLIC will withstand longitudinal currents up to a maximum

or 10mARMS, 5mARMS per leg, without any performance

degradation.

FIGURE 9. LOGIC NETWORK

Schematic Diagram (Continued)

LOGIC GATE SCHEMATIC

15

5

6

12

4

16

13

A

B

C

C

B

A

TTL

TO

STTL

TTL

TO

STTL

TTL

TO

STTL

TO

R21

SHD

RD

PD

RC

RS

TTL

TO

STTL

RELAY

DRIVER

SH

GK

11

14

9

7

8

10

2

1

SCHOTTKY LOGIC

TABLE 1.

PARAMETER

TEST

CONDITION

PERFORMANCE

(MAX)

UNITS

Longitudinal

Surge

10

s Rise/

1000

s Fall

450 (Plastic)

VPEAK

Metallic Surge

10

s Rise/

1000

s Fall

450 (Plastic)

VPEAK

T/GND

R/GND

10

s Rise/

1000

s Fall

450 (Plastic)

VPEAK

50/60Hz Current

T/GND

R/GND

11 Cycles

Limited to

10ARMS

315 (Plastic)

VRMS