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Logic Diagram

HC-5502B LOGIC GATE SCHEMATIC

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 30mARMS, 15mARMS per leg, without any

performance degradation.

RELAY

DRIVER

GKD

SHD

RD

C2

PD

RC

RS

15

DELAY

LOGIC BIAS

A

B

C

A

B

C

TTL

TO

STTL

TO

GK

SH

SCHOTTKY LOGIC

TTL

TO

STTL

TTL

TO

STTL

TTL

TO

STTL

TTL

TO

STTL

1

2

16

4

5

6

7

8

9

12

3

13

14

11

15

10

TABLE 1.

PARAMETER

TEST

CONDITION

PERFORMANCE

(MAX)

UNITS

Longitudinal

Surge

10

µs Rise/

±1000 (Plastic)

1000

µs Fall

±500 (Ceramic)

Metallic Surge

10

µs Rise/

±1000 (Plastic)

1000

µs Fall

±500 (Ceramic)

T/GND

10

µs Rise/

±1000 (Plastic)

R/GND

1000

µs Fall

±500 (Ceramic)

50/60Hz Current

T/GND

11 Cycles

700 (Plastic)

R/GND

Limited to

350 (Ceramic)

HC-5502B