11

Figure 13. Recommended LSTTL to LSTTL Circuit.

Figure 14. Single Channel Operating Circuit for Burn-in and Steady State Life Tests.

GND

VCC

VE

D.U.T.*

*ALL CHANNELS TESTED SIMULTANEOUSLY.

CONDITIONS: IF = 8 mA

VCC + 20 V

VIN

+–

IF

IO = -14 mA

0.01 µF

TA = +125 °C

1.90 V

100

Ω

IO

1200

Ω

GND

VCC

D.U.T.

619

Ω

VCC1

(+5 V)

OPEN

COLLECTOR

GATE

TTL OR

LSTTL

DATA

INPUT

4.02 K

Ω

Figure 12. Series LED Drive with Open Collector Gate

(4.02 k

GND

VCC

D.U.T.

665

Ω

VCC1

(+5 V)

TOTEM

POLE

OUTPUT

GATE

TTL OR

LSTTL

DATA

INPUT

TTL OR

LSTTL

DATA

INPUT

665

Ω

TOTEM

POLE

OUTPUT

GATE

1

1

2

0.1

µF

DATA

OUTPUT

VCC2

(+5 V)

DATA

OUTPUT

UP TO 16 LSTTL

LOADS

OR 4 TTL LOADS

UP TO 16 LSTTL

LOADS

OR 4 TTL LOADS