V CC1
(+5 V)
DATA
INPUT
TTL OR
LSTTL
TOTEM
POLE
OUTPUT
GATE
1
665 Ω
D.U.T.
VCC
VO
VE
GND
V CC2
(4.5 TO 20 V)
RL
DATA
OUTPUT
CMOS
V CC2
RL
5 V 1.1 K
10 V 2.37 K
2
15 V 3.83 K
20 V 5.11 K
Figure 10. LSTTL to CMOS Interface Circuit.
V CC1
(+5 V)
DATA
INPUT
TTL OR
LSTTL
TOTEM
POLE
OUTPUT
GATE
750 Ω
D.U.T.
V CC
GND
Figure 11. Recommended LED Drive Circuit.
V CC1
(+5 V)
619 Ω
D.U.T.
V CC
DATA
INPUT
4.02 KΩ
TTL OR
LSTTL
GND
OPEN
COLLECTOR
GATE
Figure 12. Series LED Drive with Open Collector Gate
(4.02 kΩ Resistor Shunts IOH from the LED).
V CC1
(+5 V)
665 Ω
DATA
INPUT
TTL OR
LSTTL
TOTEM
POLE
OUTPUT
GATE
DATA
INPUT
TTL OR
LSTTL
1
TOTEM
POLE
OUTPUT 1
GATE
665 Ω
D.U.T.
V CC
GND
0.1
µF
DATA
OUTPUT
UP TO 16 LSTTL
LOADS
OR 4 TTL LOADS
V CC2
(+5 V)
DATA
OUTPUT
UP TO 16 LSTTL
LOADS
OR 4 TTL LOADS
Figure 13. Recommended LSTTL to LSTTL Circuit.
2