Datasheet

SN75140
DUAL LINE RECEIVER
SLLS080C – JANUARY 1977 – REVISED APRIL 1998
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
VO – Output Voltage – V
V
I
– Input Voltage – VV
I
– Input Voltage – V
VO – Output Voltage – VV
O
V
O
R1 = 5.9 kΩ
R
T
= 3.9 kΩ
R
F
= 5 kΩ
T
A
= 25°C
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
R1 = 6.2 kΩ
R
T
= 3.9 kΩ
R
F
= 16 kΩ
T
A
= 25°C
4
3
1
2
0
0 0.5 1 1.5 2 32.5
0.5
1.5
2.5
3.5
4
3
1
2
0
0 0.5 1 1.5 2 32.5
0.5
1.5
2.5
3.5
NOTE A: Slowly changing input levels from data lines, optical detectors, and other types of transducers can be converted to standard TTL
signals with this Schmitt-trigger circuit. R
1
, R
F
, and R
T
can be adjusted for the desired hysteresis and trigger levels.
Figure 7. Examples of Transfer Characteristics
COMSTRB
OUT
t
w
COMSTRB
V
CC
V
ref
C
OUT
R
F
R
SN75140
Figure 8. Gated Oscillator