Datasheet

  
  
SLLS094C − SEPTEMBER 1983 − REVISED MAY 2004
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
THERMAL INFORMATION
†
− Maximum Supply Voltage − V
MAXIMUM SUPPLY VOLTAGE
vs
FREE-AIR TEMPERATURE
R
L
≥ 3 kΩ (from each output to GND)
14
12
10
8
6
4
2
1007550250−25−50
0
125
16
T
A
− Free-Air Temperature − °C
−75
CC
V
Figure 6
†
Data for temperatures below 0°C and above 70°C are applicable to the SN55188 circuit only.
APPLICATION INFORMATION
Diodes placed in series with the V
CC+
and V
CC−
leads protect
the SN55188/SN75188 in the fault condition in which the device
outputs are shorted to ± 15 V, and the power supplies are at low
voltage and provide low-impedance paths to ground.
V
CC+
V
CC−
± 15 V
Output
V
CC+
V
CC−
’188’188
10 kΩ
1 kΩ
−10 V to 0 V
Output to MOS
or SN75188
1/4 SN55188
−0.7 V to 10 V
Output to HNIL
1/4 SN55188
or SN75188
−0.7 V to 5.7 V
Output to DTL
5 V
1/4 SN55188
or SN75188
or SN75188
1/4 SN55188
−0.7 V to 3.7 V
Output to RTL
3 V
−12 V
V
CC+
= 12 V
V
CC−
= −12 V
Input From
TTL or DTL
Figure 7. Logic Translator Applications
Figure 8. Power-Supply Protection to Meet
Power-Off Fault Conditions of
ANSI TIA/EIA-232-E