GD75323_16 Datasheet, PDF (7/19 Pages) Texas Instruments – MULTIPLE RS-232 DRIVERS AND RECEIVERS

GD75323
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS213A – JANUARY 1996 – REVISED JUNE 1999
PARAMETER MEASUREMENT INFORMATION
VDD
Input _VCC
Pulse
Generator
See Note B
RL
VSS
Input
1.5 V
VO
CL
(see Note A)
Output
90%
t _THL
t _PHL
50%
10%
1.5 V
50%
10%
3V
t _PLH
90%
0V
VOH
VOL
t _TLH
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf < 50 ns.
Figure 3. Driver Test Circuit and Voltage Waveforms
VDD
VCC
VI
– IOS
VSS
VDD
VCC
VIT, VI
VSS
VOL
VOH
IOL
– IOH
Figure 4. Receiver Test Circuit for I_OS
Pulse
Generator
See Note B
VDD
Input _VCC
RL
VSS
TEST CIRCUIT
Input
50%
VO
CL
(see Note A)
Output
90%
t _THL
Figure 5. Receiver Test Circuit
for V_IT, V_OH, and V_OL
50%
5V
–5 V
t _PHL
t _PLH
50%
10%
50%
10%
VOLTAGE WAVEFORMS
90%
VOH
t _TLH
VOL
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf < 50 ns.
Figure 6. Receiver Propagation and Transition Times
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