SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
SLLS067G − AUGUST 1990 − REVISED APRIL 2006
PARAMETER MEASUREMENT INFORMATION
375
Ω
RL
VOD2
2
RL
2
VOC
375
Ω
VOD3
60
Ω
Vtest
Figure 1. Driver V
OD
and V
OC
Figure 2. Driver V
OD3
3V
Input
CL = 50 pF
(see Note B)
Output
td(ODH)
50%
90%
10%
1.5 V
1.5 V
0V
td(ODL)
≈
2.5 V
50%
Generator
(see Note A)
50
Ω
3V
RL = 54
Ω
Output
tt(OD)
TEST CIRCUIT
≈
− 2.5 V
tt(OD)
VOLTAGE WAVEFORMS
Figure 3. Driver Test Circuit and Voltage Waveforms
Output
S1
0 V or 3 V
CL = 50 pF
(see Note B)
RL = 110
Ω
Output
tPZH
2.3 V
tPHZ
VOLTAGE WAVEFORMS
Input
1.5 V
1.5 V
0V
0.5 V
VOH
Voff
≈
0 V
3V
Generator
(see Note A)
50
Ω
TEST CIRCUIT
Figure 4. Driver Test Circuit and Voltage Waveforms
5V
RL = 110
Ω
Output
tPZL
CL = 50 pF
(see Note B)
Output
2.3 V
Input
1.5 V
1.5 V
0V
tPLZ
5V
0.5 V
VOL
TEST CIRCUIT
VOLTAGE WAVEFORMS
3V
S1
3 V or 0 V
Generator
(see Note A)
50
Ω
Figure 5. Driver Test Circuit and Voltage Waveforms
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR
≤
1 MHz, 50% duty cycle, tr
≤
6 ns, tf
≤
6 ns,
ZO = 50
Ω.
B. CL includes probe and jig capacitance.
8
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