SN75LBC978 Datasheet, PDF (7/16 Pages) Texas Instruments – 9-CHANNEL DIFFERENTIAL TRANSCEIVER

SN75LBC978
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS134E – APRIL 1992 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
– IIH
or ^VIH
– IIL ^or
VIL
B+
A
B–
CE and
DE/RE at 2 V,
WRAP1 and
WRAP2 at 0.8 V
(see Note A)
VOD
VO,
VOH,
or
VOL
– IOH, – IOL, – IOS,
or
– IOZ
NOTE A: For the IOZ test, the CE input is at 0.8 V.
Figure 3. Driver Test and Input Conditions
GND
R1 = 165 Ω
Input
(see Note A)
A
CE and
DE/RE at VCC
RL = 75 Ω
R2 = 165 Ω
5V
50 pF†
B+
Output
B–
50 pF†
Input
td(ODH)
TEST CIRCUIT
3V
1.5 V
0V
td(ODL)
Output
10%
90%
90%
0V
10%
tr
tf
VOLTAGE WAVEFORMS
† _{Includes probe and jig capacitance.}
NOTE A: The input is provided by a pulse generator with an output of 0 to 3 V, PRR of 1 MHz, 50% duty cycle,
tr and tf < 6 ns, and ZO = 50 Ω.
Figure 4. Driver Propagation Delay Time Test Circuit and Waveforms
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