HD26LS31 Datasheet, PDF (11/15 Pages) Hitachi Semiconductor – Quadruple Differential Line Drivers With 3 State Outputs

"H"
I_OH
Y
R_T
"L"
R_T
Z
I_IN (Receiver)
R_T =
Z_O
2
Z_O is the transmission line characteristic
impedance
HD26LS31
Figure 5 Example of Driver Use-1
5
V_{OH (Y)}
2
1.0
Y
0.5
"H"
0.2
V_{OL (Z)}
Z
0.1
0.05
10 20
50 100 200 500 1 k 2 k 5 k 10 k 20 k 50 k
Termination Resistance R_T (Ω)
V_CC = 5 V
Ta = 25°C
R_T
R_T
V_OH
GND ^VOL
Figure 6 Termination Resistance vs. Output Voltage Characteristics
Y
"H"
I_OH
R_T
"L"
Z
I_OL
I_IN (Receiver)
R_T = Z_O
Z_O is the transmission line characteristic
impedance
Figure 7 Example of Driver Use-2
11