DS96173 Datasheet, PDF (3/6 Pages) National Semiconductor (TI) – RS-485/RS-422 Quad Differential Line Receivers

Switching Characteristics
V_CC = 5V, T_A = 25˚C
Symbol
Parameter
t_PLH
Propagation Delay Time,
Low to High Level Output
t_PHL
Propagation Delay Time,
High to Low Level Output
t_PZH
Output Enable Time to High Level
t_PZL
Output Enable Time to Low Level
t_PHZ
Output Disable Time from High Level
t_PLZ
Output Disable Time from Low Level
Conditions
V_ID = −2.5V to 2.5V,
C_L = 15 pF, Figure 1
C_L = 15 pF, Figure 2
C_L = 15 pF, Figure 3
C_L = 5 pF, Figure 2
C_L = 5 pF, Figure 3
Min
Typ
Max
Units
15
25
ns
15
25
ns
15
22
ns
15
22
ns
14
30
ns
24
40
ns
Function Tables
(Each Receiver) DS96173
Differential Inputs
A–B
V_ID > 0.2V
V_ID < −0.2V
X
X
H = High Level
L = Low Level
X = Immaterial
Z = High Impedance (off)
(Each Receiver) DS96175
Differential Inputs
A–B
V_ID ≥ 0.2V
V_ID ≤ −0.2V
X
Enables
E
E
H
X
X
L
H
X
X
L
L
X
X
H
Enable
H
H
L
Parameter Measurement Information
Outputs
V
H
H
L
L
Z
Z
Output
Y
H
L
Z
DS009628-3
FIGURE 1. t_PLH, t_PHL (Note 11)
DS009628-4
3
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