Datasheet

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RECEIVER SECTION
Switching Characteristics
SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS181D–DECEMBER 1994 – REVISED JANUARY 2006
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Electrical Characteristics
over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
(1)
MAX UNIT
T
A
=25°C 1.75 1.9 2.3
V
T+
Positive-going threshold voltage See Figure 5 V
T
A
=0°Cto70°C 1.55 2.3
V
T–
Negative-going threshold voltage 0.75 0.97 1.25 V
V
hys
Input hysteresis (V
T+
–V
T–
) 0.5 V
V
IH
=0.75V 2.6 4 5
V
OH
High-level output voltage I
OH
= –0.5 mA V
Inputs open 2.6
V
OL
Low-level input voltage I
OL
= 10 mA, V
I
= 3 V 0.2 0.45 V
V
I
= 25 V, See Figure 5 3.6 8.3
I
IH
High-level input current mA
V
I
= 3 V, See Figure 5 0.43
V
I
= –25 V, See Figure 5 –3.6 –8.3
I
IL
Low-level output current mA
V
I
= –3 V, See Figure 5 –0.43
I
OS
Short-circuit output current See Figure 4 –3.4 –12 mA
(1) All typical values are at T
A
=25°C, V
CC
= 5 V, V
DD
= 9 V, and V
SS
=–9V.
V
CC
= 5 V, V
DD
=12V,V
SS
= -12 V, T
A
=25°C (see Figure 6)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
PLH
Propagation delay time, low- to high-level output C
L
=50pF, R
L
=5kΩ 107 500 ns
t
PHL
Propagation delay time, high- to low-level output C
L
=50pF, R
L
=5kΩ 42 150 ns
t
TLH
Transition time, low- to high-level output C
L
=50pF, R
L
=5kΩ 175 525 ns
t
THL
Transition time, high- to low-level output C
L
=50pF, R
L
=5kΩ 16 60 ns
7