SN75C185_16 Datasheet, PDF (6/18 Pages) Texas Instruments – LOW-POWER MULTIPLE DRIVERS AND RECEIVERS

SN75C185
LOW-POWER MULTIPLE DRIVERS AND RECEIVERS
SLLS065F – AUGUST 1989 – REVISED JANUARY 2000
RECEIVER SECTION
electrical characteristics over operating free-air temperature range, V_DD = 12 V, V_SS = –12 V,
V_CC = 5 V ±10% (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP† MAX UNIT
VIT+
Positive-going input threshhold
voltage
See Figure 5
1.6 2.1 2.55 V
VIT–
Negative-going input threshhold
voltage
See Figure 5
0.65
1 1.25 V
Vhys
Input hysteresis voltage
(VIT ₊ – VIT–)
600 1100
mV
VI = 0.75 V, IOH = – 20 µA, See Figure 5 and Note 8 3.5
VOH High-level output voltage
VI = 0.75 V,
IOH = – 1 mA,
See Figure 5
VCC = 4.5 V
VCC = 5 V
VCC = 5.5 V
2.8 4.4
V
3.8 4.9
4.3 5.4
VOL Low-level output voltage
VI = 3 V,
IOL = 3.2 mA, See Figure 5
0.17 0.4 V
IIH
High-level input current
VI = 3 V
VI = 25 V
0.43 0.55
3.6 4.6
1
mA
8.3
IIL
Low-level input current
VI = – 3 V
VI = – 25 V
– 0.43 – 0.55 – 1
mA
– 3.6 – 5.0 – 8.3
IOS(H) Short-circuit output at high level VI = 0.75 V, VO = 0,
See Figure 4
– 8 – 15 mA
IOS(L) Short-circuit output at low level
VI = VCC,
VO = VCC,
See Figure 4
13
25 mA
† _{All typical values are at TA = 25 °C.}
NOTE 8: If the inputs are left unconnected, the receiver interprets this as an input low, and the receiver outputs remain in the high state.
switching characteristics, V_DD = 12 V, V_SS = –12 V, V_CC = 5 V ±10%, T_A = 25°C (unless otherwise
noted) (see Figure 6)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
tPLH
tPHL
tTLH
tTHL
tw(N)
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Transition time, low- to high-level output
Transition time, high- to low-level output
Duration of longest pulse rejected as noise
(see Note 9)
RL = 5 kΩ, CL = 50 pF
RL = 5 kΩ, CL = 50 pF
3
4 µs
3
4 µs
300 450 ns
100 300 ns
1
4 µs
NOTE 9: The receiver ignores any postive- or negative-going pulse that is less than the minimum value of tw(N) and accepts any positive- or
negative-going pulse greater than the maximum of tw(N).
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