ST75185C Electrical characteristics
Doc ID 6228 Rev 18 7/22
VDD = 9 V, VSS = -9 V, VCC = 5 V, unless otherwise specified.
Note: 1 The algebraic convention, where the more positive (less negative) limits designated as
maximum, is used in this datasheet for logic levels only (e.g. if - 10 V is a maximum, the
typical value is a more negative voltage).
2 Output short circuit conditions must maintain the total power dissipation below absolute
maximum ratings.
3 Test conditions are those specified by EIA-232-E and as listed above.
VDD = 12 V, VSS = -12 V, VCC = 5 V, TA = 25 °C
4 Measured between -3 V and 3 V points of output waveform (EIA-232-E conditions), all
unused inputs are tied.
Table 8. Driver electrical characteristics over operating free-air temperature range
Symbol Parameter Test conditions
Value
Unit
Min. Typ. Max.
VOH High level output voltage VIL = 0.8 V, RL = 3kΩ
(See Figure 3)67.5 V
VOL
Low level output voltage
(Note 3)
VIH = 1.9 V, RL = 3kΩ
(See Figure 3)-7.5 -6 V
IIH High level input current VI = 5 V (See Figure 4)10µA
IIL Low level input current VI = 0 V (See Figure 4)−1.6 mA
IOS(H)
High level short circuit
output current (Note 4)
VIL = 0.8 V, VO = 0 V
(See Figure 3)-4.5 −12 −19.5 mA
IOS(L)
Low level short circuit output
current
VIH = 2 V VO = 0 V
(See Figure 3)4.5 12 19.5 mA
ROOutput resistance VDD = VSS = VCC = 0 V
VO = -2 to 2 V (Note 3)300 Ω
Table 9. Driver switching characteristics
Symbol Parameter Test conditions
Value
Unit
Min. Typ. Max.
tPLH
Propagation Delay Time, Low to
High Level Output
RL = 3 to 7 kΩ CL = 15 pF
(See Figure 5, Figure 6)315 500 ns
tPHL
Propagation Delay Time, High to
Low Level Output
RL = 3 to 7 kΩ CL = 15 pF
(See Figure 5, Figure 6)75 175 ns
tTLH
Transition Time Low to High Level
Output
RL = 3 to 7 kΩ CL = 15 pF
(See Figure 5, Figure 6)60 100 ns
RL = 3 to 7 kΩ CL = 2500 pF
(Note 4, Figure 5, Figure 6)1.7 2.5 µs
tTHL
Transition Time High to Low Level
Output
RL = 3 to 7 kΩ CL = 15 pF
(See Figure 5, Figure 6)40 7.5 ns
RL = 3 to 7 kΩ CL = 2500 pF
(Note 4, Figure 5, Figure 6)1.5 2.5 µs