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75185-S20-T

MULTIPLE RS-232 DRIVERS AND RECEIVERS

Unisonic Technologies 

75185

LINEAR INTEGRATED CIRCUIT

„ DRIVER ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING

FREE-AIR TEMPERATURE RANGE (VDD=9V, VSS=-9V, VCC=5V, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

High Level Output Voltage

Low Level Output Voltage (Note 3)

VOH VIL =0.8V, RL =3 kΩ (Figure 1)

VOL VIH =1.9V, RL =3 kΩ (Figure 1)

6 7.5

V

-7.5 -6 V

High Level Input Current

IIH VIN =5V (Figure 2)

10 μA

Low Level Input Current

IIL VIN =0V (Figure 2)

-1.6 mA

High Level Short Circuit Output Current

(Note 4)

IOS(H) VIL =0.8V, VOUT =0V(Figure 1)

-4.5 -12 -19.5 mA

Low Level Short Circuit Output Current

Output Resistance (Note 5)

IOS(L) VIH =2V, VOUT =0V(Figure 1)

4.5 12 19.5 mA

ROUT VDD =VSS=VCC=0V, VOUT =-2 to 2V 300

Ω

Note 3: The algebraic convention, where the more positive (less negative) limit is designated as maximum, is used in

this datasheet for logic levels only (e.g. if -10V is a maximum, the typical value is a more negative voltage).

Note 4: Output short circuit conditions must maintain the total power dissipation below absolute maximum ratings.

Note 5: Test conditions are those specified by TIA/EIA232-F and as listed above.

„ DRIVER SWITCHING CHARACTERISTICS (VDD=12V, VSS=-12V, VCC=5V, TA=25°C)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

Propagation Delay Time Level Low to High

Output

High to Low

tPLH RL=3 to 7 kΩ, CL=15pF (Figure 3)

tPHL RL=3 to 7 kΩ, CL=15pF (Figure 3)

315 500 ns

75 175 ns

RL=3 to 7 kΩ, CL=15pF (Figure 3)

60 100 ns

Transition Time Level Output Low to High

tTLH RL=3 to 7 kΩ, CL=2500pF

(Note 6,Figure 3)

1.7 2.5 μs

Transition Time Level Output High to Low

RL=3 to 7 kΩ, CL=15pF (Figure 3)

tTHL RL=3 to 7 kΩ, CL=2500pF

(Note 7, Figure 3)

40 75 ns

1.5 2.5 μs

Note 6: Measured between -3V and 3V points of the output waveform (TIA/EIA-232-F conditions), all unused inputs

are tied.

Note 7: Measured between 3V and -3V points of the output waveform (TIA/EIA-232-F conditions), all unused inputs

are tied.

„ RECEIVER ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING

CONDITIONS (TA=25°C, VCC=5V, VDD=9V, VSS=-9V)

PARAMETER

SYMBOL TEST CONDITIONS

MIN TYP MAX UNIT

(Figure 5)

Positive Going Threshold Voltage

VT+ TA=25°C

1.75 1.9 2.3

V

TA=0°C to 70°C

1.55

2.3

Negative Going Threshold Voltage

VT-

0.75 0.97 1.25 V

Input Hysteresis (VT+ - VT-)

VHYS

0.5

V

Output Voltage

High level

VOH

IOH=-0.5mA

VIH=0.75V

Inputs Open

2.6

2.6

4

5

V

Input Current

Low level

High level

Low level

VOL VIN=3V, IOL=10mA

IIH

VIN=25V (Figure 5)

VIN=3V (Figure 5)

IIL

VIN=-25V (Figure 5)

VIN=-3V (Figure 5)

0.2 0.45 V

3.6

8.3

mA

0.43

-3.6

-0.43

-8.3 mA

Short-Circuit Output Current

IOS (Figure 4)

-3.4 -12 mA

„ RECEIVER SWITCHING CHARACTERISTICS (VDD=12V, VSS=-12V, VCC=5V, TA=25°C)

PARAMETER

SYMBOL TEST CONDITIONS

MIN TYP MAX

Propagation Delay Time Low to High tPLH RL=5 kΩ, CL=50pF

107 500

Level Output

High to Low tPHL (Figure 6)

42 150

Transition Time Level

Low to High tTLH

175 525

Output

High to Low tTHL

16

60

UNIT

ns

ns

ns

ns

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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QW-R113-003,F

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