DS89C21

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SNLS091C – JUNE 1998 – REVISED APRIL 2013

Electrical Characteristics

(1) (2)

Over recommended supply voltage and operating temperature ranges, unless otherwise specified.

Symbol

Parameter

Conditions

Pin

Min

Typ

Max

Units

DRIVER CHARACTERISTICS

VIH

Input Voltage HIGH

2.0

VCC

V

VIL

Input Voltage LOW

DI

GND

0.8

V

IIH, IIL

Input Current

V IN = VCC, GND, 2.0V, 0.8V

0.05

±10

μA

VCL

Input Clamp Voltage

I IN = −18 mA

−1.5

V

VOD1

Unloaded Output Voltage

No Load

DO,

4.2

6.0

V

DO*

VOD2

Differential Output Voltage

R L = 100Ω

2.0

3.0

V

ΔVOD2

Change in Magnitude of V OD2

5.0

400

mV

for Complementary Output States

VOD3

Differential Output Voltage

R L = 150Ω

2.1

3.1

V

VOD4

Differential Output Voltage

R L = 3.9 kΩ

4.0

6.0

V

VOC

Common Mode Voltage

R L = 100Ω

2.0

3.0

V

ΔVOC

Change in Magnitude of V OC

2.0

400

mV

for Complementary Output States

IOSD

Output Short Circuit Current

V OUT = 0V

−30

−115

−150

mA

IOFF

Output Leakage Current

VCC = 0V

VOUT = +6V

0.03

+100

μA

VOUT = −0.25V

−0.08

−100

μA

RECEIVER CHARACTERISTICS

VTL, VTH

Differential Thresholds

V IN = +7V, 0V, −7V

RI,

−200

±25

+200

mV

RI*

VHYS

Hysteresis

V CM = 0V

20

50

mV

RIN

Input Impedance

V IN = −7V, +7V, Other = 0V

5.0

9.5

k

Ω

IIN

Input Current

Other Input = 0V,

VIN = +10V

+1.0

+1.5

mA

VCC = 5.5V and

VIN = +3.0V

0

+0.22

mA

VCC = 0V

VIN = +0.5V

−0.04

mA

VIN = −3V

0

−0.41

mA

VIN = −10V

−1.25

−2.5

mA

VOH

Output HIGH Voltage

IOH = −6 mA

VDIFF = +1V

RO

3.8

4.9

V

VDIFF = OPEN

3.8

4.9

V

VOL

Output LOW Voltage

I OL = +6 mA, VDIFF = −1V

0.08

0.3

V

IOSR

Output Short Circuit Current

V OUT = 0V

−25

−85

−150

mA

DRIVER AND RECEIVER CHARACTERISTICS

ICC

Supply Current

No Load

DI = VCC or GND

VCC

3.0

6

mA

DI = 2.4V or 0.5V

3.8

12

mA

(1)

Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground

unless otherwise specified.

(2)

All typicals are given for VCC = 5.0V and T A = 25°C.

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