DS14185WM datasheet(3/8 Pages) NSC

3 / 8 page

Electrical Characteristics (Note 2) (Continued)

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

Symbol

Parameter

Conditions

Min

Typ

Max

Units

RECEIVER CHARACTERISTICS

Input High Threshold

O ≤ 0.4V, IO = 3.2 mA

1.85

2.4

(Recognized as a High Signal)

Input Low Threshold

O ≥ 2.5V, IO = −0.5 mA

0.7

1.0

(Recognized as a Low Signal)

Input Resistance

IN = ±3V to ±15V

3.0

4.1

7.0

Ω

Input Current (Note 2)

IN = +15V

2.1

4.1

5.0

IN = +3V

0.43

0.7

IN = −15V

−5.0

−4.1

−2.1

IN = −3V

−1

−0.65

−0.43

High Level Output Voltage

OH = −0.5 mA, VIN = −3V

2.6

(Note 7)

OH = −10 µA, VIN = −3V

4.0

4.9

OH = −0.5 mA, VIN = Open Circuit

2.6

OH = −10 µA, VIN = Open Circuit

4.0

4.9

Low Level Output Voltage

OL = 3.2 mA, VIN = +3V

0.2

0.4

OSR

Short Circuit Current (Note 2)

O = 0V, VIN = 0V

−4

−2.7

−1.7

Switching Characteristics (Note 2)

A = 25˚C

Symbol

Parameter

Conditions

Min

Typ

Max

Units

DRIVER CHARACTERISTICS

PHL

Propagation Delay High to Low

L = 3kΩ,CL = 50 pF

(

Figures 1, 2)

350

PLH

Propagation Delay Low to High

240

350

r,tf

Output Slew Rate (Note 8)

RECEIVER CHARACTERISTICS

PHL

Propagation Delay High to Low

L = 1.5 kΩ,CL = 15 pF

(includes fixture plus probe),

(

Figures 3, 4)

150

350

PLH

Propagation Delay Low to High

240

350

Rise Time

175

Fall Time

100

Note 1: Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices

should be operated at these limits. The table of Electrical Characteristics specifies conditions of device operation.

Note 2: 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 speci-

fied. For current, minimum and maximum values are specified as an absolute value and the sign is used to indicate direction. For voltage logic levels, the more posi-

tive value is designated as maximum. For example, if −6V is a maximum, the typical value (−6.8V) is more negative.

Note 3: All typicals are given for: VCC = +5.0V, V

+ = +12.0V, V− = −12V, T

A = +25˚C.

Note 4: Only one driver output shorted at a time.

Note 5: Generator characteristics for driver input: f = 64 kHz (128 kbits/sec), tr = tf < 10 ns, VIH = 3V, VIL = 0V, duty cycle = 50%.

Note 6: Generator characteristics for receiver input: f = 64 kHz (128 kbits/sec), tr = tf = 200 ns, VIH = 3V, VIL = −3V, duty cycle = 50%.

Note 7: If receiver inputs are unconnected, receiver output is a logic high.

Note 8: Refer to typical curves. Driver output slew rate is measured from the +3.0V to the −3.0V level on the output waveform. Inputs not under test are connected

to VCC or GND. Slew rate is determined by load capacitance. To comply with a 30 V/µs maximum slew rate, a minimum load capacitance of 390 pF is recommended.

DS14185WM Datasheet(PDF) 3 Page - National Semiconductor (TI)

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