If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

OfficeDistributors for availability and specifications

b

a

g

20 mA

g

25 mA

g

50 mA

b

(Note 3)

600 mW

SO Package only

500 mW

(Soldering 10 seconds)

260 C

Operating Conditions

Min

Max

Units

45

55

V

b

45

b

55

V

DC Input or Output Voltage

0

V

MM74HC

b

40

a

85

C

Input Rise or Fall Times

500

ns

Crystal frequency

3579

MHz

DC Electrical Characteristics

74HC

Symbol

Parameter

Conditions

Units

Typ

Guaranteed Limits

Minimum High Level

315

315

V

Input Voltage

Maximum Low Level

11

11

V

Input Voltage

Minimum High Level

Output Voltage

V

398

37

V

Maximum Low Level

Voltage

01

01

V

026

04

V

Maximum Input

g

01

g

10

m

A

Current

Output TRI-STATE

g

5

m

A

Leakage Current

RXD and CD Outputs

Maximum Quiescent

80

120

120

mA

Supply Current

Power Down Supply Current

300

m

A

Note 1

Absolute Maximum Ratings are those values beyond which damage to the device may occur

Note 2

Unless otherwise specified all voltages are referenced to ground

Note 3

Power Dissipation temperature derating

The demodulator specifications apply to the MM74HC942 operating with a modulator having frequency accuracy phase jitter and harmonic content equal to or

better than the MM74HC942 modulator

2