Absolute Maximum Ratings

If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

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15V

Maximum Voltage at Any Pin

Operating Temperature

b

Storage Temperature

b

Maximum Power Dissipation

500 mW

correlation with other production tests andor product design and characterization

Parameter

Conditions

Min

Typ

Max

Units

Minimum Supply Voltage for Keysense

2V

and MUTE Logic Functions

Minimum Operating Voltage

35

V

for generating tones

Operating Current

Mute open

2

25

m

A

Idle

11

25

mA

Generating Tones

Input Resistors

COLUMN and ROW (Pull-Up)

25

50

kX

SINGLE TONE INHIBIT (Pull-Down)

120

kX

TONE DISABLE (Pull-Up)

Input Low Level

V

Input High Level

V

MUTE OUT Sink Current

04

mA

(COLUMN and ROW Active)

MUTE Out Leakage Current

1

m

A

Output Amplitude

190

250

340

mVrms

Low Group

510

700

880

mVrms

Output Amplitude

270

340

470

mVrms

High Group

735

955

1265

mVrms

Mean Output DC Offset

13

V

46

V

High Group Pre-Emphasis

22

27

32

dB

Dual ToneTotal Harmonic Distortion Ratio

b

23

b

22

dB

1 MHz Bandwidth

Start-Up Time (to 90% Amplitude)

3

5

mS

Note 1

Note 2

2