Call Progress Tone Detector

MX643 - Preliminary Information

© 1996 MX•COM, INC.

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Doc. #20480148.001

8

Operating Characteristics

For the following conditions unless otherwise specified:

Xtal Frequency = 3.579545MHz, S/N = 16 dB, Noise Bandwidth = 5 kHz,

Notes

Min.

Typ.

Max.

Units

DC Parameters

Supply Current

1

0.5

1.0

mA

1

0.3

0.7

mA

Enable Input

Input Logic 1 Level

2

80%

Input Logic 0 Level

2

20%

2

-5.0

5.0

µA

Input Capacitance

2

10.0

pF

Detect Output

3

90%

3

10%

AC Parameters

SIGIN pin

Input Impedance (at 100Hz)

4

350

k

Ω

Input Signal Level

5

-40

dB

Input Signal Dynamic Range

5

40

dB

Signal to Noise Ratio

16

dB

Clock Input

'High' Pulse Width

6

40

ns

'Low' Pulse Width

6

40

ns

Input Impedance (at 100Hz)

10

M

Ω

20

dB

Operating Characteristics Notes:

1. Not including any current drawn from the device pins by external circuitry.

2. ENABLE pin.

3. DETECT1, DETECT2 and DETECT3 pins.

4. Small signal impedance.

5. The input level is not critical as the detector uses a stochastic algorithm.

6. Timing for an external input to the CLOCK pin.