1996 Nov 21

18

Philips Semiconductors

Product specification

DTMF/modem/musical-tone generators

PCD3311C; PCD3312C

Notes

resistance of 5.6 k

2. As note 1, but with oscillator OFF.

3. Related to the level of the LOW group frequency component, according to CEPT recommendations.

4. Related to the level of the fundamental frequency.

5. Oscillator must be running.

6. Values are referenced to the 10% and 90% levels of the relevant pulse amplitudes, with a total voltage swing from

TONE output (see test circuit, Fig.15)

DTMF output voltage (RMS), HIGH group

158

192

205

mV

DTMF output voltage (RMS), LOW group

125

150

160

mV

DC voltage level

−

1

−

V

voltage gain (pre-emphasis) of group

1.85

2.10

2.35

dB

THD

dual tone (note 3)

−−25

−

dB

modem tone (note 4)

−−29

−

dB

output impedance

−

0.1

0.5

k

Ω

OSCI input

maximum allowable amplitude at OSCI

−−

oscillator start-up time

−

3

−

ms

TONE start-up time (note 5)

−

0.5

−

ms

STROBE pulse width (note 6)

400

−−

ns

data set-up time (note 6)

150

−−

ns

data hold time (note 6)

100

−−

ns

SYMBOL

PARAMETER

MIN.

TYP

MAX.

UNIT

Fig.15 TONE output test circuit.

handbook, halfpage

MGG513

TONE

PCD3311C

PCD3312C

VDD

VSS

10 k

Ω

1

µF

50 pF