PCD3312 datasheet(18/28 Pages) PHILIPS

18 / 28 page

1996 Nov 21

Philips Semiconductors

Product speciﬁcation

DTMF/modem/musical-tone generators

PCD3311C; PCD3312C

Notes

1. Oscillator ON; VDD = 3 V; crystal connected between OSCI and OSCO; D0/SCL and D1/SDA connected via

resistance of 5.6 k

Ω to VDD; all other pins left open.

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

VSS to VDD.

TONE output (see test circuit, Fig.15)

VHG(RMS)

DTMF output voltage (RMS), HIGH group

158

192

205

VLG(RMS)

DTMF output voltage (RMS), LOW group

125

150

160

VDC

DC voltage level

−

⁄2 VDD

−

voltage gain (pre-emphasis) of group

1.85

2.10

2.35

THD

Total Harmonic Distortion; Tamb =25 °C

dual tone (note 3)

−−25

−

modem tone (note 4)

−−29

−

Zo

output impedance

−

0.1

0.5

Ω

OSCI input

VOSC(p-p)

maximum allowable amplitude at OSCI

−−

VDD − VSS V

Timing (VDD =3V)

tOSC(ON)

oscillator start-up time

−

tTONE(ON)

TONE start-up time (note 5)

−

0.5

−

tSPW

STROBE pulse width (note 6)

400

−−

tDS

data set-up time (note 6)

150

−−

tDH

data hold time (note 6)

100

−−

SYMBOL

PARAMETER

MIN.

TYP

MAX.

UNIT

Fig.15 TONE output test circuit.

handbook, halfpage

MGG513

TONE

PCD3311C

PCD3312C

VDD

VSS

10 k

Ω

µF

50 pF

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