PCD3349 datasheet(11/20 Pages) PHILIPS

11 / 20 page

1998 May 11

Philips Semiconductors

Product speciﬁcation

8-bit microcontroller with DTMF generator

PCD3349A

Notes

1. TONE output requires VDD ≥ 2.5 V.

2. VIL =VSS; VIH =VDD; open-drain outputs connected to VSS; all other outputs open; value HGF = LGF = 0, unless

otherwise specified.

3. Crystal connected between XTAL1 and XTAL2; pins T1 and CE/T0 at VSS; value HGF = LGF = 0.

4. Values are specified for DTMF frequencies only (CEPT).

5. Related to the Low Group Frequency (LGF) component (CEPT).

6. VPOR is an option chosen by the user. Depending on its value, it may restrict the supply voltage range.

Inputs

VIL

LOW-level input voltage

−

0.3VDD V

VIH

HIGH-level input voltage

0.7VDD −

VDD

IIL

input leakage current

VSS ≤ VI ≤ VDD

−1

−

µA

Port outputs (see Figs 10 to 12)

IOL

LOW-level port sink

current

VDD = 3 V; VO = 0.4 V

0.7

3.5

−

IOH

HIGH-level port pull-up

source current

VO = 2.7 V; VDD =3V

−10

−20

−µA

VO =0V; VDD =3V

−−100

−300

µA

IOH

HIGH-level port push-pull

source current

VDD = 3 V; VO = 2.6 V

−0.7

−4

−

TONE output (see Fig.4; notes 1 and 4)

VHGrms

HGF voltage (RMS)

158

181

205

VLGrms

LGF voltage (RMS)

125

142

160

frequency deviation

−0.6

−

0.6

VDC

DC voltage level

−

0.5VDD −

Z

O

output impedance

−

100

500

Ω

pre-emphasis of group

1.5

2.0

2.5

THD

total harmonic distortion

Tamb =25 °C; note 5

−

Power-on-reset

∆VPOR

Power-on-reset level

variation around chosen

VPOR

note 6

−0.5

+0.5

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

∆ f

⁄

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