Philips PCD3311CP, PCD3311CT, PCD3312CP, PCD3312CT Datasheet

INTEGRATED CIRCUITS

DATA SH EET

PCD3311C; PCD3312C

DTMF/modem/musical-tone generators

Product speciﬁcation Supersedes data of May 1990 File under Integrated Circuits, IC03

1996 Nov 21

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

CONTENTS

1 FEATURES 2 GENERAL DESCRIPTION 3 QUICK REFERENCE DATA 4 ORDERING INFORMATION 5 BLOCK DIAGRAM 6 PINNING INFORMATION

6.1 Pinning PCD3311CP

6.2 Pin description PCD3311CP

6.3 Pinning PCD3311CT

6.4 Pin description PCD3311CT

6.5 Pinning PCD3312C

6.6 Pin description PCD3312C 7 FUNCTIONAL DESCRIPTION

7.1 General

7.2 Clock/oscillator connection

7.3 Mode selection (PCD3311C)

7.4 Data inputs (PCD3311C)

7.5 Strobe input (PCD3311C )

7.6 I2C-bus clock and data inputs

7.7 Address input

7.8 I2C-bus data configuration

7.9 Tone output

7.10 Power-on reset

7.11 Tables of Input and output 8I

8.1 Bit transfer

8.2 Start and stop conditions

8.3 System configuration

8.4 Acknowledge

8.5 Timing specifications

8.5.1 Standard mode

8.5.2 Low-speed mode 9 HANDLING 10 LIMITING VALUES 11 CHARACTERISTICS 12 APPLICATION INFORMATION 13 PACKAGE OUTLINES 14 SOLDERING

14.1 Introduction

14.2 DIP

14.2.1 Soldering by dipping or by wave

14.2.2 Repairing soldered joints

14.3 SO

14.3.1 Reflow soldering

14.3.2 Wave soldering

14.3.3 Repairing soldered joints

C-BUS INTERFACE

15 DEFINITIONS 16 LIFE SUPPORT APPLICATIONS 17 PURCHASE OF PHILIPS I2C COMPONENTS

1996 Nov 21 2

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

1 FEATURES

• DTMF, modem and musical tone generation

• Stabilized output voltage level

• Low output distortion with on-chip filtering conforming to

CEPT recommendations

• Latched inputs for data bus applications

• I2C-bus compatible

• Selection of parallel or serial (I2C-bus) data input

(PCD3311C).

used, and a separate microcontroller is required to control the devices.

Both the devices can interface to I

C-bus compatible microcontrollers for serial input. The PCD3311C can also interface directly to all standard microcontrollers, accepting a binary coded parallel input.

With their on-chip voltage reference the PCD3311C and PCD3312C provide constant output amplitudes which are independent of the operating supply voltage and ambient temperature.

An on-chip filtering system assures a very low total

2 GENERAL DESCRIPTION

The PCD3311C and PCD3312C are single-chip silicon gate CMOS integrated circuits. They are intended principally for use in telephone sets to provide the dual-tone multi-frequency (DTMF) combinations required for tone dialling systems. The various audio output frequencies are generated from an on-chip 3.58 MHz quartz crystal-controlled oscillator. A separate crystal is

harmonic distortion in accordance with CEPT recommendations.

In addition to the standard DTMF frequencies the devices can also provide:

• Twelve standard frequencies used in simplex modem

applications for data rates from 300 to 1200 bits per second

• Two octaves of musical scales in steps of semitones.

3 QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

stb

HG(RMS)

LG(RMS)

operating supply voltage 2.5 − 6.0 V operating supply current −−0.9 mA standby current −−3µA DTMF HIGH group output voltage level (RMS value) 158 192 205 mV DTMF LOW group output voltage level (RMS value) 125 150 160 mV

pre-emphasis (voltage gain) of group 1.85 2.10 2.35 dB THD total harmonic distortion −−25 − dB T

amb

operating ambient temperature −25 − +70 °C

4 ORDERING INFORMATION

PACKAGE

TYPE NUMBER

NAME DESCRIPTION VERSION

PCD3311CP DIP14 plastic dual in-line package; 14 leads (300 mil) SOT27-1 PCD3311CT SO16 plastic small outline package; 16 leads; body width 7.5 mm SOT162-1 PCD3312CP DIP8 plastic dual in-line package; 8 leads (300 mil) SOT97-1 PCD3312CT SO8 plastic small outline package; 8 leads; body width 7.5 mm SOT176-1

1996 Nov 21 3

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

5 BLOCK DIAGRAM

handbook, full pagewidth

D5 D4 D3 D2

4 12 11 10

9(8) 8(7)

MODE

D1/SDA D0/SCL

STROBE

The un-parenthesised numbers are for the PCD3311CP, those in parenthesis for the PCD3312C.

OSCI OSCO

OSCILLATOR

INPUT

CONTROL

LOGIC

1(3)

7(6)

2(4)

GENERATOR

HIGH

GROUP

DIVIDER

DIVIDER

SELECTION

(ROM)

LOW

GROUP

DIVIDER

CLOCK

SWITCHED

CAPACITOR

BANDGAP

VOLTAGE

REFERENCE

ADDER

Fig.1 Block diagram.

DAC

HIGH

DAC

LOW

14(2) 13(1)

SWITCHED

CAPACITOR

PCD3311C PCD3312C

RESISTOR

CAPACITOR

MGG543

(5)6

TONE

6 PINNING INFORMATION

6.1 Pinning PCD3311CP

handbook, halfpage

OSCI OSCO MODE

STROBE

TONE

1 2 3 4

PCD3311CP

5 6 7

Fig.2 Pin configuration PCD3311CP.

MGG508

14 13 12 11 10

9 8

D4 D3 D2 D1/SDA D0/SCL

6.2 Pin description PCD3311CP

SYMBOL PIN TYPE DESCRIPTION

OSCI 1 I oscillator input OSCO 2 O oscillator output MODE 3 I mode select input (selects

C or parallel data input)

I D5 4 I parallel data input STROBE 5 I strobe input (for loading

data in parallel mode) TONE 6 O frequency output (DTMF,

modem, musical tones) A0 7 I slave address input (to be

connected to V

or VSS)

D0/SCL 8 I parallel data input or

C-bus clock line

I D1/SDA 9 I parallel data input or

C-bus data line

I D2 − D4 10 − 12 I parallel data inputs V

13 P negative supply 14 P positive supply

1996 Nov 21 4

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

6.3 Pinning PCD3311CT

handbook, halfpage

OSCI

OSCO

MODE

n.c.

STROBE

TONE

1 2 3 4

PCD3311CT

5 6 7 8

Fig.3 Pin configuration PCD3311CT.

MGG509

16 15 14 13 12 11 10

n.c. D3 D2 D1/SDA D0/SCL

6.4 Pin description PCD3311CT SYMBOL PIN TYPE DESCRIPTION

OSCI 1 I oscillator input OSCO 2 O oscillator output MODE 3 I mode select input (selects

C or parallel data input)

I D5 4 I parallel data input n.c. 5 − not connected STROBE 6 I strobe input (for loading

data in parallel mode) TONE 7 O frequency output (DTMF,

modem, musical tones) A0 8 I slave address input (to be

connected to V

or VSS)

D0/SCL 9 I parallel data input or

C-bus clock line

I D1/SDA 10 I parallel data input or

C-bus data line

I D2, D3 11, 12 I parallel data inputs n.c. 13 − not connected D4 14 I parallel data input V

15 P negative supply 16 P positive supply

6.5 Pinning PCD3312C

handbook, halfpage

OSCI

OSCO

1 2

PCD3312C

3 4

Fig.4 Pin configuration PCD3312C.

MGG510

6.6 Pin description PCD3312C SYMBOL PIN TYPE DESCRIPTION

1 P negative supply

2 P positive supply OSCI 3 I oscillator input OSCO 4 O oscillator output

SDA

SCL

TONE

TONE 5 O frequency output (DTMF,

modem, musical tones)

A0 6 I slave address input (to be

or VSS)

SCL 7 I I SDA 8 I I

connected to V

C-bus clock line

C-bus data line

1996 Nov 21 5

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

7 FUNCTIONAL DESCRIPTION

7.1 General (see Fig.1)

The Input Control Logic decodes the input data to determine whether DTMF, modem or musical tones are selected; and which particular tone or combination of tones is required.

A code representing the required tones is sent to the Divider Selection ROM which selects the correct division ratio in both of the Frequency Dividers (or in one divider, if only a single tone is required).

The Oscillator circuit provides a square wave of frequency

3.58 MHz. Each Frequency Divider divides the frequency of the Oscillator to give a serial digital square wave with a frequency simply related to that of the required tone.

The output from each Frequency Divider goes to a DAC, which is also fed by a clock derived from the oscillator. Using these two signals, the DAC produces an approximate sine wave of the required frequency, with an amplitude derived from the Voltage Reference.

The output from the DAC goes to an Adder where, for DTMF, it is combined with the output from the other DAC.

The output from the Adder goes through two stages of Low Pass Filters to give a smoothed tone (single or dual), and finally to the TONE output.

7.4 Data inputs (PCD3311C)

Inputs D0, D1, D2, D3, D4 and D5 are used in the parallel data input mode of the PCD3311C. Inputs D0 and D1 are also used in serial input mode when they act as the SCL and SDA inputs respectively. Inputs D0 and D1 have no internal pull-down or pull-up resistors and must not be left open in any application. Inputs D2, D3, D4 and D5 have internal pull-down.

D4 and D5 are used to select between DTMF dual, DTMF single, modem and musical tones (see Table 1). D0, D1, D2 and D3 select the tone combination or single tone within the selected application. They also, in combination with D4, select the standby mode. See Tables 2, 3, 4 and 5.

PCD 3312C has no parallel data pins as data input is via

C-bus.

the I

Table 1 Use of D5 and D4 to select application

D5 D4 APPLICATION

LOW LOW DTMF single tones; musical tones;

standby LOW HIGH DTMF dual tones (all 16 combinations) HIGH LOW modem tones HIGH HIGH musical tones

7.2 Clock/oscillator connection

The timebase for the PCD3311C and PCD3312C is a crystal-controlled oscillator, requiring a 3.58 MHz quartz crystal to be connected between OSCI and OSCO. Alternatively, the OSCI input can be driven from an external clock of 3.58 MHz.

7.3 Mode selection (PCD3311C)

The MODE input selects the data input mode for the PCD3311C. When MODE is connected to V

(HIGH),

data can be received in the parallel mode. When connected to VSS (LOW) or left open, data can be received via the serial I2C-bus.

PCD 3312C has no MODE input as data input is via the I2C-bus only.

7.5 Strobe input (PCD3311C )

The STROBE input (with internal pull-down) allows the loading of parallel data into D0 to D5 when MODE is HIGH.

The data inputs must be stable preceding the positive-going edge of the strobe pulse (active HIGH). Input data are loaded at the negative-going edge of the strobe pulse and then the corresponding tone (or standby mode) is provided at the TONE output. The output remains unchanged until the negative-going edge of the next STROBE pulse (for new data) is received. Figure 5 is an example of the timing relationship between STROBE and the data inputs.

When MODE is LOW, data is received serially via the

C-bus.

1996 Nov 21 6

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

90%

SPW

oscillator OFF

(ON)

tone

oscillator ON

no output tone

oscillator ON

output tones

handbook, full pagewidth

STROBE

TONE

10%

MGG511

Fig.5 Timing of STROBE, parallel data inputs and TONE output (770 Hz + 1477 Hz in example) in the parallel

mode (MODE = HIGH).

7.6 I2C-bus clock and data inputs

SCL and SDA are the serial clock and serial data inputs according to the I2C-bus specification, see Chapter 8. SCL and SDA must be pulled up externally to VDD.

For the PCD3311C, SCL and SDA are combined with parallel inputs D0 and D1 respectively - D0/SCL and D1/SDA operate serially only when MODE is LOW.

7.7 Address input

Address input A0 defines the least significant bit of the

C-bus address of the device (see Fig.6). The first 6 bits

I of the address are fixed internally. By tying the A0 of each device to VDD (HIGH) and VSS(LOW) respectively, two different PCD3311C or PCD3312C devices can be individually addressed on the bus.

Whether one or two devices are used, A0 must be connected to VDD or VSS.

1996 Nov 21 7

7.8 I

C-bus data conﬁguration (see Fig.6)

The PCD3311C and PCD3312C are always slave receivers in the I2C-bus configuration. The R/W bit in is thus always LOW, indicating that the master (microcontroller) is writing.

The slave address in the serial mode consists of 7 bits: 6 bits internally fixed, 1 externally set via A0. in the serial mode, the same input data codes are used as in the parallel mode. See Tables 2, 3, 4 and 5.

7.9 Tone output

The single and dual tones provided at the TONE output are first filtered by an on-chip switched-capacitor filter, followed by an active RC low-pass filter. The filtered tones fulfil the CEPT recommendations for total harmonic distortion of DTMF tones. An on-chip reference voltage provides output tone levels independent of the supply voltage. Tables 3, 4 and 5 give the frequency deviation of the output tones with respect to the standard DTMF, modem and music frequencies.

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

handbook, full pagewidth

acknowledge

from slave

MSB

S 010010A00AXXD5D4D3D2D1D0AP

slave address data

MGG512

R/W

acknowledge

from slave

internal STROBE

for data latching

Fig.6 I2C-bus data format.

7.10 Power-on reset

In order to avoid an undefined state when the power is switched ON, the devices have an internal reset circuit which sets the standby mode (oscillator OFF).

7.11 TABLES OF INPUT AND OUTPUT

The specified output tones are obtained when a 3.579545 MHz crystal is used. In each table, the logical states for the input data lines are related to voltage levels as follows: 1 = HIGH = V 0 = LOW = V

X = don’t care

Table 2 Input data for no output tone, TONE in 3-state

D5 D4 D3 D2 D1 D0 HEX

(1)

X 0 0 0 0 0 00 or 20 ON X 0 0 0 0 1 01 or 21 OFF X 0 0 0 1 0 02 or 22 OFF X 0 0 0 1 1 03 or 23 OFF

Note

1. The alternative HEX values depend on the value of D5.

1996 Nov 21 8

OSCILLATOR

Philips Semiconductors Product speciﬁcation

DTMF/modem/musical-tone generators PCD3311C; PCD3312C

Table 3 Input data and output for DTMF tones

STANDARD

D5 D4 D3 D2 D1 D0 HEX SYMBOL

00100008 − 697 697.90 +0.13 +0.90 00100109 − 770 770.46 +0.06 +0.46 0010100A − 852 850.45 −0.18 −1.55 0010110B − 941 943.23 +0.24 +2.23 0011000C − 1209 1206.45 −0.21 −2.55 0011010D − 1336 1341.66 +0.42 +5.66 0011100E − 1477 1482.21 +0.35 +5.21 0011110F − 1633 1638.24 +0.32 +5.24 01000010 0 941+1336 −−− 01000111 1 697+1209 −−− 01001012 2 697+1336 −−− 01001113 3 697+1477 −−− 01010014 4 770+1209 −−− 01010115 5 770+1336 −−− 01011016 6 770+1477 −−− 01011117 7 852+1209 −−− 01100018 8 852+1336 −−− 01100119 9 852+1477 −−− 0110101A A697+1633 −−− 0110111B B770+1633 −−− 0111001C C852+1633 −−− 0111011D D941+1633 −−− 0111101E * 941+1209 −−− 0111111F # 941+1477 −−−

FREQUENCY

Hz Hz % Hz

TONE

OUTPUT

FREQ.

FREQUENCY

DEVIATION

Table 4 Input data and output for modem tones

STANDARD

D5 D4 D3 D2 D1 D0 HEX

10010024 13001296.94 −0.24 −3.06 10010125 21002103.14 +0.15 +3.14 10011026 12001197.17 −0.24 −2.83 10011127 22002192.01 −0.36 −7.99 10100028 980978.82 −0.12 −1.18 10100129 11801179.03 −0.08 −0.97

1996 Nov 21 9

FREQUENCY

Hz Hz % Hz

TONE

OUTPUT

FREQ.

FREQUENCY

DEVIATION

TELECOM.

STANDARD

V.23

Bell 202

V.21

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