April 1993

4

Philips Semiconductors

Product specification

NICAM-728 demodulator (NIDEM)

TDA8732

PINNING

SYMBOL

PIN

DESCRIPTION

CLKLPF

1

transconductance output for bit-rate loop low-pass filter

2

ground for analog circuitry

QPSKIN

3

QPSK modulated data input

4

power supply for analog circuitry

CFI

5

baseband cosine channel input after filtering

CFO

6

demodulated cosine channel output to low-pass filter

SFO

7

demodulated sine channel output to low-pass filter

SFI

8

baseband sine channel input after filtering

CARLPF

9

transconductance output for carrier loop low-pass filter

CAROSC

10

crystal input for carrier oscillator (frequency is 11.7 MHz

or 13.104 MHz)

QMC

11

monostable components connection for quadrature data

transition detector

12

power supply for digital circuitry

IMC

13

monostable components connection for in-phase data

transition detector

14

ground for digital circuitry

DATA

15

728 kbit/s demodulated and differentially decoded serial

data output

CLKIN

16

bit-rate clock input at 728 kHz, phase-locked to the data

CLK

17

output clock frequency at 728 kHz

C5M

18

reference frequency output at

5.824 MHz (8 x CLK)

TEST

19

input for test purpose (grounded for normal operation)

CLKOS

20

crystal input for clock oscillator (frequency is 11.648 MHz)

Fig.2 Pin configuration.