Philips Semiconductors
Universal codec
Preliminary specification
PCD5096
1 FEATURES
• Applications in digital terminal equipment featuring line
interface and/or voice functions
• Digital signal processor performing echo cancellation,
codec functions and dial tone detection
• Two independent receive and transmit channels
• Independent programmable gain for all analog inputs
and outputs
• Programmable filter correction functions
• Flexible configuration of all functions
• IOM-2 serial data interface (slave mode only)
• Serial data interface to DTAM speech compression ICs
• 400 kHz I2C-bus slave interface (four I2C-bus
subaddresses)
• Codec compatible with G.714 CCITT specification
• PCM A-Law/u-Law (G.711 CCITT) and 16-bit linear data
• Dual differential inputs and outputs performing the
following functions:
– Line interface connection
– Loudspeaker, speaker phone (hands-free)
– Earpiece, microphone (handset)
• Peripheral interface: two I/O pins
• Separate ringer function
• Tone and ringer generator
• Conference call
• QFP44 package
• Low voltage (2.7 to 3.6 V)
• Low power consumption.
2 GENERAL DESCRIPTION
The universal codec combines two high resolution
bidirectional analog channels with a DSP in a single chip.
Besides the analog interfaces the PCD5096 includes two
digital interfaces: an I2C-bus interface allowing an external
microcontroller to program the chip, and a 4-wire serial
interface compatible with IOM-2 and with DTAM speech
compression ICs. This programmable serial interface
offers up to 14 channels and is capable of handling 8-bit
(A-law) or 16-bit (linear PCM) data packages, or any
combination of them. It opens the scope for a wide
application area, for example in combination with the
PCD5093H DECT baseband chip for digital cordless
business applications.
Several PCD5096s can be connected together for small
switching systems (PABX) offering a combination of
corded and cordless functionality. Besides the basic
functions like echo cancellation for two channels the
on-chip DSP provides all necessary functions such as
conference call and DTMF.
3 APPLICATIONS
The PCD5096 is designed for the telecommunications
market and is targeting small business and residential
systems offering a two-line interface or a one-line interface
combined with hands-free speaker phone. Specific
applications are detailed in Chapter 12.
4 ORDERING INFORMATION
TYPE
NUMBER
PCD5096H
NAME
QFP44
PACKAGE
DESCRIPTION
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10 × 10 × 1.75 mm
VERSION
SOT307-2
1997 Jan 22
3