PCD4440T

INTEGRATED CIRCUITS DATA SHEET PCD4440T Analog voice scrambler/descrambler Product specification Supersedes data of October 1992 File under Integrated Circuits, IC03 1996 Dec 20 Philips Semiconductors Product specification Analog voice scrambler/descrambler CONTENTS 1 2 3 6 6.1 6.2 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 8 8.1 8.2 8.3 8.4 8.5 9 10 11 12 14.1 14.2 14.3 14.4 15 16 17 FEATURES APPLICATIONS GENERAL DESCRIPTION PINNING INFORMATION Pinning Pin description Scrambling Power supply (VDD, VSS) Oscillator (OSCI) Splitting frequency and mode selection Serial clock input (SCL), Serial data input (SDA) Address input (A0) I2C-bus data configuration Signal input (IN), Signal output (OUT) I2C BUS INTERFACE Bit transfer Start and stop conditions System configuration Acknowledge Timing specifications APPLICATIONS HANDLING LIMITING VALUES CHARACTERISTICS Introduction Reflow soldering Wave soldering Repairing soldered joints DEFINITIONS+ LIFE SUPPORT APPLICATIONS PURCHASE OF PHILIPS I2C COMPONENTS PCD4440T 1996 Dec 20 2 Philips Semiconductors Product specification Analog voice scrambler/descrambler 1 FEATURES 2 APPLICATIONS PCD4440T Scrambler or descrambler function Scrambling in frequency domain Selectable split frequency (up to 10 selections per second) Telephony-band filtering included No increase in bandwidth No external components required Small signal delay Insensitive to distortion and group delay of transmission channel Control via serial I2C-bus Low...