T7507

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability.

The T7507 device is a single-chip, four-channel A-law PCM codec with filters. This integrated circuit provides analog-to-digital and digital-to-analog conversion. It provides the transmit and receive filtering necessary to interface a voice telephone circuit to a time-division multiplexed system. This device is packaged in a 44-pin PLCC.

This T7507 is intended for use with Lucent Technologies Microelectronics Group's L8567 SLIC. When used with that SLIC, the line tip/ring pair is terminated in the network required for central office applications in the People's Republic of China (PRC). Proper hybrid balance and transmit and receive gains are also obtained.

This T7507 uses a serial data control scheme to interface with the controlling processor. This device has a latched parallel data control scheme to provide control bits to, and receive status bits from, the SLIC and switch. This interface is designed to be compatible with the Lucent L8567 SLIC and L7583 solidstate switch.