TP3403V [Texas Instruments]

These devices are built on National’s double poly micro CMOS process and require only a single +5V supply. They use Alternate Mark Inversion (AMI) line coding to ensure low error rates in the presence of noise with lower EMI radiation than other codes. Full-duplex transmission at 144 kb/s is achieved on a single twisted wire pair using a burst-mode technique (Time Compression Multiplexed). They operate as an ISDN 'U' Interface for short loop applications, typically in a PBX environment, providing transmission for 2B channels and 1 D channel. On 24 AWG cable, the range is at least 1.8 km (6kft). System timing is based on a Master/Slave configuration. The devices include adaptive line equalizer, on-chip timing recovery, separate interfaces for B and D channels, and a driver for line transformer. They are available in both 20-pin DIP and 28-pin PLCC packages.