Quad Digital Adapter For Subscriber Loops (QDASL)

The TP3404 is a combination 4-line transceiver for voice and data transmission on twisted pair subscriber loops, typically in PBX line card applications. It is a companion device to the TP3401,TP3402,TP3403 DASL single-channel transceivers. In addition to 4 independent transceivers, a time-slot assignment circuit is included to support interfacing to the system Backplane
Each QDASL line operates as an ISDN "U" Interface for short loop applications, typically in a PBX environment, providing transmission for 2 B channels and 1 D channel.
Full-duplex transmission at 144 kb/s is achieved on single twisted wire pairs using a burst-mode technique (Time Compression Multiplexed). All Timing sequences necessary for loop activation and de-activation are generated on-chip.
Alternate Mark Inversion (AMI) line coding is used to ensure low error rates in the presence of noise with lower EMI radiation than other codes such as Biphase (Manchester). On #24 AWG cable the range is at least 1.8 km (6k ft.).
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
TP3404V/NOPB Texas Instruments Quad Digital Adapter for Subscriber Loops (QDASL) 28-PLCC
TP3404V/63SN Texas Instruments Quad Digital Adapter for Subscriber Loops (QDASL) 28-PLCC
TP3404 's PackagesTP3404 's pdf datasheet

TP3404 Pinout, Pinouts
TP3404 pinout,Pin out
This is one package pinout of TP3404,If you need more pinouts please download TP3404's pdf datasheet.

TP3404 Application circuits
TP3404 circuits
This is one application circuit of TP3404,If you need more circuits,please download TP3404's pdf datasheet.

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