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T7555DP, T7570, T7570 ML2

Table of contents:
Info of T7555DP
Info of T7570
Info of T7570 ML2

T7555DP, T7570, T7570 ML2 Selling Leads, Datasheet

MFG:LUCENT Package Cooled:PLCC D/C:08+/09+

T7555DP, T7570, T7570 ML2 Datasheet download

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Part Number: T7555DP

MFG: LUCENT

Package Cooled: PLCC

D/C: 08+/09+

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T7570 General Description

The Lucent Technologies Microelectronics Group T7570 Programmable PCM Codec with Hybrid-Balance Filter is a programmable PCM codec with an internal hybrid-balance network filter. It provides analog- to-digital and digital-to-analog conversion, as well as the transmit and receive filtering necessary to interface a voice telephone circuit to a time-division multiplexed (TDM) system. Programmable features include transmit gain setting over a 19.4 dB range and receive gain setting over a 19.4 dB range. An internal filter can be programmed to provide hybrid balancing over a wide range of loop impedances for both active and transformer subscriber line interface circuits (SLIC).

The device is programmed over a low pin-count, standard, serial, microprocessor-control interface. A 6-pin parallel input/output latch is provided to control interface circuits. Each of these pins can be individually programmed to be an input or an output. The T7570 is fabricated by using a low-power CMOS technology, requires a single 5 V supply, and is available in a 28-pin PLCC package for surface mounting.

T7570 Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Storage Temperature Range	T_stg	55	150	°C
Power Supply Voltage	V_DD		6.5	V
Voltage on Any Pin with Respect to Ground		0.5	0.5 + V_DD	V
Maximum Power Dissipation (package limit)	P_DISS		600	mW

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.

T7570 Features

` Programmable internal hybrid-balance network
` Programmable transmit gain
- 19.4 dB range, 0.1 dB step size
` Programmable receive gain
- 19.4 dB range, 0.1 dB step size
` Dual-programmable PCM interface
- Up to 64 time slots per frame
- Variable data rate (64 kHz to 4.096 MHz)
- Two timing modes
` Programmable m-law or A-law companding
` 300 W drive receive amplifier
` Analog and digital loopbacks
` On-chip sample-and-hold, autozero, and precision voltage reference
` Single 5 V power supply
` Latch-up free, low-power CMOS technology
- 70 mW typical operating power dissipation
- 1.5 mW typical standby power dissipation
` Serial microprocessor-control interface
` 6-pin parallel I/O latch
` TTL- and CMOS-compatible digital I/O
` Meets or exceeds D3/D4 (as per Lucent PUB 43801), ITU-T (formerly CCITT) G.711-G.714, and LSSGR requirements
` Operating temperature range: 40 °C to +85°C

T7570 Connection Diagram

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