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T-7689-FL, T7690, T7690FL0020T

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Info of T-7689-FL
Info of T7690
Info of T7690FL0020T

T-7689-FL, T7690, T7690FL0020T Selling Leads, Datasheet

MFG:LUCENT Package Cooled:QFP D/C:0048

T-7689-FL, T7690, T7690FL0020T Datasheet download

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Part Number: T-7689-FL

MFG: LUCENT

Package Cooled: QFP

D/C: 0048

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T7690 General Description

The T7690 and T7693 are fully integrated quad line interfaces containing four transmit and receive channels for use in both North American (T1/DS1) and European (E1/CEPT) applications. The devices have many of the same functions as the Lucent Technologies Microelectronics Group T7290A and provide additional flexibility for the system designer.

Included is a parallel microprocessor interface that allows the user to define the architecture, initiate loopbacks, and monitor alarms. The interface is compatible with many commercially available microprocessors.

The receiver performs clock and data recovery using a fully integrated digital phase-locked loop. This digital implementation prevents false lock conditions that are common when recovering sparse data patterns with analog phase-locked loops. Equalization circuitry in the receiver guarantees a high level of interference immunity. As an option, the raw sliced data (no retiming) can be output on the receive data pins.

Transmit equalization is implemented with lowimpedance output drivers that provide shaped waveforms to the transformer, guaranteeing template conformance. The quad device will interface to the digital cross connect (DSX) at lengths of up to 655 ft. for DS1 operation or to line impedances of 75 or 120 for CEPT operation.

A selectable jitter attenuator may be placed in the receive signal path for low-bandwidth line-synchronous applications, or it may be placed in the transmit path for multiplexer applications where DS1/CEPT signals are demultiplexed from higher rate signals. The jitter attenuator will perform the clock smoothing required on the resulting demultiplexed gapped clock.

T7690 Maximum Ratings

Parameter	Min	Max	Unit
dc Supply Voltage	-0.5	6.5	V
Storage Temperature	-65	125
Maximum Voltage (digital pins) with Respect to V_DDD	-	0.5	V
Minimum Voltage (digital pins) with Respect to GN_DD	-0.5	-	V
Maximum Allowable Voltages (RTIP[1-4], RRING[1-4]) with Respect to V_DD	-	0.5	V
Minimum Allowable Voltages (RTIP[1-4], RRING[1-4]) with Respect to GND	-0.5	-	V

Stresses in excess of the absolute maximum ratings can cause permanent or latent 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 device specification. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability.

T7690 Features

` Four fully integrated T1/E1 line interfaces
` Includes all driver, receiver, equalization, clock recovery, and jitter attenuation functions
` Ultralow power consumption
` Robust operation for increased system margin
` High interference immunity
` On-chip transmit equalization for improved sensitivity
` Low-impedance drivers for reduced power consumption
` Selectable transmit or receive jitter attenuation/ clock smoothing
` 3-state transmit drivers
` High-speed microprocessor interface
` Automatic transmit monitor function
` Per-channel powerdown
` For use in systems that are compliant with AT&T CB119; TR-TSY-000170, TR-TSY-000009, TRTSY-000499, TR-TSY-000253; ANSI T1.102 and T1.403; ITU-T G.703, G.732, G.735-9, G.775,G.823-4, and I.431
` Common transformer for transmit/receive
` Fine-pitch (25 mil spacing) surface-mount package, 100-pin bumpered quad flat pack
` 40°C to +85°C operating temperature range

T7690 Typical Application

· SONET/SDH multiplexers
· Asynchronous multiplexers (M13)
· Digital access cross connects (DACs)
· Channel banks
· Digital radio base stations, remote wireless modules
· PBX interfaces

T7690 Connection Diagram

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