ZL81001GGG2

Overview

The ZL81001GGG2 is a DS1/E1/2048kHz transceiver designed for BITS and SSU timing in carrier-grade telecommunications equipment. It supports full DS1, E1, and G.703 synchronization signal handling with SSM message insertion and extraction. The device integrates two composite clock receivers compliant with Telcordia GR-378 and ITU-T standards, alongside two programmable-frequency inputs. Powered by a single 12.8MHz local oscillator, it operates at 1.8V with 3.3V I/O (5V tolerant). It features an 8-bit parallel or SPI serial processor interface and functions within the industrial temperature range of -40°C to +85°C.

Feature Summary

• Multi-protocol BITS/SSU transmitter and receiver supporting DS1, E1, and 2048kHz signals with SSM insertion/extraction
• Two composite clock receivers compliant with Telcordia GR-378 and G.703 centralized clock interfaces
• Internal software-selectable termination options including 75Ω, 100Ω, 110Ω, and 120Ω
• High-impedance receive inputs and transmit outputs enabling relay-free redundancy

Applications

• SONET/SDH ADMs, MSPPs, and MSSPs
• Digital Cross-Connects
• Service Provider Routers
• Carrier-grade telecom equipment requiring external DS1, E1, or CC timing interfaces

Procurement Notes

Verify the specific ordering suffix GGG2 against the manufacturer's current documentation to confirm package type and tray configuration. Ensure compatibility with the required industrial temperature range (-40°C to +85°C) and voltage specifications (1.8V core, 3.3V I/O). Confirm that the 256-pin CSBGA package fits the target PCB layout constraints.

Selection Notes

Select this component when designing systems requiring direct DS1, E1, or 2048kHz synchronization interfaces without external framer chips. It is suitable for applications needing integrated composite clock reception and flexible line interface termination. Consider the 256-pin CSBGA package size and thermal requirements during the initial hardware design phase.

Part Context

The ZL81001 belongs to Microchip's family of BITS/SSU timing transceivers. This specific part number denotes the 256-pin CSBGA package variant intended for high-density carrier-grade applications. It provides comprehensive timing recovery and generation capabilities for synchronous digital hierarchy networks.

Replacement Considerations

Consult official Microchip documentation for confirmed substitute part numbers. Verify pinout and register compatibility before replacing existing components in production designs.

FAQ

What standards does the ZL81001 comply with?

It complies with ANSI T1.101/T1.102/T1.107, ITU-T G.703/G.704/G.706/G.775/G.823/G.824/G.825, Telcordia GR-378-CORE, and IEEE 1149.1.

How is the device powered?

The ZL81001 operates from a single 12.8MHz local oscillator connected to the REFCLK pin, with internal logic running at 1.8V and 3.3V I/O that is 5V tolerant.

What types of clock inputs are supported?

It supports two composite clock receivers (IC1A/IC2A), two general-purpose CMOS clock inputs, and a BITS receiver for DS1, E1, 2048kHz, or 6312kHz signals.