ZL30301GAG

Overview

The ZL30301GAG is a Timing over Packet (ToP) device manufactured by Microchip Technology, originally designed by Zarlink Semiconductor. It recovers and transmits network synchronization over Ethernet, IP, and MPLS networks. The component supports Master, Slave, and Repeater modes of operation and generates outgoing packet references locked to the TS_CLKi electrical reference clock. It recovers up to four independent clock frequencies from packet streams within the range of 1.544 MHz to 10 MHz. The device features dual configurable packet interfaces, including two MII interfaces or one MII and one GMII/TBI interface. It operates within a temperature range of -40°C to +85°C and is housed in a 324-ball PBGA package.

Feature Summary

• Recovers and transmits network synchronization over asynchronous packet networks using patent-pending Timing over Packet technology.
• Supports flexible classification of incoming packets at layers 2, 3, 4, and 5 with multi-protocol encapsulation for Ethernet, VLAN, IPv4/6, MPLS, L2TPv3, UDP, and RTP.
• Includes a flexible 32-bit host CPU interface compatible with Motorola PowerQUICC I and II processors.
• Provides JTAG boundary-scan interface for board-level testing and system function port capabilities.

Applications

• GSM and UMTS air interface synchronization over packet networks
• Circuit Emulation Service over Packets (CESoP) and TDM over IP (TDMoIP)
• IP-PBX systems
• VoIP gateways
• Video conferencing and broadband video distribution

Procurement Notes

Verify the manufacturer origin as the ZL30301 was originally developed by Zarlink Semiconductor before acquisition by Microchip Technology. Confirm that the GAG suffix corresponds to the 324-ball PBGA package variant intended for tray packaging. Ensure compatibility with the required host processor interface, specifically checking support for Motorola PowerQUICC I and II architectures if applicable to the design.

Selection Notes

Select this component when precise timing recovery is required over asynchronous packet networks such as Ethernet, IP, or MPLS. It is suitable for applications needing support for multiple independent clock frequencies between 1.544 MHz and 10 MHz. Consider its capability to handle complex packet classification and multi-protocol encapsulation if the network environment involves mixed traffic types requiring layer 2 through layer 5 processing.

Part Context

The ZL30301 belongs to the ZL3030x family of devices implementing Timing over Packet (ToP) technology. This family enables high-performance clock synchronization across asynchronous packet networks by combining line card microprocessors with specialized hardware for timestamping and clock synthesis. The ZL30301 specifically focuses on recovering up to four independent clocks while maintaining average frequency accuracy better than ±15 ppb with a Stratum 3 quality TCXO.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip Technology for current portfolio equivalents or updated components replacing the legacy Zarlink Semiconductor product line.