ZL30643LDG1

Overview

The ZL30643LDG1 is a line card timing IC from the ZL3064x family, featuring up to five independent clock channels. It supports up to 10 differential or single-ended inputs and provides up to 20 CMOS or 10 differential outputs. The device accepts input frequencies from 1 kHz to 1250 MHz and generates output frequencies from 0.5 Hz to 750 MHz. It includes up to eight DPLLs for reference switching and holdover, with typical output jitter of 100 fsRMS at 156.25 MHz. Operating voltages are 1.8V and 3.3V, housed in a 64-lead VQFN package.

Feature Summary

• Up to five independent clock channels with any-to-any frequency conversion
• Supports up to 10 inputs (differential/CMOS) and up to 20 CMOS or 10 differential outputs
• Up to 8 DPLLs for hitless reference switching and high-resolution holdover
• Integrated MiToDSync and MiToDBasic time-of-day interfaces

Applications

• Line card timing for SyncE and SyncE+1588 systems
• Wireless base stations including 3G, W-CDMA, 4G/LTE, LTE-A, and 5G
• Remote Radio Units (RRU) and wireless backhaul networks

Procurement Notes

Verify the specific channel count and DPLL configuration for the ZL30643 variant against the official datasheet, as the ZL3064x series contains multiple part numbers with varying I/O counts. Confirm package availability and lead times through authorized Microchip distributors prior to ordering.

Selection Notes

Select the ZL30643LDG1 when the design requires up to five clock channels and up to ten inputs. Ensure the application utilizes the supported input frequency range of 1 kHz to 1250 MHz and output range of 0.5 Hz to 750 MHz. Verify that the required number of DPLLs is available within this specific model compared to other members of the ZL3064x family.

Part Context

The ZL30643LDG1 belongs to the ZL30641-ZL30645 product line, which offers scalable timing solutions with up to five channels. These devices are designed for carrier-grade systems requiring low jitter and flexible synchronization capabilities. The LDG1 suffix indicates a lead-free, green RoHS-compliant version in a VQFN package.

Replacement Considerations

Other models in the ZL3064x family (ZL30641, ZL30642, ZL30644, ZL30645) share the same pinout but differ in the number of active channels and DPLLs. Verify that the replacement part meets the specific input/output and DPLL requirements of the original design.