ZL30772LFG7 - Dual-Channel IEEE 1588/SyncE Packet Clock Synchronizer | Microchip
MPN: ZL30772LFG7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $48.5 | $48.50 |
| 10 | $43.65 | $436.50 |
| 100 | $39.2 | $3,920.00 |
| 500 | $35.85 | $17,925.00 |
| 1,000 | $32.4 | $32,400.00 |
ZL30772LFG7 Overview
An IEEE 1588 packet clock network synchronizer is a specialized timing IC that recovers frequency and phase from packet networks (using PTP messages or SyncE ESMC messaging) and generates ultra-stable reference clocks for downstream PHYs, framer/mapper devices, and DSP processors. It sits in the timing hierarchy as a network-side timing source, downstream of a central office primary reference and upstream of line-card transceivers. ZL30772LFG7 sits higher in the value chain than standalone PLL clock generators such as CDCE62005 or DSPLL devices because it adds software-managed PTP-aware servo control on top of the frequency synthesis.
Key features include dual independent timing channels with adaptive DPLL bandwidth, sub-100 ns holdover accuracy, hardware-accelerated PTP timestamp processing, support for SyncE ESMC SSM/QL messaging, programmable output formats (LVCMOS, LVDS, HCSL differential outputs), and a SPI/I2C host interface for stack configuration. The integrated PTP stack supports ordinary, boundary, transparent, and slave-only clock modes per IEEE 1588-2008. Output jitter performance targets 1 ps RMS (12 kHz to 20 MHz band) when locked to a GPS or SyncE reference, suitable for LTE and 5G base station phase-stability requirements.
The device uses a third-generation miTimePLL core with digital filter architecture that achieves sub-ppb (parts-per-billion) frequency accuracy in locked mode. Its holdover algorithm retains accurate timing during upstream reference loss by steering the internal DCO (digitally controlled oscillator), maintaining frequency drift below 0.01 ppb for short holdover intervals. The on-chip PTP engine handles L2/L3 packet timestamping, servo filtering, and master/slave message exchange, offloading the host processor.
Typical applications include IEEE 1588 grandmaster and slave clocks for 4G LTE and 5G NR base stations, SyncE equipment for carrier Ethernet, SONET/SDH demarcation units, and packet-based backhaul timing for small cells and macro cells. The wide frequency coverage (1 Hz to 1.045 GHz) also supports non-telecom uses such as instrumentation synchronization.
When designing with this device, allocate dedicated board space for the 80-LGA thermal pad and follow Microchip's reference layout for the analog supply rails; noise coupling from switching converters directly degrades jitter performance. Verify the SPI/I2C firmware stack compatibility with your host RTOS, as the embedded PTP stack requires Microchip-supplied firmware images.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet for engineers evaluating the ZL30772LFG7.
Drop-in alternatives for ZL30772LFG7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ZL30772LFG7Q07Q
✅ Drop-In📋 Reference alternative (not in catalog)
ZL30795LFG7
✅ Drop-In📋 Reference alternative (not in catalog)
ZL30771LFG7
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ZL30773LFG7
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ZL30772LFG7 Specifications
| Part Number | ZL30772LFG7 |
| Manufacturer | Microchip Technology (formerly Microsemi) |
| Category | Application Specific Clock/Timing - Synchronizer |
| Function | IEEE 1588-2008 + Synchronous Ethernet packet clock network synchronizer |
| Timing Channels | 2 independent channels |
| Maximum Output Frequency | 1.045 GHz |
| Number of Outputs | 2 differential output channels |
| Input Reference | SyncE ESMC + IEEE 1588 PTP |
| Host Interface | SPI / I2C |
| Package | 80-LGA (11x11 mm) |
| Mounting Type | Surface Mount |
| PTP Stack | IEEE 1588-2008 (on-chip firmware) |
| SyncE Support | ESMC SSM/QL messaging |
| RoHS Status | Compliant (per distributor listings) |
ZL30772LFG7 80-lga (11x11 mm) Pin Configuration Guide
Pin configuration for ZL30772LFG7 (80-lga (11x11 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ZL30772LFG7.
Refer to the datasheet for full pin configuration.
Typical Applications
ZL30772LFG7 is suitable for 6 applications: 5G NR Base Station Synchronization, Carrier Ethernet / SyncE Demarcation, Small-Cell Packet Backhaul Timing, SONET/SDH Demarcation Timing, IEEE 1588 Grandmaster Clock (Standalone), Industrial Test and Measurement Timing.
5G NR Base Station Synchronization
Provides the IEEE 1588-2008 grandmaster or slave clock function for 5G NR base stations. The ZL30772LFG7's miTimePLL adaptive DPLL achieves sub-ppb frequency accuracy and sub-100 ns time alignment when locked to a GPS-disciplined grandmaster or a SyncE transport network, meeting 3GPP TS 38.401 phase-stability requirements. Per the Microchip product page, the device supports both precision time alignment (needed for air-interface frame timing) and frequency synchronization (needed for carrier-frequency coherence). Two independent timing channels allow a single device to serve two radio units (RU) on the same baseband card, halving the BOM versus single-channel packet-clock ICs.
Recommended
Carrier Ethernet / SyncE Demarcation
Recovers SyncE clocks and PTP time stamps at the customer edge of a carrier Ethernet network. The ZL30772LFG7 receives both the physical-layer SyncE reference (via a 1PPS or Ethernet PHY line-side reference) and the IEEE 1588 PTP packet stream, then selects the higher-priority reference per ESMC SSM/QL messaging. Output frequencies up to 1.045 GHz drive downstream PHYs, OTN mappers, and OTN fabric devices. The device's holdover mode keeps the line-card functioning within G.8262 EEC masks for hours after upstream loss, eliminating service-affecting resets in mobile backhaul nodes.
Recommended
Small-Cell Packet Backhaul Timing
Serves small-cell backhaul timing where packet-based primary references replace legacy GPS or E1/T1 lines. The ZL30772LFG7 meets Class C/D LTE small-cell phase-stability requirements using its embedded PTP engine and adaptive servo. The host processor can be a low-cost Cortex-M4 because the ZL30772 firmware handles PTP message exchange autonomously over SPI/I2C. The device's small 11x11 mm 80-LGA footprint fits inside densely packed small-cell enclosures with tight thermal budgets.
Recommended
SONET/SDH Demarcation Timing
Provides the timing reference for legacy SONET/SDH demarcation units being upgraded to support packet-based synchronization alongside traditional TDM transport. The ZL30772LFG7 drives the line-side SONET/SDH mapper with a stable gapped clock derived from PTP / SyncE inputs. Even though SONET/SDH transport is on the decline, hybrid deployments still need packet-aware timing sources for traffic classification, ring-protection switching, and frequency alignment. The 1 Hz to 1.045 GHz output range covers the SONET STS-1 (51.84 MHz), STS-3 (155.52 MHz), and OTN ODU0 rates without a separate fractional-N synthesizer.
Recommended
IEEE 1588 Grandmaster Clock (Standalone)
Can serve as the core of a standalone IEEE 1588 grandmaster clock in conjunction with a GPS/GNSS receiver. The ZL30772LFG7 receives 1PPS and frequency reference from the GNSS discipline module and outputs PTP-aware Sync to downstream slaves on the packet network. Grandmasters based on the ZL30772 are qualified by multiple OEMs for G.8275.1 (full-timing support from network) and G.8275.2 (partial timing support from network) deployments. The host processor can be a Cortex-A53 SoC running Linux PTPd with ZL30772 as the hardware timestamp source.
Recommended
Industrial Test and Measurement Timing
Beyond telecom, the ZL30772LFG7 can synchronize distributed industrial test and measurement systems where sub-microsecond sample correlation across remote nodes matters. Synchronized oscilloscopes, distributed acoustic sensing (DAS) interrogators, and large-scale test equipment all benefit from IEEE 1588 timing. The wide 1 Hz to 1.045 GHz range covers both low-rate trigger lanes (1 Hz to 100 kHz) and high-rate ADC sample clocks (10 MHz to 1.045 GHz), allowing the same device to drive a heterogeneous system from one timing tree.
Recommended
Recommended Products Summary
Engineering reference data for ZL30772LFG7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ZL30772LFG7Q07Q | ZL30795LFG7 | ZL30771LFG7 | ZL30773LFG7 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-LGA (VFLGA-80, 11x11 mm) | 80-LGA (VFLGA-80, 11x11 mm) - same | 80-LGA (VFLGA-80, 11x11 mm) - same | 80-LGA (VFLGA-80, 11x11 mm) - same | 80-LGA (VFLGA-80, 11x11 mm) - same |
| Function | Dual-channel IEEE 1588 + SyncE packet clock synchronizer | Dual-channel IEEE 1588 + SyncE (same; minor config defaults differ) | Higher carrier-grade dual-channel SyncE + PTP (extended holdover / G.8273.2-class) | IEEE 1588 + SyncE family single-channel variant (per ZL307xx datasheet families) | IEEE 1588 + SyncE family variant (per ZL307xx datasheet families) |
| Timing Channels | 2 independent | 2 independent | 2 independent | 1 independent (family single-channel variant) | Family variant - verify channel count in datasheet |
| Maximum Output Frequency | 1.045 GHz | 1.045 GHz | 1.045 GHz (per ZL307xx family specification) | 1.045 GHz (per ZL307xx family specification) | 1.045 GHz (per ZL307xx family specification) |
| Host Interface | SPI / I2C | SPI / I2C | SPI / I2C (per ZL307xx family) | SPI / I2C (per ZL307xx family) | SPI / I2C (per ZL307xx family) |
| PTP Stack | On-chip IEEE 1588-2008 | On-chip IEEE 1588-2008 | On-chip IEEE 1588-2008 (extended compliance) | On-chip IEEE 1588-2008 (per family) | On-chip IEEE 1588-2008 (per family) |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Dual-channel packet clock synchronization in single 80-LGA package (vs ZL30721LFF7)
- On-chip PTP stack (no host firmware development) (vs Generic packet clock IC without on-chip PTP stack)
- Same-footprint upgrade path to higher-grade ZL30795LFG7 (vs ZL30795LFG7)
Design Notes
The ZL30772LFG7 requires low-noise analog supplies (typical +/-2% tolerance) for the DPLL core and PTP timestamp path. Use a low-dropout linear regulator (e.g., a 1-A LDO such as the Microchip MIC69502) downstream of a switching converter, with a 1 uF ceramic + 10 uF bulk filter network at the device supply pin. Estimated: at a typical 1.2-V core voltage and 250-mA active current, the analog rail dissipates approximately 0.3 W; budget PCB copper area for thermal relief accordingly. Shared switching noise on the analog supply directly raises output jitter above the 12-kHz-20-MHz specification.
Route differential outputs (HCSL / LVDS) with 100-ohm differential impedance and length-matched traces to minimize skew on high-speed outputs (>500 MHz). Keep the host SPI/I2C traces short and isolated from the analog PLL block; assign a separate ground return path under the ZL30772 LGA thermal pad to prevent digital return current from coupling into the analog section. Per the package outline (11x11 mm VFLGA-80), expose sufficient bottom-side thermal copper via stitching to handle ~0.5 W continuous dissipation.
Do not reload the embedded PTP firmware image when the part is already running - that resets all adaptive DPLL bandwidth state and forces the device to re-acquire lock. Also, configure the unused output channel and its associated PLL band register to a disabled state at initialization; an uninitialized output can ring into the analog supply and corrupt the timing of the active channel. Verify that the host firmware image version matches the firmware revisions table in the latest datasheet revision before deployment.
Estimated: the 80-LGA (11x11 mm) thermal pad connects to a 0-ohm junction-to-ambient thermal resistance of approximately 18-22 C/W depending on PCB copper-pour area. At 250 mA active current and 1.2 V core supply (0.3 W dissipation), the junction rises 6-9 C above ambient - well within commercial-grade limits. Forcing holdover or driving two LVDS outputs at full rate can push active power to ~0.6 W, requiring 1 square inch or more of top-side copper for thermal relief.
Compliance Information
RoHS and REACH compliant per DigiKey and Mouser product listings. Not AEC-Q100 qualified (telecom/commercial grade). Conflict-minerals status: Microchip publishes CMRT disclosures; treated as compliant per ZL307xx family.
