Product Overview
The 8A34001E-000AJG8 is a high-performance Synchronization Management Unit (SMU) from Renesas Electronics, part of the ClockMatrix family. This 8-channel system synchronizer generates ultra-low jitter precision timing signals based on the IEEE 1588 Precision Time Protocol (PTP) and Synchronous Ethernet (SyncE), enabling sub-microsecond time synchronization in packet-based and physical layer equipment.
The device provides eight independent timing channels, each configurable as a frequency synthesizer, jitter attenuator, Digitally Controlled Oscillator (DCO), or Digital Phase Lock Loop (DPLL). DPLLs comply with ITU-T G.8262 for Synchronous Ethernet and support legacy SONET/SDH and PDH requirements. DCOs can synthesize PTP/IEEE 1588 clocks with frequency resolution better than 1.11 x 10-16, making them ideal for Telecom Boundary Clock (T-BC) and Telecom Time Slave Clock (T-TSC) applications per ITU-T G.8273.2.
Housed in a 144-ball chip array BGA (CABGA) package measuring just 10 x 10 mm with 0.8 mm pitch, the 8A34001 delivers up to 12 differential or 24 LVCMOS outputs at frequencies from 0.5 Hz to 1 GHz. RMS jitter is below 150 fs typical (10 kHz to 20 MHz), supporting 100GBASE-R, 40GBASE-R, and lower-rate Ethernet interfaces as well as SONET/SDH, PDH, CPRI/OBSAI, and IEEE 1588 Time Stamp Units (TSUs). The device operates from 1.71 V to 3.465 V supply over the -40 degC to +85 degC industrial temperature range.
Key Specifications
| Parameter | Value |
|---|---|
| Device Type | Clock Synchronizer / SMU (Synchronization Management Unit) |
| Timing Channels | 8 independent (DPLL / DCO / Synthesizer / Jitter Attenuator) |
| Clock Inputs | 8 differential / 16 single-ended (0.5 Hz to 1 GHz) |
| Clock Outputs | 12 differential / 24 LVCMOS (0.5 Hz to 1 GHz, 250 MHz LVCMOS max) |
| Output Jitter | < 150 fs RMS typical (10 kHz to 20 MHz) |
| DPLL Loop Bandwidth | 12 microHz to 22 kHz (programmable) |
| DCO Frequency Resolution | < 1.11 x 10^-16 (sub-ppt) |
| Phase Tuning Resolution | 1 ps (per FOD output) |
| TDC Resolution | < 1 ps (DPLL phase detectors) |
| Input-to-Output Phase Offset | Up to +-1.638 micro-s per input, 1 ps steps |
| Output Standards | LVCMOS, LVDS, LVPECL, HCSL, CML, SSTL, HSTL |
| Differential Output Swing | 400 / 650 / 800 / 910 mV (selectable) |
| Output Voltage Options | 3.3 V, 2.5 V, 1.8 V (LVCMOS: +1.5 V, 1.2 V) |
| System APLL Reference | 25 MHz to 54 MHz crystal / XO |
| System DPLL XO Input | 1 MHz to 150 MHz (XO/TCXO/OCXO) |
| Supply Voltage | 1.71 V to 3.465 V |
| Standards Compliance | ITU-T G.8262 (SyncE), G.8273.2 (T-BC/T-TSC), G.8263, G.8264 |
| Serial Interface | I2C (1 MHz) / SPI (50 MHz) |
| Configuration | OTP (16 configs) / External I2C EEPROM / JTAG |
| Operating Temperature | -40 degC to +85 degC |
| Package | 144-CABGA (10 x 10 mm, 0.8 mm pitch) |
Features
- 8 independent timing channels: DPLL, DCO, frequency synthesizer, or jitter attenuator
- IEEE 1588 PTP support via DCO mode with sub-ppt frequency resolution
- ITU-T G.8262 compliant SyncE EEC options 1 and 2
- ITU-T G.8273.2 T-BC / T-TSC Class C/D compliant
- Combo Bus for DPLL/DCO frequency sharing (G.8273.2 support)
- Hitless, dynamic switching between DPLL and DCO modes
- Ultra-low jitter: <150 fs RMS typical (10 kHz – 20 MHz)
- 12 differential outputs / 24 LVCMOS outputs, 0.5 Hz to 1 GHz
- 8 differential / 16 single-ended inputs, 0.5 Hz to 1 GHz
- Any input mappable to any or all timing channels
- Fractional Output Dividers (FODs) with 1 ps phase tuning
- Per-input programmable phase offset: +-1.638 micro-s in 1 ps steps
- Reference monitors: LOS, activity, frequency monitoring
- Automatic reference selection with priority tables
- Revertive / non-revertive reference switching
- Supports sync pulses: 1PPS, 5PPS, 10PPS, EPPS, 50Hz-8kHz
- System APLL: 25-54 MHz crystal or XO
- System DPLL: 1 MHz-150 MHz XO/TCXO/OCXO input
- I2C (1 MHz) and SPI (50 MHz) serial processor ports
- Internal OTP memory: up to 16 customer configurations
- External I2C EEPROM auto-configuration support
- JTAG boundary scan (1149.1)
- 144-CABGA 10 x 10 mm package, 0.8 mm pitch
- RoHS compliant, MSL 3, industrial temperature range
Applications
- 5G NR O-RAN radio units and base stations
- Core and access IP switches and routers
- Synchronous Ethernet (SyncE) equipment
- Telecom Boundary Clocks (T-BC) and T-TSCs
- 10G / 40G / 100G Ethernet interface synchronization
- Central office timing source and distribution
- Wireless infrastructure (4.5G and 5G)
- IEEE 1588 PTP grandmaster and slave clocks
- SONET / SDH / PDH network equipment
- CPRI / OBSAI wireless base station interfaces
- PTP time cards for data centers
- High-speed SERDES reference clocks (up to 28 Gbps)