MEMS oscillator for 48.002 MHz LVPECL clock trees
The DSC1122CE5-048.0020T is a MEMS-based XO (Standard) from Microchip's DSC1122 series, delivering a fixed 48.002 MHz output in LVPECL logic — a common frequency for Ethernet PHY reference clocks or precision timing in base stations and test equipment. Its ±10 ppm frequency stability over the -20°C to 70°C commercial range keeps the clock edge jitter within tight margins for 10/100/1000BASE-T applications without needing a TCXO.
Supply and output compatibility
LVPECL output requires DC-biased termination (typically Thevenin-equivalent 50 Ω to VCC-2 V) — the same termination works across the supply range, simplifying board layout.
Package and footprint for 6-SMD assembly
Housed in a 6-SMD no-lead package measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm — the compact footprint fits dense PCB layouts where a 5x7 mm quartz oscillator would crowd adjacent passives.