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SIT5000AC-3E-33E0-19.440000Y

SIT5000AC-3E-33E0-19.440000Y

SiTime
19.44 MHz TCXO LVCMOS Oscillator 3.3V Enable/Disable 4-SMD, No Lead
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Overview

The SIT5000AC-3E-33E0-19.440000Y is a high-performance 19.44 MHz temperature-compensated MEMS oscillator (TCXO) from SiTime. It provides a stable LVCMOS output with +/-5ppm frequency stability over a wide temperature range of -40C to 85C. Operating at 3.3V, this component is designed for applications requiring high reliability and resistance to mechanical shock and vibration.

Why Choose This Part

This MEMS-based TCXO offers superior reliability compared to quartz-based oscillators, featuring high immunity to electromagnetic interference and mechanical stress. Its 5.00mm x 3.20mm footprint and 3.3V supply make it a drop-in replacement for standard quartz TCXOs while providing better long-term aging characteristics.

Applications

Synchronous Ethernet (SyncE)
Provides the 19.44 MHz reference clock required for ITU-T G.8262 compliance in networking hardware.
SONET/SDH Equipment
Used as a stable timing reference for legacy and modern telecommunications infrastructure.
Industrial Networking
Ideal for ruggedized switches and routers operating in high-vibration environments.
Wireless Base Stations
Functions as a precise local oscillator reference for cellular infrastructure and small cells.

Key Specifications

Type TCXO
Output LVCMOS
Function Enable/Disable
Frequency 19.44 MHz
Mounting Type Surface Mount
Base Resonator MEMS
Package / Case 4-SMD, No Lead
Size / Dimension 0.197" L x 0.126" W (5.00mm x 3.20mm)
Voltage - Supply 3.3V
Frequency Stability +/-5ppm
Height - Seated (Max) 0.031" (0.80mm)
Operating Temperature -20degC ~ 70degC
Current - Supply (Max) 33mA
Supplier Device Package 4-SMD (5x3.2)

Getting Started

To evaluate this part, ensure the 3.3V supply is decoupled with a 0.1uF ceramic capacitor placed close to the VDD pin. The output can drive a standard 15pF LVCMOS load; use a series termination resistor if the trace length exceeds two inches to minimize signal reflections.