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ECS-.327-12.5-1210-TR

ECS-.327-12.5-1210-TR

ECS Inc.
32.768 kHz ±20ppm Crystal 12.5pF 90 kOhms 2-SMD, No Lead
Active97,566 in stock
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Overview

The ECS-.327-12.5-1210-TR is an ultra-miniature 32.768 kHz tuning fork crystal designed for space-constrained timing applications. Housed in a 1.20mm x 1.00mm SMD package with a low profile of 0.50mm, it provides a stable clock source for real-time clocks (RTCs) and low-power microcontrollers. It features a standard 12.5pF load capacitance and operates across a wide industrial temperature range from -40 to +85 degrees Celsius.

Why Choose This Part

This crystal offers an exceptionally small footprint of 1.2mm x 1.0mm, making it one of the smallest 32.768 kHz components available. It provides a standard +/-20ppm frequency tolerance and is optimized for low-power oscillation circuits with a typical ESR of 90 kOhms.

Applications

Real-Time Clock (RTC) Reference
Provides the 32.768 kHz time base required for accurate date and time keeping in battery-powered electronics.
Wearable Technology
The 1210 package size allows integration into compact smartwatches and fitness trackers where PCB real estate is at a premium.
IoT Sleep Timers
Acts as the low-speed clock source for deep-sleep wake-up timers in wireless sensors to minimize power consumption.
Industrial Metering
Reliable timing for utility meters and data loggers requiring long-term stability in outdoor environments.

Key Specifications

Type kHz Crystal (Tuning Fork)
Frequency 32.768 kHz
Mounting Type Surface Mount
Operating Mode Fundamental
Package / Case 2-SMD, No Lead
Load Capacitance 12.5pF
Size / Dimension 0.047" L x 0.039" W (1.20mm x 1.00mm)
Frequency Tolerance +/-20ppm
Height - Seated (Max) 0.020" (0.50mm)
Operating Temperature -40degC ~ 85degC
ESR (Equivalent Series Resistance) 90 kOhms

Getting Started

Ensure that the PCB traces between the crystal and the MCU/RTC pins are as short as possible to minimize parasitic capacitance. When calculating external load capacitors, account for the 12.5pF load specification and approximately 1-2pF of stray PCB capacitance.