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ECS-.327-12.5-34B-TR ECS-.327-12.5-34B-TR is a 32.768 kHz tuning fork crystal from ECS Inc. with ±20 ppm tolerance and 12.5 pF load capacitance in a 3.2x1.5mm SMD package.
Mfr Part #:

ECS-.327-12.5-34B-TR

Available from 4 distributors
Mfr Name: ECS Inc.
ECS Inc.
ECS-.327-12.5-34B-TR is a 32.768 kHz tuning fork crystal from ECS Inc. with ±20 ppm tolerance and 12.5 pF load capacitance in a 3.2x1.5mm SMD package.
Total Stock: 9,733 pcs

ECS-.327-12.5-34B-TR Available from 4 distributors

Authorised
Non-Authorised

ECS-.327-12.5-34B-TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Aging
Drive Level
ESR (Equivalent Series Resistance)
Equivalent Series Resistance
Frequency
Frequency Tolerance
Height
Insulation Resistance
Lead Finish
Lead Style
Load Capacitance
Mounting Type
Operating Mode
Operating Temperature
Operating Temperature Range
Package / Case
Peak Solder Temperature
Shunt Capacitance
Size - Height
Size - Width
Standard Package Quantity
Storage Temperature Range
Tape & Reel
Temperature Coefficient
Termination Finish
Termination Style
Turnover Temperature
Type
size_length

ECS-.327-12.5-34B-TR Description

Short technical summary and product information.

The ECS-.327-12.5-34B-TR is a low-profile SMD tuning fork crystal from ECS Inc.'s ECX-31B series. It operates at a nominal frequency of 32.768 kHz with a frequency tolerance of ±20 ppm at +25°C. The crystal requires a load capacitance of 12.5 pF and has a maximum equivalent series resistance of 70 kΩ.

 

Designed for surface mount applications, this crystal is housed in a compact 2-SMD, No Lead ceramic package measuring 3.2 x 1.5 x 0.9 mm. It operates over an industrial temperature range of -40°C to +85°C and is RoHS compliant with MSL Level 1. The drive level range is 0.1 μW to 1.0 μW, making it suitable for low-power real-time clock circuits.

 

The crystal features gold termination finish and is supplied in tape and reel packaging with a standard quantity of 3,000 pieces. It is commonly used in RTC applications such as STM32 microcontrollers, offering reliable timekeeping with aging of ±3 ppm in the first year.

ECS-.327-12.5-34B-TR Quick Information

Product Type: Tuning Fork Crystal
Canonical Name: ECS Inc. ECX-31B SMD Tuning Fork Crystal, 32.768 kHz, ±20 ppm, 12.5 pF
Subcategory: kHz Crystals

ECS-.327-12.5-34B-TR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): Level 1 (Unlimited)
REACH Status: REACH Unaffected

ECS-.327-12.5-34B-TR Features

  • 32.768 kHz tuning fork crystal.
  • ±20 ppm frequency tolerance at 25°C.
  • 12.5 pF load capacitance, 70 kΩ max ESR.
  • Compact 3.2 x 1.5 mm SMD package.
  • Operating temperature range -40°C to +85°C.

ECS-.327-12.5-34B-TR Applications

  • Ideal for real-time clock (RTC) circuits.
  • Used in battery-powered portable devices.
  • Suitable for STM32 AN2867 RTC applications.
  • Perfect for high-density PCB designs.

ECS-.327-12.5-34B-TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the frequency of this crystal?

32.768 kHz.

What is the frequency tolerance?

±20 ppm.

What load capacitance does it require?

12.5 pF.

What is the operating temperature range?

-40°C to +85°C.

Is this crystal RoHS compliant?

Yes, RoHS3 compliant (as stated in datasheet).

What is the package size?

3.2 x 1.5 x 0.9 mm in a 2-SMD, No Lead package.

What is the equivalent series resistance?

70 kΩ maximum.

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