1

All specifications are subject to change without notice.

KX251 REV C

8/27/2014

SaRonix-eCera™ is a Pericom® Semiconductor company • US: +1-408-435-0800 TW: +886-3-4518888

• www.saronix-ecera.com

CMOS 32.768kHz

Ultra Low Current KX Series Crystal Oscillator

2.5 x 2.0mm

KX251

Product Features

• AT Cut 32.768 kHz XO

• CMOS compatible logic levels

• Ultra low active current (< 10µA)

• Very tight temperature stability

• Designed for standard reflow and washing

techniques

• Pb-free and RoHS/Green compliant

Product Description

The KX251 Series real time clock oscillator

achieves superb stability over a broad range

of operating conditions. It utilizes Pericom

proprietary technology to achieve ultra low

current less than 10µA. The output clock

signal is compatible with LVCMOS/LVTTL logic

levels. The device, available on tape and reel,

is contained in a 2.5 x 2.0mm surface-mount

ceramic package.

Applications

• Real-Time Clock Oscillator where low current

and tight stability are needed

Package: (Scale: none; Dimensions are in mm)

Pin Functions:

Pin

Function

1

OE Function

2

Ground

3

Clock Output

4

VDD

2.5 x 2.0mm Ceramic SMD

Part Ordering Information:

Following the above format, Saronix-eCera part numbers will be assigned upon

confirmation of exact customer requirements.

Recommended Land Pattern:

CREATED USING CADSTD LITE FREEWARE FROM WWW.CADSTD.COM. NON-COMMERCIAL USE ONLY.

CREATED USING CADSTD LITE FREEWARE FROM WWW.CADSTD.COM. NON-COMMERCIAL USE ONLY.

KX 251 V I S 032.768000

A

B

D

Stability

Temp Range

A = +/-20 ppm -20/+70°C

B = +/-25 ppm -20/+70°C

C = +/-50 ppm -20/+70°C

D = +/-25 ppm -40/+85°C

E = +/-50 ppm -40/+85°C

F = +/-20 ppm 0/+70°C

G = +/-25 ppm 0/+70°C

H = +/-25 ppm 0/+85°C

I = +/-25 ppm -20/+85°C

Z = Reference Design

Stability and Temp Range:

Frequency:

FFF.FFFFFF

kHz, “3 digits/decimal/6 digits” format

Voltage:

1=+3.3V

2=+2.5V

3=+1.8V

B=+3.0V

C

Internal #:

0 ~ 9

14-0033