PARAMETERS

CONDITIONS

ECX-1637B

UNITS

MIN

TYP

MAX

Frequency

16.000

96.000

MHz

Mode of Oscillation

Fundamental

Frequency Tolerance*

@ +25°C

(C option)

± 10

ppm

Frequency Stability*

-30 ~ +85°C

(KY option)

± 10

ppm

Shunt Capacitance

Co

3

pF

Load Capacitance

Specify in P/N

8

pF

Drive Level

100

μW

Operating Temperature*

(Y option)

-30

+85

°C

Storage Temperature

-55

+125

°C

Aging (First Year)

@ +25°C ±3°C

±1

ppm

ECS - FREQUENCY ABBREVIATION

LOAD

CAPACITANCE

PACKAGE

AVAILABLE OPTIONS

Tolerance

Stability

Temp

Range

PACKAGING

Frequency (MHz)

ESR Ω Max.

16.000 ~ 19.999

150

20.000 ~ 23.999

70

24.000 ~ 39.999

50

40.000 ~ 81.999

40

82.000 ~ 96.000

25

Pad Connections

1

In/Out

2

Gnd

3

Out/In

4

Gnd

OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS

The sub miniature ECX-1637B is a very compact SMD Crystal.

The 2.0 x 1.6 x 0.45 mm ceramic package is ideal for wireless

applications.

ECX-1637B

SMD CRYSTAL

ECX-1637B SMD CRYSTAL

• 2.0 x 1.6 mm Footprint

• Extended Temp. Range Option

• RoHS Compliant

DIMENSIONS (mm)

PART NUMBERING GUIDE: Example ECS-240-8-37B-CKY-TR

Figure 1) Top, Side, and Bottom

Crystal is symmetrical, pad 1 & 3 are interchangeable.

Chamfer on the bottom pad has no electrical

significance.

240 = 24.000 MHz

See P/N Guide

8 = 8 pF

10 = 10 pF

S=Series

-37B =

ECX-1637B

Blank = Std

A = ± 25 ppm

J = ± 20 ppm

R = ± 15 ppm

C = ± 10 ppm

7 = ± 7 ppm

TR =1K

TR3=3K

Qty/Reel

Rev.2022

ECS

* Specify available options in P/N.

† Contact ECS for availability over extended temp range.

Blank= Std

D= ±100 ppm

E = ± 50 ppm

G = ± 30 ppm

H = ± 25 ppm

T = ± 20 ppm †

W = ±15 ppm †

K = ± 10 ppm †

Blank= Std

L = -10 ~ +70°C

M = -20 ~ +70°C

Y = -30 ~ +85°C

N = -40 ~ +85°C

P = -40 ~ +105°C

S = -40 ~ +125°C

U = -55 ~ +125°C

Figure 2) Suggested land

pattern

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