Actual size

Crystal unit

Specifications (characteristics)

Item

Symbol

Specifications

Conditions / Remarks

FC-135

FC-135

FC-255

FC-255

Nominal frequency range

f_nom

32.768 kHz

32 kHz to

77.5 kHz

32.768 kHz

32 kHz to

100 kHz

Please contact us about available

frequencies.

Storage temperature

T_stg

-55

C to +125 C

Storage as single product.

Operating temperature

T_use

-40

C to +85 C

Level of drive

DL

0.5

W (1.0 W Max.)

0.5

W Max.

Please contact us if you require

1.0

W Max.

Frequency tolerance

(standard)

f_tol

+25

C, DL=0.1 W

Please ask for tighter tolerance

Turnover temperature

Ti

+25

C 5 C

Parabolic coefficient

B

-0.04

Load capacitance

CL

7 pF, 9 pF, 12.5 pF

7 pF, 12.5 pF

Please specify

Motional resistance (ESR)

R1

70 k

 Max.

70 k

 to

45 k



65 k

 Max.

70 k

 to

30 k



Motional capacitance

C1

3.4 fF Typ.

3.7 fF to

1.6 fF

2.0 fF Typ.

2.3 fF to

0.6 fF

Shunt capacitance

C0

1.0 pF Typ.

1.3 pF to

0.5 pF

1.3 pF Typ.

1.7 pF to

0.9 pF

Frequency aging

f_age

+25

C, First year

External dimensions

.

Footprint (Recommended)

(Unit:mm)

kHz RANGE CRYSTAL UNIT

LOW PROFILE SMD

Frequency range

:

32.768 kHz (32 kHz to 100 kHz)

External dimensions : 3.2 × 1.5 × 0.80 mm ···FC-135

:

4.9 × 1.8 × 0.80 mm ···FC-255

Overtone order

:

Fundamental

Applications

:

Small communications devices

Product Number (please contact us)

FC-135

: Q1xFC1350xxxx00

FC-255

: Q1xFC2550xxxx00

1.0

2.5

3.2±0.1

A501J

0.75

1.7

#1

#2

FC-135

#1

#2

Internal

Connection

FC-255

4.9±0.1

A501J

0.85

3.2

#1

#2

#1

#2

Internal

Connection

1.3

4.2

FC-255

FC-135

FC-255

FC-135

Do not design any circuit patterns in the shaded area.