74

ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM

CRYSTAL FILTERS

CRYSTAL FILTERS

NOMINAL

NUMBER

PASSBAND

RIPPLE

INSERTION

STOPBAND

STOPBAND

GUARANTEED

TERMINATING

MODEL

OF

3dB MIN.

MAX.

LOSS MAX.

MAX.

MAX.

ATTENUATION

IMPEDANCE

CASE

(MHz)

POLES

(KHz)

(dB)

(dB)

(dB) (KHz)

(dB) (KHz)

(Ohms/pF)

35 +300 ~ +1000

ECS-10.7-7.5A

10.7

2

±3.75

0.5

1.5

20 ±18

50 -200 ~ -1000

1800//5.0

HC-49/U

65 +300 ~ +1000

ECS-10.7-7.5B

10.7

4

±3.75

1.0

2.5

40 ±14

80 -200 ~ -1000

1800//4.0

HC-49/U x 2

ECS-10.7-7.5C

10.7

6

±3.75

2.0

3.5

45 ±8.75

65 ±12.5

65 ±12.5 ~ ±300

1800//3.5

SC-3

ECS-10.7-7.5D

10.7

8

±3.75

2.0

4.0

65 ±8.75

90 ±12.5

90 ±12.5 ~ ±300

1800//3.5

SC-4

ECS-21K7.5A

21.4

2

±3.75

0.5

2.0

18 ±12.5

75 -910

1500//6.0

UM-1

ECS-21K7.5B

21.4

4

±3.75

1.0

2.5

35 ±12.5

90 ±910

850//5.0

UM-1 x 2

ECS-21K7.5C

21.4

6

±3.75

2.0

3.0

45 ±8.75

65 ±12.5

65 ±12.5 ~ ±300

850//5.0

SC-1

ECS-21K7.5D

21.4

8

±3.75

2.0

4.0

65 ±9

90 ±12.5

90 ±12.5 ~ ±300

850//5.0

SC-1

ECS-21K7.5E

21.4

10

±3.75

2.0

4.5

75 ±8.75

90 ±10.5

90 ±12.5 ~ ±300

850//5.0

SC-2

MONOLITHIC CRYSTAL FILTERS

ELECTRICAL CHARACTERISTICS (10.7 and 21.4 MHz)

For 12.5 KHz Channel Spacing (Operating Temperature -20 to +70˚C)

ECS’s Monolithic Crystal Filters have very

high Q’s and excellent temperature and

aging characteristics. These filters offer

narrow and intermediate bandwidths. The

monolithic crystal filter is smaller and more

cost effective than a discrete crystal

filter. With the addition of coupling

capacitors between two-pole sections, they

can be cascaded to produce four, six and

eight (or more) pole filter responses.

FEATURES

• High stability for wide temperature ranges

• Sharp cut-off

• RoHS Compliant (Pb Free)

NOMINAL

NUMBER

PASSBAND

RIPPLE

INSERTION

STOPBAND

STOPBAND

GUARANTEED

TERMINATING

MODEL

OF

3dB MIN.

MAX.

LOSS MAX.

MAX.

MAX.

ATTENUATION

IMPEDANCE

CASE

(MHz)

POLES

(KHz)

(dB)

(dB)

(dB) (KHz)

(dB) (KHz)

(Ohms/pF)

35 +300 ~ +1000

ECS-10.7-12A

10.7

2

±6.0

0.5

2.0

18 ±23

40 -200 ~ -1000

2500//2.5

HC-49/U

65 +300 ~ +1000

MF 10.7-12B

10.7

4

±6.0

1.0

2.5

40 ±20

80 -200 ~ -1000

2500//1.5

HC-49/U x 2

MF 10.7-12C

10.7

6

±6.0

2.0

3.0

45 ±14

60 ±20

65 ±20 ~ ±300

2800//1.0

SC-3

MF 10.7-12D

10.7

8

±6.0

2.0

4.0

65 ±14

90 ±20

90 ±20 ~ ±300

2800//1.0

SC-4

35 +350 ~ +1000

ECS-21K12A

21.4

2

±6.0

0.5

2.0

18 ±23

50 -200 ~ -1000

1200//3.0

UM-1

65 +350 ~ +1000

ECS-21K12B

21.4

4

±6.0

1.0

2.5

40 ±20

70 -200 ~ -1000

1200//2.5

UM-1 x 2

ECS-21K12C

21.4

6

±6.0

2.0

3.0

45 ±14

65 ±20

65 ±20 ~ ±300

1200//2.5

SC-1

ECS-21K12D

21.4

8

±6.0

2.0

4.0

65 ±14

90 ±20

90 ±20 ~ ±300

1200//2.5

SC-1

For 20 KHz Channel Spacing (Operating Temperature -20 to +70˚C)