5.0VDC or 3.3VDC • 8 PIN DIP • HCMOS/ TTL

LOW EMI SPREAD SPECTRUM CRYSTAL CLOCK OSCILLATORS

ASSH

29 Journey • Aliso Viejo, CA 92656 • USA

(949) 448-7070

•

ABRACON IS

ISO 9001 / QS 9000

CERTIFIED

NOTE: Left blank if standard • All specifications and markings subject to change without notice

Rev. 2.4

05/2003

ABRACON

®

CORPORA TION

ASSH - FREQUENCY - FREQ. STABILITY - BANDWIDTH

Fo in MHz as; XXX.XXXX

-R for ±25 ppm max

-K for ±30 ppm max

-H for ±35 ppm max

-C for ±50 ppm max

-Cx = Center Spread

(See table 3 for options)

Example: ASSH-048.0000-C-C4

Would be the part number for a 48.0000 MHz, ±5.0% center spread with a +/-50 ppm center frequency

accuracy .

ORDERING OPTION

STANDARD ELECTRICAL SPECIFICATIONS

PARAMETER

ASSH

Conditions

Operating Temperature

(Topr)

0

°C to +70°C

Storage Temperature

(Tsto)

- 65

°C to +150°C

Frequency Stability vs. Temp

(dF/Fo)

± 100 ppm max. (See Options)

Operating Supply Voltage (VDC)

3.3 VDC

5.0 VDC

+/-5 %

Frequency Range

(Fo)

15 – 90 MHz

15 – 120 MHz

Operating Input Current (IDD)

40 mA max

75 mA

F = 90 MHz

Duty Cycle

45/55

45/55

% max

Output Voltage

(VOH/VOL)

2.4 VDC min.

4.0 VDC min.

Rise Time

5.0 typ.

3.5 typ.

Load =15 pF, 10 –

90%

Fall Time

3.2 typ.

2.3 typ.

Load =15 pF, 10 –

90%

Start-up Time

10 ms max. 3 ms typ.

Aging

+/- 5ppm max. /year

Jitter

500 ps. max.

0

°C to +70°C

Output Load

10-LSTTL or 15 pF

Modulation Frequency (Fm)

20 – 40 kHz

15 – 120 MHz

FACTOR BANDWIDTH SELECTION OPTIONS:

BANDWIDTH %

Center Spread

± 0.625

C1

± 1.25

C2

± 2.50

C3

± 5.00

C4

Table 2

Table 3

FACTORY BANDWIDTH SELECTION (±10%)

Download Spread Spectrum Clocking application note on Abracon website at www.abracon.com/emi/ssc.

STANDARD ELECTRICAL SPECIFICATIONS

19