ICS843003 Datasheet, PDF (3/17 Pages) Integrated Circuit Systems – FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLDOWN
R
PULLUP
Parameter
Input Capacitance
Input Pulldown Resistor
Input Pullup Resistor
ICS843003
FEMTOCLOCKS™CRYSTAL-TO-3.3V LVPECL
FREQUENCY SYNTHESIZER
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
KΩ
KΩ
TABLE 3A. BANK A FREQUENCY TABLE
Inputs
Crystal Frequency DIV_SELA1 DIV_SELA0
31.25
0
0
31.25
31.25
31.25
0
1
1
0
1
1
26.041666
0
0
26.041666
0
1
26.041666
1
0
26.041666
1
1
FB_DIV
0
0
0
0
1
1
1
1
Feedback
Divider
20
20
20
20
24
24
24
24
Bank A
Output Divider
1
2
4
5
1
2
4
5
M/N
Multiplication
Factor
20
10
5
4
24
12
6
4.8
QA0/nQA0
Output
Frequency
625
312.5
156.25
125
625
312.5
156.25
125
TABLE 3B. BANK B FREQUENCY TABLE
Inputs
Crystal Frequency DIV_SELA1 DIV_SELA0
31.25
0
0
31.25
0
1
31.25
1
0
31.25
1
1
26.041666
0
0
26.041666
0
1
26.041666
1
0
26.041666
1
1
FB_DIV
0
0
0
0
1
1
1
1
Feedback
Divider
20
20
20
20
24
24
24
24
Bank B
Output Divider
1
2
4
5
1
2
4
5
M/N
Multiplication
Factor
20
10
5
4
24
12
6
4.8
QBx/nQBx
Output
Frequency
625
312.5
156.25
125
625
312.5
156.25
125
843003AG
www.icst.com/products/hiperclocks.html
3
REV. A JULY 27, 2004