ICS8430252-45 Datasheet, PDF (2/13 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS8430252-45
FEMTOCLOCKS™CRYSTAL-TO-3.3V LVPECL
FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
1
OE
Input Pullup
2, 9, 15
3
4
5, 6
7
8
10, 11
12
13, 14
V_EE
QA
V_{CCO_A}
nc
V_CCA
V_CC
XTAL_OUT,
XTAL_IN
V_{CCO_B}
nQB, QB
Power
Output
Power
Unused
Power
Power
Input
Power
Output
16
CLK_EN Input Pullup
Description
Output enable pin. LVCMOS/LVTTL interface levels.
See Table 3A Function Table.
Negative supply pin.
LVCMOS/LVTTL clock output.
Output supply pin for QA output.
No connect.
Analog supply pin.
Core supply pin.
Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output.
Output supply pin for QB, nQB outputs.
Differential clock outputs. LVPECL interface levels.
Clock enable pin. LVCMOS/LVTTL interface levels.
See Table 3B Function Table.
TABLE 2. PIN CHARACTERISTICS
Symbol Parameter
C_IN
C_PD
R_PULLUP
Input Capacitance
Power Dissipation Capacitance
Input Pullup Resistor
Test Conditions
V_CC, V_CCA, V_{CCO_A,} V_{CCO_B} = 3.465V
Minimum Typical Maximum Units
4
pF
10
pF
51
kΩ
TABLE 3A. OE SELECT FUNCTION TABLE
Input
OE
0
1
Output
QA
Hi-Z
Active
TABLE 3B. CLK_EN SELECT FUNCTION TABLE
Input
CLK_EN
0
1
Outputs
QB
nQB
Low
High
Active
Active
8430252CG-45
www.icst.com/products/hiperclocks.html
2
REV. B DECEMBER 9, 2005