ICS84329B Datasheet, PDF (3/19 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84329B
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Name
Type
Description
V_CCA
XTAL_IN,
XTAL_OUT
OE
Power
Input
Input
nP_LOAD
Input
M0, M1, M2, M3,
M4, M5, M6, M7, M8
N0, N1
Input
Input
Pullup
Pullup
Pullup
Pullup
Analog supply pin.
Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output.
Output enable. When logic HIGH, the outputs are enabled (default).
When logic LOW, the outputs are disabled and drive differential low:
FOUT = LOW, nFOUT = HIGH. LVCMOS / LVTTL interface levels.
Parallel load input. Determines when data present at M8:M0 is loaded into
M divider, and when data present at N1:N0 sets the N output divide value.
LVCMOS / LVTTL interface levels.
M divider inputs. Data latched on LOW-to-HIGH transistion of nP_LOAD input.
LVCMOS / LVTTL interface levels.
Determines N output divider value as defined in Table 3C Function Table.
LVCMOS / LVTTL interface levels.
V_EE
TEST
Power
Output
Negative supply pins.
Test output which is used in the serial mode of operation.
LVCMOS / LVTTL interface levels.
V
CC
nFOUT, FOUT
S_CLOCK
S_DATA
S_LOAD
Power
Output
Input
Input
Input
Core supply pins.
Pulldown
Pulldown
Pulldown
Differential output for the synthesizer. 3.3V LVPECL interface levels.
Clocks the serial data present at S_DATA input into the shift register on the
rising edge of S_CLOCK. LVCMOS / LVTTL interface levels.
Shift register serial input. Data sampled on the rising edge of S_CLOCK.
LVCMOS / LVTTL interface levels.
Controls transition of data from shift register into the M divider.
LVCMOS / LVTTL interface levels.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLUP
R_PULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
84329BV
www.icst.com/products/hiperclocks.html
3
REV. B JANUARY 18, 2006