ICS84330C Datasheet, PDF (3/19 Pages) Integrated Circuit Systems – 700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84330C
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Name
Type
Description
V_CCA
XTAL1, XTAL2
Power
XTAL_SEL
Input
Pullup
Analog supply pin.
Crystal oscillator interface. XTAL1 is an oscillator input.
XTAL2 is an oscillator output.
Selects between the crystal oscillator or FREF_EXT inputs as the PLL reference
source. Selects XTAL inputs when HIGH. Selects FREF_EXT when LOW.
LVCMOS / LVTTL interface levels.
OE
Input Pullup Output enable. LVCMOS / LVTTL interface levels.
nP_LOAD
M0, M1, M2
M3, M4, M5
M6, M7, M8
N0, N1
Input
Input
Input
Pullup
Pullup
Pullup
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 transition 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.
Single-ended LVPECL interface levels.
V_CC
Power
nFOUT, FOUT Output
Core supply pins.
Differential output for the synthesizer. 3.3V LVPECL interface levels.
nc
Unused
No connect.
FREF_EXT
Input Pulldown PLL reference input. LVCMOS / LVTTL interface levels.
S_CLOCK
Input
Pulldown
Clocks the serial data present at S_DATA input into the shift register on the
rising edge of S_CLOCK. LVCMOS / LVTTL interface levels.
S_DATA
Input
Pulldown
Shift register serial input. Data sampled on the rising edge of S_CLOCK.
LVCMOS / LVTTL interface levels.
S_LOAD
Input
Pulldown
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
84330CV
www.icst.com/products/hiperclocks.html
3
REV. B DECEMBER 7, 2004