ICS845204 Datasheet, PDF (2/13 Pages) Integrated Device Technology – CRYSTAL-TO-MLVDS PCI EXPRESS™ CLOCK SYNTHESIZER W/SPREAD SPECTRUM

ICS845204
CRYSTAL-TO-MLVDS CLOCK SYNTHESIZER W/SPREAD SPECTRUM
ADVANCE INFORMATION
Table 1. Pin Descriptions
Number
Name
1
OE0
2, 11
3, 4
5
6, 8, 18, 23,
24, 27
7
9
10,
19
V_DD
nQ3, Q3
V_DDO
nc
FSEL0
FSEL1
SSC0,
SSC1
12
OE3
13,
XTAL_IN
14
XTAL_OUT
15
OE2
16, 17, 22, 30
20, 21
25, 26
28
29
GND
nQ2, Q2
nQ1, Q1
V_DDA
OE1
31, 32
nQ0, Q0
Type
Input
Pullup
Power
Output
Power
Description
Output enable pin for Q0/nQ0 outputs. Logic High, outputs are enabled.
Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.
Core supply pins.
Differential output pair. M-LVDS interface levels.
Output supply pin.
Unused
No connect.
Input
Input
Pullup Output frequency select pins. See Table 3A. LVCMOS/LVTTL interface levels.
Pulldown Output frequency select pin. See Table 3A. LVCMOS/LVTTL interface levels.
Input
Pullup Spread spectrum control pins. See Table 3B. LVCMOS/LVTTL interface levels.
Input
Pullup
Output enable pin for Q3/nQ3 outputs. Logic High, outputs are enabled.
Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.
Input
Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output.
Input
Power
Output
Output
Power
Input
Output
Pullup
Pullup
Output enable pin for Q2/nQ2 outputs. Logic High, outputs are enabled.
Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.
Power supply ground.
Differential output pair. M-LVDS interface levels.
Differential output pair. M-LVDS interface levels.
Analog supply pin.
Output enable pin for Q1/nQ1 outputs. Logic High, outputs are enabled.
Logic LOW, outputs are in Hi-Z. LVCMOS/LVTTL interface levels.
Differential output pair. M-LVDS interface levels.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Symbol
Parameter
C_IN
R_PULLUP
R_PULLDOWN
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
IDT™ / ICS™ M-LVDS CLOCK SYNTHESIZER
2
ICS845204AK SEPTEMBER 25, 2007