ICS843001I-23 Datasheet, PDF (2/24 Pages) Integrated Circuit Systems – FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER

ICS843001I-23 Data Sheet
FEMTOCLOCK^® CRYSTAL/LVCMOS-TO-LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Table 1. Pin Descriptions
Number
1
2, 3
4
5
6, 7
8, 23
9
10
11,
12
13,
14
15
16, 17
18
19, 20, 21
22
24
Name
V_{CCO_LVCMOS}
N0, N1
N2
V_{CCO_LVPECL}
Q, nQ
V_EE
V_CCA
V_CC
XTAL_OUT1,
XTAL_IN1
XTAL_OUT0,
XTAL_IN0
CLK
SEL0, SEL1
MR
M0, M1, M2
OE_REF
REF_OUT
Type
Power
Input
Pulldown
Input
Pullup
Power
Output
Power
Power
Power
Input
Input
Input
Input
Pulldown
Pulldown
Input
Pulldown
Input
Input
Output
Pullup
Pulldown
Description
Output supply pin for REF_CLK output.
Output divider select pins. LVCMOS/LVTTL interface levels. See Table 3C.
Output supply pin for LVPECL output.
Differential output pair. LVPECL interface levels.
Negative supply pins.
Analog supply pin.
Core supply pin.
Parallel resonant crystal interface.
XTAL_OUT1 is the output, XTAL_IN1 is the input.
Parallel resonant crystal interface.
XTAL_OUT0 is the output, XTAL_IN0 is the input.
Single-ended clock input. LVCMOS/LVTTL interface levels.
Input MUX select pins. LVCMOS/LVTTL interface levels. See Table 3D.
Active HIGH Master Reset. When logic HIGH, the internal dividers are reset
causing the true output Q to go low and the inverted output nQ to go high.
When logic LOW, the internal dividers and the outputs are enabled.
LVCMOS/LVTTL interface levels.
Feedback divider select pins. LVCMOS/LVTTL interface levels. See Table 3B.
Reference clock output enable. Default LOW. See Table 3E.
LVCMOS/LVTTL interface levels.
Reference clock output. 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
Parameter
C_IN
Input Capacitance
R_PULLUP
Input Pullup Resistor
R_PULLDOWN Input Pulldown Resistor
R_OUT
Output Impedance
REF_OUT
Test Conditions
V_CCO = 3.3V
V_CCO = 2.5V
Minimum
Typical
4
51
51
21
25
Maximum
Units
pF
kΩ
kΩ
Ω
Ω
ICS843001CGI-23 REVISION A OCTOBER 4, 2011
2
©2011 Integrated Device Technology, Inc.