ICS813252I-02 Datasheet, PDF (3/22 Pages) Integrated Device Technology – VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER

ICS813252I-02
VCXO JITTER ATTENUATOR & FEMTOCLOCK™ MULTIPLIER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 2
LF1, LF0
Analog
Input/Output
3
ISET
Analog
Input/Output
Loop filter connection node pins.
LF0 is the output. LF1 is the input.
Charge pump current setting pin.
4, 8, 18, 24
5
V_EE
CLK_SEL
Power
Input
Negative supply pins.
Pulldown
Input clock select. When HIGH selects CLK1/nCLK1.
When LOW, selects CLK0/nCLK0. LVCMOS/LVTTL interface levels.
6, 12, 27
7
V_CC
RESERVED
Power
Reserved
Core power supply pins.
Reserved pin. Do not connect.
9,
10,
11
PDSEL_2,
PDSEL_1,
PDSEL_0
Input
Pullup
Pre-divider select pins. LVCMOS/LVTTL interface levels.
See Table 3A.
13
V_CCA
Power
Analog supply pin.
14,
15
ODBSEL_1,
ODBSEL_0
Input
Pulldown
Frequency select pins for Bank B output. See Table 3B.
LVCMOS/LVTTL interface levels.
16,
17
ODASEL_1,
ODASEL_0
Input
Pulldown
Frequency select pins for Bank A output. See Table 3B.
LVCMOS/LVTTL interface levels.
19, 20
QA, nQA
Output
Differential Bank A clock outputs. LVPECL interface levels.
21
22, 23
V
CCO
QB, nQB
Power
Output
Output power supply pin.
Differential Bank B clock outputs. LVPECL interface levels.
25
nCLK1
Input
Pullup/
Pulldown
Inverting differential clock input. V_CC/2 bias voltage when left floating.
26
CLK1
Input
Pulldown Non-inverting differential clock input.
28
nCLK0
Input
Pullup/
Pulldown
Inverting differential clock input. V_CC/2 bias voltage when left floating.
29
CLK0
Input
Pulldown Non-inverting differential clock input.
30,
31
XTAL_OUT,
XTAL_IN
Input
Crystal oscillator interface. XTAL_IN is the input.
XTAL_OUT is the output.
32
V_CCX
Power
Power supply pin for VCXO charge pump.
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
IDT^™ / ICS^™ VCXO JITTER ATTENUATOR/MULTIPLIER
3
CS813252CKI-02 REV. A OCTOBER 22, 2008