ICS871004I-04 Datasheet, PDF (2/15 Pages) Integrated Device Technology – DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR

ICS871004I-04
DIFFERENTIAL-TO-0.7V DIFFERENTIAL PCI EXPRESS™ JITTER ATTENUATOR
PRELIMINARY
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 24
nQ0, Q0
Output
Differential output pair. PCI Express interface levels.
2, 3
nQ2, Q2
Output
Differential output pair. PCI Express interface levels.
4, 11, 23
5
6, 15, 16
V_DD
IREF
GND
Power
Input
Power
Core supply pin.
A fixed precision resistor (475Ω) from this pin to ground provides a
reference current used for differential current-mode QAx/nQAx and
QBx/nQBx clock outputs.
Power supply ground.
Active HIGH Master Reset. When logic HIGH, the internal dividers are
7
MR
Input
Pulldown
reset causing the true outputs (nQx) to go low and the inverted outputs
(Qx) to go high. When logic LOW, the internal dividers and the outputs
are enabled. LVCMOS/LVTTL interface levels.
8
BW_SEL0
Input
Pullup
Selects PLL Bandwidth input. LVCMOS/LVTTL interface levels.
See Table 3B.
9
V_DDA
Power
Analog supply pin.
10,
17
F_SEL0,
F_SEL1
Input
Pulldown
Frequency select pins. LVCMOS/LVTTL interface levels.
See Table 3C.
12
OE
Input
Pullup
Output enable pin. When HIGH, the outputs are active. When LOW, the
outputs are in a high impedance state. LVCMOS/LVTTL interface levels.
13
CLK
Input Pulldown Non-inverting differential clock input.
14
nCLK
Input Pullup Inverting differential clock input.
18
BW_SEL1
Input
Pulldown
Selects PLL Bandwidth input. LVCMOS/LVTTL interface levels.
See Table 3B.
19, 20
nQ3, Q3
Output
Differential output pair. PCI Express interface levels.
21, 22
nQ1, Q1
Output
Differential output pair. PCI Express 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
IDT^™ / ICS^™ 0.7V DIFFERENTIAL JITTER ATTUNUATOR
2
ICS871004AGI-04 REV A JANUARY 17, 2008