ICS874005-04 Datasheet, PDF (2/13 Pages) Integrated Device Technology – PCI EXPRESS™ JITTER ATTENUATOR

ICS874005-04
PCI EXPRESS™ JITTER ATTENUATOR
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 24
nQB2, QB2 Output
Differential output pair. LVDS interface levels.
2, 3
nQA1, QA1 Output
Differential output pair. LVDS interface levels.
4, 23
5, 6
7
8
V_DDO
QA0, nQA0
MR
BW_SEL
Power
Output
Input
Input
Output supply pins.
Differential output pair. LVDS interface levels.
Pulldown
Active HIGH Master Reset. When logic HIGH, the internal dividers are
reset causing the true outputs (Qx) to go low and the inverted outputs
(nQx) to go high. When logic LOW, the internal dividers and the outputs
are enabled. LVCMOS/LVTTL interface levels.
Pulldown PLL bandwidth input. See Table 3B. LVCMOS/LVTTL interface levels.
9
V_DDA
Power
Analog supply pin.
10
F_SELA
Input
Pulldown
Frequency select pin for QAx/nQAx outputs. See Table 3C.
LVCMOS/LVTTL interface levels.
11
V_DD
Power
Core supply pin.
Output enable pin for QA pins. When HIGH, the QAx/nQAx outputs are
12
OEA
Input Pullup active. When LOW, the QAx/nQAx outputs are in a high impedance
state. LVCMOS/LVTTL interface levels. See Table 3A.
13
CLK
Input Pulldown Non-inverting differential clock input.
14
nCLK
Input Pullup Inverting differential clock input.
15, 16
17
18
19, 20
GND
OEB
F_SELB
nQB0, QB0
Power
Input
Input
Output
Pullup
Pulldown
Power supply ground.
Output enable pin for QB pins. When HIGH, the QBx/nQBx outputs are
active. When LOW, the QBx/nQBx outputs are in a high impedance
state. LVCMOS/LVTTL interface levels. See Table 3A.
Frequency select pin for QBx/nQBx outputs. See Table 3C.
LVCMOS/LVTTL interface levels.
Differential output pair. LVDS interface levels.
21, 22
nQB1, QB1 Output
Differential output pair. 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
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^™ PCI EXPRESS™ JITTER ATTENUATOR
2
ICS874005AG-04 REV. A JULY 29, 2008