ICS874003-05 Datasheet, PDF (3/18 Pages) Integrated Device Technology – PCI EXPRESS™ JITTER ATTENUATOR

ICS874003-05
PCI EXPRESS™ JITTER ATTENUATOR
Table 1. Pin Descriptions
Number
1, 20
2, 19
3, 4
Name
QA1, nQA1
V_DDO
QA0, nQA0
Type
Output
Power
Output
Description
Bank A differential output pair. LVDS interface levels.
Output supply pins.
Bank A differential output pair. LVDS interface levels.
5
6,
9,
16
7
8
10
11
12
13
14
15
17, 18
MR
F_SEL0,
F_SEL1,
F_SEL2
nc
V_DDA
V_DD
OEA
CLK
nCLK
GND
OEB
nQB0, QB0
Input
Input
Unused
Power
Power
Input
Input
Input
Power
Input
Output
Pulldown
Active HIGH Master Reset. When logic HIGH, the internal dividers are 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.
Pulldown
Frequency select pin for QAx/nQAx and QB0/nQB0 outputs.
LVCMOS/LVTTL interface levels.
Pullup
Pulldown
Pullup
Pullup
No connect.
Analog supply pin.
Core supply pin.
Output enable pin for QA pins. When HIGH, the QAx/nQAx outputs are active.
When LOW, the QAx/nQAx outputs are in a high-impedance state.
LVCMOS/LVTTL interface levels.
Non-inverting differential clock input.
Inverting differential clock input.
Power supply ground.
Output enable pin for QB0 pins. When HIGH, the QB0/nQB0 outputs are active.
When LOW, the QB0/nQB0 outputs are in a high-impedance state.
LVCMOS/LVTTL interface levels.
Bank B 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
Parameter
C_IN
Input Capacitance
R_PULLUP
Input Pullup Resistor
R_PULLDOWN Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
kΩ
kΩ
Table 3. Output Enable Function Table
Inputs
OEA
OEB
0
0
1 (default) 1 (default)
Outputs
QA[0:1], nQA[0:1]
QB0, nQB0
High Impedance
High Impedance
Enabled
Enabled
IDT™ / ICS™ PCI EXPRESS™ JITTER ATTENUATOR
3
ICS874003BG-05 REV. A APRIL 15, 2009