841S104EGILF Datasheet, PDF (2/22 Pages) Integrated Device Technology – Crystal-to-HCSL 100MHz PCI ExpressTM Clock Synthesizer

ICS841S104I Data Sheet
CRYSTAL-TO-HCSL 100MHZ PCI EXPRESS^TM CLOCK SYNTHESIZER
Table 1. Pin Descriptions
Number
1, 2
3, 9, 11, 13, 16
4, 10, 17, 22
5, 6
7, 8
12
14
15
18,
19
20
21
23, 24
Name
SRCT3, SRCC3
V_SS
V_DD
SRCT2, SRCC2
SRCT1, SRCC1
IREF
V_DDA
nc
XTAL_IN,
XTAL_OUT
SCLK
SDATA
SRCT4, SRCC4
Type
Output
Power
Power
Output
Output
Input
Power
Unused
Description
Differential output pair. HCSL interface levels.
Power supply ground.
Positive supply pins.
Differential output pair. HCSL interface levels.
Differential output pair. HCSL interface levels.
An external fixed precision resistor (475Ω) from this pin to ground provides a
reference current used for differential current-mode SRCCx, SRCTx clock
outputs.
Analog supply for PLL.
No connect.
Input
Input
I/O
Output
Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output.
Pullup
Pullup
I²C compatible SCLK. This pin has an internal pullup resistor.
LVCMOS/LVTTL interface levels.
I²C compatible SDATA. This pin has an internal pullup resistor. Open drain.
LVCMOS/LVTTL interface levels.
Differential output pair. HCSL interface levels.
NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 2. Pin Characteristics
Symbol
C_IN
R_PULLUP
Parameter
Input Capacitance
Input Pullup Resistor
Test Conditions
Minimum
Typical
2
51
Maximum
Units
pF
kΩ
ICS841S104EGI REVISION A JUNE 18, 2010
2
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