ICS841S01 Datasheet, PDF (2/16 Pages) Integrated Device Technology – PCI EXPRESS™ CLOCK GENERATOR

ICS841S01
PCI EXPRESS™ CLOCK GENERATOR
PRELIMINARY
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1, 6
2, 5, 16
3, 4
V_{SS_SRC}
V
DD_SRC
SRCT0, SRCC0
Power
Power
Output
Ground for core and SRC outputs.
Power supply for core and SRC outputs.
Differential output pair. HCSL interface levels.
A fixed precision resistor (475Ω) from this pin to ground provides a
7
IREF
Input
reference current used for differential current-mode SRCC0, SRCT0
clock outputs.
8
V_SSA
Power
Analog ground pin.
9
V_DDA
Power
Power supply for PLL.
10
V_{SS_REF}
Power
Ground for crystal interface
11
V_{DD_REF}
Power
12,
13
XTAL_IN, XTAL_OUT Input
Power supply for crystal interface.
Crystal oscillator interface. XTAL_IN is the input.
XTAL_OUT is the output.
SMBus compatible SCLK. This pin has an internal pullup resistor, but
14
SCLK
Input Pullup is in high impedance in powerdown mode.
LVCMOS/LVTTL interface levels.
15
SDATA
Input/
Output
SMBus compatible SDATA. This pin has an internal pullup resistor,
Pullup but is in high impedance in powerdown mode.
LVCMOS/LVTTL 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
C_OUT
Parameter
Input Capacitance
Input Pullup Resistor
Output Pin Capacitance
Test Conditions
Minimum
Typical
4
51
4
Maximum
Units
pF
kΩ
pF
IDT^™ / ICS^™ PCI EXPRESS CLOCK GENERATOR
2
ICS841S01BG REV. B MAY 23, 2007