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W83194R-39A PDF даташит

Спецификация W83194R-39A изготовлена ​​​​«Winbond» и имеет функцию, называемую «100MHZ 3-DIMM CLOCK».

Детали детали

Номер произв W83194R-39A
Описание 100MHZ 3-DIMM CLOCK
Производители Winbond
логотип Winbond логотип 

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W83194R-39A Даташит, Описание, Даташиты
W83194R-39/-39A
1.0 GENERAL DESCRIPTION
100MHZ 3-DIMM CLOCK
The W83194R-39/-39A is a Clock Synthesizer which provides all clocks required for high-speed RISC
or CISC microprocessor such as Intel Pentium II. W83194R-39 provides eight different frequency of
CPU and PCI clocks and W83194R-39A provides sixteen CPU/PCI frequencies which are externally
selectable with smooth transitions. W83194R-39/-39A also provides 13 SDRAM clocks controlled by
the none-delay buffer_in pin.
The W83194R-39/-39A accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V
supply. Spread spectrum built in at ¡Ó0.5% or ¡Ó0.25% to reduce EMI. Programmable stopping
individual clock outputs and frequency selection through I2C interface. The device meets the
Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after
power-up. It is not recommend to use the dual function pin for the slots(ISA, PCI, CPU, DIMM). The
add on cards may have a pull up or pull down.
High drive six PCI and thirteen SDRAM CLOCK outputs typically provide greater than 1 V /ns slew
rate into 30 pF loads. Two CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20
pF loads as maintaining 50¡Ó 5% duty cycle. The fixed frequency outputs as REF, 24MHz, and 48
MHz provide better than 0.5V /ns slew rate.
2.0 PRODUCT FEATURES
Supports PentiumII CPU with I2C.
2 CPU clocks (one free-running CPU clock)
13 SDRAM clocks for 3 DIMs
6 PCI synchronous clocks
One IOAPIC clock for multiprocessor support
Optional single or mixed supply:
(Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.3V) or (Vddq1= Vddq2 = Vddq3=Vddq4 =
3.3V, VddL1 = VdqL2 = 2.5V)
< 250ps skew among CPU and SDRAM clocks
< 250ps skew among PCI clocks
< 5ns propagation delay SDRAM from buffer input
Skew from CPU(earlier) to PCI clock -1 to 4ns, center 2.6ns.
Smooth frequency switch with selections from 50 MHz to 133 MHz CPU
I2C 2-Wire serial interface and I2C read back
Publication Release Date: May 1998
- 1 - Revision 0.20









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W83194R-39A Даташит, Описание, Даташиты
W83194R-39/-39A
¡Ó0.25% or ¡Ó0.5% spread spectrum function to reduce EMI
Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
2ms power up clock stable time
MODE pin for power Management
One 48 MHz for USB & one 24 MHz for super I/O
48-pin SSOP package
PRELIMINARY
3.0 BLOCK DIAGRAM
Xin
Xout
BUFFER IN
FS(0:2)* 3
MODE*
CPU_STOP#
PCI_STOP#
SDATA*
SDCLK*
W83194R-39
PLL2
~
XTAL
OSC
1/2
STOP
6
PLL1
Spread
Spectrum
LATCH
~
POR
4
Control
Logic
Config.
Reg.
STOP
STOP
PCI
Clock STOP
Divider
48MHz
24MHz
IOAPIC
REF(0:1)
2
CPUCLK_F
CPUCLK1
Xin
Xout
BUFFER IN
SDRAM(0:12)
13
FS(0:3)* 4
MODE*
PCICLK(0:4)
5
PCICLK_F CPU_STOP#
PCI_STOP#
SDATA*
SDCLK*
W83194R-39A
PLL2
~
XTAL
OSC
1/2
STOP
6
PLL1
Spread
Spectrum
LATCH
~
POR
4
STOP
STOP
PCI
Clock
Divider
STOP
Control
Logic
Config.
Reg.
48MHz
24MHz
IOAPIC
REF(0:1)
2
CPUCLK_F
CPUCLK1
SDRAM12
SDRAM(0:11)
12
PCICLK(0:4)
5
PCICLK_F
Publication Release Date: May 1998
- 2 - Revision 0.20









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W83194R-39A Даташит, Описание, Даташиты
4.0 PIN CONFIGURATION
Vddq1
PCI_STOP#/REF0
Vss
Xin
Xout
Vddq2
PCICLK_F/MODE*
(W83194R-39A ) PCICLK0/FS3*
Vss
PCICLK1
PCICLK2
PCICLK3
PCICLK4
Vddq2
BUFFER IN
Vss
SDRAM11
SDRAM10
Vddq3
SDRAM 9
SDRAM 8
Vss
SDATA
SDCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
5.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
# - Active Low
* - Internal 250kpull-up
W83194R-39/-39A
PRELIMINARY
48 VddL1
47 IOAPIC
46 REF1/FS2*
45 Vss
44 CPUCLK_F
43 CPUCLK1
42 VddL2
41 CPU_STOP#
40 SDRAM12
39 Vss
38 SDRAM 0
37 SDRAM 1
36 Vddq3
35 SDRAM 2
34 SDRAM 3
33 Vss
32 SDRAM 4
31 SDRAM 5
30 Vddq3
29 SDRAM 6
28 SDRAM 7
27 Vddq4
26 48MHz/FS0*
25 24MHz/FS1*
Publication Release Date: May 1998
- 3 - Revision 0.20










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Номер в каталогеОписаниеПроизводители
W83194R-39100MHZ 3-DIMM CLOCKWinbond
Winbond
W83194R-39A100MHZ 3-DIMM CLOCKWinbond
Winbond

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