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CDC925 датащи(PDF) 3 Page - Texas Instruments

номер детали CDC925
подробное описание детали  133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS WITH 3-STATE OUTPUTS
PDF  18 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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CDC925 датащи(HTML) 3 Page - Texas Instruments

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CDC925
133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS
WITH 3-STATE OUTPUTS
SCAS633 – JULY 28, 1999
3
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
3V66 [0–3]
21, 22, 25, 26
O
3.3 V, Type 5, 66-MHz clock outputs
48MHz
30
O
3.3 V, Type 3, 48-MHz clock output
APIC [0–2]
53, 54, 55
O
2.5 V, Type 1, APIC clock outputs
CPU [0–3]
41, 42, 45, 46
O
2.5 V, Type 1, CPU clock outputs
CPU_DIV2 [0–1]
49, 50
O
2.5 V, Type 1, CPU_DIV2 clock outputs
CPU_STOP
36
I
Disables CPU clock to low state
GND
1, 7, 13, 19,
20, 24, 29, 38,
40, 44, 48, 52
Ground
PCI [1–7]
9, 11, 12, 14,
15, 17, 18
O
3.3 V, Type 5, 33-MHz PCI clock outputs
PCI_F
8
O
Free-running 3.3-V, Type 5, 33-MHz PCI clock output
PCI_STOP
37
I
Disables PCI clock to low state
PWR_DWN
35
I
Power down for complete device with outputs forced low
REF0, REF1
2, 3
O
3.3 V, Type 3, 14.318-MHz reference clock output
SEL0, SEL1
32, 33
I
LVTTL level logic select terminals for function selection
SEL133/100
28
I
LVTTL level logic select pins for enabling 100/133 MHz
SPREAD
34
I
Disables SSC function
VDD3.3V
4, 10, 16, 23,
27, 31, 39
Power for the 3V66, 48MHz, PCI, REF outputs and CORE logic
VDD2.5V
43, 47, 51, 56
Power for CPU and APIC outputs
XIN
5
I
Crystal input – 14.318 MHz
XOUT
6
O
Crystal output – 14.318 MHz



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