CMA8864-04 Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – I2C, Mixed Voltage clock Synthesizer with Buffer for PENTIUMTM & II CPU/PCI system

Ver. 1.2
6F, No. 100, Sec. 4, Civil Boulevard, Taipei, Taiwan
TEL: [phone] FAX: [phone]
WWW : http://www.cmedia.com.tw
CMA8864-04 I²C, Mixed Voltage clock Synthesizer with Buffer
(3 DIMM)
for PENTIUM^TM & II CPU/PCI system (CK3D)
FEATURES
l Supports Pentium and Pentium II CPUs.
l Two (2) copies of CPUCLK clock powered with
VDDL2, two (2) copies of CPUCLK powered
with VDD3..
l Twelve (12) SDRAM clocks powered by VDD3.
l Seven (7) copies of PCI clock (1/2 CPU clock or
asynchronous 2/5 CPU clock).
l IOAPIC clock @14.318MHz driven by VDDL1.
l 24/48 MHz outputs (3.3V TTL)
l Two Ref. Clock @ 14.318MHz (3.3V TTL).
l 60mA buffer switching current @3.3V.
l Optional common or mixed power supply mode
² VDD1, 2, 3 = VDDL2, 1 = 3.3V
² VDD1, 2, 3 = 3.3V; VDDL2, 1 = 2.5V
l < 250ps skew between CPU/SDRAM buffers.
l <500ps skew between PCI buffers.
l Power management controlled by CPU_STOP#,
PCI_STOP#.
l I²C Serial configuration interface.
l 48 pins SSOP package.
PIN CONFIGURATIONS
VDD1
1
*REF0 / CPU3.3#_2.5
2
GND
3
XTAL_IN
4
XTAL_OUT
5
VDD2
6
*PCICLK_F / FS1
7
*PCICLK1 / FS2
8
GND
9
PCICLK2
10
PCICLK3
11
PCICLK4
12
PCICLK5
13
VDD2
14
PCICLK6 / PCI_STOP#
15
GND
16
SDRAM12
17
SDRAM11
18
VDD3
19
SDRAM10
20
SDRAM9
21
GND
22
I²C
SDATA
SDCLK
23
24
48
VDDL1
47
IOAPIC
46
REF1 / CPU_STOP# 2.5V / 3.3V
45
GND
44
CPUCLK1
43
CPUCLK2
42
VDDL2
I/O PINS
41
CPUCLK3
40
CPUCLK4
39
GND
38
SDRAM1
37
SDRAM2
36
VDD3
35
SDRAM3
34
SDRAM4
33
GND
32
SDRAM5
31
SDRAM6
*Internal pull-up
30
VDD3
29
SDRAM7
resistor 240£ [ to 3.3V
28
SDRAM8
27
GND
on indicated pins.
26
48MHz / FS0*
25
24MHz / MODE*
POWER GROUPS
VDD1=REF, XTAL_IN, XTAL_OUT, PLL CORE
VDD3=SDRAM, 24/48MHz, CPUCLK3- 4
VDDL2=CPUCLK1-2
VDD2=PCICLK
VDDL1=IOAPIC
CMEI
1
CMA8864-04