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参数资料
| 型号： | IMISC464APB |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 80 MHz, PROC SPECIFIC CLOCK GENERATOR, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 1/8页 |
| 文件大小： | 77K |
| 代理商： | IMISC464APB |
SC464
Motherboard Clock Chip
Approved Product
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
Rev. 1.1
5/22/97
MILPITAS, CA 95035. TEL: 408-263-6300. FAX 408-263-6571
Page 1 of 8
PRODUCT FEATURES
T Generates All Essential Clock Signals for the
Motherboards
T 4V to 7V Operating Supply Range
T Supports 8086, 80286, 80386 and 80486 Including
S Series and Pentium Based Designs
T Supports ISA, VESA, and PCI Based Designs
T Supports GREEN PC Applications
T On-Chip Dual Quad Buffers
T Integrates CPU Clock and Buffered 14.318 MHz
Output
T Wide Range of Selectable Output Frequencies
Including 80, 66.6, 60, 50, 40, 33.3, 30, 25, 16 and
8 MHz.
T Doze Mode for Low Power Consumption
T Single, Low Cost Crystal (14.318 MHz Used as
Reference Frequency
T Smooth
and
Glitch-Free
Switching
for
Programmable Clock Generator
T 50% Duty Cycle
T TTL or CMOS compatible Outputs
T Low, Short and Long Term Jitter
T 28 PDIP and 28 Pin SSOP (209 Mil Body) Package
Options
BLOCK DIAGRAM
REF
CLOCK GEN
14.318
MHz
DOZE#
LF1
SO
S1
S2
B1IN
REF14
MCLK2
MCLK1
B1OUT1
ST#
B1OUT2
B1OUT3
B1OUT4
B2IN
B2OUT1
B2OUT2
B2OUT3
B2OUT4
APPLICATIONS
IMISC464 eliminates the need for multiple oscillators
and generates all the essential clock signals for the
Personal Computer Motherboards.
Supports 8086,
80286,
80386SX,
80386DX,
80486SX,
80486DX,
80486DX2, 80486 S Series and Pentium based
designs. IMISC464 can be used with Green PC, laptop
or notebook computers to save power by running the
system slower than normal CPU speeds.
FREQUENCY TABLE
INPUTS
MCLK1 AND MCLK2 OUTPUTS (MHz)
DOZE# = 0
S2
S1
S0
DOZE# = 1
ST# = 1
ST# = 0
0
66.6
33.3
16
00
1
80
16
8
0
1
0
60
33.3
16
01
1
30
8
4
1
0
33.3
8
4
10
1
40
8
4
11
0
50
8
16
11
1
25
8
4
SSOP/P-DIP PACKAGE
PIN DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
OSCin
OSCout
B1in
VSS
B1out1
B1out2
VDD
B1out3
B2out4
S1
S0
AVSS
LF1
AVDD
REF14
B2in
VSS
MCLK2
MCLK1
B2out4
B2out3
B2out2
B2out1
VSS
ST#
S2
VDD
DOZE#
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