mk1493-03b Integrated Device Technology, mk1493-03b Datasheet - Page 2

• Manufacturer Part Number: mk1493-03b
• Description: Pci Clock Generator
• Manufacturer: Integrated Device Technology

Pin Assignment
Pin Descriptions
IDT™ PCI CLOCK GENERATOR
MK1493-03B
PCI CLOCK GENERATOR
Number
X1 / ICLK
CPUCLK
CPUCLK
CLK50M
Pin
REF25
FS3_A
FS2_A
FS1_A
FS0_A
FS7_B
FS6_B
FS5_B
FS4_B
10
11
12
1
2
3
4
5
6
7
8
9
GND
GND
GND
GND
VDD
VDD
VDD
VDD
SDA
SCL
X2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
X1/ICLK
FS3_A
FS2_A
FS1_A
FS0_A
Name
GND
GND
VDD
SDA
VDD
SCL
Pin
X2
48-pin TSSOP
Power
Power
Power
Power
Type
Input
Input
Input
Input
Input
Input
Input
Pin
XO
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Freq select input pin for PCI CLK3 per table 1
Freq select input pin for PCI CLK2 per table 1
Freq select input pin for PCI CLK1 per table 1
Freq select input pin for PCI CLK0 per table 1
Connect to ground.
Connect to +3.3 V.
Clock pin for SMBus circuitry, 5 V tolerant.
Data pin for SMBus circuitry, 5 V tolerant.
Connect to ground.
Crystal connection/input clock. Connect to a 25 MHz fundamental mode crystal or clock input.
Connect to a 25 MHz fundamental mode crystal or leave open for clock input.
Connect to +3.3 V.
FS4_A
FS5_A
FS6_A
FS7_A
FS0_B
FS1_B
PCICLK7
GND
VDD
PCICLK6
PCICLK5
PCICLK4
FS2_B
VDD
GND
CLK66/71/83
CLK66M/FS8
FS3_B
VDD
GND
PCICLK2/FS10
PCICLK1/FS9
PCICLK0
PCICLK3
2
Table 1. Frequency Select
1)
Table 2. Input Select
2)
3) Default Value upon Power up.
(pin 27)
The changes in frequency are step changes.
Each PCI clock is individually selectable.
FS8 (pin 32)
FS9
FS(0:7)_B
0
0
1
1
0
0
1
1
0
1
(pin 28)
Pin Description
FS10
0
1
0
1
.
.
.
.
Internal pull-up resistor 120K.
Internal pull-up resistor 120K.
Internal pull-up resistor 120K.
Internal pull-up resistor 120K.
FS(0:7)_A
CLK66M/71M/83M
0
1
0
1
CPUCLK/CPUCLK
83.33 MHz
71.42 MHz
66.66 MHz
(FS8, FS9,FS10&FS11)
(pin 33)
OFF
100MHz
125MHz
MK1493-03B
PCICLK(0:7)*
CLOCK SYNTHESIZER
3
33.3333 MHz
66.6666 MHz
3
25 MHz
50 MHz
2
2
1 2
REV H 051310