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參數資料
| 型號： | MK1493-14GLF |
| 元件分類： | 時鐘產生/分配 |
| 英文描述： | 100 MHz, OTHER CLOCK GENERATOR, PDSO28 |
| 封裝： | 0.173 INCH, ROHS COMPLIANT, MO-153, TSSOP-28 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 167K |
| 代理商： | MK1493-14GLF |
MK1493-14
MDS 1493-14 A
1
Revision 082205
Integrat ed Circuit Systems ● 525 Race Stre et, San Jo se, CA 9 5126 ● te l (40 8 ) 2 97-12 01 ● www.ics t.co m
SPREAD SPECTRUM CLOCK GENERATOR
Description
The MK1493-14 is a spread spectrum clock designed
for embedded applications. The device takes a
reference clock or crystal input of 27 MHz and provides
four differential HCSL outputs at 100 MHz for Serial
ATA and PCI-Express. The current mode differential
outputs comply directly with HCSL (0.7 V) norms. In
addition, a 27 MHz video reference clock, two 25 MHz
Ethernet clocks and one 48 MHz USB clock are
generated at single-ended CMOS levels.
The MK1493-14 includes an SMBus interface to control
the spread and drive strength of the 100 MHz HCSL
outputs. The reference current, IREF, is set by a 475
ohm resistor on the RSET pin, and the drive strength of
each 100 MHz output can be programmed as 4X, 5X,
6X or 7X IREF.
Features
Single-ended clock or crystal input of 27 MHz
Four pairs of 100 MHz outputs, (HCSL, 0.7 V current
mode differential pair) with selectable spread
Two 25 MHz Ethternet clock outputs (LVCMOS)
One 48 MHz USB clock output (LVCMOS)
One 27 MHz video reference output (LVCMOS)
±125 ps peak-to-peak max jitter on 100 MHz clocks
±200 ps peak-to-peak max jitter on 27 MHz
reference and 25 MHz clocks
Packaged in 28-pin TSSOP Pb (lead) free package
Operating voltage of 3.3 V
Low power consumption
Block Diagram
VDD
RSET
470ohms
1%
GND
100 MHz
Spread PLL
25 MHz
PLL
Clock Buffer /
Crystal
Oscillator
27M
X1/ ICLK
X2
External caps required
with crystal for accurate
tuning of the clock
F27M
F25MA
F25MB
SMB_ CLK
SMB_ DATA
48 MHz
PLL
F48M
M/25M
OE100
F100MA_DP
F100MA_DN
F100MB_DP
F100MB_DN
F100MC_DP
F100MC_DN
F100MD_DP
F100MD_DN
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