參數(shù)資料
型號: ICS8745BM-21LF
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 1/19頁
文件大?。?/td> 0K
描述: IC CLK GEN ZD DIFF-LVDS 20-SOIC
標準包裝: 37
系列: HiPerClockS™
類型: 時鐘發(fā)生器
PLL: 帶旁路
輸入: HCSL,LVDS,LVHSTL,LVPECL,SSTL
輸出: LVDS
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 是/是
頻率 - 最大: 700MHz
除法器/乘法器: 是/是
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 20-SOIC
包裝: 管件
其它名稱: 800-1218
800-1218-5
800-1218-ND
8745BM-21LF
DATA SHEET
ICS8745BM-21 REVISION D JANUARY 25, 2010
1
2010 Integrated Device Technology, Inc.
1:1 Differential-to-LVDS Zero Delay
Clock Generator
ICS8745B-21
General Description
The ICS8745B-21 is a highly versatile 1:1 LVDS Clock
Generator. The ICS8745B-21 has a fully integrated
PLL and can be configured as zero delay buffer,
multiplier or divider, and has an output frequency
range of 31.25MHz to 700MHz. The Reference
Divider, Feedback Divider and Output Divider are each
programmable, thereby allowing for the following output-to-input
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8. The external
feedback allows the device to achieve “zero delay” between the input
clock and the output clock. The PLL_SEL pin can be used to bypass
the PLL for system test and debug purposes. In bypass mode, the
reference clock is routed around the PLL and into the internal output
dividers.
Features
One differential LVDS output designed to meet
or exceed the requirements of ANSI TIA/EIA-644
One differential feedback output pair
Differential CLK, nCLK input pair
CLKx, nCLKx pair can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
Output frequency range: 31.25MHz to 700MHz
Input frequency range: 31.25MHz to 700MHz
VCO range: 250MHz to 700MHz
External feedback for “zero delay” clock regeneration
with configurable frequencies
Programmable dividers allow for the following output-to-input
frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
Cycle-to-cycle jitter: 30ps (maximum)
Output skew: 35ps (maximum)
Static phase offset: 25ps ± 125ps
Full 3.3V supply voltage
0°C to 70°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
HiPerClockS
ICS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
QFB
nQFB
VDDO
SEL2
FB_IN
nFB_IN
MR
nCLK
CLK
GND
SEL1
SEL0
VDD
PLL_SEL
VDDA
SEL3
GND
Q
nQ
VDDO
ICS8745B-21
20-Lead SOIC
7.5mm x 12.8mm x 2.3mm package body
M Package
Top View
Block Diagram
PLL_SEL
CLK
nCLK
FB_IN
nFB_IN
SEL0
SEL1
SEL2
SEL3
MR
Q
nQ
QFB
nQFB
PLL
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1:8
0
1
÷1, ÷2, ÷4, ÷8,
÷16, ÷32, ÷64
Pullup
Pulldown
Pullup
Pulldown
Pullup
Pulldown
Pin Assignment
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