參數(shù)資料
型號(hào): ICS87004AGLFT
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 1/15頁(yè)
文件大?。?/td> 0K
描述: IC CLOCK GEN ZD 1:4 24-TSSOP
標(biāo)準(zhǔn)包裝: 2,500
系列: HiPerClockS™
類型: 時(shí)鐘發(fā)生器,扇出配送,多路復(fù)用器,零延遲緩沖器
PLL: 帶旁路
輸入: HCSL,LVDS,LVHSTL,LVPECL,SSTL
輸出: LVCMOS,LVTTL
電路數(shù): 1
比率 - 輸入:輸出: 2:4
差分 - 輸入:輸出: 是/無(wú)
頻率 - 最大: 250MHz
除法器/乘法器: 是/是
電源電壓: 2.375 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 帶卷 (TR)
其它名稱: 87004AGLFT
DATA SHEET
ICS87004AG REVISION C DECEMBER 1, 2009
1
2009 Integrated Device Technology, Inc.
1:4, Differential-to-LVCMOS/LVTTL
Zero Delay Clock Generator
ICS87004
General Description
The ICS87004 is a highly versatile 1:4 Differential-
to-LVCMOS/LVTTL Clock Generator and a member of
the HiPerClockS family of High Performance Clock
Solutions from IDT. The ICS87004 has two selectable
clock inputs. The CLK0, nCLK0 and CLK1, nCLK1
pairs can accept most standard differential input levels. Internal bias
on the nCLK0 and nCLK1 inputs allows the CLK0 and CLK1 inputs
to accept LVCMOS/LVTTL. The ICS87004 has a fully integrated PLL
and can be configured as zero delay buffer, multiplier or divider and
has an input and output frequency range of 15.625MHz to 250MHz.
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 clocks. 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
Four LVCMOS/LVTTL outputs, 7 typical output impedance
Selectable CLK0/nCLK0 or CLK1/nCLK1 clock inputs
CLKx/nCLKx pairs can accept the following differential
input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL
Internal bias on nCLK0 and nCLK1 to support LVCMOS/LVTTL
levels on CLK0 and CLK1 inputs
Output frequency range: 15.625MHz to 250MHz
Input frequency range: 15.625MHz to 250MHz
VCO range: 250MHz to 500MHz
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
Fully integrated PLL
Cycle-to-cycle jitter: 45ps (maximum)
Output skew: 50ps (maximum)
Static phase offset: 50ps ± 125ps (3.3V ± 5%), CLK0/nCLK0
Full 3.3V or 2.5V output operating supply
5V tolerant inputs
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
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
Q0
VDDO
SEL0
SEL1
SEL2
SEL3
CLK_SEL
VDD
CLK0
nCLK0
GND
Q1
VDDO
GND
Q2
VDDO
Q3
MR
FB_IN
PLL_SEL
CLK1
nCLK1
VDDA
ICS87004
24-Lead TSSOP
7.8mm x 4.4mm x 0.925mm package body
G Package
Top View
Block Diagram
0
1
Q0
Q1
Q2
Q3
PLL_SEL
FB_IN
SEL0
SEL1
SEL2
SEL3
MR
CLK0
nCLK0
PLL
8:1, 4:1, 2:1, 1:1,
1:2, 1:4, 1:8
÷2, ÷4, ÷8, ÷16
÷32, ÷64, ÷128
Pullup/Pulldown
Pulldown
CLK_SEL Pulldown
Pulldown
CLK1
nCLK1 Pullup/Pulldown
Pulldown
Pullup
Pulldown
0
1
Pin Assignment
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