- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45375 > MPC972FAR2 (INTEGRATED DEVICE TECHNOLOGY INC) 125 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP52 PDF資料下載
參數(shù)資料
| 型號： | MPC972FAR2 |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 125 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP52 |
| 封裝： | LQFP-52 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大小： | 171K |
| 代理商： | MPC972FAR2 |
MPC972
TIMING SOLUTIONS
BR1333 — Rev 6
7
MOTOROLA
MPC972 is designed to specifically address this need. The
MPC972 monitors the relationship between the Qa and the
Qc banks of outputs. It provides a low going pulse, one period
in duration, one period prior to the coincident rising edges of
the Qa and Qc outputs. The duration and the placement of
the pulse is dependent on the higher of the Qa and Qc output
frequencies. The timing diagrams in the data sheet show the
various waveforms for the SYNC output. Note that the SYNC
output is defined for all possible combinations of the Qa and
Qc outputs even though under some relationships the lower
frequency clock could be used as a synchronizing signal.
Table 1. Programmable Output Frequency Relationships (VCO_Sel=‘1’)
fsela1
fsela0
Qa
fselb1
fselb0
Qb
fselc1
fselc0
Qc
0
1
0
1
0
1
VCO/4
VCO/6
VCO/8
VCO/12
0
1
0
1
0
1
VCO/4
VCO/6
VCO/8
VCO/10
0
1
0
1
0
1
VCO/2
VCO/4
VCO/6
VCO/8
Table 2. Programmable Output Frequency Relationships (VCO_Sel=‘1’)
fselFB2
fselFB1
fselFB0
QFB
0
1
0
1
0
1
VCO/4
VCO/6
VCO/8
VCO/10
1
0
1
0
1
0
1
VCO/8
VCO/12
VCO/16
VCO/20
Figure 4. Typical Skews Relative to QFB
–400
–300
–200
–100
0
100
200
300
400
Qc3
Qc2
Qc1
Qc0
Qb3
Qb2
Qb1
Qb0
Qa3
Qa2
Qa1
Qa0
ps
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
30
40
50
60
70
80
90
100
110
I/O
Jitter
(ps)
Figure 5. Typical Phase Jitter versus Reference Frequency
I/O Jitter
Reference Clock Frequency (MHz)
VCO/4
VCO/6
VCO/8
1σ
相關PDF資料 |
PDF描述 |
|---|---|
| MPC972FA | 125 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP52 |
| MPC9773AER2 | 9773 SERIES, PLL BASED CLOCK DRIVER, 13 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP52 |
| MPC980FA | 66 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP52 |
| MPC9817EN | 66 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO20 |
| MPC9817SD | 66 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MPC972H10 F44A WAF | 制造商:Motorola Inc 功能描述: |
| MPC973 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LOW VOLTAGE PLL CLOCK DRIVER |
| MPC974 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LOW VOLTAGE PLL CLOCK DRIVER |
| MPC974A44 F44A WAF | 制造商:Motorola Inc 功能描述: |
| MPC9772 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:3.3V 1:12 LVCMOS PLL Clock Generator |
發(fā)布緊急采購，3分鐘左右您將得到回復。