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參數(shù)資料
| 型號： | AL2007LA |
| 英文描述： | Synchronous Push-Pull PWM Controllers; Package: SSOP; No of Pins: 16; Temperature Range: -40°C to +125°C |
| 中文描述： | AL2007LA為20MHz?170MHz的FSPLL AL2007LA |數(shù)據(jù)資料 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 156K |
| 代理商： | AL2007LA |
SEC ASIC
20MHZ~170MHZ FSPLL
ANALOG
8 / 16
AL2005H
- The digital power(VDD,VSS) and the analog power(VDA,VSSA) must be dedicated to PLL seperately.
If the dedicated VDD and VSS is not allowed, the pins of the smallest power consuming block are
shared with the PLL.
- The POAR50_BB pad is used as a FILTER pad that contains ESD production diodes and 50
§ù
resistor
without buffers.
- The FOUT and FILTER pins must be placed away from the internal signals in order to avoid overlapping
signal lines.
- The blocks having a large digital switching current must be located away from the PLL core.
- The PLL core must be shielded by guardring.
- For the FOUT pad, you can use a custom drive buffer or POT4_BB buffer considering the drive current.
CORE LAYOUT GUIDE
Oscillator Cell USERS GUIDE (PLL Typical Input 14.318MHz)
- There is crystal driver cell
Input Oscillator Cell with Enable.(Refer to Figure 2)
If a wide range of crystal component is used instead of a 14.318MHz, it is recommended to use STD85's
10MHz-40MHz programmable PSOSCM2 with a positive enable pin like Figure2. A crystal component is
located between the PADA pin and the PADY pin.
options for the AL2005H PLL core. PSOSCM2 is 10MHz-40MHz programmable
- When implementing an embedded PLL block, the following pins must are provided for testing the PLL
locking function:
* Normal Case : FIN,FILTER,FOUT,VDDA,VSSA,VDD and VSS.
* Used Crystal Pad Cells(Used PSOSCM2) : PADA,PADY,FILTER,FOUT,VDDA,VSSA,VDD and VSS
- A special XTAL pad(PSOSCM2) for PLL
- The XTAL must be located between PADA and PADY Enable pin(E) must be HIGH in normal operation.
- The Operating Frequency of PSOSCM2 is 10MHz ~ 40MHz.
- PI pin
must be connected
to VDD and PO pin floated.
is supported, Order chapter 4 for details.(STD85 Data Book)
Figure 2.
XTAL PAD Symbol (PSOSCM2)
E
PADA
PADY
YN
PI
PO
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