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參數(shù)資料
| 型號： | SY89464UMY |
| 廠商： | MICREL INC |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 89464 SERIES, LOW SKEW CLOCK DRIVER, 10 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC44 |
| 封裝： | 7 X 7 MM, LEAD FREE, MO-220, MLF-44 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 689K |
| 代理商： | SY89464UMY |
Micrel, Inc.
SY89464U
December 2007
M9999-120607-B
hbwhelp@micrel.com or (408) 955-1690
13
Power-On Reset (POR) Description
The SY89464U includes an internal power-on reset
(POR) function to ensure the RPE logic starts-up in a
known logic state once the power-supply voltage is
stable. An external capacitor connected between VCC
and the CAP pin (pin 12) controls the delay for the
power-on reset function.
The required capacitor value calculation is based upon
the time the system power supply needs to power up
to a minimum of 2.3V. The time constant for the
internal power-on-reset must be greater than the time
required for the power supply to ramp up to a minimum
of 2.3V.
The following formula describes this relationship:
C(
F) ≥
t
dPS(m s)
12(ms/
F)
As an example, if the time required for the system
power supply to power up past 2.3V is 12ms, then the
required capacitor value on pin 12 would be:
C(
F) ≥
12ms
12(ms/
F)
C(F)
≥ 1F
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| SY89467UHY | 89467 SERIES, LOW SKEW CLOCK DRIVER, 20 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP64 |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SY89464UMY TR | 功能描述:編碼器、解碼器、復用器和解復用器 2:1 RPE MUX w/ 1:10 LVPECL Fanout (I Temp, Green) RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| SY89464UMYTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision LVPECL 1:10 Fanout with 2:1 Runt |
| SY89465U | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision LVDS 1:10 Fanout with 2:1 Runt Pulse Eliminator MUX and Internal Termination |
| SY89465U_10 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision LVDS 1:10 Fanout with 2:1 Runt Pulse Eliminator MUX and Internal Termination |
| SY89465UMG | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision LVDS 1:10 Fanout with 2:1 Runt Pulse Eliminator MUX and Internal Termination |
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