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參數(shù)資料
| 型號： | PST3348 |
| 廠商： | MITSUMI ELECTRIC CO LTD |
| 元件分類： | 電源管理 |
| 英文描述： | CMOS System Reset |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封裝： | SC-82AB, 4 PIN |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 177K |
| 代理商： | PST3348 |
MITSUMI
CMOS System Reset PST3XXX
Description of Operation
(1) V
DD
> VS, V
OUT
: H (M1: ON, M2, M3: OFF)
When V
DD
is gradually lowered from the above state, detection voltage is as follows.
Detection voltage: (R1 + R2 + R3) / (R2 + R3) VREF
(2) V
DD
< VS, V
OUT
: L (M1: OFF, M2, M3: ON)
When V
DD
is gradually raised from the above state, release voltage is as follows.
Release voltage = (R1 + R2) / (R2) VREF
(3) Hysteresis voltage = (release voltage) - (detection voltage).
(4) When V
DD
drops and goes below the minimum operating voltage, output is undefined; when output is
pulled up, output becomes V
DD
.
(5) VREF and detection resistors
1) The reference voltage source (VREF) for this IC is 0.8V typ. This gives excellent low power consumption
and temperature characteristics.
2) The high resistance process is used for resistors R1, R2 and R3 to achieve low consumption current for
the IC.
(6) Through current flows momentarily for detection and release. When using high V
DD
pin impedance, the
through current may cause oscillation.
(Example) Detection voltage changed by external settings
*
The IC input voltage fluctuates due to the
through current R11 voltage drop, and
an oscillation state where detection and
release are repeated may occur.
*
With CMOS output types, do not use as
shown in the diagram at left.
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| PST3349 | CMOS System Reset |
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| PST3351 | CMOS System Reset |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PST3349 | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:IC for CMOS System Reset |
| PST3350 | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:IC for CMOS System Reset |
| PST3351 | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:IC for CMOS System Reset |
| PST3352 | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:IC for CMOS System Reset |
| PST3353 | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:IC for CMOS System Reset |
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