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參數(shù)資料
| 型號： | MIC1232N |
| 廠商： | MICREL INC |
| 元件分類： | 電源管理 |
| 英文描述： | レP Supervisory Circuit |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 162K |
| 代理商： | MIC1232N |
4
Pin 1:
PBRST
- Pushbutton reset input. This input is debounced and can be driven with external logic signals or by
means of a mechanical pushbutton to actively force a reset. All pulses less than 1ms in duration on the
PBRST pin are ignored, whereas, any pulse with a duration of 20ms or greater is guaranteed to cause a
reset.
Pin 2:
TD
- Time delay input. This input selects the timebase used by the watchdog timer. When TD = 0V, the
watchdog timeout period is set to a nominal value of 150ms, when TD = open, the watchdog timeout period is
set to a nominal value of 600ms and when TD = VCC, the watchdog timeout period is 1.2sec nominally.
Pin 3:
TOL
- Tolerance select input. Selects whether 5% or 10% of VCCis used as the reset threshold voltage.
When TOL = 0V, the 5% tolerance level is selected and when TOL = VCC, a 10% tolerance level is selected.
Pin 4:
GND
- IC ground pin, 0V reference.
Pin 5:
RST
- RST is asserted high if either VCCgoes below the reset threshold, the watchdog times out or PBRST is
pulled low for a minimum of 20ms. RST remains asserted for one reset timeout period after VCCexceeds the
reset threshold or after the watchdog times out or after PBRST goes high.
Pin 6:
RST
- RST is asserted low if either VCCgoes below the reset threshold, the watchdog times out or PBRST is
pulled low for a minimum of 20ms. RST remains asserted for one reset timeout period after VCCexceeds the
reset threshold or after the watchdog times out or after PBRST goes high. Open-drain output.
Pin 7:
ST
- Input to the watchdog timer. If ST does not see a transition from high to low within the watchdog timeout
period, RST and RST will be asserted.
Pin 8:
VCC
- Primary supply input, +5V.
Pin Functions
MIC1232
μ
P Supervisory Circuit
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