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參數(shù)資料
| 型號： | MB3793-37PF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 電源管理 |
| 英文描述： | Power Voltage Monitoring IC with Watchdog Timer |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | PLASTIC, SOP-8 |
| 文件頁數(shù)： | 4/21頁 |
| 文件大小： | 150K |
| 代理商： | MB3793-37PF |
4
MB3793
-37A
I
BLOCK DESCRIPTION
1.
Comp. S
Comp. S is a comparator with hysteresis to compare the reference voltage with a voltage (V
S
) that is the result of
dividing the power voltage (V
CC
) by resistors 1 and 2. When V
S
falls below 1.24 V, a reset signal is output.
This function enables the MB3793 to detect ans abnomality within 1
μ
s when the power is cut or falls abruptly.
2.
Output circuit
The output circuit contains a RESET output control comparator that compares the voltage at the CTP pin to the
threshold voltage to release the RESET output if the CTP pin voltage exceeds the threshold value.
Since the reset (RESET) output buffer has CMOS organization, no pull-up resistor is needed.
3.
Pulse generator
The pulse generator generates pulses when the voltage at the CK1 and CK2 clock pins changes to High from Low
level (positive-edge trigger) and exceeds the threshold voltage; it sends the clock signal to the watchdog timer.
4.
Watchdog timer
The watchdog timer can monitor two clock pulses. Short-circuit the CK1 and CK2 clock pins to monitor a single
clock pulse.
5.
Inhibition pin
The inhibition (INH) pin forces the watchdog timer on/off. When this pin is High level, the watchdog timer is stopped.
6.
Logic circuit
The logic circuit contains flip-flops.
Flip-flop RSFF1 controls the charging and discharging of the power-on reset time setting capacitor (C
TP
).
Flip-flop RSFF2 turns on/off the circuit that accelerates charging of the power-on reset time setting capacitor
(C
TP
) at a reset. The RSFF2 operates only at a reset; it does not operate at a power-on reset when the power is
turned on.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB3793-37PNF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Power Voltage Monitoring IC with Watchdog Timer |
| MB3793-42 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER |
| MB3793-42DPNF-G-JN-ERE1 | 功能描述:Supervisor Open Drain or Open Collector 1 Channel 8-SOP 制造商:cypress semiconductor corp 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:簡單復位/加電復位 受監(jiān)控電壓數(shù):1 輸出:開路漏極或開路集電極 復位:低有效 復位超時:最小為 80 ms 電壓 - 閾值:4.2V 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商器件封裝:8-SOP 標準包裝:1 |
| MB3793-42PF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:POWER-VOLTAGE MONITORING IC WITH WATCHDOG TIMER |
| MB3793-42PF-6E1# | 制造商:FUJITSU 功能描述: |
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