BD87A41FVM-TR Rohm Semiconductor, BD87A41FVM-TR Datasheet
BD87A41FVM-TR
Specifications of BD87A41FVM-TR
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BD87A41FVM-TR Summary of contents
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... BD87A34FVM,BD87A41FVM,BD99A41F ●Description The BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM and BD99A41F are watchdog timer reset ICs. It delivers a high precision detection voltage of 1.5% and a super-low current consumption of 5 µA (Typ.). It can be used in a wide range of electronic devices to monitor power supply voltages and in system operation to prevent runaway operation. ● ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●Absolute maximum ratings (Ta = 25℃) Parameter Power supply voltage CT pin voltage CTW pin voltage RESET pin voltage INH pin voltage CLK pin voltage Power dissipation Operating ambient temperature Storage temperature Maximum junction temperature *1 MSOP8 : Reduced by 4.70 mW/℃ over 25℃, when mounted on a glass epoxy board (70 mm × × 1.6 mm). ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●Electrical characteristics (Unless otherwise specified −40℃ to 105℃, VDD = 5 V) Parameter Symbol [Overall] Total supply current 1 IDD1 (during WDT operation) Total supply current 2 IDD2 (when WDT stopped) Output leak current Ileak Output current capacity [RESET] 1 ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●Reference data (Unless otherwise specified 25℃) : 4.1V Detection SUPPLY VOLTAGE: VDD [V] Fig.1 Detection Voltage 2 1.5 1 0 CTW PIN VOLTAGE: VCTW [V] Fig.4 CTW Charge Discharge Current 10000 1000 Moniter Time 100 10 Reset Time 1 0.1 ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●Block diagram BD37A□□FVM VDD CLK Vref CT 2 VDD Pulse generation + R CTW circuit VthH VthL VDD 4 ●Pin assignments BD37A□□FVM Pin No. Function name 1 CLK Clock input from microcontroller Reset delay time setting capacitor ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●I/O Circuit diagram CT VDD CLK CTW VDD VDD CTW ●Timing chart V DETH VDD V DET 0 INH (BD37A□□FVM／BD99A41F) 0 INH (BD87A□□FVM) 0 CLK 0 VCT V CTH 0 VthH V CTW VthL 0 *1 TWH T PLH R ESET 0 (1) (2) (3) (4) (5) www ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●Explanation 1) The RESET pin voltage (RESET) switches to low when the power supply voltage (VDD) falls to 0 The external capacitor connected to the CT pin begins to charge when VDD rises above the reset detection voltage (VDETH). The RESET signal stays low until VDD reaches the VDETH voltage and switches to high when VDD reaches or exceeds the VDETH voltage ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●External settings for pins and precautions 1) Connect a capacitor (0.001 µF to 1,000 µF) between the VDD and GND pins when the power line impedance is high. Use of the IC when the power line impedance is high may result in oscillation. ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F 8) Ground Wiring Pattern When using both small signal and large current GND patterns recommended to isolate the two ground patterns, placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage ...
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... BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM, BD87A34FVM, BD87A41FVM, BD99A41F ●Ordering part number Part No. Part No. BD 37A19, 37A41, 87A28, 87A29, 87A34, 87A41 99A41 MSOP8 2.9±0.1 (MAX 3.25 include BURR) 4° 1PIN MARK 0.475 S +0.05 −0.04 0.22 0.08 S 0.65 SOP8 5.0±0.2 (MAX 5.35 include BURR) + 6° ...
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