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BD46275 Datasheet(PDF) 11 Page - Rohm |
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BD46275 Datasheet(HTML) 11 Page - Rohm |
11 / 16 page Datasheet Datasheet 11/13 BD45xxx series BD46xxx series TSZ02201-0R7R0G300010-1-2 © 2013 ROHM Co., Ltd. All rights reserved. 15.Nov.2013 Rev.007 www.rohm.com TSZ22111・15・001 ●Circuit Applications 1) Examples of common power supply detection reset circuits. Application examples of BD45xxx series (Open Drain output type) and BD46xxx series (CMOS output type) are shown below. CASE1: Power supply of the microcontroller (VDD2) differs from the power supply of the reset detection (VDD1). Use an open drain output type (BD45xxx) with a load resistance RL as shown Fig.18. CASE2: Power supply of the microcontroller (VDD1) is same as the power supply of the reset detection (VDD1). Use a CMOS output type (BD46xxx) device or an open drain output type (BD45xxx) device with a pull up resistor between the output and VDD1. When a capacitance CL for noise filtering is connected to the VOUT pin (the reset signal input terminal of the microcontroller), please take into account the waveform of the rise and fall of the output voltage (VOUT). 2) The following is an example of a circuit application in which an OR connection between two types of detection voltage resets the microcontroller. Fig. 20 To reset the microcontroller when many independent power supplies are used in the system, OR connect an open drain output type (BD45xxx series) to the microcontroller’s input with pull-up resistor to the supply voltage of the microcontroller (VDD3) as shown in Fig. 20. By pulling-up to VDD3, output “High” voltage of micro-controller power supply is possible. Fig.18 Open Drain Output Type Fig.19 CMOS Output Type VDD1 VDD2 GND BD45xxx CL (Noise-filtering Capacitor) RL RST Micro controller CL (Noise-filtering Capacitor) VDD1 GND BD46xxx RST Micro controller VDD2 VDD1 VDD3 GND RST Micro controller RL BD45xxx BD45xxx |
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