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RNA51951A, B Preliminary R03DS0003EJ0301 Rev.3.01 Page 6 of 9 Apr 19, 2011 Ambient Temperature Ta (°C) –40 0 –20 20 40 80 60 100 VCC = 5 V Circuit Current vs. Ambient Temperature (RNA51951B) 700 0 300 200 100 500 400 600 Example of Application Circuit Reset Circuit of RNA51951 RL VCC RNA51951x RESET Logic circuit GND GND Power- supply Power- supply Output Figure 1 Reset Circuit of RNA51951 Notes: 1. When the voltage is anything except 4.25 V, RNA51955, RNA51957, and RNA51958 are used. In this case, the detecting supply voltage is 1.25 (R 1 +R2)/R2 (V) approximately. The detecting supply voltage can be set between 2 V and 15 V. 2. When the delay time is short, RNA51951 and RNA51955 are available. These ICs have a delay capacity and the delay time is about 200 s. If a longer delay time is necessary, RNA51953, RNA51957, and RNA51958 are used. 3. If the RNA5195xx and the logic circuit share a common power source, type A (built-in load type) can be used whether a pull-up resistor is included in the logic circuit or not. 4. The logic circuit preferably should not have a pull-down resistor, but if one is present, add load resistor RL to overcome the pull-down resistor. 5. When the reset terminal in the logic circuit is of the low reset type, RNA51951, RNA51953, RNA51955, and RNA51957 are used and when the terminal is of the high reset type, RNA51958 are used. 6. When a negative supply voltage is used, the supply voltage side of RNA5195xx and the GND side are connected to negative supply voltage respectively. |
