RNA51955AFPH0 datasheet(7/12 Pages) RENESAS

7 / 12 page

RNA51955A, B

Preliminary

R03DS0004EJ0300 Rev.3.00

Page 7 of 11

Jun 19, 2012

Example of Application Circuit

Reset Circuit of RNA51955

VCC

RNA51955x

RESET

Logic circuit

Input

GND

Power-

supply

Power-

supply

Output

Figure 1 Reset Circuit of RNA51955

Notes: 1. The detecting supply voltage is VS  (R1 +R2)/R2 (V) approximately. VS = 1.25 V (Typ)

The detecting supply voltage can be set between 2 V and 15 V.

2. Delay time must be longer than 200

s, RNA51953, RNA51957, and RNA51958 are used. In this case, the

delay time is about 0.34

 Cd (pF) s.

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 a negative supply voltage is used, the supply voltage side of RNA5195xx and the GND side are

connected to negative supply voltage respectively.

RNA51955AFPH0 Datasheet(PDF) 7 Page - Renesas Technology Corp