The Maxim/Dallas pin-compatible alternative to the RN5VD is the MAX6424/MAX6425 Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay.
Benefits of the MAX6424/MAX6425 microprocessor over the RN5VD:
Benefits of the RN5VD microprocessor over the MAX6424/MAX6425: