Automotive ICs

125°C Operation 2-wire Interval Timer Convenience Timer S-35740 Series

The convenience timer is a CMOS timer IC which operates with low current consumption, and is suitable for the time management of the relative time.
The S-35740 Series outputs the fixed-cycle interrupt signal. The frequency and duty ratio of the fixed-cycle interrupt signal can be set freely by users via a 2-wire serial interface.
Moreover, the S-35740 Series has a built-in 24-bit timer. For example, users can obtain the cumulative energization time of the system since the timer performs a count-up action every second.

Caution: This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in the purpose, contact to SII is indispensable.


Fixed-cycle interrupt signal output function
Settable frequency and duty ratio, with an output control pin
Low current consumption
(Crystal oscillator: Cl = 6 pF, Vdd = 3.0 V, ENBL pin = “L”, Ta = +25°C)
Wide range of operation voltage
1.8 V to 5.5 V
2-wire (I2C-bus) CPU interface
Built-in 32.768 kHz crystal oscillation circuit
Operation temperature range
Ta = -40°C to +125°C
Lead-free (Sn 100%), halogen-free
AEC-Q100 qualified*1

*1. Contact our sales office for details.


  • Safety critical components typified by engine, transmission, suspension and ABS, and EV/HEV/PHEV related equipment, etc.
  • Meter, body, headlamp, ITS, etc.
  • Accessory, car navigation, car audio system, etc.