Automotive ICs

Introduction – Automotive Convenience Timers

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Automotive convenience timer top

ABLIC's convenience timer is a CMOS timer IC with ultra-low power consumption, which is suitable for relative time management and enables setting the alarm time or the interval time arbitrarily.
It contributes to reducing system standby current during engine shutdown.

Contents

  1. Ultra-low current consumption 0.2μA
  2. Flexible time management
  3. Built-in quartz crystal (S-35710M)
  4. Application example
  5. View all products

1. Ultra-low current consumption 0.2μA

Circuit connection example using convenience timerThe ultra-low current consumption of 0.2μA is much lower than the current consumption of the built-in microcontroller timer. It is possible to significantly reduce the system standby current to use the convenience timer instead of the microcontroller timer and to operate the system intermittently.

Example of intermittent operation using convenience timer
Example of intermittent operation using convenience timer

 

2. Flexible time management

  • Alarm interrupt time  can be set over a wide time period from 1 second up to 194 days
  • Alarm interrupt time settings can be made in 1-second increments
  • To enable building highly flexible systems, our product lineup includes the S-35710 that, via an interface, programs software time settings and the S-35720 that provides time setting pins for hardware time selection.

Time setting range of convenience timer
Time setting range of convenience timer
(* To make a time setting exceeding 194 days, use the Read time register command to read elapsed time and add it to the microcontroller.)
Convenience timer, software time settings (S-35710) and hardware time settings (S-35720)
Software time settings (S-35710) and hardware time settings (S-35720)

 

3. Built-in quartz crystal (S-35710M)

Thanks to the built-in quartz crystal: 

  • There is no need to assess IC and quartz crystal matching.
  • The number of external components can be reduced.
  • Housed in an HSOP-8Q package of the same size as an 8-pin SOP package, the IC is compact and has fewer pins.

水晶振動子を内蔵した2in1パッケージ HSOP-8Q（W5.02 x L6.0 x H1.68 (max) ㎜）
2-in-1 package (a timer IC and Quartz Crystal built into a single package)
HSOP-8Q（W5.02 x L6.0 x H1.68 (max) mm)

4. Application example

  • Time management for regular surveillance of fuel vaporization status (e.g., fuel injection system)
  • Time management for regular surveillance of battery status (e.g., BMS)
  • Time management during various system sleep periods (engine shutdown)
  • Alarm management for equipment replacement and end of service life