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Timer IC

Pericom offers both fixed and adjustable universal timer ICs for home appliance applications having an AC power source and needing to directly drive either an external relay or silicon-controlled rectifier (SCR). These timer ICs are ideal for low cost, high volume applications such as home appliances, healthcare products, and industrial control systems, among others.

Universal timer ICs play an important role in creating more power efficient systems in appliances like irons, electric kettles, heaters, toasters, and coffee machines.  Timers built into these products can automatically shut them off after a set usage period to prevent them from continuing to draw power when they are not in use.  Timers can also improve safety by enabling robust power safety controls that can turn off systems to prevent injury to users or damage to equipment.

Pericom’s universal timers are standard ASIC products with integrated application-specific functionality to minimize cost, reduce design complexity, and speed time-to-market.  Products range from simple timers to multi-functional devices with a wide selection of advanced capabilities, depending upon the family: 

  • Direct drive of relays and SCR to reduce component count and cost while increasing reliability; 
  • Support for 50/60Hz AC power input to enable universal designs;
  • Wide choice of fixed or adjustable timing options to meet the specific needs of your application;
  • Quick Test Mode (QTM) to shorten test time during production to cut manufacturing cost while improving reliability;
  • Power On Reset capabilities to simplify device operation for increased reliability;
  • One button operation to simplify device operation by minimizing user confusion and error;
  • Built-in RC oscillator to increase system integration;
  • Efficient packaging to shrink system form factor;

Pericom also provides a variety of application-specific reference circuits to accelerate design of your home appliance, healthcare product, or industrial control system.  These proven solutions meet the Energy-related Products (ErP) European directive by operating at less than 0.5 W power consumption when in standby mode.  Designs are available that support both 110 V and 220 V AC power source input.  Pericom has been a leader in the home appliance industry for more than a decade and has experienced design teams available to assist you with design, production, and certification issues.

Download Reference Design

Timer IC FAQs

How do I know if a device has been obsoleted? I am unable of find the datasheet on the Pericom website.

If the datasheet is not found on Pericom's website, it is a strong indication that the part has been obsoleted. there are several ways to find out.  The first method would be to check on the Product Detail page for your particular product choice, if there are related PDN notices, they will show up on the tab, marked "PDNS".

Alternatively go Discontinuation Notices to search for the part number.

Is there a replacement for an obsolete part?

Not all obsolete parts will have a direct replacement. However, we recommended that you contact your regional sales office.

What are the types of jitter?

There are several types of jitter, but the main ones are: cycle-to-cycle jitter, period jitter, half period jitter, and peak-to-peak jitter. Jitter terminology can be found in AB36: Jitter Measurement Techniques at Application Brief No. 36 or Application Note No. 27.

What is the lead finish for Pericom products? What about lead-free?

All Pericom's products that are not lead-free are composed of 85% Sn and 15% Pb. For lead-free products, they are composed of 100% matte Sn. Lead-free products are marked and ordered with the letter "E" suffix at the end of the part number.

Where can I find Mean Time Before Failure (MTBF) or Failures In Time (FIT) values for Pericom products?

FIT and MTBF data can be found at Pericom's Quality webpage.

Where can I find the information on your Pb-free and "Green" packaging?

Lead (Pb)-Free and Green information can be found on individual datasheets or Pb-Free & Green Page.