RTC with 4-bit parallel interface
Discontinued Products are limited to existing inventory.
The SM8580A is a real-time clock IC based on a 32.768kHz crystal oscillator, which features a 4-bit parallel interface for communication with an external microcontroller. It comprises second-counter to year-counter clock and calendar circuits that feature automatic leap-year adjustment up to year 2099, alarm and timer interrupt functions, clock counter change detect functions, ±30-second correction function, time error correction function, and built-in temperature sensor. The 4-bit parallel interface is compatible with general-purpose SRAM over a high-speed bus.
Key Features
  • High-speed bus 4-bit parallel interface
  • Built-in temperature sensor (analog voltage output)
  • -195 to +192ppm time error correction range
  • 2 alarm and timer interrupt outputs-(software override when desired)
  • Date, day, hour, minute, and second-counter pre-settable alarm interrupt
  • 1/4096 seconds to 255 minutes pre-settable interval timer interrupt function
  • 2.4 to 5.5V interface voltage range
  • 1.6 to 5.5V clock voltage range
  • 0.6µA/3V (typ) current consumption
  • Package:SSOP-24-100054-1
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