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Technical Note / White Paper

Discontinued Product
RTC-7301DG (4-bit Real Time Clock Module)

  • Built-in crystal unit 32.768 kHz with frequency adjusted
  • High speed parallel interface compatible with SRAM
  • Built-in alarm and timer interrupt functions
  • Frequency selectable clock output
    (32.768kHz to 1/30Hz)
  • Built-in 30second adjustment function, digital pace adjustment function
    (Max. adjustment: ±192 × 10-6)
  • Operating voltage range:2.4 V to 5.5 V,
    time keeping voltage range: 1.6V to 5.5V
  • Low current consumption (0.6µA / 3V Typ.)

Complies with EU RoHS directive.

RTC-7301DG
RTC-7301DG

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Brief Sheet pdf

Application Manual
(ETM15E-05) pdf (678kB)

Block diagram

Block diagram

  • This is a block diagram for RTC-7301SF.
  • Be aware that RTC-7301DG differs according to the following 2points.
  • *1) The VTEMP output is not connected to an external pin.
  • *2) The FCON input pin is not connected to an external pin,
    but is fixed at "H" internally.

Terminal connection / External dimensions

Terminal connection External dimensions

(Unit: mm)

Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.

Specifications *Refer to application manual for details.

Absolute Max. rating

*GND=0 V

Item Symbol Condition Min. Max. Unit
Supply voltage VDD VDD to GND -0.3 +7.0 V
Input voltage VIN Input terminal,
D0 to D3 pins		 GND-0.3 VDD+0.3
Output voltage(1) VOUT1 /IRQ pin +8.0
Output voltage(2) VOUT2 FOUT,D0-D3,VTEMP pin VDD+0.3
Storage temperature TSTG Stored as bare product. -55 +125 °C

Operating range

*GND=0 V

Item Symbol Condition Min. Max. Unit
Power voltage VDD - 2.4 5.5 V
Clock voltage VCLK - 1.6
Operating temperature TOPR No condensation -40 +85 °C

Frequency characteristics

Item Symbol Condition Range Unit
Frequency precision Δf/f Ta=+25°C,VDD=3.0 V B:5±23 (*1) ×10-6
Oscillation Start up time tSTA Ta=+25°C,VDD=2.4V 3.0Max. s
Frequency temperature characteristics TOP Ta=-10°C to +70°C
VDD=3.0V ,+25°C		 +10 / -120 ×10-6
Frequency voltage characteristics f/V Ta=+25°C,
VDD=1.6V to 5.5V		 ±2.0Max. ×10-6/V
Aging fa Ta=+25°C,
VDD=3.0V First year		 ±5.0Max. ×10-6/year

(*1) Please ask tighter tolerance

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