RTC-7301SF (4-bit Real Time Clock Module)



Complies with EU RoHS directive.
  • Built-in crystal unit 32.768 kHz with frequency adjusted
  • High speed parallel interface compatible with SRAM
  • Built-in alarm and timer interrupt functions
  • Built-in semiconductor temperature sensor
    (Voltage output: -7.8 mV / °C, RTC-7301SF)
  • 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.)

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,
    Fcon 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

DC characteristics

*(GND=0V,VDD=1.6V to 5.5V,Ta=-40°C to +85°C)

Item Symbol Condition Min. Typ. Max. Unit
Current consumption
(When non-accessed)
FOUT =Output OFF
VDD=5V - 1.0 2.0 µA
IDD2 VDD=3V - 0.6 1.0

Note)There is no VTEMP pin on the RTC-7301DG so standards for the VTEMP pin within the conditions described above do not apply.

Temperature sensor characteristics

*GND=0 V,Ta=-40°C to +85°C

Item Symbol Condition Min. Typ. Max. Unit
Temperature output voltage VTEMP Ta=+25°C,GND based output voltage
VTEMP pins,VDD=2.7V to 5.5V
1.470 V
Output precision TACR Ta=+25°C,
VDD=2.7V to 5.5V
±5.0 °C
Temperature sensitivity VSE -40°C≤Ta≤+85°C,
VDD=2.7V to 5.5V
-7.3 -7.8 -8.3 mV/ °C
Linearity ΔNL -40°C≤Ta≤+85°C,
VDD=2.7V to 5.5V
±2.0 %
Temperature detection range TSOP ΔNL≤ ±2.0%,VDD=2.7V to 5.5V -40 +85 °C
Output resistance R0 Ta=25°C,
VTEMP pins,
VDD=2.7V to 5.5V
GND standard and VDD standard
1.0 3.0
Load condition CL VDD=2.7V to 5.5V 100 pF
RL VDD=2.7V to 5.5V 500
Response time tRSP VDD=3.3V
CL=50pF, RL=500kΩ, Max. ±1°C
200 µs

Note)There is no temperature sensor function on the RTC-7301DG.

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