RTC-7301SF (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
  • Built-in semiconductor temperature sensor
    (Voltage output: -7.8 mV / °C)
  • 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.


Block diagram

Block diagram

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

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


Terminal connection / External dimensions

Terminal connection External dimensions

(Unit: mm)

The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.

Footprint (Recommended)


(Unit: mm)

To maintain stable operation, provide a 0.1uF by-pass capacitor
at a location as near as possible to the power source terminal of the crystal product (between Vcc - GND).

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