RTC-8564NB (Low Current Consumption I2C-Bus Interface Real Time Clock Module)

RTC-8564NBRTC-8564NB

Complies with EU RoHS directive.

  • Built in frequency adjusted 32.768kHz crystal unit.
  • Interface Type
    I2C-Bus Interface (400kHz)
  • Operating voltage range
    1.8V to 5.5V
  • Timekeeper voltage range
    1.0V to 5.5V / -20°C to +70°C
  • Low backup current
    275nA / 3.0V(Typ.)
  • 32.768kHz frequency output function
    C-MOS output With Control Pin
  • The various functions include full calendar, alarm, timer,
  • and power supply voltage monitoring function
  • *The I2C-Bus is a trademark of NXP Semiconductors

Block diagram

Block diagram

Overview

  • Interface Type
    • I2C-Bus Interface.(Hi-speed bus specifications 400kHz)
    • * I2C-Bus slave address : read A3h and write A2h
  • Low Timekeeper voltage range
    • 1.0V to 5.5V / Ta=-20° to +70°C
    • 1.1V to 5.5V / Ta=-40° to +85°C
  • 32.768kHz frequency output function
    • CLKOUT pin output (C-MOS output ), CL=30pF
    • CLKOE pin enables output on/off control.
    • Output selectable
    • < 32.768kHz, 1024Hz, 32Hz, 1Hz >
  • The various interrupt function
    • Timer function can be set up between 1/4096second and 255minutes.
    • Alarm function can be set to any combination of day of week, hour, or minute.

Specifications *Refer to application manual for details.

Recommend Operating Conditions

Item Symbol Condition Min. Typ. Max. Unit
Power voltage VDD - 1.8 3.0 5.5 V
Clock voltage VCLK - VLOW 3.0 5.5 V
Operating temperature TOPR - -40 +25 +85 °C

Low voltage detection

Item Symbol Condition Typ. Max. Unit
Low voltage detection VLOW Ta=-20°C to +70°C 0.9 1.0V V
Ta=-40°C to +85°C 0.9 1.1V V

Frequency characteristics

Item Symbol Condition Rating Unit
Frequency tolerance Δ f/f Ta=+25°C
VDD=3.0V
5±23 * ×10-6

* Please ask for tighter tolerance. (Equivalent to 1 minute of monthly deviation)

Current consumption characteristics

Ta=-40°C to +85°C

Item Symbol Conditions Min. Typ. Max. Unit
Current Consumption lBK fSCL=0Hz
CLKOE=GND

CLKOUT;output OFF(LOW)
VDD=5V 330 800 nA
VDD=3V 275 700
l32k fSCL=0Hz
CLKOE=VDD

CLKOUT;32.768kHz output ON
(Output=OPEN ; CL=0pF)
VDD=5V 2.5 3.4 µA
VDD=3V 1.5 2.2
name

Pin function

Signal Name Input/Output Function
SCL Input Serial clock input pin.
SDA Bi-directional Data input and output pin.
CLKOUT Output 32.768kHz clock output pin with the output control function. (C-MOS)
CLKOE pin control the condition of CLKOUT with FE-bit, etc.
CLKOE pin
input
FE
bit
CLKOUT pin
output
HIGH 1 Output (C-MOS)
0 OFF (LOW)
LOW 1 OFF (LOW)
0 OFF (LOW)
CLKOE Input
/INT Output Interrupt output (N-ch open drain)
VDD - Connected to a positive power supply.
GND - Connected to a ground.

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)

footprint

(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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