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Manufacturer Part #


PCA8565 Series 5.5 V Serial (2-Wire, I2C) Real Time Clock/Calendar - TSSOP-8

Mfr. Name: NXP
Standard Pkg:
Product Variant Information section
Date Code: 1911
Product Specification Section
Technical Attributes
Attributes Table
Date Format: DW:DM:M:Y/Binary
Time Format: HH:MM:SS/Binary
Interface: I2C
Supply Voltage-Nom: 1.8V to 5.5V
Temperature Grade: Extended
Operating Temp Range: -40°C to +125°C
Storage Temperature Range: -65°C to +150°C
Package Style:  TSSOP-8
Mounting Method: Surface Mount
Features & Applications

The PCA8565 is a CMOS1 real time clock and calendar optimized for low power
consumption. A programmable clock output, interrupt output and voltage-low detector are
also provided. All address and data are transferred serially via a two-line bidirectional
I2C-bus. Maximum bus speed is 400 kbit/s. The built-in word address register is
incremented automatically after each written or read data byte.
AEC-Q100 compliant (PCA8565TS) for automotive applications


  • Provides year, month, day, weekday, hours, minutes and seconds based on a
    32.768 kHz quartz crystal
  • Century flag
  • Clock operating voltage: 1.8 V to 5.5 V
  • Extended operating temperature range: -40 °C to +125 °C
  • Low backup current; typical 0.65 mA at VDD = 3.0 V and Tamb = 25 °C
  • 400 kHz two-wire I2C-bus interface (at VDD = 1.8 V to 5.5 V)
  • Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz and
    1 Hz)
  • Alarm and timer functions
  • Internal power-on reset
  • I2C-bus slave address: read A3h and write A2h
  • Open-drain interrupt pin
  • One integrated oscillator capacitor


  • Automotive
  • industrial
  • Other applications that require a wide operating temperature range
Pricing Section
Minimum Order:
Multiple Of:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
7 Weeks
Web Price
Product Variant Information section