PCA85073A: Automotive tiny Real-Time Clock/Calendar with alarm function and I²C-bus

Overview

The PCA85073A is a CMOS¹ Real-Time Clock (RTC) and calendar optimized for low power consumption. An offset register allows fine-tuning of the clock. All addresses and data are transferred serially via the two-line bidirectional I²C-bus. Maximum data rate is 400 kbit/s. The register address is incremented automatically after each written or read data byte.

Features

AEC-Q100 grade 2 compliant for automotive applications
Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
Low current; typical 0.25 µA at V_DD = 3.0 V and T_amb = 25 °C
Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz, 8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz, and 1 Hz)
Alarm function
Minute and half minute interrupt
Internal Power-On Reset (POR)
High temperature operation range: —40 °C to +105 °C
Clock operating voltage: 0.9 V to 5.5 V
400 kHz two-line I²C-bus interface (at V_DD = 1.8 V to 5.5 V)
Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
Countdown timer
Oscillator stop detection function
Programmable offset register for frequency adjustment
Latch-up performance exceeds 100 mA per JESD 78, Class II
ESD protection exceeds JESD 22
- 4000 V Human-Body Model (A114-A)
- 1000 V Charged-Device Model (C101)
Package offered: TSSOP8

Features

AEC-Q100 grade 2 compliant for automotive applications
Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
Low current; typical 0.25 µA at V_DD = 3.0 V and T_amb = 25 °C
Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz, 8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz, and 1 Hz)
Alarm function
Minute and half minute interrupt
Internal Power-On Reset (POR)
High temperature operation range: —40 °C to +105 °C
Clock operating voltage: 0.9 V to 5.5 V
400 kHz two-line I²C-bus interface (at V_DD = 1.8 V to 5.5 V)
Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
Countdown timer
Oscillator stop detection function
Programmable offset register for frequency adjustment
Latch-up performance exceeds 100 mA per JESD 78, Class II
ESD protection exceeds JESD 22
- 4000 V Human-Body Model (A114-A)
- 1000 V Charged-Device Model (C101)
Package offered: TSSOP8

OM13515:I²C-bus RTC demoboard

Evaluation and Development Boards

Target Applications

Industrial

Accurate timing
Air condition
Body control and battery management
Center stack
Dashboard
Infotainment unit
Telematics
Tracking time of the day

PCA85073A: Automotive Tiny Real-Time Clock/Calendar with Alarm Function and I²C-bus

Overview

Features

Features

PCA85073A Block diagram

TSSOP8

NXP’s Real-Time Clocks

PCA85073A Block diagram

TSSOP8

NXP’s Real-Time Clocks

Development Boards and Designs

Development Boards and Designs

Target Applications

Industrial

PCA85073A: Automotive Tiny Real-Time Clock/Calendar with Alarm Function and I2C-bus

Overview

Features

Features

PCA85073A Block diagram

TSSOP8

NXP’s Real-Time Clocks

PCA85073A Block diagram

TSSOP8

NXP’s Real-Time Clocks

Development Boards and Designs

Development Boards and Designs

Target Applications

Industrial

PCA85073A: Automotive Tiny Real-Time Clock/Calendar with Alarm Function and I²C-bus