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PCF85063ATT/AJ

Ultra-low-power I2C RTC, 110nA backup, alarm/timer, 8-XSON 2x1.5mm

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Manufacturer Part：

PCF85063ATT/AJ

Package：

8-XSON (2.0 x 1.5 x 0.55 mm)

Brand：
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Description

Product Overview

The PCF85063ATT/AJ from NXP is an ultra-low-power I2C real-time clock (RTC) and calendar in an 8-XSON package. Drawing only 110nA typical backup current, it provides seconds to century calendar with alarm, timer, and timestamp functions.

Key Specifications

Function Real-time clock / calendar
Interface I2C (400kHz)
Backup Current 110nA typical @ 3.0V
Supply Voltage 0.9V ~ 5.5V (VBAT)
Supply Voltage (Main) 1.8V ~ 5.5V
Accuracy +/-3ppm (at 25C, crystal-dependent)
Package 8-XSON (2.0 x 1.5mm)
Operating Temperature -40°C to +85°C (AJ grade)

Features

  • Ultra-low 110nA backup current on VBAT
  • Seconds to century calendar with alarm function
  • Programmable countdown timer
  • Event timestamp (VDD fail detection)
  • Backup battery switchover function
  • 8-XSON 2.0 x 1.5mm ultra-compact package

Applications

  • Portable and battery-powered RTC
  • Smart meters and data loggers
  • Industrial controllers and PLCs
  • Medical devices and wearables
  • Automotive telematics

The PCF85063ATT/AJ from NXP is an ultra-low-power I2C real-time clock and calendar in an 8-XSON (2.0×1.5mm) package. It draws only 110nA typical backup current on VBAT, extending coin-cell battery life to over 10 years. The device provides seconds through century calendar with leap year compensation. Features include a programmable alarm, countdown timer, and event timestamp that records the time when VDD drops below a threshold. The automatic battery switchover seamlessly transitions between VDD and VBAT supplies. The AJ grade supports -40C to +85C operation.

The PCF85063ATT/AJ integrates a 32.768kHz crystal oscillator with a divider chain that generates 1Hz timekeeping pulses. These pulses increment the seconds register, which cascades to minutes, hours, days, weekdays, months, and years with automatic leap year correction. Time data is accessed via I2C at addresses 0x51. The alarm function compares alarm registers with current time and asserts the interrupt pin on match. The countdown timer decrements from a programmed value and generates an interrupt on underflow. The timestamp function captures the current time when VDD falls below a threshold, allowing reconstruction of power-failure timing. Battery switchover automatically connects VBAT when VDD drops below the threshold.

Pin Name Type Function
1 OSCI Analog Crystal oscillator input
2 OSCO Analog Crystal oscillator output
3 INT Output Interrupt output (alarm/timer)
4 VSS Power Ground
5 SDA I/O I2C serial data
6 SCL Input I2C serial clock
7 VBAT Power Backup battery supply (0.9-5.5V)
8 VDD Power Main supply voltage (1.8-5.5V)
  • Portable and battery-powered timekeeping (coin cell backup)
  • Smart meter power-failure timestamp logging
  • Industrial PLC and controller real-time scheduling
  • Medical wearable device time and date
  • Automotive telematics and event logging
Manufacturer Part Number Package Notes
NXP PCF85063ATL/AJ 8-TSSOP Same function, TSSOP package
Microchip MCP7940N-I/SN 8-SOIC RTC with SRAM, I2C
TI DRV8305N 8-SOIC RTC alternative
EPSON RX8900CE SOP-8 RTC with DTCXO, 5ppm
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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