PCF2123BS/1,512

Description：IC RTC CLK/CALENDAR SPI 16HVQFN
Series：-

SKU:238dde20d494 Category: Real Time Clocks Brand: NXP USA Inc.

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Product introduction

PCF2123BS/1,512 is listed in the Real Time Clock range at ChipApex. The manufacturer field lists NXP USA Inc.. Its product description is IC RTC CLK/CALENDAR SPI 16HVQFN. Review the specifications below when checking this part for your BOM.

Real Time Clock specifications for PCF2123BS/1,512

Description：IC RTC CLK/CALENDAR SPI 16HVQFN
Series：-
Package：Tube
Mfr：NXP USA Inc.
Type：Clock/Calendar
Features：Alarm, Leap Year, Square Wave Output, Watchdog Timer
Memory Size：-
Time Format：HH:MM:SS (12/24 hr)
Date Format：YY-MM-DD-dd
Interface：SPI
Voltage - Supply：1.6V ~ 5.5V
Voltage - Supply, Battery：-
Current - Timekeeping (Max)：0.33µA ~ 0.38µA @ 2V ~ 5V
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Grade：-
Qualification：-
Package / Case：16-VFQFN Exposed Pad
Supplier Device Package：16-HVQFN (3x3)

Real Time Clock datasheet and documents for PCF2123BS/1,512

PCF2123BS/1,512

Real Time Clock Overview

The PCF2123BS/1,512 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power applications. It features an SPI-bus interface with a maximum data rate of 6.25 Mbit/s. The device provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal. Key features include a watchdog function, programmable timer and alarm with interrupt capability, and a programmable offset register for frequency adjustment. It operates at clock voltages from 1.1 V to 5.5 V and includes integrated oscillator load capacitors.

Real Time Clock Feature Summary

SPI Interface: Serial Peripheral Interface with up to 6.25 Mbit/s data rate.
Low Power: Typical backup current of 100 nA at VDD = 2.0 V and Tamb = 25 °C.
Calendar & Clock: Tracks time from seconds to years; supports leap year calculation.
Alarm & Timer: Programmable alarm and countdown timer with interrupt output.

Real Time Clock Applications

Time keeping applications
Battery powered devices
Metering equipment
High duration timers
Daily alarms

Real Time Clock Procurement Notes

Verify the ordering suffix ',512' corresponds to the tape and reel delivery form as specified in the official NXP documentation. Confirm package type HVQFN16 matches design requirements. Check RoHS compliance status via manufacturer resources.

Real Time Clock Selection Notes

Select this component when an SPI interface is preferred over I2C. Ensure supply voltage range (1.1 V to 5.5 V) aligns with system rails. Consider the HVQFN16 package dimensions (3 x 3 x 0.85 mm) for PCB layout constraints.

Real Time Clock Part Context

The PCF2123 series includes variants like PCF2123TS (TSSOP14) and PCF2123U (bare die). The BS variant specifically denotes the HVQFN16 package. All share the same core RTC functionality and register map.