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PCF85263ATL/A Datasheet(PDF) 22 Page - NXP Semiconductors

Part # PCF85263ATL/A
Description  Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus
PDF  102 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF85263ATL/A Datasheet(HTML) 22 Page - NXP Semiconductors

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NXP Semiconductors
PCF85263A
Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus
aaa-009582
SECOND ALARM1
SECOND TIME
SEC_A1E
0
1
SEC_A1E = 0
example
=
MINUTE ALARM1
MINUTE TIME
MIN_A1E
=
HOUR ALARM1
HOUR TIME
HR_A1E
set alarm flag A1F (1)
=
DAY ALARM1
DAY TIME
DAY_A1E
=
MONTH ALARM1
MONTH TIME
MON_A1E
=
check now signal
0
1
MIN_A2E = 0
example
MINUTE ALARM2
MINUTE TIME
MIN_A2E
=
HR_A2E
set alarm flag A2F (1)
=
WDAY_A2E
=
check now signal
HOUR ALARM2
HOUR TIME
WEEKDAY ALARM2
WEEKDAY TIME
1. Only when all enabled alarm settings are matching.
The flag is set
only on increment to a matched case (and not every time it is equal).
Figure 13. Alarm1 and alarm2 function block diagram (RTC mode)
7.4.2 Alarms in stop-watch mode
In stop-watch mode, Alarm 1 can be configured from seconds to 999 999 hours. Alarm 2 operates on minutes
up to 9 999 hours.
PCF85263A
All information provided in this document is subject to legal disclaimers.
© 2025 NXP B.V. All rights reserved.
Product data sheet
Rev. 5.4 — 12 December 2025
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