PCF85263ATLSLASHA datasheet(9/102 Pages) NXP

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NXP Semiconductors

PCF85263A

Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus

Input or input/output pins must always be at a defined level (VSS or VDD) unless otherwise specified.

Description

Symbol

PCF85263AT

(SO8)

PCF85263

ATL

(DFN2626-10)

PCF85263

ATT

(TSSOP8)

PCF85263

ATT1

(TSSOP10)

PCF85263AUK

(WLCSP12)

Type

Primary use

Secondary use

SCL

Input

Serial clock input

CLK

Output CLK (push-pull)

Can be configured with INTAPM[1:0] [4]

INTA (CLK)

Output

Interrupt output

(open-drain)

CLK output

(open-drain)

VDD

A1, C2

Supply Supply voltage

Table 3. Pin description...continued

[1]

Connect to VDD if not used.

[2]

See Table 6 and Table 46.

[3]

The die paddle (exposed pad) is connected to VSS through high ohmic (non-conductive) silicon attach and must be electrically isolated. It is good

engineering practice to solder the exposed pad to an electrically isolated PCB copper pad as shown in Figure 46 for better heat transfer but it is not

required as the RTC doesn’t consume much power. In no case should traces be run under the package-exposed pad.

[4]

See Table 6 and Table 48.

PCF85263A

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 5.4 — 12 December 2025

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