PCF85263ATLSLASHA datasheet(70/102 Pages) NXP

70 / 102 page

NXP Semiconductors

PCF85263A

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

14 Characteristics

VDD = 0.9 V to 5.5 V; VSS = 0 V; Tamb = -40 °C to +85 °C; fosc = 32.768 kHz; quartz Rs = 60 kΩ; CL = 7 pF; all registers in

reset state; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supplies

Interface inactive; fSCL = 0 Hz

[1] 0.9

5.5

VDD

Supply voltage

Interface active; fSCL = 400 kHz

[2] 1.8

5.5

VBAT

Battery supply voltage

[1] 0.9

5.5

CLKOUT disabled; VDD = 3.3 V;

interface inactive; fSCL = 0 Hz

[3]

Battery switch enabled

Tamb = 25 °C

320

480

Tamb = 50 °C

370

550

Tamb = 85 °C

590

885

Battery switch disabled

[4]

Tamb = 25 °C

280

420

Tamb = 50 °C

330

500

Tamb = 85 °C

550

825

IDD

Supply current

CLKOUT disabled; VDD = 3.3 V;

interface active; fSCL = 400 kHz

μA

VDD ≥ VBAT

IL(BAT)

Battery leakage

current

VDD < VBAT

100

Reference voltage

HIGH falling VDD

2.4

2.6

2.8

HIGH rising VDD

2.5

2.7

2.95

LOW falling VDD

1.3

1.4

1.5

LOW rising VDD

1.37

1.47

1.6

Vth

Threshold voltage

Reference voltage hysteresis

±50

Inputs [5]

Input voltage

-0.5

+5.5

VIL

LOW-level input

voltage

-0.5

+0.3VDD

VIH

HIGH-level input

voltage

0.7VDD

5.5

VI = VSS or VDD

μA

ILI

Input leakage current

Post ESD event

-0.5

+0.5

μA

Input capacitance

[6] -

RPU(TS)

Pullup resistance on

pin TS

80 kΩ mode

[7] 68

kΩ

Table 67. Characteristics

PCF85263A

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Product data sheet

Rev. 5.4 — 12 December 2025

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