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PCF85263ATL/A Datasheet(PDF) 74 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) 74 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-010607
0
1
2
3
4
5
6
-0.4
-0.2
0
0.2
0.4
VDD (V)
Δfosc/fosc
Δfosc/fosc
(ppm)
(ppm)
(1)
(1)
(2)
(2)
(3)
(3)
Tamb = 25 °C
1. CL(itg) = 12.5 pF
2. CL(itg) = 6 pF
3. CL(itg) = 7 pF
Figure 42. Oscillator frequency variation with respect to VDD
VDD = 1.8 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; unless otherwise
specified. All timing values are valid within the operating supply voltage and temperature range and referenced to VIL and
VIH with an input voltage swing of VSS to VDD.[1]
Symbol
Parameter
Conditions
Min
Max
Unit
Cb
Capacitive load for
each bus line
-
400
pF
fSCL
SCL clock frequency
[2] 0
400
kHz
tHD;STA
Hold time (repeated)
START condition
0.6
-
μs
tSU;STA
Set-up time for a
repeated START
condition
0.6
-
μs
tLOW
LOW period of the
SCL clock
1.3
-
μs
tHIGH
HIGH period of the
SCL clock
0.6
-
μs
tr
rRse time of both SDA
and SCL signals
20
300
ns
tf
Fall time of both SDA
and SCL signals
[3] [4] 20 × (VDD / 5.5 V) 300
ns
tBUF
Bus free time between
a STOP and START
condition
1.3
-
μs
tSU;DAT
Data set-up time
100
-
ns
Table 68. I2C-bus characteristics
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
Document feedback
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