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PCF85263ATL/AX 데이터시트(PDF) 44 Page - NXP Semiconductors

부품명 PCF85263ATL/AX
상세설명  Tiny Real-Time Clock/calendar with alarm function, battery switch-over, time stamp input, and I2C-bus
PDF  92 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF85263ATL/AX 데이터시트(HTML) 44 Page - NXP Semiconductors

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NXP Semiconductors
PCF85263A
Tiny Real-Time Clock/calendar with alarm function, battery switch-over, time stamp input, and I2C-bus
aaa-010426
internal power supply
cleared via interface
BSF
Vth = 1.5 V
VDD (= 0 V)
VBAT = 1.2 V
VDD
INTA
battery mode indication
interface active
interface inactive
interface active
I2C
Figure 27. Switching at the higher of VBAT or Vth
7.11.3.4 Switching at the lower of VBAT and Vth level, BSM[1:0] = 11
With this mode switching takes place when VDD falls below the lower of Vth or VBAT.
In Figure 28, an example is given where the threshold is set to 1.5 V and a single cell
battery is connected to VBAT. In this example, switching to the battery voltage takes
place when VDD falls below VBAT.
aaa-010429
internal power supply
cleared via interface
BSF
Vth = 1.5 V
VDD (= 0 V)
VBAT = 1.2 V
VDD
INTA
battery mode indication
interface active
interface inactive
interface active
I2C
Figure 28. Switching at the lower of VBAT or Vth
PCF85263A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 5 — 1 February 2021
44 / 92



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