NXP Semiconductors
10. Internal circuitry
PCF2123
SPI Real time clock/calendar
PCF2123
VDD
OSCI
OSCO
TEST
INT
CE
VSS
CLKOE
CLKOUT
SCL
SDI
SDO
001aai552
Fig 28. Device diode protection diagram of PCF2123
11. Safety notes
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Observe precautions for handling
electrostatic sensitive devices.
Such precautions are described in the ANSI/ESD S20.20, IEC/ST 61340-5, JESD625-A or
equivalent standards.
CAUTION
Semiconductors are light sensitive. Exposure to light sources can cause the IC to
malfunction. The IC must be protected against light. The protection must be applied to all
sides of the IC.
PCF2123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 15 July 2013
© NXP B.V. 2013. All rights reserved.
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