PCF8563 datasheet(5/65 Pages) NXP

5 / 65 page

PCF85063A

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Product data sheet

Rev. 7 — 30 March 2018

5 of 65

NXP Semiconductors

PCF85063A

Tiny Real-Time Clock/calendar with alarm function and I2C-bus

7.2 Pin description

[1]

The die paddle (exposed pad) is connected to VSS through high ohmic (non-conductive) silicon attach and should be electrically

isolated. It is good engineering practice to solder the exposed pad to an electrically isolated PCB copper pad as shown in Figure 37

“Footprint information for reflow soldering of SOT1197-1 (DFN2626-10) of PCF85063ATL” 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.

[2]

NXP recommends tying VDD of the device and VDD of all the external pull-up resistors to the same Power Supply.

Table 4.

Pin description

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

Symbol

Type

Description

PCF85063AT

PCF85063ATL

PCF85063ATT

OSCI

input

oscillator input

OSCO

output

oscillator output

CLKOE[2]

input

CLKOUT enable or disable pin; enable is

active HIGH

INT[2]

output

interrupt output (open-drain)

VSS

5[1]

supply

ground supply voltage

SDA[2]

input/output

serial data line

SCL[2]

input

serial clock input

n.c.

not connected

CLKOUT

output

clock output (push-pull)

VDD

supply

supply voltage

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