PCF2123TS datasheet(7/54 Pages) NXP

7 / 54 page

PCF2123_1

Product data sheet

Rev. 01 — 19 November 2008

7 of 54

NXP Semiconductors

PCF2123

SPI Real time clock/calendar

9.1.1 Power consumption with respect to quartz series resistance

The series resistance acts as a loss element. Low Rs will reduce current consumption

further.

Conﬁguration: CLKOUT disabled, VDD = 3 V, timer clock set to 1⁄60 Hz.

(1) IDD (nA) minimum power mode.

Fig 6.

IDD with respect to quartz RS

Rs(2) (k

Ω)

0

100

80

40

60

20

001aai558

130

170

90

210

250

IDD(1)

(nA)

50

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