PCF2123U/10AA/1 查看數據表（PDF） - NXP Semiconductors.

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PCF2123U/10AA/1

SPI Real time clock/calendar

NXP Semiconductors. 

NXP Semiconductors

PCF2123

SPI Real time clock/calendar

250

IDD(1)

(nA)

210

001aai558

170

130

90

50

0

20

40

60

80

100

Rs(2) (kΩ)

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

(1) IDD (nA) minimum power mode.

(2) Maximum value for RS is 100 k.

Fig 5. IDD with respect to quartz RS

8.1.2 Power consumptions with respect to timer mode

Four source clocks are possible for the timer. The 4.096 kHz source clock will add the

greatest part to the power consumption. The selection of 64 Hz, 1 Hz, or 1⁄60 Hz will be

almost indistinguishable and add very little.

400

IDD(1)

(nA)

300

200

100

001aai559

(2)

(3)

PCF2123

Product data sheet

0

0

2

4

Configuration: CLKOUT disabled, quartz RS = 15 k.

(1) IDD (nA) minimum power mode.

(2) Timer clock = 4 kHz.

(3) Timer clock = 64 Hz, 1 Hz, 1⁄60 Hz.

Fig 6. IDD with respect to timer clock selection

All information provided in this document is subject to legal disclaimers.

Rev. 6 — 15 July 2013

6

VDD (V)

© NXP B.V. 2013. All rights reserved.

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