PCF2129AT datasheet(52/68 Pages) NXP

52 / 68 page

PCF2129A_1

Product data sheet

Rev. 01 — 13 January 2010

52 of 68

NXP Semiconductors

PCF2129A

Integrated RTC, TCXO and quartz crystal

12. Static characteristics

Table 52.

Static characteristics

VDD = 1.8 V to 4.2 V; VSS =0V; Tamb = −40 °C to +85 °C, unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supplies

VDD

supply voltage

[1] 1.8

4.2

VBAT

battery supply voltage

1.8

4.2

VDD(cal)

calibration supply voltage

3.3

Vlow

low voltage

1.2

IDD

supply current

interface active

SPI-bus

fSCL = 6.5 MHz

800

μA

fSCL = 1.0 MHz

200

μA

I2C-bus

fSCL = 1.0 MHz

200

μA

interface inactive (fSCL =0Hz)

CLKOUT disabled (COF[2:0] = 111), one power supply VDD

(PWRMNG[2:0] = 111), timestamp detection disabled (TSOFF = 1)[2]

VDD =2.0 V

500

VDD = 3.3 V

700

1500

VDD =4.2 V

800

CLKOUT enabled at 32 kHz (default), one power supply VDD

(PWRMNG[2:0] = 111), timestamp detection disabled (TSOFF = 1)

VDD =2.0 V

600

VDD =3.3 V

850

VDD =4.2 V

1050

CLKOUT disabled (COF[2:0] = 111), power management functions enabled

(default), timestamp detection enabled (default)

VDD =2.0 V

1800

VDD =3.3 V

2150

VDD = 4.2 V

2350

3500

CLKOUT enabled at 32 kHz (default); power management functions enabled

(default), timestamp detection enabled (default)

VDD =2.0 V

1900

VDD =3.3 V

2300

VDD =4.2 V

2600

IBAT

battery supply current

VDD active;

VBAT = 3.0 V

100

Power management

Vth(sw)bat

battery switch threshold

voltage

-2.5

-V

Vth(bat)low

low battery threshold voltage

2.5

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