PCF8563P datasheet(19/30 Pages) PHILIPS

19 / 30 page

Philips Semiconductors

PCF8563

Real-time clock/calendar

Product speciﬁcation

16 April 1999

19 of 30

9397 750 04855

11. Dynamic characteristics

[1]

Unspeciﬁed for fCLKOUT = 32.768 kHz.

[2]

All timing values are valid within the operating supply voltage range at Tamb and referenced to VIL and VIH with an input voltage swing of

VSS to VDD.

[3]

I2C-bus access time between two STARTs or between a START and a STOP condition to this device must be less than one second.

Table 30: Dynamic characteristics

VDD = 1.8 to 5.5 V; VSS =0V; Tamb = −40 to +85 °C; fOSC = 32.768 kHz; quartz Rs =40kΩ; CL = 8 pF; unless otherwise

speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Oscillator

CL(integrated) integrated load capacitance

∆fOSC/fOSC oscillator stability

∆V

DD = 200 mV; Tamb =25 °C

−

× 10−7

−

Quartz crystal parameters (fOSC = 32.768 kHz)

series resistance

−−

Ω

parallel load capacitance

−

trimmer capacitance

−

CLKOUT output

δCLKOUT

CLKOUT duty factor

[1]

−

I2C-bus timing characteristics [2]

fSCL

SCL clock frequency

[3]

−−

400

kHz

tHD;STA

START condition hold time

0.6

−−µs

tSU;STA

set-up time for a repeated

START condition

0.6

−−µs

tLOW

SCL LOW time

1.3

−−µs

tHIGH

SCL HIGH time

0.6

−−µs

SCL and SDA rise time

−−

0.3

µs

SCL and SDA fall time

−−

0.3

µs

capacitive bus line load

−−

400

tSU;DAT

data set-up time

100

−−

tHD;DAT

data hold time

−−

tSU;STO

set-up time for STOP condition

4.0

−−µs

tSW

tolerable spike width on bus

−−

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