PCA8565 datasheet(17/26 Pages) PHILIPS

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Philips Semiconductors

PCA8565

Real time clock/calender

Product data

Rev. 01 — 31 March 2003

17 of 26

9397 750 10695

12. Dynamic characteristics

[1]

Unspeciﬁed for fCLKOUT = 32.768 kHz.

[2]

All timing values are valid within the operating supply voltage at ambient temperature and referenced to VIL and VIH with an input voltage

swing of VSS to VDD.

[3]

A detailed description of the I2C-bus speciﬁcation, with applications, is given in brochure

The I2C-bus and how to use it. This brochure

may be ordered using the code 9398 393 40011.

[4]

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 29:

Dynamic characteristics

VDD = 1.8 to 5.5 V; VSS =0V; Tamb = −40 to + 125 °C; fosc = 32.768 kHz; quartz Rs =40kΩ; CL = 8 pF; unless otherwise

speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Oscillator

CINT

integrated load

capacitance

∆fosc/fosc

oscillator stability

∆V

DD = 200 mV; Tamb =25 °C-

× 10-7

Quartz crystal parameters (f = 32.768 kHz)

series resistance

Ω

parallel load capacitance

trimmer capacitance

CLKOUT output

δCLKOUT

CLKOUT duty cycle

[1] -50

Timing characteristics: I2C-bus[2][3]

fSCL

SCL clock frequency

[4] -

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

0.6

µs

tSW

tolerable spike width on

bus

--50

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