PCF8563 datasheet(20/32 Pages) NXP

20 / 32 page

PCF8563_6

Product data sheet

Rev. 06 — 21 February 2008

20 of 32

NXP Semiconductors

PCF8563

Real-time clock/calendar

11. 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 speciﬁcation. 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 28.

Dynamic characteristics

VDD = 1.8 V to 5.5 V; VSS =0V; Tamb = −40 °C 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(itg)

integrated load capacitance

∆fosc/fosc

relative oscillator frequency variation

∆V

DD = 200 mV;

Tamb =25 °C

-2

× 10−7 -

Quartz crystal parameters (f = 32.768 kHz)

series resistance

Ω

load capacitance

parallel

Ctrim

trimmer capacitance

CLKOUT output

δCLKOUT

duty cycle on pin CLKOUT

[1] -50

I2C-bus timing characteristics (see Figure 21)

[2][3]

fSCL

SCL clock frequency

[4] -

400

kHz

tHD;STA

hold time (repeated) START condition

0.6

µs

tSU;STA

set-up time for a repeated START condition

0.6

µs

tLOW

LOW period of the SCL clock

1.3

µs

tHIGH

HIGH period of the SCL clock

0.6

µs

rise time of both SDA and SCL signals

SDA

0.3

µs

SCL

0.3

µs

fall time of both SDA and SCL signals

SDA

0.3

µs

SCL

0.3

µs

capacitive load for each bus line

400

tSU;DAT

data set-up time

100

tHD;DAT

data hold time

tSU;STO

set-up time for STOP condition

0.6

µs

tw(spike)

spike pulse width

on bus

PCF8563 数据表(PDF) 20 Page - NXP Semiconductors

PCF8563 数据表(HTML) 20 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

数据表下载