PCF8563TSSLASH5 datasheet(34/50 Pages) NXP

34 / 50 page

PCF8563

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

Product data sheet

Rev. 10 — 3 April 2012

34 of 50

NXP Semiconductors

PCF8563

Real-time clock/calendar

13. Dynamic characteristics

[1]

CL is a calculation of Ctrim and COSCO in series:

[2]

Unspecified for fCLKOUT = 32.768 kHz.

[3]

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.

[4]

A detailed description of the I2C-bus specification is given in Ref. 11 “UM10204”.

[5]

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 V to 5.5 V; VSS =0V; Tamb = 40 C to +85 C; fosc = 32.768 kHz; quartz Rs =40 k; CL = 8 pF; unless otherwise

specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Oscillator

COSCO

capacitance on pin OSCO

f

osc/fosc

relative oscillator frequency variation

V

DD =200 mV;

Tamb =25 C

-0.2

-ppm

Quartz crystal parameters (f = 32.768 kHz)

series resistance

100



load capacitance

parallel

[1] 7

12.5

Ctrim

trimmer capacitance

external;

on pin OSCI

CLKOUT output



CLKOUT

duty cycle on pin CLKOUT

[2] -50

I2C-bus timing characteristics (see Figure 28)[3][4]

fSCL

SCL clock frequency

[5] -

400

kHz

tHD;STA

hold time (repeated) START condition

0.6

s

tSU;STA

set-up time for a repeated START condition

0.6

s

tLOW

LOW period of the SCL clock

1.3

s

tHIGH

HIGH period of the SCL clock

0.6

s

rise time of both SDA and SCL signals

standard-mode

s

fast-mode

0.3

s

fall time of both SDA and SCL signals

0.3

s

tBUF

bus free time between a STOP and START

condition

1.3

s

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

s

tw(spike)

spike pulse width

on bus

trim

OSCO





trim

OSCO



-----------------------------------------

PCF8563TS/5 数据表(PDF) 34 Page - NXP Semiconductors

PCF8563TS/5 数据表(HTML) 34 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 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

数据表下载