PCA8802_1

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 01 — 19 February 2009

21 of 34

NXP Semiconductors

PCA8802

Smartcard RTC

[1]

[2]

.

12. Dynamic characteristics

[1]

[2]

Rise and fall times are not limited. Fast edges may lead to system EMI problems, whilst slow edges are susceptible to noise.

LOW-level output current

on pins INT and SDA

−2

−7-

mA

on pins INT and SDA

−0.4

−1-

mA

output leakage current

on pins SDA and INT

−200

0

+200

nA

Table 11.

otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

C

Litg

()

C

OSCI

C

OSCO

⋅

()

C

OSCI

C

OSCO

+

()

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

=

Table 12.

Dynamic characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Timing characteristics: serial bus

SCL clock frequency

-

-

1

MHz

LOW period of the SCL clock

500

-

-

ns

HIGH period of the SCL clock

260

-

-

ns

bus free time between a STOP and

START condition

500

-

-

ns

hold time (repeated) START condition

260

-

-

ns

set-up time for a repeated START

condition

260

-

-

ns

rise time of both SDA and SCL signals

[2]

-10

-

ns

fall time of both SDA and SCL signals

[2]

-10

-

ns

data set-up time

50

-

-

ns

data hold time

0

-

-

ns

set-up time for STOP condition

260

-

-

ns

data valid time

75

-

450

ns

capacitive load for each bus line

-

-

50

pF

Timing characteristics: INT

interrupt pulse width

20

40

80

µs