PCA9531PW,118【PDF 16/27 页】IC LED DRIVER RGB 16-TSSOP

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NXP Semiconductors

PCA9531

8-bit I 2 C-bus LED dimmer

11. Dynamic characteristics

Table 13.

Dynamic characteristics

Symbol

Parameter

Conditions

Standard-mode

Fast-mode I 2 C-bus

Unit

I 2 C-bus

Min

Max

Min

Max

f SCL

t BUF

SCL clock frequency

bus free time between a STOP and

0

4.7

100

-

0

1.3

400

-

kHz

μ s

START condition

t HD;STA

t SU;STA

hold time (repeated) START condition

set-up time for a repeated START

4.0

4.7

-

-

0.6

0.6

-

-

μ s

μ s

condition

t SU;STO

t HD;DAT

set-up time for STOP condition

data hold time

4.0

0

-

-

0.6

0

-

-

μ s

ns

t VD;ACK

data valid acknowledge time

[1]

-

600

-

600

ns

t VD;DAT

t SU;DAT

t LOW

t HIGH

t r

t f

t SP

data valid time

data set-up time

LOW period of the SCL clock

HIGH period of the SCL clock

rise time of both SDA and SCL signals

fall time of both SDA and SCL signals

pulse width of spikes that must be

LOW-level

HIGH-level

[2]

[2]

-

-

250

4.7

4.0

-

-

-

600

1500

-

-

-

1000

300

50

-

-

100

1.3

0.6

0.1C b [3]

20 +

0.1C b [3]

20 +

-

600

600

-

-

-

300

300

50

ns

ns

ns

μ s

μ s

ns

ns

ns

suppressed by the input ?lter

Port timing

t v(Q)

t su(D)

t h(D)

data output valid time

data input set-up time

data input hold time

-

100

1

200

-

-

-

100

1

200

-

-

ns

ns

μ s

Reset

t w(rst)

t rec(rst)

reset pulse width

reset recovery time

6

0

-

-

6

0

-

-

ns

ns

t rst

reset time

[4][5]

400

-

400

-

ns

[1]

[2]

[3]

[4]

[5]

t VD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW.

t VD;DAT = minimum time for SDA data output to be valid following SCL LOW.

C b = total capacitance of one bus line in pF.

Resetting the device while actively communicating on the bus may cause glitches or errant STOP conditions.

Upon reset, the full delay will be the sum of t rst and the RC time constant of the SDA bus.

PCA9531_6

? NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 06 — 19 February 2009

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