PCA9531 Philips Semiconductors (Acquired by NXP), PCA9531 Datasheet - Page 12

• Manufacturer Part Number: PCA9531
• Description: 8-bit I2C Led Dimmerthe PCA9531 is an 8-bit i C And Smbus I/o Expander Optimized For Dimming Leds in 256 Discrete Steps For Red/green/blue (RGB) Color Mixing And Back Light Applications. The PCA9531 Contains an Internal Oscillator With Two User Progr
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
AC SPECIFICATIONS
NOTES:
1. C
2. t
3. t
4. Resetting the device while actively communicating on the bus may cause glitches or errant STOP conditions.
5. Upon reset, the full delay will be the sum of t
2003 Nov 10
Port Timing
Reset
8-bit I
t
t
VD;DAT
SYMBOL
SYMBOL
VD;DAT
t
VD;ACK
VD;DAT
RESET
t
t
t
t
t
b
t
SU;STO
VD;ACK
HD;STA
SU;STA
HD;DAT
SU;DAT
t
t
t
f
t
HIGH
= total capacitance of one bus line in pF.
LOW
BUF
t
t
t
t
REC
SCL
t
t
t
SP
PV
PS
PH
W
R
F
4,5
(H)
(L)
= minimum time for SDA data out to be valid following SCL low.
= time for Acknowledgement signal from SCL low to SDA (out) low.
2
C LED dimmer
Operating frequency
Bus free time between STOP and START conditions
Hold time after (repeated) START condition
Repeated START condition setup time
Setup time for STOP condition
Data in hold time
Valid time for ACK condition
Data out valid time
Data out valid time
Data setup time
Clock LOW period
Clock HIGH period
Clock/Data fall time
Clock/Data rise time
Pulse width of spikes that must be suppressed by the
input filters
Output data valid
Input data setup time
Input data hold time
Reset pulse width
Reset recovery time
Time to reset
3
3
PARAMETER
PARAMETER
RESET
2
and the RC time constant of the SDA bus.
12
STANDARD MODE I
MIN
250
100
400
4.7
4.0
4.7
4.0
4.7
4.0
—
—
—
—
—
—
—
0
0
1
6
0
BUS
MAX
1500
1000
100
600
600
300
200
50
—
—
—
—
—
—
—
—
—
—
—
—
—
2
C
20 + 0.1 C
20 + 0.1 C
MIN
100
100
400
1.3
0.6
0.6
0.6
1.3
0.6
FAST MODE
—
—
—
—
—
0
0
1
6
0
I
2
C BUS
b
b
1
1
MAX
400
600
600
600
300
300
200
50
—
—
—
—
—
—
—
—
—
—
—
—
—
PCA9531
Product data
UNITS
UNITS
kHz
µs
µs
µs
µs
ns
ns
ns
ns
ns
µs
µs
ns
ns
ns
ns
ns
µs
ns
ns
ns