pca9551bs3 NXP Semiconductors, pca9551bs3 Datasheet - Page 17

• Manufacturer Part Number: pca9551bs3
• Description: 8-bit I2c Led Driver With Programmable Blink Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
12. Test information
PCA9551_7
Product data sheet
Fig 21. I
Fig 22. Test circuitry for switching times
protocol
SDA
SCL
Rise and fall times refer to V
R
C
R
generators.
2
C-bus timing diagram
L
L
T
= load resistor for LEDn. R
= load capacitance includes jig and probe capacitance.
= termination resistance should be equal to the output impedance Z
t
SU;STA
t
BUF
condition
START
(S)
t
HD;STA
Rev. 07 — 23 February 2007
GENERATOR
PULSE
t
LOW
t
r
MSB
bit 7
(A7)
t
HIGH
8-bit I
IL
L
and V
for SDA and SCL > 1 k (3 mA or less current).
t
V
SU;DAT
2
t
I
f
C-bus LED driver with programmable blink rates
IH
1
/f
.
bit 6
(A6)
SCL
R T
t
DUT
V
HD;DAT
DD
V
O
(R/W)
bit 0
t
VD;DAT
C L
50 pF
acknowledge
R L
500
002aab880
(A)
V
open
V
o
DD
SS
of the pulse
t
VD;ACK
PCA9551
condition
© NXP B.V. 2007. All rights reserved.
STOP
(P)
t
SU;STO
002aab175
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