pca8885 NXP Semiconductors, pca8885 Datasheet - Page 29

• Manufacturer Part Number: pca8885
• Description: Capacitive 8-channel Proximity Switch With Auto-calibration And Very Low Power Consumption
• Manufacturer: NXP Semiconductors

NXP Semiconductors
17. Dynamic characteristics
Table 14.
[1]
PCA8885
Symbol Parameter
System timing
t
f
t
I
t
f
t
t
t
t
t
t
t
t
t
t
C
t
t
t
Objective data sheet
startup
osc
sw
2
SP
SCL
HD;STA
SU;STA
LOW
HIGH
HD;DAT
SU;DAT
r
f
SU;STO
BUF
VD,DAT
VD,ACK
w(int)
C interface characteristics (SDA, SCL)
b
Default value.
start-up time
oscillator frequency
switching time
pulse width of spikes that must be
suppressed by the input filter
SCL clock frequency
hold time (repeated) START condition
set-up time for a repeated START condition
LOW period of the SCL clock
HIGH period of the SCL clock
data hold time
data set-up time
rise time of both SDA and SCL signals
fall time of both SDA and SCL signals
set-up time for STOP condition
bus free time between a STOP and START
condition
capacitive load for each bus line
data valid time
data valid acknowledge time
interrupt pulse width
Dynamic characteristics
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 24 November 2011
Capacitive 8-channel proximity switch with auto-calibration
Conditions
C
internal RC oscillator
f
interrupt over I
s
CPC
= 1 kHz
FRQF[2:0] = 111
FRQF[2:0] = 100
FRQF[2:0] = 000
= 100 nF; f
2
C
s
= 1 kHz
[1]
Min
-
90
52
20
-
0
0
0.26
0.26
0.5
0.26
0
50
-
-
0.26
0.5
-
-
-
-
Typ
200
112
70
36
64
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2
PCA8885
© NXP B.V. 2011. All rights reserved.
Max
-
140
87
44
-
50
1 000
-
-
-
-
-
-
120
120
-
-
550
0.45
0.45
-
29 of 43
Unit
ms
kHz
kHz
kHz
ms
ns
kHz
s
s
s
s
ns
ns
ns
ns
s
s
pF
s
s
s