Datasheet

ADP5588 Data Sheet
Rev. C | Page 4 of 28
Table 3. Comparator Input Capacitor
Parameter Symbol Min Typ Max Unit
Comparator Input Capacitor Value C
COMP
0.1 μF
Table 4. Capacitance Loading
1
Parameter Symbol Min Typ Max Unit
I/O In
p
ut Ca
p
acitance C
IN
1 10
p
F
I/O Out
p
ut Loadin
g
Ca
p
acitance C
OUT
50
p
F
Ca
p
acitive Load for Each Bus Line C
B
2
400
p
F
1
Guaranteed by design.
2
C
B
= total capacitance of one bus line in picofarads.
Table 5. AC Characteristics
1
Parameter Symbol Min Typ Max Unit
Delay from Reset Deassertion to I
2
C Access R
STD
60 μs
Keypad Unlock Timer T
KUT
7 sec
Keypad Interrupt Mask Timer T
KIMT
31 sec
Debounce T
D
50 μs
Filter Time T
TTR
0.070 12 sec
1
Guaranteed by design.
Table 6. I
2
C AC Electrical Characteristics
1
Parameter Symbol Min Typ Max Unit
SCL Clock Frequency f
SCL
400 kHz
SCL High Time t
HIGH
0.6 μs
SCL Low Time t
LOW
1.3 μs
Data Setup Time t
SU
,
DAT
100 ns
Data Hold Time t
HD
,
DAT
0 0.9 μs
Setup Time for Repeated Start t
SU
,
STA
0.6 μs
Hold Time for Start/Repeated Start t
HD
,
STA
0.6 μs
Bus Free Time for Stop and Start t
BUF
1.3 μs
Setup Time for Stop Condition t
SU
,
STO
0.6 μs
Rise Time for SCL and SDA
2
t
R
20 + 0.1 C
B
300 ns
Fall Time for SCL and SDA
2
t
F
20 + 0.1 C
B
300 ns
Pulse Width of Suppressed Spike t
SP
0 50 μs
1
Guaranteed by design.
2
t
R
and t
F
are measured between 0.3 × V
CC
and 0.7 × V
CC
.
SDA
SCL
S
S = START CONDITION
Sr = REPEATED START CONDITION
P = STOP CONDITION
Sr P S
t
LOW
t
R
t
HD, DAT
t
HIGH
t
SU, DAT
t
F
t
F
t
SU, STA
t
HD, STA
t
SP
t
SU, STO
t
BUF
t
R
07673-002
Figure 2. I
2
C Interface Timing Diagram