Cryptocompanion ™ chip – Rainbow Electronics AT88SC018 User Manual
Page 6
6
CryptoCompanion
™ Chip
5277CS–CryptoCompanion–2/09
Table 3. AC Characteristics
(1)
Applicable over recommended operating range from V
CC
= +2.7 to 3.6 V,
T
AC
= -40
o
C to 85
o
C, CL = 30pF (unless otherwise noted)
Symbol
Parameter
Min
Max
Units
f
CLK
Clock
Frequency
0
400
kHz
Clock Duty cycle
(2)
40
60
%
t
R
Rise Time - SDA, RST, PDN
(2)
300
nS
t
F
Fall Time - SDA, RST, PDN
(2)
300
nS
t
R
Rise Time - SCL
(2)
300
nS
t
F
Fall Time - SCL
(2)
300
nS
t
AA
Clock Low to Data Out Valid
900
nS
t
HD.STA
Start Hold Time
600
nS
t
SU.STA
Start Set-up Time
600
nS
t
HD.DAT
Data In Hold Time
100
nS
t
SU.DAT
Data In Set-up Time
100
nS
t
SU.STO
Stop Set-up Time
600
nS
t
DH
Data Out Hold Time
50
900
nS
Note: 1. Typical values at 25° C. Maximum values are characterized values and not test limits in production.
2. This parameter is not tested. Values are based on characterization and/or simulation data.
Figure 2. SCL: Serial Clock, SDA: Serial Data I/O®