CryptoCompanion™ Chip
7
5277DS–CryptoCompanion–9/09
Table 4. 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®
