ABRIDGED DATA SHEET
DS2465
DeepCover Secure Authenticator with
SHA-256 Coprocessor and 1-Wire Master Function
ELECTRICAL CHARACTERISTICS (continued)
(T = -40NC to +85NC, unless otherwise noted.) (Note 1)
A
PARAMETER
Read Sample Time
SYMBOL
CONDITIONS
MIN
11.4
1.4
TYP
12
MAX
13.1
1.64
UNITS
Standard
Overdrive
Standard
Overdrive
t
Fs
MSR
1.5
See
Table 6
Write-0 Low Time
t
-5%
-5%
+9%
Fs
W0L
See
Table 6
Write-0 Recovery Time
t
Standard and overdrive
Standard and overdrive
+9%
REC0
Fs
Fs
REC0
1-Wire Time Slot
SHA-256 ENGINE
Computation Current
Computation Time
EEPROM
t
Equal to t
+ t
slot
W0L
I
t
mA
ms
CSHA
Refer to the full data sheet.
CSHA
Programming Current
I
t
(Notes 3, 7)
2
mA
ms
PROG
Programming Time for a 32-Bit
Segment
10
PROG
Write/Erase Cycling Endurance
Data Retention
N
T
T
= +85NC (Notes 8, 9)
100k
10
—
CY
A
t
= +85NC (Notes 10, 11)
Years
DR
A
SLPZ PIN
Low Level Input Voltage
V
-0.5
0.3 O V
V
V
IL
CC
0.7 O
V
+
CC
High Level Input Voltage
V
IH
V
0.5V
CC
Input Leakage Current
I
Pin at 3.63V (Note 3)
(Note 12)
0.1
FA
Fs
I
Wake-Up Time from Sleep Mode
t
200
SWUP
2
I C SCL AND SDA PINS (Note 13)
Low Level Input Voltage
High Level Input Voltage
V
-0.5
0.3 O V
V
V
IL
CC
0.7 O
V
CC(MAX)
+ 0.5V
V
IH
V
CC
Hysteresis of Schmitt Trigger
Inputs
0.05 O
V
(Note 3)
V
V
HYS
V
CC
Low Level Output Voltage at 3mA
Sink Current
V
0.4
250
50
OL
Output Fall Time from V
to
IH(MIN)
V
with a Bus Capacitance
t
(Note 3)
60
ns
ns
FA
IL(MAX)
OF
from 10pF to 400pF
Pulse Width of Spikes That Are
Suppressed by the Input Filter
t
(Note 3)
SP
Input Current with an Input
Voltage Between 0.1V
I
(Notes 3, 14)
-10
+10
CC(MAX)
I
and 0.9V
CC(MAX)
Maxim Integrated
3