Datasheet

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