Datasheet
2Maxim Integrated
DS2465
DeepCover Secure Authenticator with
SHA-256 Coprocessor and 1-Wire Master Function
ABRIDGED DATA SHEET
Voltage Range on Any Pin Relative to GND ........-0.5V to +4.0V
Maximum Current into Any Pin
...........................................20mA
Operating Temperature Range
......................... -40NC to +85NC
Junction Temperature
.....................................................+150NC
Storage Temperature Range
............................ -55NC to +125NC
Lead Temperature (soldering, 10s)
................................+300NC
Soldering Temperature (reflow)
.....................................+260NC
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(T
A
= -40NC to +85NC, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
2.97 3.3 3.63 V
Supply Current I
CC
(Note 2) 750
FA
Sleep mode (SLPZ pin low), V
CC
= 3.63V 0.5 1.0
Power-On Reset Trip Point V
POR
(Note 3) 1.0 1.4 V
1-Wire Input High V
IH1
0.6 O
V
CC
V
1-Wire Input Low V
IL1
0.2 O
V
CC
V
1-Wire Weak Pullup Resistor
(Notes 3, 4)
R
WPU
Low range 375 500 750
I
High range 750 1000 1350
1-Wire Output Low V
OL1
V
CC
= 2.97V, 8mA sink current 0.25
Active Pullup On Threshold V
IAPO
(Note 3) 0.95 1.2 V
Active Pullup On Time
(Notes 3, 5)
t
APU
1-Wire time slot Equal to t
REC0
Fs
1-Wire reset standard speed 2.375 2.5 2.625
1-Wire reset overdrive speed 0.475 0.5 0.525
Active Pullup Impedance R
APU
V
CC
= 2.97V, 4mA load (Note 3) 60
I
1-Wire Output Fall Time (Note 3) t
F
Standard 0.25 1
Fs
Overdrive 0.05 0.2
IO PIN: 1-Wire TIMING (Note 6)
Reset Low Time t
RSTL
Standard
-5%
See
Table 6
+9%
Fs
Overdrive
Reset High Time t
RSTH
Standard and overdrive Equal to t
RSTL
Fs
Presence-Detect Sample Time t
MSP
Standard
-5%
See
Table 6
+9%
Fs
Overdrive
Sampling for Short and Interrupt t
SI
Standard 7.6 8 8.72
Fs
Overdrive 1.9 2 2.18
Write-1/Read Low Time t
W1L
Standard 7.6 8 8.72
Fs
Overdrive -5%
See
Table 6
+9%