ABRIDGED DATA SHEET
DS2475
DeepCover ECDSA Host Processor
with 1-Wire Master
Absolute Maximum Ratings
IO Voltage Range on Any Pin Relative to GND...-0.5V to +4.0V
Maximum Current Into Any Pin ........................................±20mA
Operating Temperature Range........................... -40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range............................ -55°C to +125°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) ......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation 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.
(Note 1)
Package Thermal Characteristics
SOT23
Junction-to-Ambient Thermal Resistance (θ ) .....74.60°C/W
Junction-to-Case Thermal Resistance (θ ).................6°C/W
JC
JA
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(T = -40°C to +85°C, unless otherwise noted) (Note 2)
A
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
MIN
TYP
3.3
MAX
3.63
2
UNITS
V
V
CC
2.97
(Note 4)
Sleep mode (SLPZ = 0.0V),
= 3.63V
1.2
mA
Supply Current (Note 3)
I
CC
50
150
nA
V
V
CC
0.6 ×
1-Wire Input High
1-Wire Input Low
V
IH1
V
CC
0.2 ×
V
IL1
V
V
CC
Low range
High range
375
750
500
750
1350
0.25
1.2
1-Wire Weak Pullup Resistor
(Notes 5, 6)
R
Ω
WPU
1000
1-Wire Output Low (Note 3)
Active Pullup On Threshold
V
V
CC
= 2.97V, 8mA sink current
V
V
OL1
V
IAPO
(Note 5)
0.95
1-Wire time slot
See APU bit description
Active Pullup On Time
(Notes 5, 7)
t
1-Wire reset standard speed
1-Wire reset overdrive speed
2.13
2.5
0.5
2.88
µs
APU
0.43
0.58
60
Active Pullup Impedance
R
V
CC
= 2.97V, 4mA load (Note 5)
Ω
APU
Standard
Overdrive
0.25
0.05
1
1-Wire Output Fall Time (Note 5)
t
µs
F
0.2
IO PIN: 1-Wire TIMING (Note 8)
Reset Low Time
See
Table 6
t
Standard and overdrive
Standard and overdrive
Standard and overdrive
-15%
-15%
+15%
+15%
µs
µs
µs
RSTL
Reset High Time
t
Equal to t
RSTL
RSTH
See
Table 6
Presence-Detect Sample Time
t
MSP
Maxim Integrated
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