DS28EL15

DeepCover Secure Authenticator

with 1-Wire SHA-256 and 512-Bit User EEPROM

2

Maxim Integrated

IO Voltage Range to GND....................................-0.5V to +4.0V

IO Sink Current...................................................................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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

IO PIN: GENERAL DATA

1-Wire Pullup Voltage

(Note 2)

1.71

1.89

V

1-Wire Pullup Resistance

300

750

I

Input Capacitance

(Notes 4, 5)

1500

pF

Input Load Current

5

19.5

F

A

High-to-Low Switching Threshold

(Notes 6, 7)

0.65 x

V

Input Low Voltage

(Notes 2, 8)

0.3

V

Low-to-High Switching Threshold

(Notes 6, 9)

0.75 x

V

Switching Hysteresis

(Notes 6, 10)

0.3

V

Output Low Voltage

0.4

V

Recovery Time

5

F

s

Time Slot Duration

(Notes 2, 13)

13

F

s

IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE

Reset Low Time

(Note 2)

48

80

F

s

Reset High Time

(Note 14)

48

F

s

Presence-Detect Sample Time

(Notes 2, 15)

8

10

F

s

IO PIN: 1-Wire WRITE

Write-Zero Low Time

(Notes 2, 16)

8

16

F

s

Write-One Low Time

(Notes 2, 16)

1

2

F

s

IO PIN: 1-Wire READ

Read Low Time

(Notes 2, 17)

1

2 -

d

F

s

Read Sample Time

(Notes 2, 17)

2

F

s

EEPROM

Programming Current

1

mA

Programming Time for a 32-Bit

Segment or Page Protection

(Note 19)

10

ms

Programming Time for the Secret

Refer to the full data sheet.

ms

ABRIDGED DATA SHEET