DS28EL22

DeepCover Secure Authenticator with

4

Maxim Integrated

Pin Configuration

Typical Operating Characteristics

Pin Description

ELECTRICAL CHARACTERISTICS (continued)

valid Compute and Lock Secret sequence, immediately after the trailing rising edge on IO for the last time slot of the

first cyclic redundancy check (CRC-16) of a Compute and Read Page MAC sequence, immediately after the trailing

rising edge on IO for the last time slot of the second CRC-16 byte of an Authenticated Write Memory sequence, imme-

diately after the trailing rising edge on IO for the last time slot of the CRC-16 of an Authenticated Write Page Protection

sequence. The interval ends once the device’s self-timed SHA-256 computation cycle is complete and the current drawn

PIN

NAME

FUNCTION

1, 4,

5, 6

N.C.

Not Connected

2

IO

1-Wire Bus Interface. Open-drain signal

that requires an external pullup resistor.

3

GND

Ground Reference

—

EP

Exposed Pad. Solder evenly to the

board’s ground plane for proper

operation. Refer to Application Note

3273: Exposed Pads: A Brief Introduction

for additional information.

16

N.C.

N.C.

25

IO

N.C.

34

GND

N.C.

TDFN

(3mm × 3mm)

TOP VIEW

DS28EL22

+

EP

POWER-UP TIME

TEMPERATURE (°C)

80

60

0

20

40

-20

20

40

60

80

100

120

140

160

180

0

-40

ABRIDGED DATA SHEET

1-Wire SHA-256 and 2Kb User EEPROM