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Maxim Integrated Semiconductor Electronic Components Datasheet

DS28EC20 Datasheet

20Kb 1-Wire EEPROM

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DS28EC20
20Kb 1-Wire EEPROM
GENERAL DESCRIPTION
The DS28EC20 is a 20480-bit, 1-Wire® EEPROM
organized as 80 memory pages of 256 bits each. An
additional page is set aside for control functions.
Data is written to a 32-byte scratchpad, verified, and
then copied to the EEPROM memory. As a special
feature, blocks of eight memory pages can be write
protected or put in EPROM-Emulation mode, where
bits can only be changed from a 1 to a 0 state. The
DS28EC20 communicates over the single-conductor
1-Wire bus. The communication follows the standard
1-Wire protocol. Each device has its own unalterable
and unique 64-bit ROM registration number. The
registration number is used to address the device in
a multidrop 1-Wire net environment.
APPLICATIONS
Device Authentication
IEEE 1451.4 Sensor TEDS
Ink/Toner Cartridges
Medical Sensors
PCB Identification
Wireless Base Stations
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS28EC20+
-40°C to +85°C 3 TO-92
DS28EC20+T -40°C to +85°C 3 TO-92, T&R
DS28EC20P+ -40°C to +85°C 6 TSOC
DS28EC20P+T -40°C to +85°C 6 TSOC, T&R
DS28EC20Q+T -40°C to +85°C 6 TDFN, T&R
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
TYPICAL OPERATING CIRCUIT
VCC
RPUP (300
to 2.2k)
PX.Y
µC
I/O
DS28EC20
GND
FEATURES
20480 Bits of Nonvolatile (NV) EEPROM
Partitioned into Eighty 256-Bit Pages
Individual 8-Page Groups of Memory Pages
(Blocks) can be Permanently Write Protected or
Put in OTP EPROM-Emulation Mode ("Write to 0")
Read and Write Access Highly Backward-
Compatible to Legacy Devices (e.g., DS2433)
256-Bit Scratchpad with Strict Read/Write
Protocols Ensures Integrity of Data Transfer
200k Write/Erase Cycle Endurance at +25°C
Unique Factory-Programmed 64-Bit Registration
Number Ensures Error-Free Device Selection
and Absolute Part Identity
Switchpoint Hysteresis and Filtering to Optimize
Performance in the Presence of Noise
Communicates to Host at 15.4kbps or 90kbps
Using 1-Wire Protocol
Low-Cost TO-92 Package
Operating Range: 4V to 5.25V, -40°C to +85°C
Operating Range: 3.135V to3.465V,
0°C to +70°C (Standard Speed only)
IEC 1000-4-2 Level 4 ESD Protection (±8kV
Contact, ±15kV Air, Typical) for I/O Pin
PIN CONFIGURATION
Commands, bytes, and modes are capitalized for clarity.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
1 of 27
19-6067; Rev 7; 9/17


Maxim Integrated Semiconductor Electronic Components Datasheet

DS28EC20 Datasheet

20Kb 1-Wire EEPROM

No Preview Available !

DS28EC20: 20Kb 1-Wire EEPROM
ABSOLUTE MAXIMUM RATINGS
I/O Voltage to GND
I/O Sink Current
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10s)
Soldering Temperature (reflow)
TO-92
TSOC, TDFN
-0.5V, +6V
20mA
-40°C to +85°C
+150°C
-55°C to +125°C
+300°C
+250°C
+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 the absolute maximum rating conditions for extended periods may affect device reliability.
5.0V SUPPLY ELECTRICAL CHARACTERISTICS
(VPUP = 4V to 5.25, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
I/O PIN GENERAL DATA
1-Wire Pullup Resistance
Input Capacitance
Input Load Current
High-to-Low Switching
Threshold
Input Low Voltage
Low-to-High Switching
Threshold
Switching Hysteresis
Output Low Voltage
Recovery Time
(Notes 2, 12)
Rising-Edge Hold-off Time
(Notes 5, 13)
Timeslot Duration
(Notes 2, 14)
RPUP
CIO
IL
VTL
VIL
VTH
VHY
VOL
tREC
tREH
tSLOT
(Notes 2, 3)
(Notes 4, 5)
I/O pin at VPUP
(Notes 5, 6, 7)
(Notes 2, 8)
(Notes 5, 6, 9)
(Notes 5, 6, 10)
At 4mA (Note 11)
Standard speed
Overdrive speed
Standard speed
Overdrive speed
Standard speed
Overdrive speed
I/O PIN, 1-Wire RESET, PRESENCE DETECT CYCLE
Reset-Low Time (Note 2)
Presence-Detect High
Time
tRSTL
tPDH
Standard speed
Overdrive speed
Standard speed
Overdrive speed
Presence-Detect Low
Time
Presence-Detect Sample
Time (Notes 2, 15)
Standard speed
tPDL Overdrive speed
Standard speed
tMSP Overdrive speed
I/O PIN, 1-Wire WRITE
Write-0 Low Time
(Notes 2, 16, 17)
Write-1 Low Time
(Notes 2, 17)
Standard speed
tW0L Overdrive speed
Standard speed
tW1L Overdrive speed
I/O PIN, 1-Wire READ
Read-Low Time
(Notes 2, 18)
Standard speed
tRL Overdrive speed
Read-Sample Time
(Notes 2, 18)
Standard speed
tMSR Overdrive speed
MIN TYP MAX
0.3 2.2
2000
0.05 3.5
1.6
VPUP -
1.8
0.5
2.5
VPUP -
1.1
0.30 1.30
0.20
5
5
0.5 5.0
Not applicable (0)
65
11
480 640
48 80
15 60
26
60 240
8 24
60 75
6 10
60 120
6 15.5
1 15
12
5
0.800
tRL + δ
tRL + δ
15 - δ
2-δ
15
2.27
UNITS
k
pF
µA
V
V
V
V
V
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
2 of 27


Part Number DS28EC20
Description 20Kb 1-Wire EEPROM
Maker Maxim Integrated
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DS28EC20 Datasheet PDF






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