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Maxim Integrated Semiconductor Electronic Components Datasheet

DS2431 Datasheet

1-Wire EEPROM

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DS2431
1024-Bit, 1-Wire EEPROM
General Description
The DS2431 is a 1024-bit, 1-Wire® EEPROM chip orga-
nized as four memory pages of 256 bits each. Data is
written to an 8-byte scratchpad, verified, and then copied
to the EEPROM memory. As a special feature, the four
memory pages can individually be write protected or
put in EPROM-emulation mode, where bits can only be
changed from a 1 to a 0 state. The DS2431 communi-
cates over the single-conductor 1-Wire bus. The com-
munication follows the standard 1-Wire protocol. Each
device has its own unalterable and unique 64-bit ROM
registration number that is factory lasered into the chip.
The registration number is used to address the device in
a multidrop, 1-Wire net environment.
Applications
Accessory/PCB Identification
● Medical Sensor Calibration Data Storage
● Analog Sensor Calibration Including IEEE P1451.4
Smart Sensors
Ink and Toner Print Cartridge Identification
● After-Market Management of Consumables
Typical Operating Circuit
VCC
µC
RPUP
IO
DS2431
GND
Pin Configurations appear at end of data sheet.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
Benefits and Features
● Easily Add Traceability and Relevant Information to
Any Individual System
• 1024 Bits of EEPROM Memory Partitioned Into
Four Pages of 256 Bits
• Individual Memory Pages Can Be Permanently
Write Protected or Put in EPROM-Emulation Mode
(Write to 0)
• Switchpoint Hysteresis and Filtering to Optimize
Performance in the Presence of Noise
● Minimalist 1-Wire Interface Lowers Cost and
Interface Complexity
• IEC 1000-4-2 Level 4 ESD Protection
(±8kV Contact, ±15kV Air, typ)
• Reads and Writes Over a Wide Voltage Range
from 2.8V to 5.25V from -40°C to +85°C
• Communicates to Host with a Single Digital Signal
at 15.4kbps or 125kbps
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
DS2431+
-40°C to +85°C 3 TO-92
DS2431+T&R
-40°C to +85°C 3 TO-92
DS2431P+
-40°C to +85°C 6 TSOC
DS2431P+T&R -40°C to +85°C 6 TSOC
DS2431G+U
-40°C to +85°C 2 SFN (6mm x 6mm)
DS2431G+T&R
-40°C to +85°C
2 SFN (6mm x 6mm)
(2.5k pcs)
DS2431GA+U
-40°C to +85°C 2 SFN (3.5mm x 6.5mm)
DS2431GA+T&R
-40°C to +85°C
2 SFN (3.5mm x 6.5mm)
(2.5k pcs)
DS2431Q+T&R -40°C to +85°C 6 TDFN-EP* (2.5k pcs)
DS2431X-S+
-40°C to +85°C 3x3 UCSPR (2.5k pcs)
DS2431X+
-40°C to +85°C 3x3 UCSPR (10k pcs)
Note: The leads of TO-92 packages on tape and reel are
formed to approximately 100-mil (2.54mm) spacing. For details,
refer to the package outline drawing.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
*EP = Exposed pad.
19-4675; Rev 15; 3/15


Maxim Integrated Semiconductor Electronic Components Datasheet

DS2431 Datasheet

1-Wire EEPROM

No Preview Available !

DS2431
1024-Bit, 1-Wire EEPROM
Absolute Maximum Ratings
IO Voltage Range to GND........................................-0.5V to +6V
IO Sink Current....................................................................20mA
Operating Temperature Range.............................-40°C to +85°C
Junction Temperature........................................................+150°C
Storage Temperature Range..............................-55°C to +125°C
Lead Temperature (excluding UCSP, soldering, 10s).......+300°C
Soldering Temperature (reflow)
TO-92............................................................................+250°C
AIl other packages, excluding SFN...............................+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.
Electrical Characteristics
(TA = -40°C to +85°C.) (Note 1)
PARAMETER
IO PIN: GENERAL DATA
1-Wire Pullup Voltage
1-Wire Pullup Resistance
Input Capacitance
Input Load Current
SYMBOL
CONDITIONS
VPUP
RPUP
CIO
IL
(Note 2)
(Notes 2, 3)
(Notes 4, 5)
IO pin at VPUP
High-to-Low Switching Threshold
VTL (Notes 5, 6, 7)
Input Low Voltage
VIL (Notes 2, 8)
Low-to-High Switching Threshold
VTH (Notes 5, 6, 9)
Switching Hysteresis
Output Low Voltage
Recovery Time
(Notes 2,12)
Rising-Edge Hold-Off Time (Notes
5, 13)
VHY
VOL
tREC
tREH
(Notes 5, 6, 10)
At 4mA (Note 11)
Standard speed, RPUP = 2.2kΩ
Overdrive speed, RPUP = 2.2kΩ
Overdrive speed, directly prior to reset
pulse; RPUP = 2.2kΩ
Standard speed
Overdrive speed
Time Slot Duration
(Notes 2, 14)
tSLOT
Standard speed
Overdrive speed
IO PIN: 1-Wire RESET, PRESENCE-DETECT CYCLE
Reset Low Time (Note 2)
tRSTL
Standard speed
Overdrive speed
Presence-Detect High Time
Presence-Detect Low Time
Presence-Detect Sample Time
(Notes 2, 15)
tPDH
tPDL
tMSP
Standard speed
Overdrive speed
Standard speed
Overdrive speed
Standard speed
Overdrive speed
MIN TYP MAX UNITS
2.8
0.3
0.05
0.5
1.0
0.21
5
2
5.25
2.2
1000
6.7
VPUP -
1.8
0.5
VPUP -
1.0
1.70
0.4
5
0.5 5.0
Not applicable (0)
65
8
V
kΩ
pF
µA
V
V
V
V
V
µs
µs
µs
480 640
µs
48 80
15 60
µs
26
60 240
µs
8 24
60 75
µs
6 10
www.maximintegrated.com
Maxim Integrated 2


Part Number DS2431
Description 1-Wire EEPROM
Maker Maxim Integrated
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DS2431 Datasheet PDF






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