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DS2401P+T&R Datasheet

Download or read online Maxim Integrated DS2401P+T&R Ser#, Tsoc-Trl (Generic) Lead Free pdf datasheet.



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FEATURES
Upgrade and drop-in replacement for DS2400
— Extended 2.8 to 6.0 voltage range
— Multiple DS2401s can reside on a
®
common 1-Wire
Net
Unique, factory-lasered and tested 64-bit
registration number (8-bit family code + 48-
bit serial number + 8-bit CRC tester);
guaranteed no two parts alike
Built-in multidrop controller ensures
compatibility with other 1-Wire Net
products
8-bit family code specifies DS2401
communications requirements to reader
Presence Pulse acknowledges when the
reader first applies voltage
Low-cost TO-92, SOT-223, and TSOC
surface mount packages
Reduces control, address, data, and power to
a single pin
Zero standby power required
Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3kbits/s
TO-92 Tape & Reel version with leads bent
to 100mil spacing (default) or with straight
leads (DS2401T-SL)
Applications
— PCB Identification
— Network Node ID
— Equipment Registration
Operates over industrial temperature range of
-40°C to +85°C
1-Wire is a registered trademark of Dallas Semiconductor.
Silicon Serial Number
PIN ASSIGNMENT
TO-92
DALLAS
DS2401
1
2
3
1
2 3
BOTTOM VIEW
01rrd
1
2
See
56-G7009-001
for package outline.
PIN DESCRIPTION
TO-92,
SOT-223
Pin 1
Ground
Pin 2
Data (DQ)
Pin 3
No Connect
Pin 4
Ground
Pin 5-6
1 of 10
EV Kit Available
DS2401
TSOC PACKAGE
TOP VIEW
3.7mm x 4.0mm x 1.5mm
TOP VIEW
See Mech. Drawings
Section
Flip Chip, Top View
with Laser Mark,
Contacts Not Visible.
“rrd” = Revision/Date
TSOC
Flip Chip
Ground
Data (DQ)
Data (DQ)
Ground
No Connect
No Connect
No Connect
112006

Summary of Contents

Page 1

FEATURES Upgrade and drop-in replacement for DS2400 Extended 2.8 to 6.0 voltage range Multiple DS2401s can reside on a ® common 1-Wire Net Unique, factory-lasered and tested 64-bit registration number (8-bit family code 48- bit serial ...

Page 2

... DS2401Z DS2401Z/T&R DS2401ZT&R DS2401P DS2401P DS2401P/T&R DS2401PT&R DS2401X1 DESCRIPTION The DS2401 enhanced Silicon Serial Number is a low-cost, electronic registration number that provides an absolutely unique identity which can be determined with a minimal electronic interface (typically, a single port pin of a microcontroller). The DS2401 consists of a factory-lasered, 64-bit ROM that includes a unique 48-bit serial number, an 8-bit CRC, and an 8-bit Family Code (01h) ...

Page 3

DS2401 MEMORY MAP Figure 1 8-Bit CRC Code MSB LSB MSB DS2401 EQUIVALENT CIRCUIT Figure 2 BUS MASTER CIRCUIT Figure 3 Note: Depending on the 1-Wire communication speed and the bus load characteristics, the optimal pullup ) value will be ...

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TRANSACTION SEQUENCE The sequence for accessing the DS2401 via the 1-Wire port is as follows: Initialization ROM Function Command Read Data INITIALIZATION All transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence consists of a reset ...

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SIGNALING The DS2401 requires a strict protocol to ensure data integrity. The protocol consists of four types of signaling on one line: reset sequence with Reset Pulse and Presence Pulse, write 0, write 1, and read data. All these ...

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ROM FUNCTIONS FLOW CHART Figure ...

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INITIALIZATION PROCEDURE RESET AND PRESENCE PULSES Figure 5 RESISTOR MASTER DS2401 In order not to mask interrupt signaling by other devices on the 1-Wire bus less than 960 μ s. READ/WRITE TIMING DIAGRAM Figure 6 Write-One Time ...

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READ/WRITE TIMING DIAGRAM (contd) Figure 6 Write-zero Time Slot Read-data Time Slot RESISTOR MASTER DS2401 CRC GENERATION To validate the data transmitted from the DS2401, the bus master may generate a CRC value from the data received. ...

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ABSOLUTE MAXIMUM RATINGS Voltage on any Pin Relative to Ground Operating Temperature Range Storage Temperature Range Soldering Temperature This is a stress rating only and functional operation of the device at these or any other conditions above those indicated ...

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NOTES: 1) All voltages are referenced to ground external pullup voltage. PUP 3) Input load is to ground additional reset or communication sequence cannot begin until the reset high time has expired. 5) Read data ...

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