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DS2401-SL Datasheet

Download or read online Maxim Integrated DS2401-SL Silicon Serial Number Unique, Factory-Lasered and Tested 64-Bit pdf datasheet.



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FEATURES
 Upgrade and Drop-In Replacement for
DS2400
Extended 2.8V to 6.0V Range
Multiple DS2401 Devices 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
16.3kbps
Functional Diagrams
 TO-92 Tape-and-Reel Version with Leads
Bent to 100-mil Spacing (Default) or with
Straight Leads (DS2401-SL)
 -40°C to +85°C Industrial Temperature
Range
APPLICATIONS
PCB Identification
Network Node ID
Equipment Registration
Pin Configurations appear at end of data sheet.
1- Wire is a registered trademark of Maxim Integrated Products, Inc.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
Silicon Serial Number
PIN CONFIGURATIONS
TO-92
DS2401
TOP VIEW
1
2
3
1
2 3
BOTTOM VIEW
Flip Chip, Top View
with Laser Mark,
01rrd
Contacts Not Visible.
“rrd” = Revision/Date
1
2
PIN DESCRIPTIONS
TO-92,
PIN
TSOC
SOT-223
1
Ground
Ground
2
Data (DQ)
Data (DQ)
3
No Connect
No Connect
4
Ground*
No Connect
5, 6
No Connect
*SOT-223 only.
19-5860; Rev 5/11
DS2401
TSOC
TOP VIEW
FLIP
CHIP
Data (DQ)
Ground

Summary of Contents

Page 1

... Directly Connects to a Single Port Pin of a Microprocessor and Communicates 16.3kbps Functional Diagrams TO-92 Tape-and-Reel Version with Leads Bent to 100-mil Spacing (Default) or with Straight Leads (DS2401-SL) -40°C to 85°C Industrial Temperature Range APPLICATIONS PCB Identification Network Node ID Equipment Registration Pin Configurations appear at end of data sheet ...

Page 2

... ORDERING INFORMATION PART DS2401 DS2401T&R DS2401-SLT&R DS2401P DS2401PT&R DS2401Z DS2401ZT&R DS2401X1-S#T Denotes a lead(Pb)-free/RoHS-compliant package. T&R/T Tape and reel Straight leads. #Denotes a RoHS-compliant device that may include lead that is exempt under the RoHS requirements. 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) ...

Page 3

... The idle state for the 1-Wire bus is high. If, for any reason, a transaction needs to be suspended, the bus MUST be left in the idle state if the transaction is to resume. If this does not occur and the bus is left low for more than 120µs, one or more of the devices on the bus may be reset. DS2401 MEMORY MAP Figure 1 8-Bit CRC Code MSB ...

Page 4

... Presence Pulse(s) transmitted by the slave(s). The Presence Pulse lets the bus master know that the DS2401 is on the bus and is ready to operate. For more details, see the 1-Wire Signaling section. ROM FUNCTION COMMANDS Once the bus master has detected a presence, it can issue one of the four ROM function commands ...

Page 5

... DS2401. During write time slots, the delay circuit determines when the DS2401 will sample the data line. For a read data time slot 0” transmitted, the delay circuit determines how long the DS2401 will hold the data line low overriding the 1 generated by the master. ...

Page 6

ROM FUNCTIONS FLOW CHART Figure 4 ...

Page 7

... 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 960µs. READ/WRITE TIMING DIAGRAM Figure 6 Write-One Time Slot RESISTOR MASTER 480µs t < RSTL 480µ ...

Page 8

... DS2401 CRC GENERATION To validate the data transmitted from the DS2401, the bus master may generate value from the data received. This generated value is compared to the value stored in the last the DS2401. If the two CRC values match, the transmission is error-free. ...

Page 9

... TSOC, SOT-223 Flip Chip This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. DC ELECTRICAL CHARACTERISTICS (T -40° ...

Page 10

... The duration of the low pulse sent by the master should be a minimum of 1μs with a maximum value as short as possible to allow time for the pullup resistor to recover the line to a high level before the 1-Wire device samples in the case of a Write-One Time or before the master samples in the case of a Read-One Time ...

Page 11

... V changed from 0.8V to 0.3V, EC table note 11 deleted ILMAX Deleted standard (Pb) parts from ordering information; changed flip chip part number from DS2401X1 to DS2401X1-S#T Deleted V from the EC table; moved V OH 5/11 into the EC table; changed soldering temperature from J-STD-020A reference to explicit package specific numbers Added Package Information and Revision History sections Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product ...

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