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Status
Part Number	Status
DS2401	Active: In production, but some versions are no longer available. See Ordering Information.

Data Sheet

FULL DATA SHEET (PDF, 272kB) Download   E-Mail

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). Data is transferred serially via the 1-Wire® protocol that requires only a single data lead and a ground return. Power for reading and writing the device is derived from the data line itself with no need for an external power source. The DS2401 is an upgrade to the DS2400. The DS2401 is fully reverse-compatible with the DS2400 but provides the additional multi-drop capability that enables many devices to reside on a single data line. The familiar TO-92, SOT-223 or TSOC package provides a compact enclosure that allows standard assembly equipment to handle the device easily.

An evaluation kit is available:  DS9090K  

Key Features		Applications/Uses
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		Equipment Registration Network-Node Identification PCB Identification Reference Design License Management

Diagram

Pin Assignment

Application Notes

Application Note 27: Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products - DS2401 Application Note 74: Reading and Writing 1-Wire® Devices Through Serial Interfaces - DS2401 Application Note 126: 1-Wire® Communication Through Software - DS2401 Application Note 148: Guidelines for Reliable Long Line 1-Wire® Networks - DS2401 Application Note 155: 1-Wire® Software Resource Guide Device Description - DS2401 Application Note 178: Printed Circuit Board Identification Using 1-Wire® Products - DS2401 Application Note 186: Creating Global Identifiers Using 1-Wire® Devices - DS2401 Application Note 187: 1-Wire Search Algorithm - DS2401 Application Note 192: Using the DS2480B Serial 1-Wire Line Driver - DS2401 Application Note 214: Using a UART to Implement a 1-Wire Bus Master - DS2401 Application Note 244: Advanced 1-Wire Network Driver - DS2401 Application Note 1097: White Paper 2: Using the 1-Wire® Public Domain Kit - DS2401 Application Note 1100: White Paper 5: Using 1-Wire APIs for Data Sheet Commands - DS2401 Application Note 3377: Maxim Wafer-Level Package Assembly Guide - DS2401 Application Note 3438: Serial Digital Data Networks - DS2401 Application Note 3967: Selecting a Serial Bus - ds2401 Application Note 3989: Add Control, Memory, Security, and Mixed-Signal Functions with a Single Contact - DS2401 Application Note 4002: Understanding Flip-Chip and Chip-Scale Package Technologies and Their Applications - DS2401

Evaluation Kits

DS9090K

Design Guides

1-Wire® Products (PDF)

Reliability Reports

Reliability Report: DS2401.pdf

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-16 of 16

DS2401	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2401X1#U			Active	CSP;2 pin;1 mm² Outline Drawing: 21-0378 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: BF211-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2401X1			Active	CSP;2 pin;1 mm² Outline Drawing: 21-0378 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: BF211-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2401Z+			Active	SOT-223;3 pin;48.9 mm² Outline Drawing: 21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2401Z+T&R			Active	SOT-223;3 pin;48.9 mm² Outline Drawing: 21-0264 (PDF) Land Pattern: Not Available Use pkgcode/variation: K3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2401/T&R		N/A	No Longer Available	TO92;3 pin;27.6 mm² Outline Drawing: 21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2401/T&R/SL		N/A	No Longer Available	TO92;3 pin;19.5 mm² Outline Drawing: 21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2401		N/A	No Longer Available	TO92;3 pin;19.5 mm² Outline Drawing: 21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2401+			Active	TO92;3 pin;19.5 mm² Outline Drawing: 21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2401+T&R			Active	TO92;3 pin;27.6 mm² Outline Drawing: 21-0250 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2401-SL+T&R			Active	TO92;3 pin;19.5 mm² Outline Drawing: 21-0248 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: Q3+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2401AP-02B-06/FUJITSU		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS2401AP-02B-09/T&R		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS2401AP-044-0962		N/A	No Longer Available	Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS2401P		N/A	No Longer Available	TSOC;6 pin;17.8 mm² Outline Drawing: 21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
DS2401P+			Active	TSOC;6 pin;17.8 mm² Outline Drawing: 21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2401P+T&R			Active	TSOC;6 pin;17.8 mm² Outline Drawing: 21-0382 (PDF) Land Pattern: 90-0321 (PDF) Use pkgcode/variation: D6+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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