DS2401 Silicon Serial Number

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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.

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

Key Specifications: Memory: EPROM, SRAM, EEPROM, ROM, NV SRAM

Part Number

Memory Type

Memory Size

Bus Type

Real-Time Clock

PowerCap Package

With GPIO

Single Piece Module

Supply Voltage (min) (V)

Supply Voltage (max) (V)

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Operating Temp. Range (°C)

Price^*

DS2401

ROM

64bit x 1

1-Wire

2.8

FCHIP/2
ST223/3
TO92/3
TSOC/6

Yes

-40 to +85

$0.61 @ 1k

See All Memory: EPROM, SRAM, EEPROM, ROM, NV SRAM (69)

Notes:
^*This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.