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
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.
* 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
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS2401X1
FCHIP;2 pin;1 mm²
Dwg: 56-G7009-001A (PDF)
Use pkgcode/variation: BF211-1*
-40°C to +85°C
See data sheet
DS2401Z-02F-4D43+T
ST223;3 pin;46 mm²
Dwg: 56-G0005-001A (PDF)
Use pkgcode/variation: K3+1*
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