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Analog Devices Inc./Maxim Integrated DS2401Z
- Part No.:
- DS2401Z
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized ICs
- Package:
- TO-261-4, TO-261AA
- Description:
- IC SILICON SER NUMBER SOT223-3
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
DS2401Z - 1-Wire Silicon Serial Number
The LCDChip DS2401Z catalog entry identifies an Analog Devices / Maxim Integrated factory-programmed 64-bit 1-Wire identity device in a registered TO-261-4, TO-261AA package. It supplies a unique ROM code over a single data line and ground return.
Verify the catalog's unsuffixed ordering code against the current manufacturer ordering table and the physical lot before procurement or qualification.
Overview
DS2401Z is a silicon serial-number device, not a general-purpose EEPROM. Its factory-lasered 64-bit ROM comprises an 8-bit family code (01h), a 48-bit unique serial field, and an 8-bit CRC. A controller reads the identifier through the 1-Wire interface, which carries communication and parasitic operating power on the data conductor.
Key Advantages
A unique 48-bit serial field helps trace boards, equipment, or nodes.
1-Wire communication uses a data connection and ground return.
Search ROM enables a bus controller to enumerate several devices on one net.
No separate device supply pin is required for normal ROM reading.
Feature Summary
Family code, unique serial field, and CRC are fixed at manufacture.
Reset/presence signaling and read/search ROM commands support identification.
Several devices may share one properly designed 1-Wire net.
The catalog's four-lead SOT-223 package must be checked against the controlled outline.
Package & Footprint
The LCDChip registered package is TO-261-4, TO-261AA. The manufacturer's current table identifies the DS2401Z+ family variant as a four-pin SOT-223 device. Use the controlled outline to distinguish front/bottom pin views, lead forming, and spacing before adopting a land pattern.
- Verify the manufacturer pin-view orientation.
- Provide the specified 1-Wire pull-up and account for network loading.
- Confirm lead geometry and exact purchased ordering code.
The expected local JPG is absent and the production package URL returns HTTP 404. Keep this draft unpublished until the correct image is restored and visually checked.
Pin Functions
The manufacturer DS2401 SOT-223 pin-description table assigns:
Ground return for the 1-Wire circuit.
Bidirectional open-drain 1-Wire data and parasitic-power input.
No internal connection; do not assign a host function.
Additional ground terminal; follow the controlled SOT-223 drawing.
Confirm package top-view pin numbering and tab treatment against the manufacturer outline.
Key Specifications
| Primary function | Factory-programmed silicon serial number |
|---|---|
| ROM length | 64 bits |
| Family code | 8 bits, 01h |
| Unique serial field | 48 bits |
| Error check | 8-bit CRC |
| Interface | 1-Wire, multidrop-capable |
| Maximum stated data rate | Up to 16.3 kbps |
| DS2401 (non-A) pull-up voltage | 2.8 V to 6.0 V |
| DS2401 (non-A) pull-up resistance | 1.5 kΩ to 5 kΩ, subject to bus loading |
| Operating temperature | -40 °C to +85 °C |
| Package | Four-lead SOT-223, as registered locally |
These DS2401-family values are from the controlled data sheet, not a guarantee for an unidentified physical lot. Check exact-order-code conditions and network timing before design release.
Replacement Considerations
Current manufacturer literature lists DS2401Z+ in four-pin SOT-223 and DS2401Z+T&R with tape-and-reel delivery. DS2401+ uses TO-92 and DS2401P+ uses six-pin TSOC; these are not mechanically interchangeable with SOT-223. DS2401AZ+ is an electrical A variant with different voltage and command behavior. Validate the full ordering suffix, bus limits, board footprint, and physical lot. No unverified internal product link is added.
Manufacturer Information
Analog Devices publishes the DS2401 Silicon Serial Number data sheet, revision 12/23. Its ROM format, 1-Wire transaction sequence, SOT-223 pin descriptions, electrical table, and current ordering information inform this detail. The unsuffixed catalog record requires human confirmation against the manufacturer's current saleable ordering code and the actual inventory lot.
Applications
Associate a board with a unique factory identifier in a system record.
Identify serviceable modules and serialized equipment.
Enumerate node IDs on a properly designed 1-Wire multidrop network.
Link test or manufacturing records to a persistent hardware identity.
Quality & Authenticity
Verify the full supplied part marking, lead finish, package outline, lot documentation, and 64-bit ROM readout. CRC checks data integrity but does not make this serial-number ROM a cryptographic authenticator. Confirm uniqueness and provenance through the sourcing and production process rather than treating the catalog name alone as proof.
FAQ
Can the ID be rewritten?
No. The identifier resides in factory-programmed ROM, not user EEPROM.
Can multiple DS2401Z devices share a bus?
Yes, with a suitable 1-Wire network and Search ROM enumeration. Read ROM 33h alone is for a single device on the bus.
Is the bare DS2401Z name identical to DS2401Z+?
Do not assume so: verify the full ordering code, compliance suffix, package, and physical lot.
Is this page ready to publish?
No. The registered package image is missing from the production site.
Engineering Notice
Review the latest manufacturer data sheet for reset/presence timing, bus pull-up sizing, parasitic-power margins, ROM commands, and exact package orientation. Resolve the unsuffixed ordering-code identity and restore the registered package JPG before any formal publication. This device supplies an identifier, not secure cryptographic authentication.
DS2401Z Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Silicon Serial Number
- Applications:
- PCB, Network Node, Equipment Identification/Registration
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
- Grade:
- -
- Qualification:
- -
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