DS2401Z

DS2401Z is Maxim/Dallas’s 1-Wire 64-bit ROM device. It provides a unique, factory-programmed 64-bit identification code on a 1-Wire bus, useful for device identification, asset tracking, and anti-counterfeiting.
Key points:
- 64-bit ROM: 8 bytes total (family code 0x01, 48-bit serial number, 8-bit CRC).
- Read-only: no user data memory; the ID is fixed at manufacture.
- Interface: 1-Wire bus with a pull-up; can be parasite-powered or Vdd-powered by the host.
- Bus operations: on a 1-Wire network you can enumerate devices with Search ROM, and read the ROM with Read ROM (0x33) or address a specific device with Match ROM (0x55).
Typical use:
- Read the device’s ROM ID at startup or during pairing to uniquely identify boards or components.
Note: DS2401Z variants mainly differ in packaging/marking; electrical behavior and ROM structure remain the same as the standard DS2401.

Concise features of DS2401Z (1-Wire 64-bit ROM ID device):
- 64-bit unique ROM ID on the 1-Wire bus (8 bytes total)
- 8-byte ROM structure: 1-byte family code (01h), 6-byte serial number, 1-byte CRC
- Standard 1-Wire interface; supports parasite-power operation or external supply
- Non-volatile, factory-programmed; ROM is read-only and not user-programmable
- Built-in CRC (CRC-8) for ROM data validation
- Fully compatible with 1-Wire ROM commands: Read ROM (33h), Match ROM (55h), Skip ROM (CCh), Search ROM (F0h)
- Ideal for device identification, inventory, anti-counterfeit and security applications
- DS2401Z: RoHS/lead-free variant of the DS2401 family
Notes: It does not store user data; its primary function is a unique hardware ID on a 1-Wire network.

- Pin count: 2 pins (a two-terminal 1-Wire device: DQ/Data and GND; Vcc is supplied via parasite power on the data line if used).
- Function: 1-Wire ROM ID device that provides a unique 64-bit serial number on the 1-Wire bus. It has no user writable memory or I/O; used for device identification/addressing on MicroLAN.

Manufacturer: Maxim Integrated Products (originally Dallas Semiconductor; Dallas Semiconductor was acquired by Maxim, and Maxim is now part of Analog Devices).
What kind of company: a semiconductor company that designs and manufactures integrated circuits, especially analog, mixed-signal, and digital ICs (including 1-Wire devices).

DS2401Z is a 64‑bit unique ROM code device on the 1‑Wire bus. Common applications:
- Unique identification and traceability for components, boards, and modules
- Asset management, inventory control, and warranty/service tracking
- Anti-counterfeiting and product authentication
- Access control, secure login, and hardware-based security keys
- Licensing and copy protection for embedded software
- 1‑Wire network addressing and device provisioning in smart products
This enables hardware-level identity without extra memory.

DS2401Z uses an 8-pin SOIC (surface-mount) package.