Analog Devices Inc./Maxim Integrated DS2430AP+T&R

Overview

DS2430AP+T&R from Analog Devices is a 256-bit 1-Wire EEPROM with 64-bit one-time programmable application register, operating from 2.8V to 5.25V across –40°C to +85°C in a 6-pin TSOC package. It delivers unique device identity via 64-bit ROM (family code 14h), supports parasitic power operation, and communicates at up to 14.3 kbps over a single data line for board identification and calibration storage.

For engineers reviewing the DS2430AP+T&R datasheet, DS2430AP+T&R pinout, DS2430AP+T&R application, or DS2430AP+T&R equivalent, this page provides verified technical context, validated pin functions, real-world use cases in embedded traceability systems, and confirmed alternative parts with documented functional distinctions.

Technical Context

The DS2430AP+T&R implements a hierarchical 1-Wire protocol requiring ROM function commands (e.g., Skip ROM CCh, Match ROM 55h) before memory access. Its memory architecture includes 256-bit EEPROM organized as one 32-byte page, a 64-bit one-time programmable application register, and an 8-bit status register indicating lock state.

It uses open-drain 1-Wire I/O with built-in multidrop controller compatibility, CRC-8 validation (polynomial X⁸+X⁵+X⁴+1), and noise-suppressed front-end with hysteresis (VHY) and rising-edge hold-off time (tREH). Communication relies on precise timing slots: tW0L ≥ 60 µs, tW1L ≤ 15 µs, tRL ≤ 15 µs, and tREC ≥ 1 µs.

Key Specifications

Pinout & Package

DS2430AP+T&R is housed in a 6-pin TSOC package with exposed pad (non-electrical). Pin 1 = Ground, Pin 2 = Data (open-drain 1-Wire I/O), Pins 3–6 = NC. The package supports reflow soldering up to +260°C and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-Wire EEPROM applications.

Compared with DS2430AP+T&R, DS2431+T&R offers scalable memory without protocol changes, while DS28EC20+T&R adds cryptographic security at the cost of higher firmware complexity and reduced write endurance - making DS2430AP+T&R optimal for cost-sensitive, non-secure traceability tasks.

Availability

DS2430AP+T&R is available at Aetrix Electronics and suitable for industrial calibration systems, embedded board identification, and asset tracking applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DS2430AP+T&R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and industrial control.

The DS2430AP+T&R belongs to Analog Devices' 1-Wire memory product line, designed specifically for ultra-low-pin-count, parasitic-powered identification and configuration storage in space-constrained embedded systems.

FAQ

What is the function of Pin 3–6 on the DS2430AP+T&R?

Pin 3 through Pin 6 on the DS2430AP+T&R are No Connect (NC) terminals with no internal bond wire or silicon connection. They may be left unconnected or tied to ground for mechanical stability, but they carry no electrical function. This is explicitly confirmed in the official pin description table for the TSOC package variant of the DS2430AP+T&R.

Does the DS2430AP+T&R require an external power supply?

No, the DS2430AP+T&R operates in parasitic power mode - it draws all operating current from the 1-Wire data line during active communication. An external VDD is not required, though a pullup resistor (0.3–2.2 kΩ) to VPUP (2.8–5.25V) must be present on the DATA line to ensure proper signal levels and timing compliance.

Can the application register of the DS2430AP+T&R be rewritten after programming?

No - the 64-bit application register in the DS2430AP+T&R is strictly one-time programmable. Once the Copy & Lock Application Register command (5Ah) with validation key A5h completes successfully, the register becomes permanently write-protected. Subsequent attempts to write will have no effect, and the status register reflects lock state via cleared LSBs (0xFC).

What is the maximum recommended pullup resistor value for reliable DS2430AP+T&R operation?

The maximum recommended pullup resistor for the DS2430AP+T&R is 2.2 kΩ when operating at standard speed (14.3 kbps) with a single device and VPUP ≥ 4.0V. For multi-device buses or low VPUP conditions, a lower value (e.g., 0.3–1.0 kΩ) or active pullup (e.g., DS2482-100) is required to meet tW0L and tREC timing constraints per the DS2430AP+T&R datasheet.

Is the DS2430AP+T&R compatible with Maxim Integrated's 1-Wire master devices?

Yes - the DS2430AP+T&R is fully compatible with Maxim Integrated 1-Wire host controllers (e.g., DS2480B, DS2482-x00) and software stacks. It adheres to the standard 1-Wire protocol hierarchy, responds to all ROM function commands (33h, 55h, CCh, F0h), and implements the same timing and electrical specifications defined in Maxim's 1-Wire documentation.