Analog Devices Inc./Maxim Integrated DS9120+

Overview

DS9120+ from Maxim Integrated is a TO-92 socket board designed to interface 1-Wire devices-including DS2401, DS2411, and DS2431-to an RJ11-based evaluation environment. It supports parasitic and V_CC-powered operation, provides dedicated PULSE signal for OTP EPROM programming, and integrates test points and jumper-selectable power modes. Used with DS9481R USB-to-1-Wire adapter for PC-based EEPROM programming.

For engineers reviewing the DS9120+ datasheet, DS9120+ pinout, DS9120+ application, or DS9120+ equivalent, this board enables rapid validation of TO-92-packaged 1-Wire slave devices in development labs, production test fixtures, and field-programmable memory programming workflows-especially where RJ11 connectivity, jumper-configurable power delivery, and on-board signal access are required.

Technical Context

The DS9120+ implements a passive hardware interface between standard RJ11 cabling and TO-92-packaged 1-Wire devices. Its PCB routes all six RJ11 pins-including 3.3V, GND, OW (DATA), OWGND, PULSE, and GP-to corresponding socket terminals and test points without active circuitry or level-shifting.

It supports two distinct 1-Wire power configurations via jumper selection: parasitic mode (OW and OWGND only) and V_CC-powered mode (3.3V + OW + OWGND), and delivers programmable 3.3V/7V PULSE output for OTP EPROM write cycles. No microcontroller, firmware, or protocol handling is performed on-board.

Key Specifications

Availability

DS9120+ is available at Aetrix Electronics and suitable for 1-Wire device validation, OTP EPROM programming, and lab-based 1-Wire sensor/ID chip characterization requiring stable component supply and consistent RJ11 interface behavior.

Supply support for DS9120+ 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and digital ICs for industrial, communications, computing, and consumer applications.

The DS9120+ belongs to Maxim's 1-Wire accessory product line, engineered specifically to simplify physical-layer evaluation of TO-92-packaged 1-Wire slave devices using standardized RJ11 cabling and USB host adapters.

FAQ

What is the primary function of the DS9120+ socket board?

The DS9120+ socket board serves as a passive hardware interface that connects TO-92-packaged 1-Wire devices-such as DS2401, DS2411, and DS2431-to an RJ11-based evaluation system. It enables direct connection to the DS9481R USB-to-1-Wire adapter and supports both parasitic and V_CC-powered operation. The DS9120+ does not process 1-Wire protocol but provides reliable signal routing, test access, and OTP programming voltage delivery.

Which 1-Wire devices are compatible with the DS9120+?

The DS9120+ is explicitly validated for TO-92-packaged 1-Wire devices including DS2401, DS2411, DS2431, and DS28E10. Compatibility requires matching pinout and electrical interface: OW (DATA), OWGND, and optional 3.3V or PULSE supply. Devices must adhere to standard 1-Wire timing and voltage levels. The DS9120+ does not support TSOC or TDFN packages-those require DS9120P+ or DS9120Q+ variants.

How does the DS9120+ handle power delivery for 1-Wire devices?

The DS9120+ supports two power modes: parasitic (using OW and OWGND only) and V_CC-powered (via RJ11 Pin 1, 3.3V). It also provides a dedicated PULSE signal (RJ11 Pin 5) for OTP EPROM programming, configurable to deliver either 3.3V or up to 7V pulses. No onboard regulation or switching is used-the DS9120+ passes through voltages directly from the DS9481R or external source.

Does the DS9120+ include jumpers, and what are their functions?

The DS9120+ includes jumper positions for configuration, though fewer than DS9120P+ or DS9120Q+. Jumper settings determine whether the board operates in parasitic or V_CC-powered mode and route PULSE to the socket. Specific jumper population depends on the target device-for example, DS28E10 requires V_CC and PULSE enabled. Configuration guidance is provided in Maxim's DS9120 datasheet Figures 1 and 2.

Can the DS9120+ be used without the DS9481R adapter?

Yes, the DS9120+ can be used with any 1-Wire master that implements the standard RJ11 6-pin interface and matches the pin assignments in Table 1 (3.3V, GND, OW, OWGND, PULSE, GP). However, Maxim specifies full compatibility and tested operation only with the DS9481R USB-to-1-Wire adapter. Other hosts must replicate identical signal timing, voltage levels, and PULSE pulse characteristics to ensure reliable DS9120+ operation.