Analog Devices Inc./Maxim Integrated DS28E17Q+

Overview

The DS28E17Q+ from Analog Devices is a 1-Wire-to-I2C controller bridge IC that enables I2C peripherals-including ADCs, DACs, display controllers, and sensors-to operate over a single-conductor 1-Wire bus. It supports standard (15 kbps) and overdrive (77 kbps) 1-Wire speeds, I2C clock stretching, and 100 kHz / 400 kHz I2C operation. Its unique 64-bit ROM ID enables secure node addressing in multidrop networks for industrial sensor hubs and accessory authentication systems.

For engineers reviewing the DS28E17Q+ datasheet, DS28E17Q+ pinout, DS28E17Q+ application, or DS28E17Q+ equivalent, key selection considerations include 1-Wire/I2C protocol translation latency, sleep-mode current (0.3 µA typ), 100-meter standard-speed reach, and compatibility with existing 1-Wire infrastructure and I2C peripheral voltage levels (2.45–3.6 V).

Technical Context

The DS28E17Q+ integrates a full 1-Wire physical layer (open-drain IO with RPUP support up to 2.2 kΩ), a dedicated I2C bus controller (SCL/SDA with clock stretching), and a packetized command/data translation engine. It implements both standard and overdrive 1-Wire timing modes, with automatic mode switching via Overdrive-Skip ROM or Overdrive-Match ROM commands.

Its internal architecture includes a transparent I2C buffer, CRC16 validation on all 1-Wire packets, and hardware-level error detection signaled via the ED pin. The device operates as a 1-Wire slave only-never a bus master-and requires no external microcontroller firmware for basic I2C bridging, relying instead on standardized 1-Wire ROM and device commands.

Key Specifications

Pinout & Package

DS28E17Q+ uses a 4 mm × 4 mm × 0.75 mm 16-pin TQFN package with exposed pad (EP), rated for -40°C to +85°C operation and JEDEC-compliant thermal resistance (θJA = 40°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-Wire-to-I2C bridge applications.

Compared with MAX31826ATM+ and DS28E05Q+, the DS28E17Q+ uniquely delivers full programmable I2C bus mastering over 1-Wire-including clock stretching, dual-speed operation, and hardware error signaling-making it the only viable option for connecting arbitrary I2C peripherals to legacy 1-Wire infrastructure.

Availability

DS28E17Q+ is available at Aetrix Electronics and suitable for industrial sensor hubs, medical accessory authentication systems, and battery-powered data loggers requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for DS28E17Q+ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The DS28E17Q+ belongs to Analog Devices' secure connectivity product line, designed specifically to extend trusted 1-Wire networks into complex I2C-based subsystems while maintaining cryptographic identity and low-power operation.

FAQ

What is the primary function of the DS28E17Q+?

The DS28E17Q+ is a dedicated 1-Wire-to-I2C controller bridge IC that enables standard and fast-mode I2C peripherals (e.g., sensors, ADCs, display drivers) to be controlled over a single-conductor 1-Wire bus. It handles protocol translation, timing synchronization, CRC validation, and error reporting without host MCU intervention. The DS28E17Q+ does not require firmware updates or configuration registers to perform basic bridging-operation is defined entirely by standardized 1-Wire ROM and device commands.

Does the DS28E17Q+ support I2C clock stretching?

Yes, the DS28E17Q+ fully supports I2C clock stretching as a native feature of its integrated I2C controller. When an attached I2C peripheral holds SCL low to delay data transfer, the DS28E17Q+ automatically extends the I2C clock cycle and maintains synchronization with the 1-Wire host. This behavior is hardware-implemented and requires no configuration-ensuring reliable communication with slow or busy I2C slaves like EEPROMs or certain sensors. The DS28E17Q+ guarantees compliance with I2C standard and fast mode timing specifications even under clock stretch conditions.

How does the DS28E17Q+ manage power consumption in battery-operated systems?

The DS28E17Q+ achieves ultra-low power operation through hardware-controlled sleep modes: it draws just 0.3 µA typical in sleep state and transitions to 2.6 mA during active I2C transactions. Sleep is triggered via dedicated SLEEP pin (falling edge) or 1-Wire command, while wakeup occurs on WAKEUP pin (rising edge) or 1-Wire activity. The AWAKE pin provides push-pull status feedback, allowing companion devices (e.g., sensors, MCUs) to synchronize their own power states. This deterministic, pin-driven power management makes the DS28E17Q+ ideal for multi-year battery life in remote sensor nodes-without relying on software timers or host coordination.

Can multiple DS28E17Q+ devices coexist on the same 1-Wire bus?

Yes, multiple DS28E17Q+ devices can coexist on a single 1-Wire bus alongside other 1-Wire peripherals. Each DS28E17Q+ has a factory-programmed, globally unique 64-bit ROM ID (family code 0x19), enabling individual addressing via Match ROM or Search ROM commands. The DS28E17Q+ implements full 1-Wire multidrop arbitration-ensuring no bus contention during initialization or data transfer. In practice, dozens of DS28E17Q+ units can be deployed on one bus, each managing its own I2C peripheral, with the host selecting targets via their ROM IDs. This capability is fundamental to scalable sensor hub and modular accessory architectures.

What package type and thermal characteristics does the DS28E17Q+ use?

The DS28E17Q+ is packaged in a 4 mm × 4 mm × 0.75 mm 16-pin TQFN with exposed pad (EP), optimized for industrial temperature operation (-40°C to +85°C). Its thermal resistance is characterized per JEDEC JESD51-7: junction-to-ambient (θJA) is 40°C/W on a four-layer board, and junction-to-case (θJC) is 6°C/W. The EP must be soldered to a GND plane or thermally isolated copper area to achieve these ratings. This compact, thermally efficient package allows integration into space-constrained modules-such as handheld diagnostic tools or dense sensor arrays-while maintaining reliability under continuous I2C traffic and ambient temperatures up to +85°C. The DS28E17Q+ datasheet specifies absolute maximum ratings including 300°C lead temperature (10 s) and 260°C reflow profile compliance.