Texas Instruments ISO7240MDWR

Overview

ISO7240MDWR from Texas Instruments is a quad-channel, unidirectional digital isolator with CMOS input thresholds, 150 Mbps signaling rate, 1 ns max channel-to-channel output skew, and 2 ns max pulse-width distortion. It employs silicon-dioxide (SiO₂) isolation barrier and supports dual 3.3V/5V supplies for input/output sides independently - used in industrial fieldbus interfaces requiring high noise immunity and precise timing alignment.

For engineers reviewing the ISO7240MDWR datasheet, ISO7240MDWR pinout, ISO7240MDWR application, or ISO7240MDWR equivalent, key selection criteria include its M-suffix CMOS V_CC/2 input threshold (no input noise filter), 150 Mbps high-speed operation, 1 ns output skew tolerance, and SOIC-16 DW package compatibility with factory automation and servo control signal isolation.

Technical Context

The ISO7240MDWR implements four identical unidirectional channels isolated by a monolithic SiO₂ barrier, enabling galvanic separation between input-side logic (V_CC1/GND₁) and output-side logic (V_CC2/GND₂). Its CMOS input structure (V_CC/2 threshold) eliminates the input noise filter found in C-suffix variants, reducing propagation delay while increasing susceptibility to fast transients.

It features independent supply domains, 5V-tolerant inputs regardless of V_CC1 level, and supports mixed-voltage operation (e.g., 5V input / 3.3V output). The device meets DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, and IEC 62368-1 safety standards with 2500 V_RMS isolation rating and 560 V_PK repetitive peak voltage.

Key Specifications

Pinout & Package

ISO7240MDWR is housed in a 16-pin SOIC (DW) package with 10.30 mm × 10.30 mm footprint and standard 1.27 mm pitch. The package provides reinforced creepage and clearance (8 mm each) compliant with IEC 60664-1 for Pollution Degree 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel digital isolator applications.

Compared with ISO7240CDWR and ADUM140E0BRWZ, ISO7240MDWR offers the highest certified safety rating (VDE 0884-17), lowest output skew, and CMOS-input speed advantage - making it optimal for time-critical industrial motion control where deterministic latency and safety compliance are jointly required.

Availability

ISO7240MDWR is available at Aetrix Electronics and suitable for factory automation, servo control, and data acquisition systems requiring stable component supply, long-lifecycle support, and certified reinforced isolation.

Supply support for ISO7240MDWR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and communications markets.

The ISO7240x family was designed specifically for high-speed, safety-certified digital signal isolation in industrial automation, motor control, and energy infrastructure - emphasizing timing precision, long-term reliability (>25-year lifetime), and regulatory compliance.

FAQ

What is the maximum signaling rate supported by ISO7240MDWR?

The ISO7240MDWR supports a maximum signaling rate of 150 Mbps under recommended operating conditions. This is validated for both 3.3V and 5V supply configurations, with typical jitter of 1 ns peak-to-peak at 150 Mbps NRZ input. The M-suffix variant achieves this higher rate due to its CMOS input structure and absence of input filtering delay.

Does ISO7240MDWR have a failsafe output function like ISO7240CF?

No, ISO7240MDWR does not include a failsafe output function. Unlike the ISO7240CF (which uses pin 10 as CTRL for selectable high/low failsafe state), the ISO7240MDWR has no CTRL pin functionality - pin 10 is assigned to EN (output enable) and operates as a standard active-high enable for all four output channels.

What is the input threshold type for ISO7240MDWR, and how does it differ from ISO7240CDWR?

The ISO7240MDWR uses CMOS input thresholds (V_CC1/2) with no internal noise filter, resulting in lower propagation delay and higher speed. In contrast, ISO7240CDWR uses TTL thresholds (2 V/0.8 V) with an input noise filter that improves transient immunity but limits max rate to 25 Mbps and increases PWD.

Can ISO7240MDWR operate with different supply voltages on input and output sides?

Yes, ISO7240MDWR supports independent V_CC1 and V_CC2 supplies ranging from 3.15 V to 5.5 V each. Valid combinations include 5V input / 3.3V output, 3.3V input / 5V output, or matched 3.3V/3.3V or 5V/5V operation - enabling seamless level translation without external circuitry.

Which safety certifications apply to ISO7240MDWR?

ISO7240MDWR is certified to DIN EN IEC 60747-17 (VDE 0884-17), UL 1577 (2500 V_RMS for 60 s), and IEC 62368-1. These certifications validate its reinforced insulation performance, including 560 V_PK repetitive peak voltage, 4000 V_PK transient isolation voltage, and ≥10¹² Ω isolation resistance at 25°C.