Overview
The ISO7242MDW is a quad-channel digital isolator produced by Texas Instruments. This device is part of the ISO7242x family, which features multiple channel configurations and output-enable functions. The ISO7242MDW has two channels in each direction, making it suitable for applications requiring bidirectional communication across an isolation barrier. The device uses Texas Instruments’ silicon-dioxide (SiO2) isolation barrier to block high voltages, isolate grounds, and prevent noise currents from interfering with sensitive circuitry. Although the ISO7242MDW is currently obsolete and no longer in production, it remains relevant for existing designs and maintenance purposes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | |
| Number of Channels | 4 | |
| Channel Configuration | 2/2 (Two channels in each direction) | |
| Data Rate | 25 and 150 Mbps | |
| Channel-to-Channel Output Skew | 1 ns Maximum | |
| Pulse Width Distortion (PWD) | 2 ns Maximum | |
| Jitter Content | 1 ns Typ at 150 Mbps | |
| Operating Temperature Range | -40°C to +125°C | |
| Voltage - Supply | 3.15 V ~ 5.5 V | |
| Voltage - Isolation | 2500 Vrms | |
| Common Mode Transient Immunity (Min) | 25 kV/µs | |
| Propagation Delay tpLH / tpHL (Max) | 23 ns, 23 ns | |
| Rise / Fall Time (Typ) | 2 ns, 2 ns | |
| ESD Protection | 4 kV |
Key Features
- 25 and 150 Mbps signaling rate options
- Low channel-to-channel output skew; 1 ns maximum
- Low pulse-width distortion (PWD); 2 ns maximum
- Low jitter content; 1 ns typical at 150 Mbps
- Selectable default output (for ISO7240CF models)
- > 25-year life at rated working voltage
- 4 kV ESD protection
- Operates with 3.3V or 5V supplies
- High electromagnetic immunity
- Safety-related certifications: DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1
Applications
- Factory Automation: Modbus, Profibus™, DeviceNet™ data buses
- Computer Peripheral Interface
- Servo Control Interface
- Data Acquisition
Q & A
- What is the primary function of the ISO7242MDW?
The ISO7242MDW is a quad-channel digital isolator that provides electrical isolation between two parts of a system while allowing data to be transferred between them.
- What are the signaling rate options for the ISO7242MDW?
The device supports signaling rates of 25 Mbps and 150 Mbps.
- What is the maximum channel-to-channel output skew of the ISO7242MDW?
The maximum channel-to-channel output skew is 1 ns.
- What is the operating temperature range of the ISO7242MDW?
The device operates over a temperature range of -40°C to +125°C.
- What are the supply voltage options for the ISO7242MDW?
The device can operate with supply voltages ranging from 3.15 V to 5.5 V.
- What is the isolation voltage rating of the ISO7242MDW?
The isolation voltage rating is 2500 Vrms.
- Does the ISO7242MDW have ESD protection?
Yes, the device has 4 kV ESD protection.
- What safety certifications does the ISO7242MDW hold?
The device holds certifications such as DIN EN IEC 60747-17, UL 1577, IEC 61010-1, and IEC 62368-1.
- What are some common applications for the ISO7242MDW?
Common applications include factory automation, computer peripheral interfaces, servo control interfaces, and data acquisition.
- Is the ISO7242MDW still in production?
No, the ISO7242MDW is currently obsolete and no longer in production.
