The CSMR540 is a power MOSFET optocoupler housed in an 8-pin dual-in-line hermetic ceramic package, designed for applications where independent switches with radiation-tolerant performance are necessary. With 1500 VDC isolation between input/output isolated relays, the CSMR540 is well-suited for solid-state relay applications. Its performance is rated for the full military temperature range, making it ideal for demanding environments.
Functionally, the CSMR540 acts as (Single Pole Single Throw), normally open (2 Form A) solid-state relay. Each relay is activated by an input current, typically driven by a standard TTL device. The input current biases an AlGaAs emitter that is optically coupled to an integrated diode array, which in turn powers control circuitry to operate the output power MOSFET.
The device is available with screening in accordance with MIL-PRF-38534, Class K/H, or custom screening options or as COTS. The lead options support both through-hole and surface-mount assemblies, with gold-plated leads being standard, though other lead finishes are available.

Key features of the ISOCOM CSMR540 include:

• Complies to MIL-STD
• High Voltage Isolation 1500 VDC
• Output Withstand Voltage 400 V
• 8-pin DIP package
• Low Input Requirements
• High Current Ratio

Typical applications for the ISOCOM CSMR540 include:

• Space systems & radiation equipment
• Military/High Reliability Systems
• Medical Instruments
• MOS/CMOS Applications
• Logic Interfacing
• Power Supply

ISOCOM is a leading manufacturer of high-reliability optocouplers and optoelectronic components, specializing in products designed for space, military, and industrial applications. With a focus on radiation-hardened and hermetically sealed devices, ISOCOM provides components known for durability in extreme environments. To learn more about their wide range of products and industry expertise, you can visit their website at www.isocom.uk.com.