RPM7157-R Equivalent & Substitute Parts

Part Overview

The RPM7157-R is a remote receiver sensor manufactured by Rohm Semiconductor, designed for infrared signal reception at 56.9kHz with a 15-meter sensing distance. This through-hole mounted optical sensor operates within a 4.5V to 5.5V supply range and is classified as obsolete. Due to its obsolete status and limited remaining inventory lifecycle, identifying functionally compatible substitute components is essential for ongoing design support and production continuity.

Substiute Parts

RPM7157-R

Rohm SemiconductorIn Stock: 792RPM7157-R Datasheet

Current PartRFQ

IRM-2756

Everlight Electronics Co LtdIn Stock: 1130IRM-2756 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RPM7157-R is determined by the following critical parameters:

• Supply Voltage Compatibility: Substitute parts must operate within the 4.5V to 5.5V range to ensure direct integration without additional voltage regulation circuitry.
• Mounting Type: Through-hole mounting is required to maintain PCB layout compatibility and mechanical fit.
• Orientation: Side-view orientation ensures proper signal reception geometry within existing mechanical assemblies.
• B.P.F. Center Frequency: The infrared carrier frequency must be within acceptable tolerance of 56.9kHz to maintain compatibility with remote control transmitter protocols.
• Sensing Distance: Minimum 14-meter range is acceptable to preserve functional coverage in typical application scenarios.
• Current Consumption: Lower supply current is acceptable and represents an improvement in power efficiency.
• Operating Temperature Range: Substitute parts must support the minimum operating temperature of -10°C and maximum of 75°C.
• Compliance Standards: RoHS3 compliance is mandatory for regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The IRM-2756 from Everlight Electronics qualifies as a functional substitute for the RPM7157-R based on the following engineering criteria:

Voltage and Mounting Compatibility: Both components operate within the identical 4.5V to 5.5V supply range and utilize through-hole mounting with side-view orientation, ensuring direct PCB integration without redesign.

Frequency Alignment: The IRM-2756 operates at 56.0kHz, which is within acceptable tolerance of the RPM7157-R's 56.9kHz specification. This 0.9kHz variance remains within standard infrared receiver bandwidth specifications for remote control applications.

Sensing Distance: The IRM-2756 provides 14-meter sensing distance compared to the RPM7157-R's 15-meter range. This 1-meter reduction is acceptable for applications where the original 15-meter specification was not a critical design constraint.

Regulatory and Compliance Status: Both components are ROHS3 compliant. The IRM-2756 holds active product status with unlimited moisture sensitivity rating, providing superior long-term supply chain stability and storage reliability compared to the obsolete RPM7157-R.

Power Efficiency: The IRM-2756 consumes 1.2mA versus the RPM7157-R's 1.6mA, representing a 25% reduction in supply current with no functional compromise.

Temperature Operating Range: The IRM-2756 supports -25°C to 80°C, which exceeds the RPM7157-R's -10°C to 75°C range, providing enhanced thermal margin for extended environmental applications.

Frequently Asked Questions (FAQ)

Q: Can the IRM-2756 be used as a direct replacement for the RPM7157-R without PCB modifications?

A: Yes. Both components share identical supply voltage (4.5V ~ 5.5V), through-hole mounting type, and side-view orientation. No PCB layout changes are required for mechanical or electrical integration.

Q: What is the significance of the 0.9kHz frequency difference between 56.9kHz and 56.0kHz?

A: Infrared receiver sensors operate with a bandpass filter centered at the specified frequency. The 0.9kHz difference falls within the typical 3dB bandwidth of remote control receiver filters, ensuring compatibility with standard 56kHz infrared transmitter protocols used in consumer electronics.

Q: Does the 1-meter reduction in sensing distance (15m to 14m) affect system performance?

A: The sensing distance reduction is application-dependent. For typical indoor remote control applications with transmission distances under 10 meters, the 14-meter specification of the IRM-2756 provides adequate margin. Applications requiring extended range beyond 14 meters should evaluate the specific transmission distance requirements.

Q: Why is the IRM-2756 preferred despite the lower sensing distance?

A: The IRM-2756 offers active product status, unlimited moisture sensitivity rating, lower power consumption, and extended temperature range. These factors provide superior long-term availability, reliability, and operational flexibility compared to the obsolete RPM7157-R.

Q: Are there any compliance or certification differences between the two components?

A: Both components are ROHS3 compliant. The IRM-2756 carries REACH Unaffected status and EAR99 ECCN classification, consistent with the RPM7157-R. No additional compliance documentation is required for substitution.