M74HC238RM13TR

Overview

The M74HC238RM13TR is a high-speed CMOS 3-to-8 line decoder manufactured by STMicroelectronics using silicon gate C2MOS technology. It features three binary select inputs (A, B, and C) that determine which of the eight outputs goes high when enabled. The device includes three enable inputs to facilitate cascade connections in memory systems. Operating voltage ranges from 2V to 6V with a typical propagation delay of 15ns at 6V. Quiescent supply current is typically 4μA at 25°C. Noise immunity is specified at 28% VCC minimum for both high and low levels.

Feature Summary

• High-speed decoding capability utilizing silicon gate C2MOS technology
• Symmetrical output impedance ensuring balanced signal transitions
• Multiple enable inputs designed to simplify cascading and address decoding applications
• Integrated protection circuits against static discharge and transient excess voltage on all inputs

Applications

• Memory system address decoding
• Data routing applications
• Cascaded logic circuit designs

Procurement Notes

Verify the specific package type matches the design requirements, as this suffix indicates SOP packaging. Confirm the component status, as availability may vary across distributors. Ensure the operating environment stays within the specified temperature range of -55°C to 125°C. Check for RoHS compliance documentation if required by local regulations. Validate pin compatibility with existing PCB footprints before finalizing procurement.

Selection Notes

Select this component when a fast 3-to-8 decoder is needed with wide voltage flexibility between 2V and 6V. Consider its symmetrical output drive characteristics for balanced signal integrity. Evaluate the multiple enable inputs for complex cascading requirements. Compare propagation delays against system timing constraints at the target supply voltage. Assess noise immunity needs relative to the 28% VCC specification.

Part Context

This part belongs to the M74HC238 series of decoders. It is functionally compatible with the standard 74 series 238 logic family. The RM13 suffix specifically denotes the SOP-16 surface mount package configuration. It shares core electrical characteristics with other variants in the HC logic family while offering optimized speed and power dissipation metrics.

Replacement Considerations

Direct replacements include M74HC238B1R (DIP) and M74HC238TTR (TSSOP). Cross-manufacturer equivalents such as CD74HC238 or SN74HC238 are available but require verification of mechanical dimensions and exact electrical tolerances.