M74HC147RM13TR

Overview

The M74HC147RM13TR is a high-speed CMOS 10-to-4 line priority encoder fabricated with silicon gate C2MOS technology. It encodes nine active-low decimal data inputs into four active-low BCD outputs, encoding implied decimal zero when all inputs are high. The device operates within a wide voltage range of 2V to 6V and features symmetrical output impedance with |IOH| = IOL = 4mA (min). Propagation delay is typically 15ns at VCC = 6V, with balanced tPLH ≈ tPHL characteristics.

Feature Summary

• Encodes nine decimal data inputs into four-line BCD outputs using priority logic
• Features active-low inputs and outputs for direct interfacing
• Includes protection circuits against static discharge and transient excess voltage on all inputs

Applications

• Keyboard encoding systems
• Interrupt priority handling in microprocessor interfaces
• Data multiplexing applications requiring priority resolution

Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm package availability as the RM13TR suffix indicates SOP packaging. Check for qualified replacement parts from STMicroelectronics or other manufacturers that maintain pin compatibility and electrical specifications.

Selection Notes

Select this component for designs requiring 10-to-4 priority encoding with standard 74HC series compatibility. Ensure supply voltage remains between 2V and 6V. Consider propagation delays up to 38ns max at 6V for timing-critical paths. Verify noise immunity requirements align with the specified 28% VCC hysteresis levels.

Part Context

This part belongs to the M74HC147 family of priority encoders manufactured by STMicroelectronics. It utilizes advanced silicon gate C2MOS technology to achieve high speed and low power dissipation. The device is functionally compatible with industry-standard 74 series 147 logic functions.

Replacement Considerations

Direct replacements include M74HC147B1R (DIP) and M74HC147TTR (TSSOP) from STMicroelectronics. Cross-manufacturer equivalents such as SN74HC147 from Texas Instruments may be considered if pinout and electrical parameters match.