MC10H165L

Overview

The MC10H165L is an 8-input priority encoder from the onsemi 10H series, packaged in a CDIP-16 ceramic dual-in-line format. It encodes eight active-high inputs into a binary-coded output representing the highest-priority input. The device features synchronous latching controlled by a clock signal and operates with a typical propagation delay of 2.2 ns. It utilizes MECL-compatible differential outputs and functions within a standard -5.2 V power supply range.

Feature Summary

• Encodes eight active-high inputs to a binary code corresponding to the highest-priority active input
• Provides synchronous operation via a clock-controlled latch mechanism
• Features voltage-compensated design for improved noise margin across operating conditions
• Maintains compatibility with the standard MECL 10K family while offering reduced propagation delay

Applications

• Decoding system status on a priority basis in control processors
• Peripheral controller logic for addressing ROMs or RAMs
• Testing systems requiring multiplexing data or random logic input encoding

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the L suffix denotes a ceramic DIP package. Confirm RoHS compliance requirements against the datasheet's availability of lead-free variants. Ensure the application environment supports the specified operating temperature range and electrical characteristics defined for the 10H series.

Selection Notes

Select this component when a high-speed priority encoder is needed for MECL-based logic designs. The device is suitable for applications requiring direct extension into larger encoder arrays through its Q3 output. Consider the CDIP-16 package constraints if surface-mount alternatives are not feasible for the target assembly process.

Part Context

This part belongs to the MC10H165 functional family, which includes plastic DIP and PLCC variants. The MC10H165L specifically refers to the ceramic dual-in-line package version. It serves as a functional duplication of the standard MECL 10K family part but provides significant improvements in propagation delay without increasing power-supply current consumption.

Replacement Considerations

The MC10H165L is functionally compatible with the standard MECL 10K family priority encoders. Verify pinout alignment and electrical specifications before substituting with other 10H series devices or legacy MECL 10K components.