54ALS162BJ/B

Overview

The 54ALS162BJ/B is a synchronous 4-bit decade counter manufactured by Rochester Electronics, LLC. It belongs to the 54ALS logic family and features a binary-coded decimal (BCD) counting sequence from 0 to 9. The device includes synchronous parallel load capability, allowing data to be loaded into the four flip-flops on the active clock edge when the load input is asserted. It provides complementary outputs for each bit position and includes ripple clock inputs for cascading multiple counters without external gating.

Feature Summary

• Synchronous operation ensures all internal flip-flops change state simultaneously with the clock signal, eliminating ripple delay issues associated with asynchronous counters.
• Decade counting functionality restricts the count sequence to ten states (0-9), automatically resetting to zero after reaching the maximum value without requiring external decoding logic.
• Parallel data loading allows direct entry of specific values into the counter registers via dedicated input pins, controlled by an active-low load enable signal.

Applications

• Digital timing circuits requiring precise decade-based interval generation
• Cascaded frequency division networks in digital systems
• Binary-coded decimal display drivers for numeric readouts

Procurement Notes

Verify component authenticity through manufacturer documentation or authorized distribution channels. Confirm package integrity and pin alignment upon receipt. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet. Validate electrical parameters against original specifications before integration into critical systems.

Selection Notes

Select this component for applications requiring synchronous BCD counting with minimal propagation delay. Consider the 54ALS family characteristics regarding power consumption and speed trade-offs. Ensure voltage levels and interface requirements match the system design constraints. Verify availability of compatible packaging options for the target PCB layout.

Part Context

Rochester Electronics specializes in sourcing and manufacturing obsolete and hard-to-find semiconductor components. The 54ALS162BJ/B represents a continuation of legacy Texas Instruments designs, ensuring compatibility with existing systems that require discontinued parts. This product supports maintenance and repair operations for industrial and military equipment utilizing vintage logic families.

Replacement Considerations

Compatible substitutes include the SN54ALS162 and SN74ALS162 from Texas Instruments. Verify pinout compatibility and electrical specifications before substitution. Ensure functional equivalence in synchronous operation and decade counting behavior.