DM74ALS251SJX

Overview

The DM74ALS251SJX is a 3-state 1-of-8 line data selector/multiplexer manufactured by onsemi. It features full on-chip decoding to select one of eight data sources based on a three-bit binary code at the Select inputs. The device provides two complementary outputs for inverting and non-inverting buffer operation, controlled by an Output Control input that enables high impedance states. It utilizes an advanced oxide-isolated, ion-implanted Schottky TTL process. The 'X' suffix indicates tape and reel packaging. Recommended operating conditions include a supply voltage range of 4.5V to 5.5V and an operating temperature range of 0°C to +70°C.

Feature Summary

• Provides full on-chip decoding to select one of eight data sources using a unique three-bit binary code at the Select inputs.
• Features two complementary outputs offering both inverting and non-inverting buffer operation capabilities.
• Incorporates internal overlap features in Select input buffers to prevent invalid output transients during input changes.
• Output control circuitry includes a power-up 3-STATE feature to ensure safe initialization.

Applications

• Data routing and selection in digital systems
• Bus access management with high impedance state control
• Signal multiplexing requiring complementary outputs

Procurement Notes

Verify the specific package type required, as the SJ designation corresponds to the 16-Lead Small Outline Package (SOP). Confirm the 'X' suffix requirement for tape and reel delivery format. Check current availability status as this component may be subject to lifecycle changes or discontinuation notices from the manufacturer. Ensure compatibility with existing PCB footprints for the SOP-16 form factor.

Selection Notes

Select this component when a single-ended 8-to-1 multiplexer with complementary outputs is needed. It is suitable for applications requiring pin and functional compatibility with the LS family counterpart while benefiting from improved switching performance. Consider the ALS series characteristics for speed and power consumption balance within standard TTL logic families.

Part Context

This part belongs to the DM74ALS251 series of 3-state 1-of-8 line data selectors/multiplexers. It is part of the Advanced Low-power Schottky (ALS) logic family, which offers improved switching performance over standard LS devices. The device is designed for general-purpose digital applications requiring reliable data selection and bus driving capabilities.

Replacement Considerations

The datasheet notes pin and functional compatibility with the LS family counterpart. Verify if other manufacturers offer equivalent 74ALS251 parts in SOP-16 packages with tape and reel options. Ensure electrical specifications match requirements for propagation delay and drive current.