74ACT11257DBR

Signal Switches, Multiplexers, Decoders Overview

The SN74ACT11257DBR is a quadruple 2-line to 1-line data selector/multiplexer with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features TTL-voltage compatible inputs and provides high-drive outputs capable of sourcing and sinking up to 24 mA. Propagation delays are specified with maximum values of 8.7 ns for data paths and 9.6 ns for output enable/disable transitions at 5.5 V.

Signal Switches, Multiplexers, Decoders Feature Summary

• TTL-voltage compatible inputs allow direct interfacing with standard logic systems
• Three-state outputs interface directly with system buses without loading data lines when disabled
• Flow-through architecture optimizes printed circuit board layout efficiency
• Center-pin VCC and GND configurations minimize high-speed switching noise

Signal Switches, Multiplexers, Decoders Applications

• Bus interface connections between multiple signal sources in high-performance systems
• Multiplexing signals from 4-bit data sources to four output data lines
• Data routing in bus-organized digital architectures

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'DBR' corresponds to the Shrink Small-Outline (SSOP) package type containing 20 pins. Confirm the component status is listed as Active for new designs. Ensure the datasheet revision matches the required electrical specifications, particularly regarding propagation delay limits and power dissipation ratings under your specific load conditions.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quadruple multiplexer with three-state outputs is required for 5 V logic systems. The ACT series offers faster switching speeds compared to standard AC or HC families while maintaining CMOS low power consumption. Verify that the SSOP package dimensions fit the available PCB footprint and that the thermal dissipation requirements are met by the design environment.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT logic family, utilizing Enhanced-Performance Implanted CMOS (EPIC) technology. It is functionally equivalent to other variants in the 74ACT11257 series but differs in physical packaging. The DBR suffix specifically denotes the shrink small-outline package configuration intended for surface-mount assembly applications requiring compact form factors.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct pin-compatible substitutes include the 74ACT11257DW and 74ACT11257PW variants. These alternatives share identical logical functionality and electrical characteristics but utilize different physical packages such as SOIC or TSSOP. Verify package compatibility before substitution.