74HCT154BQ,115

Signal Switches, Multiplexers, Decoders Overview

The Nexperia 74HCT154BQ,115 is a 4-to-16 line decoder/demultiplexer in the 74HCT logic family. It decodes four binary weighted address inputs (A0 to A3) into sixteen mutually exclusive active LOW outputs (Y0 to Y15). The device features two active LOW enable inputs (E0 and E1); a HIGH level on either input forces all outputs HIGH. It operates within a supply voltage range of 4.5 V to 5.5 V and accepts TTL-level inputs. Packaged in a DHVQFN24 (SOT815-1) leadless thermal enhanced very thin quad flat package with dimensions of 3.5 x 5.5 x 0.85 mm, it supports an ambient temperature range from -40 °C to +125 °C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Decodes four binary-coded address inputs into sixteen mutually exclusive active LOW outputs
• Features dual active LOW enable inputs that force outputs HIGH when asserted
• Accepts TTL-level input signals for direct interface with Transistor-Transistor Logic systems
• Includes input clamp diodes allowing current limiting resistors for voltages exceeding VCC

Signal Switches, Multiplexers, Decoders Applications

• 1-of-16 decoding applications requiring mutually exclusive output selection
• 1-to-16 demultiplexing using one enable input as the multiplexed data input
• Memory address decoding in digital systems operating at 5 V logic levels
• Industrial control systems requiring wide temperature operation up to 125 °C

Signal Switches, Multiplexers, Decoders Procurement Notes

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Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL-compatible input thresholds are required alongside CMOS low power dissipation. The DHVQFN24 package provides a compact footprint suitable for space-constrained PCB layouts. Ensure the design accommodates the specified 4.5 V to 5.5 V supply voltage range and utilizes the available enable inputs for proper chip control.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74HCT154 series, which includes variants such as the 74HC154BQ,115 and other package options like SO24 and TSSOP24. The HCT designation specifically indicates compatibility with standard TTL logic levels, distinguishing it from the HC variant which uses CMOS levels. All variants share the same core 4-to-16 decoding functionality but differ in electrical characteristics and physical packaging.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct functional substitutes include the 74HC154BQ,115 for CMOS-level applications or other 74HCT154 packages such as the 74HCT154D (SO24) and 74HCT154PW (TSSOP24), provided pinout compatibility and voltage requirements align.