Part A
74HC153D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 5590 PCS
- Package
- SOIC-20
- Series
- Logique - commutateurs de signaux, multiplexeurs, décodeurs
Replacement verdict
Not a drop-in replacement
The 74HC151D and 74HC153D are not functionally interchangeable despite sharing the same 74HC logic family and SOIC-16 package. The 74HC151D is a single 8-to-1 multiplexer, while the 74HC153D integrates two independent 4-to-1 multiplexers with separate strobe inputs, resulting in fundamentally different channel configurations, input counts, and control logic. Direct substitution is not possible without redesigning the surrounding circuit.
Different multiplexer configuration
Different channel count
Different select line structure
Different strobe arrangement
Parts at a glance
Part B
74HC151D
Toshiba Semiconductor et stockage
- Lifecycle
- Active
- Stock
- 3388 PCS
- Package
- SOIC-16
- Series
- Logique - commutateurs de signaux, multiplexeurs, décodeurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HC151D | 74HC153D | Why it matters |
|---|---|---|---|
| Function | Single 8-to-1 multiplexer | Dual 4-to-1 multiplexer | Defines the core logic function; the two devices are not functionally interchangeable because one selects 1 of 8 inputs while the other selects 1 of 4 inputs on each of two channels. |
| Number of Multiplexer Channels | 1 | 2 | Determines how many independent data selection paths are available in a single package, affecting board layout and channel count. |
| Number of Data Inputs | 8 | 4 per channel (8 total) | Affects the maximum number of signals that can be selected and the required select-line width. |
| Number of Select Inputs | 3 (A, B, C) | 2 per channel (S0, S1) | Determines the addressing complexity and how many control lines the host must drive. |
| Output Type | Complementary outputs (Y and W) | Single output per channel (Y) | Affects whether both true and inverted selected signals are available without additional logic. |
| Enable/Strobe Inputs | Active-low enable (E) | Active-low enable per channel (1G, 2G) | Determines how each device is gated or disabled, which affects cascading and power-saving strategies. |
| Supply Voltage Range | 2 V to 6 V | 2 V to 6 V | Defines compatible logic levels and power supply requirements for the target system. |
| Logic Family | 74HC CMOS | 74HC CMOS | Ensures similar input thresholds, noise margins, and drive characteristics when interfacing with other logic. |
| Package | SOIC-16 | SOIC-16 | Confirms physical footprint and pin count compatibility for PCB layout and assembly. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Ensures both parts can operate reliably in the same environmental conditions. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC153D | 74HC151D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Active | Active |
| Type | Multiplexer | Multiplexer |
| Circuit | 2 x 4:1 | 1 x 8:1 |
| Independent Circuits | 2 | 1 |
| Current - Output High Low | 5.2mA, 5.2mA | 5.2mA, 5.2mA |
| Voltage Supply Source | Single Supply | Single Supply |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the 74HC151D and the 74HC153D?
The 74HC151D is a single 8-to-1 multiplexer with one output and complementary outputs (Y and W). The 74HC153D contains two independent 4-to-1 multiplexers, each with its own output and shared select lines. The 74HC151D selects one of eight data inputs, while the 74HC153D selects one of four data inputs per multiplexer section.
Are the 74HC151D and 74HC153D pin-compatible?
No. The 74HC151D is typically supplied in a 16-pin package (SOIC-16), while the 74HC153D is also in a 16-pin package but with a different pinout. The 74HC151D uses pins for eight data inputs, three select inputs, enable, and two outputs. The 74HC153D uses pins for two sets of four data inputs, two common select inputs, two enable inputs, and two outputs. They are not direct drop-in replacements.
Can the 74HC151D be used to replace the 74HC153D in an existing design?
Not directly. The 74HC151D provides one 8-to-1 multiplexing function, whereas the 74HC153D provides two 4-to-1 multiplexing functions. Replacing one with the other requires logic redesign, including changes to select line decoding, enable control, and output routing. Verified datasheets from manufacturers such as Texas Instruments or Nexperia should be consulted before any substitution.
What are the select input configurations for each device?
The 74HC151D uses three select inputs (S0, S1, S2) to choose one of eight data channels. The 74HC153D uses two common select inputs (S0, S1) to choose one of four data channels for each of its two multiplexer sections. The 74HC153D also has separate enable inputs for each section, while the 74HC151D has a single active-low enable input.
Do both devices operate at the same supply voltage and logic levels?
Yes. Both the 74HC151D and 74HC153D are 74HC-series CMOS devices. They typically operate over a supply voltage range of 2.0 V to 6.0 V and provide standard CMOS logic levels compatible with other 74HC-series devices. Exact limits should be verified from the specific manufacturer datasheet.
Which device is better for expanding multiplexer channels?
The 74HC151D is suited for 8-to-1 multiplexing in a single package. The 74HC153D is suited for dual 4-to-1 multiplexing, which can be more efficient when two independent 4-channel selections are needed. For larger multiplexer trees, both devices can be cascaded, but the 74HC153D may reduce package count when two 4-to-1 functions are required.
Are the output drive characteristics the same for both devices?
Both devices are 74HC-series CMOS multiplexers and typically provide similar output drive currents, commonly specified as ±4 mA at 5 V for standard 74HC logic. However, exact output drive, propagation delay, and input capacitance should be confirmed from the manufacturer datasheet for the specific part number and package.
What package types are available for the 74HC151D and 74HC153D?
The suffix "D" in both part numbers typically indicates a SOIC-16 package from manufacturers such as Nexperia or Texas Instruments. Other package options may exist under different suffixes. Always verify the exact package code and mechanical dimensions from the manufacturer or authorized distributor before designing a PCB footprint.