Part A
74HC153D
Toshiba Semiconductor và lưu trữ
- Lifecycle
- Active
- Stock
- 5590 PCS
- Package
- SOIC-20
- Series
- Logic - Signal Switches, Multiplexers, Decoders
Replacement verdict
Compatible functional replacement candidate
The 74HC157D and 74HC153D are both quad 2-input multiplexers in the same SOIC-16 package and 74HC logic family, sharing identical supply voltage, input, and output characteristics. However, the 74HC157D provides four independent 2-to-1 multiplexers with a common select line, while the 74HC153D contains two 4-to-1 multiplexers with separate select inputs, so pin function and channel configuration differ. The 74HC157D can serve as a functional substitute only when the 4-to-1 selection capability of the 74HC153D is not required; otherwise, circuit redesign is necessary.
Logic Family
High match
Package Type
High match
Multiplexer Configuration
Validation required
Pin Assignment
Not compatible
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HC157D | 74HC153D | Why it matters |
|---|---|---|---|
| Function | Quad 2-input multiplexer | Dual 4-input multiplexer | Defines the core logic function; these are not functionally interchangeable because the number of inputs and channels differ. |
| Number of Multiplexer Channels | 4 | 2 | Determines how many independent signals can be selected; affects board layout and channel count requirements. |
| Inputs per Channel | 2 | 4 | Specifies the selection depth; a 4-input mux can select among more sources than a 2-input mux. |
| Select Inputs | 1 common select | 2 select inputs (one per channel) | Affects control logic complexity and whether channels can be selected independently. |
| Output Type | Non-inverting | Non-inverting | Both provide non-inverted outputs, so polarity is compatible, but channel structure still differs. |
| Enable/Strobe Input | Active-low enable | Active-low enable per channel | Enable control affects power-up behavior and how outputs are gated in a system. |
| Package | SOIC-16 | SOIC-16 | Same package footprint allows physical compatibility, but electrical function must still match. |
| Supply Voltage Range | 2 V to 6 V | 2 V to 6 V | Both support standard HC-family logic levels, so supply compatibility is generally equivalent. |
| Propagation Delay | Typically ~14 ns at 4.5 V | Typically ~14 ns at 4.5 V | Similar timing performance means speed is not the limiting factor for substitution. |
| Logic Family | 74HC | 74HC | Same logic family ensures compatible input thresholds and output drive characteristics. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC153D | 74HC157D |
|---|---|---|
| Series | 74HC | 74HC |
| Part Status | Active | Active |
| Type | Multiplexer | Multiplexer |
| Circuit | 2 x 4:1 | 4 x 2:1 |
| 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 ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the 74HC157D and the 74HC153D?
The 74HC157D is a quad 2-input multiplexer that selects one of two 4-bit data sources based on a common select input and provides non-inverting outputs. The 74HC153D is a dual 4-input multiplexer that selects one of four data inputs for each of its two independent 4-input multiplexer sections, with separate select inputs for each section and both inverting and non-inverting outputs available.
Are the 74HC157D and 74HC153D pin-compatible?
No. The 74HC157D is typically housed in a 16-pin package with a pinout designed for quad 2-input multiplexing, while the 74HC153D is also in a 16-pin package but has a different pinout to accommodate dual 4-input multiplexing with separate select and enable inputs. They are not pin-to-pin replacements.
Can the 74HC157D be used as a direct substitute for the 74HC153D in an existing design?
No. The two devices have different logic functions, pinouts, and control input structures. The 74HC157D selects between two 4-bit inputs, whereas the 74HC153D selects between four inputs for each of two independent multiplexer sections. A direct substitution would require redesign of the surrounding circuitry and is not functionally equivalent.
What are the supply voltage and logic family characteristics of both devices?
Both the 74HC157D and 74HC153D are members of the 74HC high-speed CMOS logic family. They typically operate over a supply voltage range of 2.0 V to 6.0 V, with standard HC-family input and output characteristics, including CMOS-compatible input thresholds and rail-to-rail output swing.
How many select inputs does each device have?
The 74HC157D has one common select input (S) that controls all four 2-input multiplexer sections simultaneously. The 74HC153D has two separate select input pairs (S0 and S1 for each of the two 4-input multiplexer sections), allowing independent selection for each section.
Do both devices provide enable or strobe inputs?
Yes. The 74HC157D includes a common enable/strobe input (E) that enables or disables all outputs simultaneously. The 74HC153D includes separate enable/strobe inputs for each of its two multiplexer sections, allowing independent enabling or disabling of each section.
What are the output configurations of the 74HC157D and 74HC153D?
The 74HC157D provides non-inverting outputs for all four multiplexer sections. The 74HC153D provides both inverting and non-inverting outputs for each of its two multiplexer sections, offering greater output flexibility.
Which device is more suitable for expanding multiplexer capacity?
The 74HC153D is more suitable for expanding multiplexer capacity because each of its two sections can select from four inputs, effectively providing 4:1 multiplexing per section. The 74HC157D provides only 2:1 multiplexing per section. For larger multiplexer trees, the 74HC153D reduces the number of stages required compared to the 74HC157D.