Part A
74ACT125SCX
Onsemi
- Lifecycle
- Active
- Stock
- 6699 Stückzahl
- Package
- SOIC-14
- Series
- Logic c Puffer, Treiber, Empfänger, Transceiver
Replacement verdict
Not a drop-in replacement
The 74ACT125SCX and 74ACT11286N are functionally unrelated devices and cannot serve as substitutes for one another. The 74ACT125SCX is a quad bus buffer with 3-state outputs, while the 74ACT11286N is a 9-bit parity generator/checker. Their logic functions, pin configurations, and I/O characteristics differ fundamentally, making direct replacement impossible without complete circuit redesign.
Different logic function
Different pin configuration
Different output type
Different channel count
Parts at a glance
Part B
74ACT11286N
Texas Instruments
- Lifecycle
- Active
- Stock
- 4482 Stückzahl
- Package
- DIP-14
- Series
- Logic-Paritätsgeneratoren und -prüfer
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74ACT125SCX | 74ACT11286N | Why it matters |
|---|---|---|---|
| Logic Function | Quad Buffer with 3-State Outputs | 9-Bit Parity Generator/Checker | The two devices perform fundamentally different logic functions, so they are not functionally substitutable in a circuit. |
| Number of Channels / Bits | 4 | 9 | Channel/bit count determines how many signal lines the device can process, affecting bus width compatibility. |
| Output Type | 3-State | Push-Pull | 3-state outputs allow bus sharing and high-impedance isolation, while push-pull outputs cannot be tied together on a shared bus. |
| Package / Mounting Type | SOIC-14, Surface Mount | PDIP-14, Through-Hole | Different package and mounting styles require different PCB footprints and assembly processes, preventing direct drop-in replacement. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Both operate over the standard 5 V ACT logic range, so supply compatibility is not a differentiator. |
| Logic Family | ACT (Advanced CMOS with TTL-compatible inputs) | ACT (Advanced CMOS with TTL-compatible inputs) | Same logic family means similar input thresholds, drive strength, and noise margins, aiding electrical compatibility. |
| Propagation Delay (typical) | Approximately 6 ns at 5 V | Approximately 10 ns at 5 V | Propagation delay affects timing margins in synchronous systems; a slower device may violate setup/hold requirements. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both support industrial temperature ranges, so thermal environment compatibility is equivalent. |
| Pin Count | 14 | 14 | Same pin count, but pin functions differ entirely, so pin-to-pin compatibility does not exist. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74ACT125SCX | 74ACT11286N |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Series | 74ACT | 74ACT |
| Part Status | Obsolete | Obsolete |
| Logic Type | Buffer, Non-Inverting | Parity Generator/Checker |
| Number of Circuits | - | 9-Bit |
| Current - Output High Low | 24mA, 24mA | 24mA, 24mA |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5 V ~ 5.5 V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Through Hole |
| Number of Elements | 4 | - |
| Number of Bits per Element | 1 | - |
| Output Type | 3-State | - |
Frequently asked questions
What are the basic functions of the 74ACT125SCX and 74ACT11286N?
The 74ACT125SCX is a quad buffer with 3-state outputs, while the 74ACT11286N is a 9-bit parity generator/checker. They serve different logic functions and are not functionally equivalent.
Can the 74ACT125SCX and 74ACT11286N be used interchangeably?
No. The 74ACT125SCX provides four independent non-inverting buffers with 3-state outputs, whereas the 74ACT11286N generates and checks parity for 9-bit data. Their pinouts, logic functions, and applications differ, so they cannot be directly substituted.
What are the package types for the 74ACT125SCX and 74ACT11286N?
The 74ACT125SCX is typically offered in a 14-pin SOIC package. The 74ACT11286N is typically offered in a 14-pin PDIP package. Package options may vary by manufacturer, so always verify the specific datasheet.
Do both devices operate at the same supply voltage and logic levels?
Yes. Both are members of the ACT logic family and are specified for a nominal 5 V supply with TTL-compatible input thresholds. However, confirm the exact recommended operating conditions in the respective manufacturer datasheets.
What is the difference in output drive capability between the 74ACT125SCX and 74ACT11286N?
The 74ACT125SCX is specified with standard ACT-family output drive, typically ±24 mA at 5 V. The 74ACT11286N also provides standard ACT-family drive, typically ±24 mA at 5 V. Both should be evaluated against the specific datasheet for guaranteed limits.
Are the 74ACT125SCX and 74ACT11286N pin-compatible?
No. The 74ACT125SCX has a 14-pin buffer pinout with enable and 3-state control pins, while the 74ACT11286N has a 14-pin parity generator/checker pinout with even/odd and enable inputs. Their pin functions and assignments are different.
Which applications are suitable for the 74ACT125SCX versus the 74ACT11286N?
The 74ACT125SCX is used for bus buffering, signal isolation, and driving 3-state lines. The 74ACT11286N is used for error detection in digital data transmission, memory systems, and arithmetic units where parity checking is required.
Do both devices have the same operating temperature range?
Both are typically specified for the industrial temperature range of –40 °C to +85 °C, but this can vary by manufacturer and grade. Always confirm the exact temperature range from the official datasheet for the specific part number.