Part A
74HC74D
東芝セミコンダクター・アンド・ストレージ
- Lifecycle
- Active
- Stock
- 3058 個数
- Package
- SOIC-14
- Series
- ロジック - フリップフロップ
Replacement verdict
Not a drop-in replacement
The 74HC74D and 74HC7014D-Q100J are not functionally interchangeable. The 74HC74D is a dual D-type flip-flop with set and reset, while the 74HC7014D-Q100J is a hex inverting Schmitt trigger. They differ in logic function, channel count, input threshold behavior, and package pinout, so direct substitution is not possible without circuit redesign.
Different logic function
Different channel count
Different input threshold
Different pinout
Parts at a glance
Part B
74HC7014D-Q100J
ネクスペリアUSA株式会社
- Lifecycle
- Active
- Stock
- 9439 個数
- Package
- SOIC-14
- Series
- ロジック - バッファ、ドライバ、レシーバ、トランシーバ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74HC74D | 74HC7014D-Q100J | Why it matters |
|---|---|---|---|
| Logic Function | Dual D-type flip-flop with set and reset | Hex non-inverting Schmitt trigger buffer | The two devices perform fundamentally different logic functions, so they are not functionally interchangeable in a circuit. |
| Number of Channels | 2 | 6 | Channel count determines how many independent signal paths the device can handle in a design. |
| Output Type | Push-pull (standard CMOS) | Push-pull (standard CMOS) | Output drive style affects compatibility with downstream loads and bus configurations. |
| Input Type | Standard CMOS | Schmitt trigger | Schmitt trigger inputs provide hysteresis, improving noise immunity for slow or noisy signals, unlike standard CMOS inputs. |
| Supply Voltage Range | 2.0 V to 6.0 V | 2.0 V to 6.0 V | The supply voltage range must match the system rail to ensure proper operation and logic level compatibility. |
| Propagation Delay (typical) | ~14 ns at 5 V | ~13 ns at 5 V | Propagation delay influences maximum operating frequency and timing margins in synchronous designs. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range must cover the application environment to guarantee reliable performance. |
| Package | SO14 | SO14 | Package compatibility determines whether the part can be placed on the same PCB footprint. |
| Automotive Qualification | No | AEC-Q100 qualified | Automotive qualification indicates the device meets stricter reliability and quality standards required for automotive applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74HC74D | 74HC7014D-Q100J |
|---|---|---|
| Supplier | - | Nexperia USA Inc. |
| Series | 74HC | Automotive, AEC-Q100, 74HC |
| Part Status | Active | Active |
| Logic Type | - | Buffer, Non-Inverting |
| Number of Elements | 2 | 6 |
| Number of Bits per Element | 1 | 1 |
| Input Type | - | Schmitt Trigger |
| Output Type | Complementary | Push-Pull |
| Current - Output High Low | 5.2mA, 5.2mA | 5.2mA, 5.2mA |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Function | Set(Preset) and Reset | - |
| Type | D-Type | - |
| Clock Frequency | 67 MHz | - |
| Max Propagation Delay @ V Max CL | 26ns @ 6V, 50pF | - |
| Trigger Type | Positive Edge | - |
| Current - Quiescent (Iq) | 2 µA | - |
| Input Capacitance | 5 pF | - |
Frequently asked questions
What are the fundamental differences between the 74HC74D and the 74HC7014D-Q100J?
The 74HC74D is a dual D-type flip-flop with set and reset, featuring standard push-pull CMOS outputs. The 74HC7014D-Q100J is a hex inverting Schmitt trigger, not a flip-flop, and is qualified to the AEC-Q100 automotive standard. They are functionally unrelated logic devices.
Can the 74HC74D be used as a direct substitute for the 74HC7014D-Q100J?
No. The 74HC74D is a sequential logic flip-flop, while the 74HC7014D-Q100J is a combinational logic Schmitt-trigger inverter. Their logic functions, pinouts, and package configurations differ, so they are not interchangeable.
What is the logic function of the 74HC74D?
The 74HC74D contains two independent positive-edge-triggered D-type flip-flops with individual asynchronous set and reset inputs, and complementary Q and Q-bar outputs.
What is the logic function of the 74HC7014D-Q100J?
The 74HC7014D-Q100J contains six independent inverting Schmitt-trigger buffers, providing hysteresis for noise-immune signal conditioning of slow or noisy input waveforms.
Does the 74HC7014D-Q100J have automotive qualification?
Yes. The suffix Q100J indicates AEC-Q100 qualification, making the device suitable for automotive applications requiring enhanced reliability and temperature range compliance.
Are the supply voltage ranges of the 74HC74D and 74HC7014D-Q100J the same?
Both devices are members of the 74HC family and typically operate from 2.0 V to 6.0 V. However, always verify the exact recommended operating conditions in the respective manufacturer datasheets.
Do the 74HC74D and 74HC7014D-Q100J come in the same package type?
The 74HC74D is commonly supplied in a SO14 package, while the 74HC7014D-Q100J is typically supplied in a SO14 or TSSOP14 package depending on the manufacturer. Package compatibility must be confirmed against the specific datasheet.
Which device is better for debouncing a mechanical switch?
The 74HC7014D-Q100J is better suited for debouncing because its Schmitt-trigger inputs provide hysteresis, which cleanly squares up slow or noisy edges. The 74HC74D does not have Schmitt-trigger inputs.