Part A
74LVC04AD
NXP USA Inc.
- Lifecycle
- Active
- Stock
- 7520 Stückzahl
- Package
- SOIC-14
- Series
- Logic-Gates und Wechselrichter
Replacement verdict
Not a drop-in replacement
The 74LVC04AD and 74LVC2244AD,118 are not functionally interchangeable. The 74LVC04AD is a hex inverting gate, while the 74LVC2244AD,118 is an octal non-inverting buffer with 3-state outputs. They differ in logic function, channel count, output type, and pin configuration, making direct substitution impossible without circuit redesign.
Different logic function
Different channel count
Different output type
Different pin configuration
Parts at a glance
Part B
74LVC2244AD,118
Nexperia USA Inc.
- Lifecycle
- Active
- Stock
- 3319 Stückzahl
- Package
- SOIC-20
- Series
- Logic c Puffer, Treiber, Empfänger, Transceiver
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74LVC04AD | 74LVC2244AD,118 | Why it matters |
|---|---|---|---|
| Logic Function | Hex inverter (6 independent inverters) | Octal buffer/line driver with 3-state outputs (dual 4-bit, non-inverting) | The fundamental logic function differs; an inverter cannot directly replace a non-inverting buffer/line driver in a circuit. |
| Number of Channels | 6 | 8 | Channel count affects how many signal lines can be handled by a single device. |
| Output Type | Push-pull (totem-pole) | 3-state (tri-state) | 3-state outputs allow bus sharing and high-impedance disconnection, which push-pull outputs cannot provide. |
| Logic Polarity | Inverting | Non-inverting | Polarity determines whether the output is the logical complement of the input, directly affecting circuit behavior. |
| Output Drive Current (IOH/IOL) | ±24 mA | ±24 mA | Drive current determines the ability to source or sink current to connected loads; both match here, but the functional difference remains decisive. |
| Supply Voltage Range | 1.65 V to 3.6 V | 1.65 V to 3.6 V | Operating voltage range must match the system supply to ensure proper logic levels and compatibility. |
| Propagation Delay (tpd) | ~4.5 ns at 3.3 V | ~5.5 ns at 3.3 V | Propagation delay affects timing margins in synchronous and high-speed signal paths. |
| Package Type | SO-14 (14-pin small outline) | SO-20 (20-pin small outline) | Different pin counts and package footprints prevent direct PCB drop-in replacement. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature range must cover the application environment for reliable operation. |
| Pin Count | 14 | 20 | Pin count mismatch means the devices are not pin-compatible and cannot be substituted without layout changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74LVC04AD | 74LVC2244AD,118 |
|---|---|---|
| Supplier | - | Nexperia USA Inc.,Rochester Electronics, LLC |
| Series | 74LVC | 74LVC |
| Part Status | Active | Active |
| Logic Type | Inverter | Buffer, Non-Inverting |
| Number of Elements | - | 2 |
| Number of Bits per Element | - | 4 |
| Output Type | - | 3-State |
| Current - Output High Low | 24mA, 24mA | 12mA, 12mA |
| Voltage - Supply | 1.65V ~ 3.6V | 1.2V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Circuits | 6 | - |
| Number of Inputs | 1 | - |
| Current - Quiescent (Max) | 40 µA | - |
| Logic Level - Low | 0.12V ~ 0.8V | - |
| Logic Level - High | 1.08V ~ 2V | - |
| Max Propagation Delay @ V Max CL | 6ns @ 3.3V, 50pF | - |
Frequently asked questions
Are the 74LVC04AD and 74LVC2244AD,118 functionally interchangeable?
No. The 74LVC04AD is a hex inverting gate (six independent inverters), while the 74LVC2244AD,118 is an octal non-inverting buffer/line driver with 3-state outputs. They differ in logic function, channel count, and output type, so they are not direct substitutes.
What are the logic functions of the 74LVC04AD and 74LVC2244AD,118?
The 74LVC04AD provides six independent inverter gates, each producing an output that is the logical inverse of its input. The 74LVC2244AD,118 provides eight non-inverting buffer channels with 3-state outputs, controlled by two active-low output enable pins.
How do the output drive capabilities of the 74LVC04AD and 74LVC2244AD,118 compare?
Both devices are LVC-family parts typically specified with ±24 mA output drive at 3.0 V, but the 74LVC2244AD,118 includes series damping resistors on its outputs to reduce line reflections, whereas the 74LVC04AD does not. Designers should confirm the exact drive and termination requirements against the respective manufacturer datasheets.
Do the 74LVC04AD and 74LVC2244AD,118 operate at the same supply voltage range?
Yes. Both are LVC-family devices and are specified for a nominal supply voltage range of 1.65 V to 3.6 V, with 2.5 V and 3.3 V being common operating points. Always verify the exact recommended operating conditions in the manufacturer datasheet for the specific orderable part number.
What package options are available for the 74LVC04AD and 74LVC2244AD,118?
The 74LVC04AD is commonly offered in SO14 and TSSOP14 packages, while the 74LVC2244AD,118 is typically supplied in SO20 and TSSOP20 packages. Package footprint and pin count differ, so PCB layout compatibility must be checked before substitution.
Can the 74LVC04AD be used to replace the 74LVC2244AD,118 in an existing design?
No. The 74LVC04AD has six inverting channels without 3-state control, while the 74LVC2244AD,118 has eight non-inverting channels with 3-state outputs and output damping resistors. Pin count, pinout, logic polarity, and enable functionality are all different, so a direct replacement is not possible.
Are the 74LVC04AD and 74LVC2244AD,118 compatible with 5 V tolerant inputs?
LVC-family devices are generally specified with 5 V tolerant inputs when operated within the recommended supply range, allowing interfacing with 5 V logic. However, the exact input voltage tolerance should be confirmed from the manufacturer datasheet for each specific part number before use in a design.