Part A
74LVC04AD
NXP USA Inc.
- Lifecycle
- Active
- Stock
- 7520 PCS
- Package
- SOIC-14
- Series
- Logique - portes et Onduleurs
Replacement verdict
Not a drop-in replacement
The 74LVC04AD and 74LVC4245AD,118 are not functionally interchangeable. The 74LVC04AD is a hex inverting gate operating on a single supply, while the 74LVC4245AD,118 is an octal dual-supply bus transceiver with 3-state outputs and directional control. They differ in logic function, channel count, supply architecture, and pinout, so direct substitution is not possible without redesign.
Different logic function
Different channel count
Different supply architecture
Different pinout
Parts at a glance
Part B
74LVC4245AD,118
Nexperia USA Inc.
- Lifecycle
- Active
- Stock
- 7428 PCS
- Package
- SOIC-24
- Series
- Logique - traducteur, convertisseur de niveau
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 | 74LVC4245AD,118 | Why it matters |
|---|---|---|---|
| Logic Function | Hex Inverter | Octal Dual-Supply Translating Transceiver | Defines the core function; these devices are not functionally interchangeable. |
| Number of Channels | 6 | 8 | Channel count affects how many signals can be processed simultaneously. |
| Supply Voltage Range | 1.65 V to 5.5 V | 1.5 V to 5.5 V (VCCA), 1.5 V to 3.6 V (VCCB) | Determines compatibility with system power rails and logic levels. |
| Dual Supply | No | Yes | Dual supply enables voltage level translation between two different logic domains. |
| Direction Control | Unidirectional | Bidirectional with direction pin | Bidirectional capability with direction control is essential for bus-oriented applications. |
| Output Type | Push-pull | 3-state | 3-state outputs allow bus sharing; push-pull is simpler but cannot be tri-stated. |
| Propagation Delay | ~4.5 ns at 3.3 V | ~5.5 ns at 3.3 V | Affects maximum operating frequency and timing margins in synchronous systems. |
| Package | SO-14 | SO-24 | Package footprint and pin count must match the PCB layout for direct substitution. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Ensures reliable operation across the intended environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74LVC04AD | 74LVC4245AD,118 |
|---|---|---|
| Series | 74LVC | 74LVC |
| Part Status | Active | Obsolete |
| Translator Type | - | Voltage Level |
| Channel Type | - | Bidirectional |
| Number of Circuits | 6 | 1 |
| Channelsper Circuit | - | 8 |
| Voltage - VCCA | - | 1.5 V ~ 5.5 V |
| Voltage - VCCB | - | 1.5 V ~ 3.6 V |
| Output Type | - | Tri-State, Non-Inverted |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Logic Type | Inverter | - |
| Number of Inputs | 1 | - |
| Voltage - Supply | 1.65V ~ 3.6V | - |
| Current - Quiescent (Max) | 40 µA | - |
| Current - Output High Low | 24mA, 24mA | - |
| 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
What are the primary functional differences between the 74LVC04AD and the 74LVC4245AD,118?
The 74LVC04AD is a hex inverting buffer (six independent inverters) with a single supply voltage range of 1.65 V to 5.5 V. The 74LVC4245AD,118 is an octal dual-supply translating transceiver with 3-state outputs, designed for bidirectional level shifting between a 3.3 V port and a 5 V port.
Can the 74LVC04AD and 74LVC4245AD,118 be used interchangeably in a design?
No. They differ in logic function, channel count, directionality, supply architecture, and pinout. The 74LVC04AD provides six fixed inverters, while the 74LVC4245AD,118 provides eight bidirectional transceivers with dual supply rails and direction control.
What supply voltage ranges are specified for each device?
The 74LVC04AD operates from a single supply of 1.65 V to 5.5 V. The 74LVC4245AD,118 uses dual supplies: VCC(A) for the 3.3 V port and VCC(B) for the 5 V port, with recommended operating ranges typically 1.5 V to 3.6 V for VCC(A) and 1.5 V to 5.5 V for VCC(B), per manufacturer datasheets.
Does the 74LVC4245AD,118 provide voltage translation that the 74LVC04AD does not?
Yes. The 74LVC4245AD,118 is specifically designed for dual-supply voltage translation between 3.3 V and 5 V logic levels. The 74LVC04AD is a single-supply device and does not provide dual-rail level shifting.
What are the output configurations of each device?
The 74LVC04AD has six inverting outputs without 3-state capability. The 74LVC4245AD,118 has eight transceiver outputs with 3-state control, allowing high-impedance states for bus-oriented applications.
Do both devices support the same operating temperature range?
Both the 74LVC04AD and 74LVC4245AD,118 are typically specified for the industrial temperature range of -40 °C to +125 °C, as stated in their respective manufacturer datasheets.
Are the package types for the 74LVC04AD and 74LVC4245AD,118 compatible?
No. The 74LVC04AD is commonly offered in packages such as SO-14 or TSSOP-14, while the 74LVC4245AD,118 is typically supplied in a 24-pin package such as SO-24 or TSSOP-24. Pin counts and footprints differ, preventing direct PCB substitution.
Which device is suitable for bidirectional bus applications?
The 74LVC4245AD,118 is suitable for bidirectional bus applications due to its octal transceiver configuration, direction control pin, and 3-state outputs. The 74LVC04AD is not intended for bidirectional bus interfacing.