Part A
74LVC04AD
NXP USA Inc.
- Lifecycle
- Active
- Stock
- 7520 PCS
- Package
- SOIC-14
- Series
- Logic - Gates and Inverters
Replacement verdict
Compatible functional replacement candidate
The 74LVC06ADR2G is a functionally compatible replacement candidate for the 74LVC04AD in most inverter applications, provided the open-drain output configuration is acceptable and external pull-up resistors are added. Both devices share the same 14-pin SOIC footprint and LVC logic family characteristics, but the 74LVC06ADR2G requires pull-up resistors for proper logic-high output, which the 74LVC04AD does not. Designers must validate pull-up resistor values against their specific timing and load requirements before substituting.
Logic Function
High match
Package Type
High match
Output Type
Validation required
External Pull-up Requirement
Validation required
Parts at a glance
Part B
74LVC06ADR2G
onsemi
- Lifecycle
- Active
- Stock
- 3500 PCS
- Series
- Logic - Gates and Inverters
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 | 74LVC06ADR2G | Why it matters |
|---|---|---|---|
| Logic Function | Hex Inverter | Hex Inverter with Open-Drain Outputs | Determines the output drive type; open-drain outputs require external pull-up resistors and cannot source current, affecting direct substitutability. |
| Output Type | Push-Pull (Totem-Pole) | Open-Drain | Push-pull outputs actively drive both high and low, while open-drain outputs only pull low, so the two are not functionally interchangeable without circuit changes. |
| Output Drive Current (IOL) | 24 mA | 32 mA | Affects the ability to sink current when driving loads; a higher IOL allows driving heavier loads or lower-resistance pull-ups. |
| Output Drive Current (IOH) | -24 mA | N/A (open-drain, no source current) | Open-drain devices cannot source current, so any load requiring active high drive cannot be supported by the 74LVC06ADR2G. |
| Propagation Delay (tPD) | 4.5 ns (typical at 3.3 V) | 4.5 ns (typical at 3.3 V) | Timing performance affects signal integrity and maximum operating frequency; similar delays ease timing compatibility. |
| Supply Voltage Range (VCC) | 1.65 V to 3.6 V | 1.65 V to 3.6 V | Defines the compatible logic levels and power supply requirements for the target application. |
| Operating Temperature Range | -40 °C to +125 °C | -55 °C to +125 °C | Determines suitability for automotive, industrial, or extended-temperature environments. |
| Package / Mounting | SOIC-14 (Surface Mount) | SOIC-14 (Surface Mount) | Physical footprint and mounting style must match the PCB layout for a drop-in replacement. |
| Number of Circuits | 6 | 6 | Matching channel count ensures the same number of signal paths can be handled. |
| Input Type | Standard CMOS | Standard CMOS | Input threshold and compatibility with upstream logic families must be consistent for reliable interfacing. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74LVC04AD | 74LVC06ADR2G |
|---|---|---|
| Supplier | - | onsemi |
| Series | 74LVC | 74LVC |
| Part Status | Active | Obsolete |
| Logic Type | Inverter | Inverter |
| Number of Circuits | 6 | 6 |
| Number of Inputs | 1 | 1 |
| Features | - | Open Drain |
| Voltage - Supply | 1.65V ~ 3.6V | 1.2V ~ 5.5V |
| Current - Quiescent (Max) | 40 µA | 40 µA |
| Current - Output High Low | 24mA, 24mA | -, 32mA |
| Max Propagation Delay @ V Max CL | 6ns @ 3.3V, 50pF | 6ns @ 5V, 50pF |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Logic Level - Low | 0.12V ~ 0.8V | - |
| Logic Level - High | 1.08V ~ 2V | - |
Frequently asked questions
What are the main functional differences between the 74LVC04AD and the 74LVC06ADR2G?
The 74LVC04AD is a hex inverting gate with standard push-pull CMOS outputs, while the 74LVC06ADR2G is a hex inverter with open-drain outputs. The 74LVC06ADR2G requires an external pull-up resistor to define the high logic level and supports wired-OR/AND configurations, whereas the 74LVC04AD drives both high and low levels directly.
Are the 74LVC04AD and 74LVC06ADR2G pin-to-pin compatible?
Both devices are offered in the SOIC-14 package and share the same standard 14-pin hex inverter pinout: pins 1, 3, 5, 9, 11, and 13 are inputs; pins 2, 4, 6, 8, 10, and 12 are outputs; pin 7 is GND; pin 14 is VCC. However, because the 74LVC06ADR2G has open-drain outputs, the output stage topology differs internally, so functional compatibility depends on the external pull-up network.
What is the recommended operating voltage range for these devices?
Both the 74LVC04AD and 74LVC06ADR2G are specified for a supply voltage range of 1.65 V to 3.6 V, with 3.6 V being the absolute maximum VCC rating. They are not intended for 5 V supply operation, although inputs are tolerant to 5 V when VCC is within the recommended range.
Can the 74LVC06ADR2G be used to drive a bus or wired-OR configuration?
Yes. The open-drain outputs of the 74LVC06ADR2G allow multiple outputs to be tied together with a single pull-up resistor to implement a wired-OR or wired-AND function. The 74LVC04AD cannot be used in this manner because its push-pull outputs would contend if tied together.
What are the output drive capabilities of the 74LVC04AD and 74LVC06ADR2G?
The 74LVC04AD provides symmetrical push-pull output drive of ±24 mA at VCC = 3.0 V. The 74LVC06ADR2G has an open-drain output that sinks current to ground; its low-level output current capability is typically 32 mA at VOL = 0.4 V and VCC = 3.0 V. The high-level current is determined by the external pull-up resistor and the connected load.
Do both devices support 5 V input tolerance?
Yes. Both the 74LVC04AD and 74LVC06ADR2G feature 5 V tolerant inputs when operated at VCC between 1.65 V and 3.6 V, allowing them to interface with 5 V logic without additional level shifting on the input side.
What are the operating temperature ranges for these components?
Both the 74LVC04AD and 74LVC06ADR2G are specified for the industrial temperature range of −40 °C to +125 °C, making them suitable for a wide range of industrial and automotive-adjacent applications.
Which device is better for level shifting from 3.3 V to 5 V?
The 74LVC06ADR2G is often preferred for 3.3 V to 5 V level shifting because its open-drain output can be pulled up to 5 V, provided the pull-up voltage does not exceed the device's absolute maximum output voltage rating. The 74LVC04AD push-pull output should not be pulled above VCC, so it is not suitable for direct 3.3 V to 5 V upward level shifting without additional circuitry.
Are the 74LVC04AD and 74LVC06ADR2G available in the same package options?
The 74LVC04AD is commonly available in SOIC-14, TSSOP-14, and other packages depending on the manufacturer. The 74LVC06ADR2G is specifically supplied in the SOIC-14 package, as indicated by the "D" suffix and "R2G" tape-and-reel designation from onsemi. Package availability may vary by manufacturer and distributor, so the exact orderable part number should be verified against the manufacturer datasheet.