Part A
74VHC595MX
Fairchild Halbleiter
- Lifecycle
- Active
- Stock
- 3740 Stückzahl
- Package
- SOIC-16
- Series
- Logic-Shift-Register
Replacement verdict
Not a drop-in replacement
The 74VHC595MX and 74VHC08D-Q100J are fundamentally different logic devices and cannot be used interchangeably. The 74VHC595MX is an 8-bit serial-in/parallel-out shift register with output latches and tri-state outputs, while the 74VHC08D-Q100J is a quad 2-input AND gate. Their core functions, pin configurations, and logic operations are entirely incompatible, making direct substitution impossible without complete circuit redesign.
Different logic function
Different output type
Different pin configuration
Different channel count
Parts at a glance
Part B
74VHC08D-Q100J
Nexperia USA Inc.
- Lifecycle
- Active
- Stock
- 4874 Stückzahl
- Series
- Logic-Gates und Wechselrichter
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 74VHC595MX | 74VHC08D-Q100J | Why it matters |
|---|---|---|---|
| Logic Function | 8-bit serial-in/serial-out or parallel-out shift register with output latches | Quad 2-input AND gate | The core logic function determines whether the devices are functionally interchangeable; these two parts perform completely different operations. |
| Number of Pins | 16 | 14 | Pin count affects PCB footprint and package compatibility; different pin counts cannot be dropped into the same socket. |
| Package / Case | SOIC-16 | SOIC-14 | Package type and body size must match the board layout for physical substitutability. |
| Supply Voltage Range | 2.0 V to 5.5 V | 2.0 V to 5.5 V | Both devices operate over the same VHC supply range, so system voltage compatibility is equivalent. |
| Logic Family | VHC (Very High Speed CMOS) | VHC (Very High Speed CMOS) | Same logic family implies similar switching thresholds, drive strength, and noise margins. |
| Output Drive Current | ±8 mA | ±8 mA | Output drive capability affects fan-out and ability to drive downstream loads; both provide comparable drive. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | The wider automotive-qualified temperature range of the AND gate suits harsher environments than the shift register. |
| Automotive Qualification | Not AEC-Q100 qualified | AEC-Q100 qualified | AEC-Q100 qualification is required for automotive applications and indicates enhanced reliability screening. |
| Propagation Delay (typical) | ~6.5 ns at 5 V | ~5.5 ns at 5 V | Propagation delay influences maximum operating frequency and timing margins in synchronous designs. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, so assembly process compatibility is equivalent. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 74VHC595MX | 74VHC08D-Q100J |
|---|---|---|
| Supplier | - | Nexperia USA Inc. |
| Series | 74VHC | Automotive, AEC-Q100, 74VHC |
| Part Status | Active | Active |
| Logic Type | Shift Register | AND Gate |
| Number of Circuits | - | 4 |
| Number of Inputs | - | 2 |
| Voltage - Supply | 2V ~ 5.5V | 2V ~ 5.5V |
| Current - Quiescent (Max) | - | 2 µA |
| Current - Output High Low | - | 8mA, 8mA |
| Logic Level - Low | - | 0.5V ~ 1.65V |
| Logic Level - High | - | 1.5V ~ 3.85V |
| Max Propagation Delay @ V Max CL | - | 7.9ns @ 5V, 50pF |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Tri-State | - |
| Number of Elements | 1 | - |
| Number of Bits per Element | 8 | - |
| Function | Serial to Parallel, Serial | - |
Frequently asked questions
Are the 74VHC595MX and 74VHC08D-Q100J functionally interchangeable?
No. The 74VHC595MX is an 8-bit serial-in/parallel-out shift register with output latches and 3-state outputs, while the 74VHC08D-Q100J contains four independent 2-input AND gates. Their logic functions, pinouts, and internal architectures are fundamentally different, so they cannot be used as substitutes for one another.
What are the primary logic functions of each device?
The 74VHC595MX is an 8-bit shift register with a storage register and 3-state parallel outputs, used for serial-to-parallel data conversion. The 74VHC08D-Q100J is a quad 2-input AND gate that produces a HIGH output only when both inputs are HIGH.
Do both parts operate from the same supply voltage range?
Yes. Both the 74VHC595MX and 74VHC08D-Q100J are VHC-family devices specified for a 2.0 V to 5.5 V supply voltage range, with typical operation at 3.3 V or 5 V.
How do the package types differ between the two parts?
The 74VHC595MX is supplied in a 16-pin SOIC package, while the 74VHC08D-Q100J is supplied in a 14-pin SOIC package. The different pin counts and pinouts prevent PCB footprint or socket interchangeability.
What is the significance of the Q100 suffix on the 74VHC08D-Q100J?
The Q100 suffix indicates that the 74VHC08D-Q100J is qualified to the AEC-Q100 standard for automotive-grade integrated circuits, meaning it meets stricter reliability and temperature requirements than standard commercial-grade logic devices.
Can the 74VHC595MX be used to drive the inputs of the 74VHC08D-Q100J?
Yes, provided both devices operate within the same VHC-family logic levels and supply voltage. The 74VHC595MX parallel outputs can drive the 74VHC08D-Q100J gate inputs as long as current, fanout, and voltage-level specifications in the respective datasheets are respected.
Do both devices support the same operating temperature range?
Not necessarily. The 74VHC08D-Q100J is AEC-Q100 qualified and typically specified over the automotive temperature range of -40 °C to +125 °C. The 74VHC595MX is a standard commercial-grade device typically specified over -40 °C to +85 °C. The exact temperature ratings should be confirmed from the respective manufacturer datasheets.
Are both parts available in tape and reel packaging?
Yes. Both the 74VHC595MX and 74VHC08D-Q100J are commonly offered in tape and reel packaging suitable for automated surface-mount assembly, though reel size and quantity per reel may differ between the two products.