NE556V Equivalent & Substitute Parts

Part Overview

The NE556V is a dual timer/oscillator integrated circuit manufactured by Texas Instruments, classified as a 555-type timing device. This component operates at a maximum frequency of 100kHz and is housed in a 14-pin DIP package suitable for through-hole mounting applications. The NE556V is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where legacy component compatibility is required.

Substiute Parts

NE556V

Texas InstrumentsIn Stock: 897NE556V Datasheet

Current PartRFQ

NE556N

STMicroelectronicsIn Stock: 30933NE556N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NE556V is determined by the following critical parameters:

Functional Compatibility: Both the main part and substitute must be 555-type dual timer/oscillator devices, ensuring functional equivalence in timing and oscillation applications.

Package Compatibility: The 14-DIP (0.300", 7.62mm) package format is mandatory for direct board-level substitution without layout modifications.

Electrical Parameters: Supply voltage range (4.5V ~ 16V) and supply current (20 mA) must be met or exceeded by the substitute part to ensure proper circuit operation.

Operating Temperature Range: The substitute must support the 0°C ~ 70°C operating temperature range or a broader range encompassing these limits.

Frequency Capability: The substitute frequency rating must equal or exceed the 100kHz maximum frequency of the NE556V to maintain timing accuracy in applications.

The NE556N from STMicroelectronics qualifies as a parametric equivalent based on these criteria, with the additional advantage of higher frequency capability (500kHz) and improved RoHS3 compliance status.

Parameter Comparison

Engineering Selection Recommendations

The NE556N from STMicroelectronics is a direct parametric substitute for the NE556V. Both devices share identical supply voltage ranges, current specifications, operating temperature limits, and package configurations. The NE556N provides superior frequency capability at 500kHz compared to the NE556V's 100kHz rating, ensuring compatibility with applications requiring the original 100kHz specification.

From a compliance perspective, the NE556N offers ROHS3 compliance status, addressing environmental and regulatory requirements that may be mandated in modern manufacturing and procurement standards. The NE556V's RoHS non-compliant status may present procurement challenges in regulated industries.

Both components are classified as obsolete, indicating limited future availability. Selection between these parts should prioritize compliance requirements and long-term supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the NE556N directly replace the NE556V without circuit modifications?

A: Yes. The NE556N is a parametric equivalent with identical pin configuration, supply voltage range (4.5V ~ 16V), supply current (20 mA), operating temperature range (0°C ~ 70°C), and 14-DIP package format. Direct substitution on existing PCBs is supported.

Q: What is the significance of the higher 500kHz frequency rating on the NE556N compared to the NE556V's 100kHz?

A: The NE556N's 500kHz capability exceeds the NE556V's 100kHz specification, ensuring full compatibility with applications designed for the original part. The higher frequency rating does not impose additional requirements on circuits designed for lower frequencies.

Q: Does the ROHS3 compliance of the NE556N affect compatibility with the NE556V?

A: No. ROHS3 compliance is an environmental and regulatory attribute that does not alter electrical or mechanical compatibility. The NE556N's improved compliance status may be advantageous for procurement in regulated markets.

Q: Are there any package or pinout differences between the NE556V and NE556N?

A: No. Both devices use the 14-DIP (0.300", 7.62mm) through-hole package with identical pinouts, enabling direct board-level substitution.

Q: What should be considered when sourcing these obsolete components?

A: Both the NE556V and NE556N are classified as obsolete products. Inventory availability may be limited. Verification of supplier stock status and component condition (new original vs. used/refurbished) is recommended prior to procurement decisions.