AT49BV002NT-12VC Equivalent & Substitute Parts

Part Overview

The AT49BV002NT-12VC is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, organized as 256K x 8 with a 120 ns access time and 32-VSOP surface mount packaging. This device operates at 2.7V to 3.6V supply voltage across a 0°C to 70°C temperature range. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

AT49BV002NT-12VC

Microchip TechnologyIn Stock: 1143AT49BV002NT-12VC Datasheet

Current PartRFQ

SST39VF020-70-4C-WHE

Microchip TechnologyIn Stock: 3843SST39VF020-70-4C-WHE Datasheet

MFR RecommendedRFQ

SST39VF020-70-4I-WHE

Microchip TechnologyIn Stock: 17750SST39VF020-70-4I-WHE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT49BV002NT-12VC is based on the following critical parameters that must remain constant or improve:

• Memory capacity: 2Mbit (256K x 8 organization)
• Memory interface: Parallel
• Supply voltage range: 2.7V ~ 3.6V (compatible with original specification)
• Package type: 32-TFSOP surface mount with 0.488" width
• Mounting type: Surface mount

The substitute parts SST39VF020-70-4C-WHE and SST39VF020-70-4I-WHE meet these core requirements. Both are active products from Microchip Technology's SST39 MPF™ series, offering improved access time (70 ns versus 120 ns) and faster write cycle time (20µs versus 50µs). The primary difference between the two substitutes is the operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Both SST39VF020-70-4C-WHE and SST39VF020-70-4I-WHE are active products with ROHS3 compliance, addressing the obsolescence of the AT49BV002NT-12VC. The SST39VF020-70-4I-WHE offers an extended operating temperature range of -40°C to 85°C, making it suitable for applications requiring wider temperature operation. The SST39VF020-70-4C-WHE maintains the original 0°C to 70°C range and is appropriate for standard commercial temperature environments. Both substitutes provide performance improvements with faster access time and write cycle time while maintaining electrical compatibility through identical supply voltage specifications and parallel interface architecture.

Frequently Asked Questions (FAQ)

Q: Can SST39VF020-70-4C-WHE and SST39VF020-70-4I-WHE be used interchangeably with AT49BV002NT-12VC?

A: Yes, both substitutes are pin-compatible and functionally equivalent at the electrical level. The primary difference is operating temperature range. Selection depends on your application's temperature requirements.

Q: What is the difference between SST39VF020-70-4C-WHE and SST39VF020-70-4I-WHE?

A: Both parts are identical except for operating temperature range. SST39VF020-70-4C-WHE operates 0°C to 70°C (commercial grade), while SST39VF020-70-4I-WHE operates -40°C to 85°C (industrial grade).

Q: Are the substitute parts pin-compatible with the original AT49BV002NT-12VC?

A: Yes. Both substitutes use the same 32-TFSOP package with 0.488" width and surface mount configuration, ensuring direct PCB compatibility.

Q: Do the substitute parts meet RoHS compliance?

A: Yes. Both SST39VF020-70-4C-WHE and SST39VF020-70-4I-WHE are ROHS3 compliant, whereas the original AT49BV002NT-12VC is non-compliant.

Q: What are the performance improvements of the substitute parts?

A: The substitutes offer 70 ns access time (versus 120 ns) and 20µs write cycle time (versus 50µs), providing faster memory operations while maintaining full electrical compatibility.

Q: Do the substitute parts operate at the same supply voltage as the original?

A: Yes. All three parts operate at 2.7V to 3.6V supply voltage, ensuring direct electrical compatibility in existing designs.