AT49BV002N-12VC Equivalent & Substitute Parts

Part Overview

The AT49BV002N-12VC is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, packaged in 32-VSOP with 120 ns access time. This device is classified as obsolete, making substitute parts necessary for new designs and ongoing production support. The part operates at 2.7V to 3.6V supply voltage with a commercial temperature range of 0°C to 70°C.

Key Parameters

Parameter	AT49BV002N-12VC
Memory Size	2Mbit
Memory Organization	256K x 8
Memory Interface	Parallel
Access Time	120 ns
Write Cycle Time	50 µs
Voltage Supply	2.7V ~ 3.6V
Operating Temperature	0°C ~ 70°C
Package	32-TFSOP (0.488", 12.40mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the AT49BV002N-12VC is determined by the following critical parameters:

Memory capacity (2Mbit) and organization (256K x 8)
Parallel interface architecture
Physical package compatibility (32-TFSOP, 0.488" width)
Access time performance (120 ns or faster)
Supply voltage compatibility

The SST39SF020A series from Microchip Technology provides direct functional equivalents. All substitute parts maintain identical memory capacity, organization, and parallel interface. The SST39SF020A devices are available with 55 ns and 70 ns access times, both faster than the original 120 ns specification, ensuring backward compatibility. However, substitute parts operate at 4.5V to 5.5V supply voltage, which differs from the original 2.7V to 3.6V specification. This voltage difference requires circuit-level evaluation for compatibility.

Parameter Comparison

Parameter	AT49BV002N-12VC	SST39SF020A-55-4C-WHE	SST39SF020A-55-4I-WHE	SST39SF020A-70-4C-WHE	SST39SF020A-70-4I-WHE
Memory Size	2Mbit	2Mbit	2Mbit	2Mbit	2Mbit
Memory Organization	256K x 8	256K x 8	256K x 8	256K x 8	256K x 8
Memory Interface	Parallel	Parallel	Parallel	Parallel	Parallel
Access Time	120 ns	55 ns	55 ns	70 ns	70 ns
Write Cycle Time	50 µs	20 µs	20 µs	20 µs	20 µs
Voltage Supply	2.7V ~ 3.6V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package	32-TFSOP	32-TFSOP	32-TFSOP	32-TFSOP	32-TFSOP
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All SST39SF020A variants are active products with ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete AT49BV002N-12VC.

For applications requiring commercial temperature operation (0°C to 70°C), select SST39SF020A-55-4C-WHE or SST39SF020A-70-4C-WHE. The 55 ns variant provides superior access time performance; the 70 ns variant offers cost optimization while maintaining faster performance than the original part.

For applications requiring extended temperature operation (-40°C to 85°C), select SST39SF020A-55-4I-WHE or SST39SF020A-70-4I-WHE.

Packaging selection depends on assembly requirements: Tray packaging (-C suffix) for manual or selective assembly; Tape & Reel packaging (-T suffix) for automated pick-and-place operations.

The primary design consideration is supply voltage compatibility. The original AT49BV002N-12VC operates at 2.7V to 3.6V, while all SST39SF020A substitutes require 4.5V to 5.5V. Circuit redesign or voltage regulation modifications may be necessary.

Frequently Asked Questions (FAQ)

Q: Can SST39SF020A parts directly replace AT49BV002N-12VC in existing designs?

A: Physical and functional compatibility exists for memory capacity, organization, interface type, and package. However, the supply voltage difference (2.7V–3.6V vs. 4.5V–5.5V) requires circuit evaluation. If the original design operates at 5V, substitution is feasible. If the original design operates at 3.3V or lower, voltage regulation or circuit modification is required.

Q: What is the difference between 55 ns and 70 ns access time variants?

A: Both variants are faster than the original 120 ns specification. The 55 ns variant (SST39SF020A-55) provides maximum performance margin; the 70 ns variant (SST39SF020A-70) provides cost optimization. Selection depends on timing requirements of the host system.

Q: What packaging options are available?

A: SST39SF020A parts are supplied in Tray (-C) or Tape & Reel (-T) packaging. Tray packaging is suitable for manual assembly and low-volume production. Tape & Reel packaging is required for automated assembly equipment.

Q: Are there temperature-rated variants?

A: Yes. Commercial temperature variants (0°C to 70°C, -C and -70 suffixes) are available. Industrial temperature variants (-40°C to 85°C, -I suffix) are available for extended operating range applications.

Q: What is the inventory status of substitute parts?

A: SST39SF020A-55-4I-WHE has 3400 units in stock. SST39SF020A-55-4I-WHE-T has 3200 units. SST39SF020A-70-4I-WHE has 1004 units. SST39SF020A-70-4I-WHE-T has 809 units. SST39SF020A-55-4C-WHE has 2680 units. SST39SF020A-55-4C-WHE-T has 1135 units. SST39SF020A-70-4C-WHE has 3129 units. SST39SF020A-70-4C-WHE-T has 743 units.

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