AT49F002N-70PI Equivalent & Substitute Parts

Part Overview

The AT49F002N-70PI is a 2Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-PDIP package with 70 ns access time. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across a -40°C to 85°C temperature range with 4.5V to 5.5V supply voltage requirements.

Key Parameters

Parameter	Value
Memory Size	2Mbit
Memory Organization	256K x 8
Memory Interface	Parallel
Access Time	70 ns
Voltage Supply Range	4.5V ~ 5.5V
Package Type	32-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Memory Type	Non-Volatile FLASH

Substitute Part Grouping Explanation

Substitution of the AT49F002N-70PI is determined by strict equivalence across the following critical parameters:

Memory capacity: 2Mbit (256K x 8 organization)
Interface type: Parallel
Access time: 70 ns maximum
Supply voltage: 4.5V ~ 5.5V compatibility
Package: 32-DIP form factor with 0.600" (15.24mm) body width
Mounting: Through-hole technology

The SST39SF020A-70-4C-PHE meets all electrical and mechanical substitution criteria for the AT49F002N-70PI. Both devices share identical memory capacity, organization, interface architecture, access time specification, voltage requirements, and physical packaging.

Parameter Comparison

Parameter	AT49F002N-70PI	SST39SF020A-70-4C-PHE	Compatibility
Memory Size	2Mbit	2Mbit	Equivalent
Memory Organization	256K x 8	256K x 8	Equivalent
Memory Interface	Parallel	Parallel	Equivalent
Access Time	70 ns	70 ns	Equivalent
Write Cycle Time	50µs	20µs	Substitute Superior
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	Equivalent
Package / Case	32-DIP (0.600", 15.24mm)	32-DIP (0.600", 15.24mm)	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Product Status	Obsolete	Active	Substitute Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute Compliant

Engineering Selection Recommendations

The SST39SF020A-70-4C-PHE is the direct functional equivalent for AT49F002N-70PI replacement. Selection of this substitute is supported by:

Identical electrical specifications across all critical parameters (memory capacity, organization, interface, access time, voltage)
Matching physical package and through-hole mounting compatibility
Active product status ensuring long-term availability and supply chain continuity
ROHS3 compliance, addressing regulatory requirements not met by the obsolete AT49F002N-70PI
Superior write cycle time performance (20µs versus 50µs), providing operational advantage

Frequently Asked Questions (FAQ)

Q: Can SST39SF020A-70-4C-PHE directly replace AT49F002N-70PI in existing designs?

A: Yes. Both devices share identical memory capacity (2Mbit), organization (256K x 8), parallel interface, 70 ns access time, 4.5V–5.5V supply voltage, and 32-DIP through-hole package. Pin-for-pin compatibility is maintained.

Q: What is the difference in write cycle time between these parts?

A: The SST39SF020A-70-4C-PHE has a 20µs write cycle time compared to 50µs for the AT49F002N-70PI. This represents improved write performance in the substitute part.

Q: Are there temperature range differences?

A: Yes. The AT49F002N-70PI operates from -40°C to 85°C, while the SST39SF020A-70-4C-PHE operates from 0°C to 70°C. Applications requiring extended low-temperature operation below 0°C must retain the original part or identify alternative solutions.

Q: What is the RoHS compliance status of each part?

A: The AT49F002N-70PI is RoHS non-compliant. The SST39SF020A-70-4C-PHE is ROHS3 compliant, meeting current environmental and regulatory standards.

Q: Are both parts available in the same packaging format?

A: Yes. Both devices are supplied in 32-PDIP (32-DIP) through-hole packages with 0.600" (15.24mm) body width, ensuring mechanical compatibility in PCB layouts.

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