Equivalent & Substitute Parts for 71V321LA55PF8

Part Overview

The 71V321LA55PF8 is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 64-TQFP surface mount package. This part features a 55 ns access time and parallel memory interface with 2K x 8 organization. The device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and procurement planning. Substitute parts must maintain electrical compatibility across memory capacity, interface type, voltage supply range, and thermal operating conditions while accommodating differences in access time performance and product status.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Format	SRAM
Technology	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel
Access Time	55 ns
Voltage Supply Range	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C
Package Type	64-TQFP (14x14)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 71V321LA55PF8 is determined by strict equivalence across the following parameters:

Memory capacity: 16Kbit (non-negotiable)
Memory organization: 2K x 8 (non-negotiable)
Memory technology: SRAM - Dual Port, Asynchronous (non-negotiable)
Memory interface: Parallel (non-negotiable)
Package: 64-TQFP (14x14) surface mount (non-negotiable)
Voltage supply: 3V ~ 3.6V (non-negotiable)
Operating temperature: 0°C ~ 70°C (non-negotiable)

Access time may vary between the main part and substitutes, provided the substitute meets or exceeds the performance requirement. The 71V321L25PFG8 qualifies as a direct substitute, offering improved access time (25 ns versus 55 ns) while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Parameter	71V321LA55PF8 (Main)	71V321L25PFG8 (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8
Memory Format	SRAM	SRAM
Technology	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel	Parallel
Access Time	55 ns	25 ns
Write Cycle Time	55 ns	25 ns
Voltage Supply	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package / Case	64-LQFP	64-LQFP
Supplier Device Package	64-TQFP (14x14)	64-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The 71V321L25PFG8 is the qualified substitute for the 71V321LA55PF8. Selection of this substitute provides the following advantages:

Active product status ensures long-term availability and supply chain continuity
ROHS3 compliance satisfies modern environmental and regulatory requirements
Improved access time (25 ns) provides performance headroom beyond the original 55 ns specification
Identical electrical and mechanical specifications ensure direct functional replacement
Tape & Reel packaging supports automated assembly processes

The substitute maintains full compatibility with existing circuit designs and PCB layouts. No design modifications are required for implementation.

Frequently Asked Questions (FAQ)

Q: Can the 71V321L25PFG8 be used as a direct replacement for the 71V321LA55PF8?

A: Yes. The 71V321L25PFG8 is electrically and mechanically compatible. Both devices share identical memory capacity (16Kbit), organization (2K x 8), interface type (parallel), voltage supply range (3V ~ 3.6V), operating temperature range (0°C ~ 70°C), and package configuration (64-TQFP). The substitute offers faster access time (25 ns versus 55 ns), which is a performance improvement.

Q: What are the key differences between these parts?

A: The primary differences are access time (25 ns versus 55 ns), product status (active versus obsolete), RoHS compliance (ROHS3 compliant versus non-compliant), and packaging format (Tape & Reel versus standard packaging). All other electrical and mechanical parameters are identical.

Q: Are there any design considerations when switching to the 71V321L25PFG8?

A: No design modifications are required. The faster access time of the substitute is backward compatible with systems designed for the original 55 ns part. Pin configuration, voltage requirements, and thermal characteristics remain unchanged.

Q: What is the significance of the product status difference?

A: The 71V321LA55PF8 is classified as obsolete, indicating discontinued manufacturing and limited availability. The 71V321L25PFG8 maintains active status, ensuring reliable procurement and supply chain support for current and future production requirements.

Q: Does the RoHS compliance difference affect compatibility?

A: No functional compatibility impact exists. ROHS3 compliance of the substitute indicates adherence to current environmental standards and regulatory requirements, which is advantageous for new designs and long-term system support.

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