Equivalent & Substitute Parts for 71V321SA55PF

Part Overview

The 71V321SA55PF 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 new design implementations. Substitute parts must maintain electrical compatibility across memory capacity, interface type, supply voltage, and package specifications while potentially offering improved performance characteristics or active 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 71V321SA55PF is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Memory Size: 16Kbit
Memory Organization: 2K x 8
Memory Format: SRAM (Volatile)
Technology: SRAM - Dual Port, Asynchronous
Memory Interface: Parallel
Voltage Supply Range: 3V ~ 3.6V
Operating Temperature Range: 0°C ~ 70°C
Package Type: 64-TQFP (14x14)
Mounting Type: Surface Mount

Performance Parameters (Substitution Allowed):

Access Time: Equal or faster (55 ns or lower)
Write Cycle Time: Equal or faster (55 ns or lower)

The 71V321L25PFG qualifies as a direct substitute by maintaining all mandatory electrical and mechanical parameters while providing improved access time performance (25 ns versus 55 ns). The substitute part transitions from obsolete to active product status and achieves RoHS3 compliance.

Parameter Comparison

Parameter	71V321SA55PF (Main)	71V321L25PFG (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 Range	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package Type	64-TQFP (14x14)	64-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The 71V321L25PFG is the qualified substitute for the 71V321SA55PF based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical memory capacity, organization, interface type, and supply voltage specifications. The substitute part operates within the same temperature range and maintains equivalent pin configuration in the 64-TQFP package.

Performance Enhancement: The 71V321L25PFG provides faster access time (25 ns) and write cycle time (25 ns) compared to the original part (55 ns). This performance improvement is backward compatible and does not introduce timing conflicts in systems designed for the original 55 ns specification.

Product Status and Compliance: The substitute part holds active product status, ensuring continued availability and manufacturing support. The transition to RoHS3 compliance addresses regulatory requirements for new designs and procurement cycles.

Packaging and Handling: Both parts share identical MSL ratings (3, 168 Hours) and surface mount package specifications, requiring no changes to assembly processes or storage procedures.

Frequently Asked Questions (FAQ)

Q: Can the 71V321L25PFG be used as a direct replacement for the 71V321SA55PF in existing designs?

A: Yes. The substitute part maintains all mandatory electrical and mechanical parameters. The faster access time (25 ns versus 55 ns) is backward compatible with systems designed for the original 55 ns specification.

Q: Are there differences in pin configuration between these parts?

A: No. Both parts use the 64-TQFP (14x14) package with identical pin assignments and electrical interface specifications.

Q: What is the impact of the RoHS3 compliance difference?

A: The 71V321L25PFG meets RoHS3 requirements, making it suitable for new designs and procurement in regulated markets. The original part's non-compliance status limits its use to legacy system support only.

Q: Do these parts require different handling or storage procedures?

A: No. Both parts share the same MSL rating of 3 (168 Hours), requiring identical moisture control and storage protocols.

Q: Is the 71V321L25PFG available in the same packaging format?

A: Yes. The substitute part is supplied in a Tray package format, maintaining the same 64-TQFP (14x14) surface mount configuration as the original part.

Q: What is the base product number relationship between these parts?

A: The main part uses base product number 71V321S, while the substitute uses base product number 71V321L. Both derive from the same Renesas 71V321 SRAM family.

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