Renesas Electronics 71342LA55PF8 SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 71342LA55PF8 is a 32Kbit dual-port asynchronous SRAM memory IC in 64-TQFP surface mount packaging. This component features a 55 ns access time and parallel memory interface with 4K x 8 organization. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across memory capacity, interface type, packaging, and supply voltage specifications.

Key Parameters

Parameter	Value
Memory Size	32Kbit
Memory Organization	4K x 8
Memory Format	SRAM
Technology	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel
Package / Case	64-LQFP
Supplier Device Package	64-TQFP (14x14)
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution compatibility for the 71342LA55PF8 is determined by the following critical parameters:

Memory Capacity & Organization: Substitute parts must provide identical 32Kbit capacity with 4K x 8 organization to ensure address and data line compatibility
Memory Technology: Dual-port asynchronous SRAM architecture must be maintained for functional equivalence
Parallel Interface: Memory interface type must remain parallel to preserve system-level signal compatibility
Package Specification: 64-TQFP (14x14) surface mount package ensures mechanical and electrical pin compatibility
Supply Voltage Range: 4.5V ~ 5.5V operating range must be supported for power distribution compatibility
Operating Temperature: 0°C ~ 70°C range must be maintained for thermal environment compatibility
Moisture Sensitivity: MSL 3 classification ensures equivalent handling and storage requirements

The 71342LA20PFG8 meets all substitution criteria while offering improved performance characteristics and active product status.

Parameter Comparison

Parameter	71342LA55PF8 (Main Part)	71342LA20PFG8 (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	32Kbit	32Kbit
Memory Organization	4K x 8	4K x 8
Memory Format	SRAM	SRAM
Technology	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel	Parallel
Access Time	55 ns	20 ns
Write Cycle Time - Word, Page	55 ns	20 ns
Package / Case	64-LQFP	64-LQFP
Supplier Device Package	64-TQFP (14x14)	64-TQFP (14x14)
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Mounting Type	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The 71342LA20PFG8 is the direct substitute for the 71342LA55PF8. Selection of the substitute part is supported by the following factors:

Product Status: The 71342LA55PF8 is classified as obsolete, while the 71342LA20PFG8 maintains active product status, ensuring long-term availability and manufacturing support
Regulatory Compliance: The 71342LA20PFG8 is ROHS3 compliant, whereas the main part is RoHS non-compliant, providing enhanced environmental and regulatory alignment
Performance Enhancement: The 71342LA20PFG8 delivers 20 ns access and write cycle times compared to 55 ns in the main part, representing a 2.75x performance improvement while maintaining full electrical and mechanical compatibility
Packaging Format: The 71342LA20PFG8 is supplied in Tape & Reel format, supporting automated assembly processes and reducing component handling costs

Frequently Asked Questions (FAQ)

Q: Can the 71342LA20PFG8 be used as a direct replacement for the 71342LA55PF8 in existing designs?

A: Yes. Both parts share identical memory capacity (32Kbit), organization (4K x 8), technology (dual-port asynchronous SRAM), parallel interface, 64-TQFP packaging, supply voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). The substitute part is electrically and mechanically compatible for direct substitution.

Q: What are the differences between these two parts?

A: The primary differences are access time (20 ns versus 55 ns), product status (active versus obsolete), RoHS compliance (ROHS3 compliant versus non-compliant), and packaging format (Tape & Reel versus bulk). The 71342LA20PFG8 offers superior performance and regulatory compliance.

Q: Are there any timing considerations when substituting the 71342LA20PFG8 for the 71342LA55PF8?

A: The 71342LA20PFG8 has faster access and write cycle times (20 ns) than the original part (55 ns). Faster memory timing is backward compatible with designs specified for the slower part and will not cause functional issues.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both parts are classified as MSL 3 (168 Hours), requiring identical handling, storage, and reflow procedures.

Q: Is the Tape & Reel packaging of the 71342LA20PFG8 compatible with existing assembly processes?

A: Tape & Reel packaging is the standard format for automated surface mount assembly. If the original design used bulk packaging, conversion to Tape & Reel format is standard practice and compatible with modern manufacturing processes.

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