Equivalent & Substitute Parts for 71V321L35J

Part Overview

The 71V321L35J is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation, packaged in a 52-PLCC (19.13x19.13mm) surface-mount configuration. This component operates at 3V to 3.6V supply voltage with a 35 ns access time and write cycle time, supporting 2K x 8 memory organization with parallel interface architecture.

The 71V321L35J carries an obsolete product status. Locating equivalent or substitute components becomes necessary for legacy system maintenance, repair operations, and continued production support where original inventory is depleted or unavailable.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Type	Volatile SRAM
Technology	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel
Access Time	35 ns
Write Cycle Time	35 ns
Voltage Supply Range	3V to 3.6V
Operating Temperature	0°C to 70°C
Package Type	52-PLCC (J-Lead)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the 71V321L35J is determined by strict alignment across the following critical parameters:

Memory capacity and organization (16Kbit, 2K x 8 configuration)
Memory technology (dual-port asynchronous SRAM)
Parallel interface architecture
Package type and physical dimensions (52-PLCC, 19.13x19.13mm)
Supply voltage compatibility (3V to 3.6V range)
Operating temperature range (0°C to 70°C)

The 71V321L25JG qualifies as a direct substitute based on identical memory capacity, organization, technology, interface, package, voltage, and temperature specifications. The primary distinction is improved access time and write cycle time performance (25 ns versus 35 ns), which represents a performance upgrade rather than a functional incompatibility.

Parameter Comparison

Parameter	71V321L35J (Main Part)	71V321L25JG (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8
Memory Type	Volatile SRAM	Volatile SRAM
Technology	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel	Parallel
Access Time	35 ns	25 ns
Write Cycle Time	35 ns	25 ns
Voltage Supply Range	3V to 3.6V	3V to 3.6V
Operating Temperature	0°C to 70°C	0°C to 70°C
Package Type	52-PLCC (J-Lead)	52-PLCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The 71V321L25JG is the qualified substitute for the obsolete 71V321L35J. Selection of the 71V321L25JG is supported by the following factors:

Identical memory capacity, organization, and dual-port asynchronous SRAM architecture
Identical package footprint and surface-mount configuration, enabling direct PCB compatibility
Identical supply voltage and operating temperature specifications
Improved access time and write cycle time (25 ns versus 35 ns), providing performance headroom
Active product status with current manufacturing availability
ROHS3 compliance status, meeting modern environmental and regulatory requirements

The 71V321L25JG operates within the same electrical and thermal envelope as the 71V321L35J, with faster memory access characteristics that do not introduce functional incompatibility in legacy system designs.

Frequently Asked Questions (FAQ)

Q: Can the 71V321L25JG be used as a direct replacement for the 71V321L35J?

A: Yes. Both components share identical memory capacity (16Kbit), organization (2K x 8), dual-port asynchronous SRAM technology, parallel interface, 52-PLCC package dimensions, supply voltage range (3V to 3.6V), and operating temperature range (0°C to 70°C). The 71V321L25JG features faster access and write cycle times (25 ns), which is a performance improvement and does not create functional incompatibility.

Q: Are there physical or mechanical differences between these parts?

A: No. Both components use identical 52-PLCC (J-Lead) packaging with 19.13x19.13mm dimensions and surface-mount configuration. PCB footprints and mounting requirements are identical.

Q: What is the significance of the access time difference?

A: The 71V321L25JG provides 25 ns access time compared to the 71V321L35J's 35 ns. This represents faster memory response. In systems designed for 35 ns operation, the faster 25 ns component operates within specification and introduces no timing violations.

Q: Does RoHS compliance affect substitution?

A: The 71V321L25JG is ROHS3 compliant, while the 71V321L35J is non-compliant. For new designs or systems requiring RoHS compliance, the 71V321L25JG satisfies regulatory requirements. For legacy system repair using the original non-compliant specification, both components are functionally equivalent.

Q: Are supply voltage and temperature ranges identical?

A: Yes. Both components operate across 3V to 3.6V supply voltage and 0°C to 70°C operating temperature range. No voltage regulation or thermal management adjustments are required when substituting.

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