7132LA55PDG Equivalent & Substitute Parts

Part Overview

The 7132LA55PDG is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation. This through-hole mounted memory IC operates with a 55 ns access time and is housed in a 48-PDIP package. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support, maintenance, and component procurement in legacy applications.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	Parallel
Access Time	55 ns
Write Cycle Time	55 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package	48-DIP (0.600", 15.24mm)

Substitute Part Grouping Explanation

Substitution eligibility for the 7132LA55PDG is determined by the following critical parameters:

Core Functional Requirements:

Memory capacity: 16Kbit (2K x 8 organization)
Memory type: Volatile SRAM with dual-port, asynchronous architecture
Memory interface: Parallel
Voltage supply range: 4.5V ~ 5.5V
Operating temperature range: 0°C ~ 70°C

Performance Compatibility:

Access time and write cycle time must be equal to or faster than 55 ns to maintain backward compatibility

Physical Compatibility Considerations:

Package type and mounting method may differ from the original 48-PDIP through-hole configuration
Substitute parts may utilize surface-mount technology (PLCC) or alternative DIP variants
Pin count and footprint differences require circuit board redesign or adapter solutions

The 7132LA20JG qualifies as a substitute based on identical memory capacity, organization, voltage supply range, and operating temperature specifications. The faster 20 ns access time provides performance improvement over the original 55 ns specification.

Parameter Comparison

Parameter	7132LA55PDG (Main Part)	7132LA20JG (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8
Memory Interface	Parallel	Parallel
Access Time	55 ns	20 ns
Write Cycle Time	55 ns	20 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Through Hole	Surface Mount
Package / Case	48-DIP (0.600", 15.24mm)	52-LCC (J-Lead)
Product Status	Obsolete	Active
RoHS Status	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Product Status Consideration: The 7132LA55PDG is classified as obsolete. The 7132LA20JG is an active product from the same manufacturer, ensuring continued availability and supply chain reliability for future procurement cycles.

Compliance and Certification: The 7132LA20JG carries ROHS3 compliance and REACH unaffected status, meeting modern environmental and regulatory requirements. The original 7132LA55PDG does not specify these certifications.

Performance Advantage: The 7132LA20JG provides a 35 ns improvement in access time and write cycle time (20 ns versus 55 ns), delivering enhanced performance while maintaining full backward compatibility with the original electrical specifications.

Physical Integration: The primary constraint in substitution is the package difference: 48-DIP through-hole versus 52-LCC surface-mount. Circuit board redesign or the use of adapter modules is required for direct replacement in legacy through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA20JG directly replace the 7132LA55PDG without circuit modifications?

A: Electrical substitution is valid; the 7132LA20JG meets all voltage, temperature, and memory organization requirements. However, physical substitution requires PCB redesign due to package differences (48-DIP through-hole versus 52-LCC surface-mount).

Q: Why is the access time faster in the substitute part?

A: The 7132LA20JG operates at 20 ns access time compared to the original 55 ns. Faster access time is a performance enhancement that maintains backward compatibility with systems designed for the slower specification.

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

A: The 7132LA55PDG is obsolete, indicating discontinued manufacturing and limited availability. The 7132LA20JG is active, ensuring reliable procurement and supply continuity for new designs and legacy system maintenance.

Q: Are there compliance differences between these parts?

A: The 7132LA20JG is ROHS3 compliant and REACH unaffected. The 7132LA55PDG does not specify these certifications. Modern applications requiring environmental compliance should use the 7132LA20JG.

Q: What does the package designation 52-LCC (J-Lead) mean?

A: LCC denotes Leadless Chip Carrier; J-Lead indicates J-shaped leads for surface mounting. This differs from the 48-DIP (Dual In-line Package) through-hole configuration of the original part.

Q: Is the 7132LA20JG suitable for legacy system repairs?

A: Yes, for electrical functionality. Physical integration requires either PCB modification to accommodate surface-mount technology or use of a through-hole adapter module to maintain the original mounting configuration.

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