Renesas Electronics 7132LA55CB SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7132LA55CB is a 16Kbit dual-port asynchronous SRAM with parallel interface, organized as 2K x 8 bits. This component operates at 55 ns access time and write cycle time, with supply voltage range of 4.5V to 5.5V and operating temperature range of -55°C to 125°C. The part is mounted through-hole in a 48-DIP package (0.600", 15.24mm) with side-brazed construction.

The 7132LA55CB is classified as obsolete. Locating equivalent or substitute components is necessary for system maintenance, legacy equipment repair, and design updates where continued sourcing of the original part is unavailable.

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	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C
Package Type	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the 7132LA55CB is determined by the following critical parameters:

Memory capacity (16Kbit) and organization (2K x 8)
Dual-port asynchronous SRAM technology
Parallel interface configuration
Supply voltage compatibility (4.5V ~ 5.5V)
Access time and write cycle time specifications
Package and mounting type compatibility

The substitute parts identified maintain the same base product number (7132LA) and core memory specifications. However, substitutes may differ in access time, operating temperature range, package type, mounting method, and product status. These differences must be evaluated against system requirements before implementation.

Parameter Comparison

Parameter	7132LA55CB (Main)	7132LA20JG (Substitute)	7132LA100CB (Substitute)
Memory Size	16Kbit	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8	2K x 8
Memory Format	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous	SRAM - Dual Port, Asynchronous
Memory Interface	Parallel	Parallel	Parallel
Access Time	55 ns	20 ns	100 ns
Write Cycle Time	55 ns	20 ns	100 ns
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C	0°C ~ 70°C	-55°C ~ 125°C
Package Type	48-DIP (0.600", 15.24mm)	52-LCC (J-Lead)	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole	Surface Mount	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

The 7132LA100CB is the most direct substitute for the 7132LA55CB. Both parts share identical package type (48-DIP), mounting method (through-hole), operating temperature range (-55°C to 125°C), and RoHS compliance status. The 7132LA100CB has a slower access time (100 ns versus 55 ns), which is acceptable in applications where timing margins permit the increased latency. This part is currently active in production.

The 7132LA20JG offers superior performance with 20 ns access time, faster than the original specification. However, this substitute requires design changes: it uses surface-mount technology in a 52-LCC package instead of through-hole 48-DIP, and operates within a narrower temperature range (0°C to 70°C). The 7132LA20JG is ROHS3 compliant. This part is suitable only for new designs or systems where PCB layout and thermal environment can accommodate surface-mount construction and the reduced temperature operating range.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7132LA55CB in existing circuit boards?

A: Yes, the 7132LA100CB is a direct physical and electrical replacement. Both use 48-DIP through-hole packages with identical pinouts and supply voltage requirements. The slower access time (100 ns versus 55 ns) must be verified against system timing requirements.

Q: Is the 7132LA20JG compatible with the original 7132LA55CB application?

A: The 7132LA20JG is electrically compatible but requires PCB redesign. It uses surface-mount 52-LCC packaging instead of through-hole 48-DIP. Additionally, its operating temperature range (0°C to 70°C) is narrower than the original (-55°C to 125°C). Evaluate system thermal and environmental requirements before selection.

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

A: Access time determines the delay between address input and valid data output. The 7132LA20JG (20 ns) is faster than the original (55 ns), while the 7132LA100CB (100 ns) is slower. Faster parts are backward-compatible in timing-critical applications. Slower parts require verification that system timing margins accommodate the increased latency.

Q: Are all substitute parts currently available?

A: The 7132LA20JG and 7132LA100CB are both active products with current inventory. The original 7132LA55CB is obsolete and no longer manufactured.

Q: What are the RoHS compliance implications?

A: The original 7132LA55CB is RoHS non-compliant. The 7132LA20JG is ROHS3 compliant. The 7132LA100CB maintains RoHS non-compliant status. For applications requiring RoHS compliance, only the 7132LA20JG meets this requirement, though it requires design changes for package and temperature range compatibility.

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