Renesas Electronics 7132LA55P SRAM 16Kbit Parallel Memory - Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7132LA55P is a 16Kbit dual-port asynchronous SRAM memory IC in 48-DIP packaging with 55 ns access time. This component is classified as obsolete, making equivalent and substitute parts necessary for system maintenance, redesign, and production continuity. The part operates within a 4.5V to 5.5V supply voltage range and supports parallel memory interface architecture typical of legacy embedded systems and industrial 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
Package Type	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 7132LA55P is determined by strict equivalence across the following critical parameters:

Memory Architecture Requirements:

Memory type must be volatile SRAM
Technology must be dual-port, asynchronous
Memory size must be 16Kbit
Memory organization must be 2K x 8
Memory interface must be parallel

Electrical Compatibility:

Voltage supply range must encompass or match 4.5V ~ 5.5V
Access time and write cycle time must be equal to or faster than 55 ns

Physical Compatibility:

Package type must be 48-DIP with 0.600" (15.24mm) body dimensions
Mounting type must be through-hole

Base Product Number:

All substitutes must share the base product number 7132LA

The 7132LA100CB qualifies as a direct substitute based on these criteria, despite differences in product status, operating temperature range, and packaging format (tube vs. standard).

Parameter Comparison

Parameter	7132LA55P (Main Part)	7132LA100CB (Substitute)	Compatibility
Memory Type	Volatile SRAM	Volatile SRAM	Match
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous	Match
Memory Size	16Kbit	16Kbit	Match
Memory Organization	2K x 8	2K x 8	Match
Memory Interface	Parallel	Parallel	Match
Access Time	55 ns	100 ns	Substitute is slower
Write Cycle Time	55 ns	100 ns	Substitute is slower
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V	Match
Operating Temperature	0°C ~ 70°C	-55°C ~ 125°C	Substitute has wider range
Package Type	48-DIP (0.600", 15.24mm)	48-DIP (0.600", 15.24mm)	Match
Mounting Type	Through Hole	Through Hole	Match
Product Status	Obsolete	Active	Substitute is current
Base Product Number	7132LA	7132LA	Match

Engineering Selection Recommendations

The 7132LA100CB is the manufacturer-recommended substitute for the obsolete 7132LA55P. Selection of this substitute is justified on the following engineering grounds:

Product Status Advantage: The 7132LA100CB maintains active product status with Renesas Electronics, ensuring ongoing availability, technical support, and supply chain continuity. The 7132LA55P is obsolete and subject to inventory depletion.

Compliance and Certification: Both parts are RoHS non-compliant and REACH unaffected, maintaining equivalent regulatory classification. The 7132LA100CB carries ECCN 3A001A2C classification versus EAR99 for the main part, reflecting updated export control standards.

Operational Considerations: The 7132LA100CB operates across a wider temperature range (-55°C ~ 125°C) compared to the 7132LA55P (0°C ~ 70°C), providing enhanced thermal margin for industrial and extended-temperature applications. The substitute exhibits 100 ns access and write cycle times versus 55 ns for the original part. This performance difference is acceptable in systems where memory timing is not the critical path constraint.

Physical and Electrical Equivalence: Both parts share identical memory architecture (16Kbit, 2K x 8 organization, dual-port asynchronous SRAM), parallel interface, 48-DIP through-hole packaging, and 4.5V ~ 5.5V supply voltage compatibility. Pin-for-pin and footprint compatibility is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7132LA55P in existing designs?

A: Yes, the 7132LA100CB is pin-for-pin and footprint-compatible with the 7132LA55P. Both parts use 48-DIP through-hole packaging with identical pinout and electrical interface. No PCB redesign is required.

Q: What is the impact of the 100 ns access time on system performance?

A: The 7132LA100CB has a 45 ns slower access time (100 ns vs. 55 ns) than the original part. This difference is system-dependent. If memory access time is not on the critical timing path, the substitute operates without performance degradation. If timing margins are tight, system-level timing analysis is necessary to confirm compatibility.

Q: Why does the substitute have a wider operating temperature range?

A: The 7132LA100CB (-55°C ~ 125°C) supports extended industrial and military temperature specifications compared to the 7132LA55P (0°C ~ 70°C). This reflects the active product's design for broader application environments. Systems operating within 0°C ~ 70°C experience no thermal compatibility issues.

Q: Are there any packaging format differences between these parts?

A: The 7132LA55P is supplied in standard DIP packaging, while the 7132LA100CB is supplied in tube packaging. Both use identical 48-DIP (0.600", 15.24mm) body dimensions and through-hole mounting. Packaging format does not affect electrical or mechanical compatibility.

Q: What is the inventory status of these parts?

A: The 7132LA55P (748 pcs) is obsolete with limited remaining inventory. The 7132LA100CB (903 pcs) is an active product with ongoing availability from Renesas Electronics. For new production or long-term supply assurance, the 7132LA100CB is the recommended selection.

Q: Are both parts RoHS compliant?

A: No. Both the 7132LA55P and 7132LA100CB are RoHS non-compliant. If RoHS compliance is a system requirement, alternative memory solutions must be evaluated.

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