Equivalent & Substitute Parts for Renesas 7142LA55C

Part Overview

The Renesas 7142LA55C is a 16Kbit dual-port asynchronous SRAM with parallel interface, organized as 2K x 8, featuring 55 ns access time and 48-DIP through-hole packaging. This part is classified as obsolete, making substitute identification necessary for ongoing system support and component procurement. The 7142LA55C operates within the 4.5V to 5.5V supply range and is suitable for legacy embedded systems requiring volatile memory with fast parallel access.

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 eligibility for the 7142LA55C is determined by the following critical parameters:

Memory capacity (16Kbit) and organization (2K x 8) must remain identical
Dual-port asynchronous SRAM technology must be maintained
Parallel interface configuration must be preserved
Package type (48-DIP, 0.600" pitch) must match for mechanical compatibility
Supply voltage range (4.5V ~ 5.5V) must be compatible
Access time and write cycle time may differ, provided the substitute meets or exceeds performance requirements

The Renesas 7132LA100CB qualifies as a direct substitute based on these criteria. While it features a slower 100 ns access time compared to the original 55 ns specification, it maintains identical memory capacity, organization, interface type, and physical packaging. The extended operating temperature range (-55°C ~ 125°C) of the 7132LA100CB provides broader environmental compatibility.

Parameter Comparison

Parameter	7142LA55C (Original)	7132LA100CB (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	100 ns
Write Cycle Time	55 ns	100 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature Range	0°C ~ 70°C	-55°C ~ 125°C
Package Type	48-DIP (0.600", 15.24mm)	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
RoHS Status	Non-compliant	Non-compliant

Engineering Selection Recommendations

The 7132LA100CB is the qualified substitute for the obsolete 7142LA55C. Selection of this substitute is supported by the following factors:

Active product status ensures ongoing availability and supply chain continuity
Identical memory capacity, organization, and interface specifications guarantee functional compatibility
Matching 48-DIP package and through-hole mounting enable direct board-level replacement without layout modifications
Compatible supply voltage range (4.5V ~ 5.5V) maintains electrical compatibility with existing power distribution
Extended operating temperature range provides enhanced environmental flexibility
Both parts maintain identical RoHS non-compliance status, ensuring regulatory consistency

The performance difference (100 ns versus 55 ns access time) must be evaluated within the context of the target application's timing requirements. Systems designed for the original 55 ns specification may require timing analysis to confirm compatibility with the slower substitute.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7142LA55C on existing PCBs?

A: Yes. Both parts use identical 48-DIP packaging with 0.600" (15.24mm) pitch and through-hole mounting. No PCB modifications are required for physical installation.

Q: What is the primary difference between these two parts?

A: The access time and write cycle time differ: the original 7142LA55C operates at 55 ns, while the 7132LA100CB operates at 100 ns. Both maintain identical memory capacity (16Kbit, 2K x 8 organization) and parallel interface configuration.

Q: Are there voltage compatibility concerns?

A: No. Both parts operate within the identical 4.5V to 5.5V supply voltage range, ensuring direct electrical compatibility.

Q: Does the operating temperature range difference affect substitution?

A: The 7132LA100CB features an extended operating temperature range (-55°C ~ 125°C) compared to the original (0°C ~ 70°C). This provides broader environmental capability and does not restrict substitution in applications within the original temperature specification.

Q: Is the 7132LA100CB suitable for timing-critical applications?

A: The 100 ns access time of the 7132LA100CB is slower than the original 55 ns specification. Applications with strict timing requirements must verify that the extended access time does not violate system timing constraints.

Q: What is the product status significance?

A: The 7142LA55C is obsolete, meaning it is no longer manufactured or supported. The 7132LA100CB is active, ensuring continued availability and supply chain support for new procurements and system maintenance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message