Equivalent & Substitute Parts for 7142SA55CB

Part Overview

The 7142SA55CB is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation, packaged in a 48-DIP (0.600", 15.24mm) through-hole configuration. This component features a 55 ns access time and operates across a supply voltage range of 4.5V to 5.5V with an operating temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for system maintenance, repair, and legacy equipment support.

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	-55°C ~ 125°C
Package Type	48-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Supplier Device Package	48-SIDE BRAZED

Substitute Part Grouping Explanation

Substitution of the 7142SA55CB is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (16Kbit, 2K x 8 configuration)
Dual-port asynchronous SRAM technology
Parallel memory interface
48-DIP through-hole package with 0.600" (15.24mm) body width
Supply voltage compatibility (4.5V ~ 5.5V)
Operating temperature range (-55°C ~ 125°C)

The 7132LA100CB qualifies as a substitute based on matching all mechanical and electrical compatibility criteria. The primary difference is access time specification: the substitute operates at 100 ns versus the original 55 ns. This represents a slower speed grade of the same memory architecture and package configuration.

Parameter Comparison

Parameter	7142SA55CB (Main Part)	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	-55°C ~ 125°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
Supplier Device Package	48-SIDE BRAZED	48-SIDE BRAZED
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 7132LA100CB is the manufacturer-recommended substitute for the obsolete 7142SA55CB. Both components are manufactured by Renesas Electronics Corporation and share identical mechanical packaging, electrical supply requirements, and operating temperature specifications.

Selection of the 7132LA100CB is appropriate for applications where the 100 ns access time specification is compatible with system timing requirements. The substitute maintains full pin-for-pin compatibility and identical memory organization, ensuring direct replacement capability in through-hole PCB designs.

Both parts carry identical RoHS non-compliant and REACH Unaffected designations, reflecting their legacy status. The 7132LA100CB holds active product status, providing superior availability compared to the obsolete 7142SA55CB.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7142SA55CB in existing designs?

A: Yes, the 7132LA100CB provides pin-for-pin compatibility and identical package configuration. Both components use the 48-DIP through-hole package with 0.600" body width and 48-SIDE BRAZED supplier packaging. Mechanical and electrical interface compatibility is complete.

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

A: The access time and write cycle time differ. The 7142SA55CB operates at 55 ns, while the 7132LA100CB operates at 100 ns. This represents a slower speed grade of the same dual-port asynchronous SRAM architecture.

Q: Are there timing considerations when substituting the 7132LA100CB?

A: System timing requirements must accommodate the 100 ns access time specification of the substitute. Applications designed for 55 ns operation require evaluation to confirm compatibility with the slower speed grade.

Q: Do both parts meet the same compliance standards?

A: Both components share identical RoHS non-compliant and REACH Unaffected designations. Compliance status is equivalent between the main part and substitute.

Q: Why is the 7142SA55CB classified as obsolete?

A: The 7142SA55CB is no longer in active production. The 7132LA100CB represents the active product offering from Renesas Electronics Corporation for this memory architecture and package configuration.

Q: Are there inventory differences between these parts?

A: The 7142SA55CB has 1099 pieces available as new original stock. The 7132LA100CB has 903 pieces available as new original stock in tube packaging. Availability of the obsolete part may be limited as existing inventory depletes.

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