Equivalent & Substitute Parts for 7142LA35CB

Part Overview

The 7142LA35CB is a 16Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation. This parallel interface memory IC operates at 35 ns access time with a 48-DIP through-hole package. The part is classified as obsolete, making identification of compatible substitutes essential for system maintenance, repair, and legacy equipment support. Substitute parts must maintain electrical and mechanical compatibility while meeting the same functional requirements.

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	35 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

Substitute Part Grouping Explanation

Substitution eligibility for the 7142LA35CB is determined by the following critical parameters:

Memory capacity (16Kbit) and organization (2K x 8) must be identical
Dual-port asynchronous SRAM technology must be maintained
Parallel interface configuration must match
Package type must be 48-DIP through-hole to ensure mechanical compatibility
Voltage supply range must encompass or match 4.5V ~ 5.5V
Operating temperature range must cover -55°C ~ 125°C

The 7132LA100CB qualifies as a substitute based on these criteria. While the access time differs (100 ns versus 35 ns), this parameter does not restrict substitution in applications where the slower speed is acceptable. The substitute maintains identical memory capacity, organization, interface type, package configuration, voltage specifications, and temperature range.

Parameter Comparison

Parameter	7142LA35CB (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	35 ns	100 ns
Write Cycle Time	35 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
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

The 7132LA100CB is the qualified substitute for the 7142LA35CB. Selection should be based on the following factors:

The main part is obsolete, while the substitute maintains active product status, ensuring continued availability and supply chain reliability. Both parts share identical RoHS non-compliance status, maintaining regulatory consistency in legacy system applications.

The primary difference between the parts is access time: the substitute operates at 100 ns compared to the original 35 ns. This slower speed is acceptable in applications where timing margins permit the extended access time. System designers must confirm that the 100 ns access time does not violate critical timing requirements before implementation.

Both parts carry identical ECCN and HTSUS classifications, ensuring consistent export and import compliance. Moisture sensitivity level (MSL 1 - Unlimited) is identical, requiring no changes to storage or handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7142LA35CB in all applications?

A: Direct replacement is possible only in applications where the 100 ns access time meets system timing requirements. The slower speed of the substitute must be evaluated against circuit timing constraints. If the original 35 ns specification is critical to system operation, the substitute is not suitable.

Q: Are the packages physically identical?

A: Yes. Both parts use 48-DIP (0.600", 15.24mm) through-hole packages. Pin-to-pin compatibility is maintained, allowing direct socket substitution from a mechanical standpoint.

Q: What is the difference in supply availability?

A: The 7142LA35CB is obsolete with limited remaining inventory. The 7132LA100CB maintains active product status with current manufacturing support, providing superior long-term availability and supply chain stability.

Q: Do voltage and temperature specifications differ?

A: No. Both parts operate across identical voltage ranges (4.5V ~ 5.5V) and temperature ranges (-55°C ~ 125°C). No power supply or thermal management modifications are required.

Q: Are there compliance or certification differences?

A: Both parts share identical RoHS non-compliance status, ECCN classification, and HTSUS codes. No changes to regulatory documentation or compliance procedures are necessary.

Q: What is the memory organization of these parts?

A: Both the 7142LA35CB and 7132LA100CB are organized as 2K x 8 (2048 words by 8 bits), providing 16Kbit total capacity. Memory addressing and data bus configuration remain unchanged.

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