Renesas Electronics 7142LA35P SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7142LA35P is a 16Kbit dual-port asynchronous SRAM memory IC in 48-DIP packaging with 35 ns access time and parallel interface. This component is classified as obsolete, making substitute parts necessary for new designs, maintenance, or production continuity. The part operates within a 4.5V to 5.5V supply range and supports industrial temperature applications from 0°C to 70°C.

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
Write Cycle Time	35 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 7142LA35P is determined by the following critical parameters:

Core Compatibility Requirements:

Memory capacity: 16Kbit minimum
Memory organization: 2K x 8 configuration
Memory technology: Dual-port asynchronous SRAM
Interface type: Parallel
Package form factor: 48-DIP (0.600", 15.24mm)
Voltage supply range: 4.5V ~ 5.5V compatibility
Mounting type: Through-hole

Performance Considerations:

Access time and write cycle time determine speed compatibility
Operating temperature range defines application suitability
Product status (active vs. obsolete) affects long-term availability

The Renesas Electronics 7132LA100CB qualifies as a direct substitute based on matching memory capacity, organization, technology, interface, package dimensions, and voltage specifications. Differences in access time and operating temperature range reflect design variations within the same product family.

Parameter Comparison

Parameter	7142LA35P (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	0°C ~ 70°C	-55°C ~ 125°C
Package / Case	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

7132LA100CB Substitution Basis:

The 7132LA100CB is an active-status product from the same manufacturer (Renesas Electronics Corporation), providing long-term availability and supply chain continuity compared to the obsolete 7142LA35P. Both parts share identical memory capacity, organization, interface architecture, package dimensions, and voltage specifications, ensuring direct pin-for-pin compatibility in 48-DIP through-hole applications.

The 7132LA100CB operates across an extended temperature range (-55°C to 125°C) compared to the 7142LA35P (0°C to 70°C), offering broader environmental applicability. Access time and write cycle time increase from 35 ns to 100 ns; this performance difference must be evaluated against specific timing requirements in the target application.

Both parts maintain identical RoHS non-compliance status and REACH unaffected classification, with no change in regulatory compliance posture during substitution.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7142LA35P in existing designs?

A: Yes, for applications where the 100 ns access time and write cycle time are acceptable. The parts are pin-compatible in 48-DIP through-hole mounting and share identical memory capacity, organization, and voltage specifications. Timing-critical applications requiring 35 ns performance must be re-evaluated.

Q: What is the primary advantage of substituting to the 7132LA100CB?

A: The 7132LA100CB is an active product with ongoing manufacturer support and availability, whereas the 7142LA35P is obsolete. This ensures reliable sourcing for new production runs and future maintenance requirements.

Q: Are there package differences between these parts?

A: Both parts use 48-DIP (0.600", 15.24mm) through-hole packaging. The 7142LA35P uses standard 48-PDIP, while the 7132LA100CB uses 48-SIDE BRAZED packaging. Both maintain identical 0.600" width and 15.24mm pitch, ensuring mechanical compatibility in PCB layouts.

Q: How do the operating temperature ranges differ?

A: The 7142LA35P operates from 0°C to 70°C, while the 7132LA100CB operates from -55°C to 125°C. The substitute part supports extended temperature applications, including industrial and military environments. Applications limited to 0°C to 70°C operation are fully supported by the substitute.

Q: What compliance changes occur with substitution?

A: Both parts maintain RoHS non-compliant and REACH unaffected status. No change in regulatory compliance posture occurs during substitution.

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