Renesas Electronics 7142LA55P SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 7142LA55P 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 substitute parts necessary for new designs and ongoing system support. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring parallel memory interfaces with fast access characteristics.

Substiute Parts

7142LA55P

Renesas Electronics CorporationIn Stock: 9187142LA55P Datasheet

Current PartRFQ

7132LA100CB

Renesas Electronics CorporationIn Stock: 9857132LA100CB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7142LA55P is determined by the following critical parameters:

• Memory capacity and organization (16Kbit, 2K x 8 configuration)
• Dual-port asynchronous SRAM technology
• Parallel memory interface
• 48-DIP package footprint compatibility
• Supply voltage range (4.5V ~ 5.5V)
• Through-hole mounting capability

The Renesas Electronics 7132LA100CB qualifies as a functional substitute based on matching memory size, organization, technology, interface type, voltage requirements, and package dimensions. The primary difference is access time specification (100 ns versus 55 ns), which represents a relaxed timing requirement suitable for applications where the original 55 ns specification is not mandatory.

Parameter Comparison

Engineering Selection Recommendations

The 7132LA100CB is the qualified substitute for the obsolete 7142LA55P based on the following criteria:

• Both components share identical memory capacity, organization, and interface specifications
• Package footprint and mounting type are fully compatible
• Supply voltage requirements are identical
• The substitute part maintains active product status, ensuring availability and supply chain continuity
• The substitute part supports an extended operating temperature range (-55°C ~ 125°C), providing broader environmental compatibility compared to the original specification (0°C ~ 70°C)
• Both parts carry identical RoHS and REACH compliance classifications

The primary design consideration is the relaxed access time specification of the 7132LA100CB (100 ns versus 55 ns). Component selection should be based on system timing requirements. If the original 55 ns specification is critical to system operation, timing analysis must confirm that the 100 ns access time does not violate circuit constraints.

Frequently Asked Questions (FAQ)

Q: Can the 7132LA100CB directly replace the 7142LA55P in existing designs?

A: Direct pin-for-pin replacement is possible due to identical package footprint and pinout. However, the relaxed access time (100 ns versus 55 ns) must be evaluated against system timing requirements. If the circuit was designed with 55 ns timing margins, the substitute part may not meet performance specifications.

Q: What is the difference between the 48-DIP and 48-SIDE BRAZED packages?

A: Both parts use 48-DIP packaging with identical 0.600" (15.24mm) dimensions. The supplier device package designation differs (48-PDIP versus 48-SIDE BRAZED), but the physical footprint and mounting compatibility remain unchanged for through-hole PCB assembly.

Q: Are there temperature range implications when substituting the 7132LA100CB?

A: The substitute part supports an extended operating temperature range (-55°C ~ 125°C) compared to the original (0°C ~ 70°C). This provides additional environmental flexibility for applications requiring operation outside the original specification range.

Q: What compliance considerations apply to both parts?

A: Both the 7142LA55P and 7132LA100CB are RoHS non-compliant and REACH unaffected. Systems requiring RoHS compliance cannot use either component without design modification.

Q: Is the 7132LA100CB the only available substitute?

A: Based on the provided substitute list, the 7132LA100CB is the documented equivalent for the 7142LA55P. Component selection should be verified against current inventory and application-specific requirements.