Equivalent & Substitute Parts for Renesas 7143SA55PF8

Part Overview

The Renesas 7143SA55PF8 is a 32Kbit dual-port asynchronous SRAM with parallel interface, packaged in 100-TQFP (14x14mm). This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The part operates within the 4.5V to 5.5V supply range with 55ns access time and is suitable for applications requiring volatile memory with dual-port architecture.

Substiute Parts

7143SA55PF8

Renesas Electronics CorporationIn Stock: 11827143SA55PF8 Datasheet

Current PartRFQ

7143LA20JG8

Renesas Electronics CorporationIn Stock: 11867143LA20JG8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7143SA55PF8 is determined by the following critical parameters:

• Memory capacity (32Kbit) and organization (2K x 16) must remain identical
• Memory type and format (dual-port asynchronous SRAM) must be preserved
• Parallel interface architecture must be maintained
• Voltage supply range (4.5V ~ 5.5V) must be compatible
• Operating temperature range (0°C ~ 70°C) must be supported
• Surface mount technology requirement must be met

The 7143LA20JG8 qualifies as a substitute based on matching memory capacity, organization, type, format, interface, voltage range, and temperature specifications. Differences in access time (20ns vs 55ns) and package form factor represent improvements and alternative options rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The 7143LA20JG8 is the designated manufacturer-recommended substitute for the obsolete 7143SA55PF8. Selection of this alternative is supported by:

• Active product status ensuring continued availability and manufacturing support
• ROHS3 compliance meeting current environmental and regulatory requirements
• Identical core memory specifications (capacity, organization, interface, voltage, temperature)
• Improved access and write cycle times (20ns vs 55ns), providing performance headroom
• Same moisture sensitivity classification

Package form factor differs (68-PLCC vs 100-TQFP), requiring PCB layout modification. Pin count reduction from 100 to 68 necessitates schematic and board redesign validation.

Frequently Asked Questions (FAQ)

Q: Can the 7143LA20JG8 directly replace the 7143SA55PF8 without design changes?

A: No. While memory specifications are identical, the package change from 100-TQFP to 68-PLCC requires PCB layout modification and pin mapping verification. Schematic redesign is necessary.

Q: What is the significance of the access time difference (55ns vs 20ns)?

A: The 7143LA20JG8 provides faster memory access. This represents a performance improvement and does not create compatibility issues in systems designed for the slower 7143SA55PF8.

Q: Why is RoHS compliance important for this substitution?

A: The 7143SA55PF8 is RoHS non-compliant, while the 7143LA20JG8 is ROHS3 compliant. For new designs and applications subject to environmental regulations, the compliant substitute is required.

Q: Are the voltage supply and operating temperature ranges identical?

A: Yes. Both parts operate within 4.5V to 5.5V supply range and 0°C to 70°C temperature range, ensuring functional compatibility in equivalent system environments.

Q: What does the package designation change mean?

A: 100-TQFP (Thin Quad Flat Pack) contains 100 pins in a 14x14mm footprint. 68-PLCC (Plastic Leaded Chip Carrier) contains 68 pins in a 24.21x24.21mm footprint. Physical dimensions and pin assignments differ significantly.