Equivalent & Substitute Parts for Renesas 7143SA20J SRAM Memory IC

Part Overview

The Renesas 7143SA20J is a 32Kbit dual-port asynchronous SRAM memory IC in 68-PLCC packaging with 20 ns access time and parallel interface. This component is classified as obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and legacy equipment support. The obsolete status necessitates sourcing equivalent alternatives that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	32Kbit
Memory Organization	2K x 16
Memory Interface	Parallel
Access Time	20 ns
Write Cycle Time	20 ns
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	68-PLCC (J-Lead)
Package Dimensions	24.21 x 24.21 mm
Mounting Type	Surface Mount
Moisture Sensitivity Level	MSL 3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the 7143SA20J are identified based on strict equivalence across the following critical parameters:

Memory capacity and organization (32Kbit, 2K x 16 configuration)
Dual-port asynchronous SRAM technology
Parallel interface architecture
Access and write cycle timing (20 ns)
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (0°C ~ 70°C)
Physical package specification (68-PLCC with identical footprint dimensions)
Moisture sensitivity classification (MSL 3)

The 7143LA20JG meets all these criteria and is manufactured by the same supplier (Renesas Electronics Corporation), ensuring functional and mechanical interchangeability.

Parameter Comparison

Parameter	7143SA20J (Main Part)	7143LA20JG (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	32Kbit	32Kbit
Memory Organization	2K x 16	2K x 16
Memory Interface	Parallel	Parallel
Access Time	20 ns	20 ns
Write Cycle Time	20 ns	20 ns
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package Type	68-PLCC (J-Lead)	68-PLCC (J-Lead)
Package Dimensions	24.21 x 24.21 mm	24.21 x 24.21 mm
Mounting Type	Surface Mount	Surface Mount
Moisture Sensitivity Level	MSL 3 (168 Hours)	MSL 3 (168 Hours)
Product Status	Obsolete	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 7143LA20JG is the direct substitute for the obsolete 7143SA20J. Both parts share identical electrical specifications, memory architecture, and physical packaging. The primary distinction is product status and regulatory compliance: the 7143LA20JG maintains active production status and meets ROHS3 compliance requirements, whereas the 7143SA20J is obsolete and non-compliant with current RoHS standards.

For new designs or system replacements, the 7143LA20JG is the appropriate selection. For legacy system repairs requiring exact form-factor and functional equivalence, the 7143LA20JG provides direct compatibility with the original 7143SA20J specification.

Frequently Asked Questions (FAQ)

Q: Can the 7143LA20JG be used as a direct replacement for the 7143SA20J?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters: 32Kbit dual-port asynchronous SRAM, 20 ns access time, parallel interface, 4.5V–5.5V supply voltage, 0°C–70°C operating range, and 68-PLCC packaging with identical footprint dimensions.

Q: What is the difference between these two part numbers?

A: The 7143LA20JG is the active production equivalent of the obsolete 7143SA20J. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 compliant vs. non-compliant). All functional and electrical parameters are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the 68-PLCC (J-Lead) package with identical dimensions of 24.21 x 24.21 mm. Pinout and footprint are equivalent, allowing direct PCB substitution.

Q: What is the moisture sensitivity level for these parts?

A: Both the 7143SA20J and 7143LA20JG are classified as MSL 3, with a floor life of 168 hours after moisture exposure. Standard moisture control procedures apply during storage and handling.

Q: Is the 7143LA20JG available in different packaging options?

A: The 7143LA20JG is supplied in tube packaging. The 7143SA20J was supplied without specified packaging designation. Both maintain the same 68-PLCC component package.

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