Equivalent & Substitute Parts for 7133LA55PF

Part Overview

The 7133LA55PF is a 32Kbit dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation in a 100-TQFP package. This memory IC operates with a 55 ns access time and write cycle time, supporting parallel data interfaces with 2K x 16 memory organization. The device is classified as obsolete, which necessitates identification of functionally compatible alternatives for ongoing system support and new designs requiring equivalent performance characteristics.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	32Kbit
Memory Organization	2K x 16
Memory Interface	Parallel
Access Time	55 ns
Write Cycle Time	55 ns
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	100-TQFP (14x14)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 7133LA55PF is determined by the following critical parameters that must remain constant or be compatible:

Memory capacity and organization (32Kbit, 2K x 16)
Memory technology (dual-port asynchronous SRAM)
Parallel interface architecture
Package form factor (100-TQFP, 14x14 mm)
Supply voltage range (4.5V ~ 5.5V)
Mounting type (surface mount)

The 7133LA20PFG qualifies as a substitute because it maintains identical memory capacity, organization, technology, interface type, package dimensions, voltage specifications, and mounting characteristics. The substitute part offers improved electrical performance through faster access and write cycle times (20 ns versus 55 ns), expanded operating temperature range (-55°C ~ 125°C versus 0°C ~ 70°C), and active product status with RoHS3 compliance.

Parameter Comparison

Parameter	7133LA55PF (Main Part)	7133LA20PFG (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	55 ns	20 ns
Write Cycle Time	55 ns	20 ns
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-55°C ~ 125°C
Package Type	100-TQFP (14x14)	100-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	Non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The 7133LA20PFG is the qualified substitute for the 7133LA55PF based on the following factors:

Functional compatibility is established through identical memory capacity, organization, technology, interface architecture, package dimensions, and voltage specifications. The substitute part maintains full electrical and mechanical interchangeability at the board level.

Product lifecycle status favors the substitute: the 7133LA20PFG holds active product status with ROHS3 compliance, whereas the 7133LA55PF is obsolete and non-compliant with current environmental regulations. This distinction is critical for long-term supply chain reliability and regulatory adherence.

Performance characteristics of the substitute exceed those of the main part. The 7133LA20PFG provides 2.75x faster access and write cycle times (20 ns versus 55 ns) and supports an extended operating temperature range (-55°C ~ 125°C versus 0°C ~ 70°C), enabling deployment in broader application environments.

Frequently Asked Questions (FAQ)

Q: Can the 7133LA20PFG directly replace the 7133LA55PF in existing designs?

A: Yes. Both parts share identical memory capacity (32Kbit), organization (2K x 16), dual-port asynchronous architecture, parallel interface, 100-TQFP package dimensions, supply voltage range (4.5V ~ 5.5V), and surface mount characteristics. No board redesign or signal integrity modifications are required.

Q: What are the key differences between these parts?

A: The primary differences are access time (20 ns versus 55 ns), write cycle time (20 ns versus 55 ns), operating temperature range (-55°C ~ 125°C versus 0°C ~ 70°C), product status (active versus obsolete), and RoHS compliance (ROHS3 compliant versus non-compliant). The substitute part offers superior electrical performance and regulatory compliance.

Q: Are there any package or pinout considerations?

A: Both parts use the 100-TQFP (14x14 mm) package with identical pinout and mounting type (surface mount). No PCB layout modifications are necessary for substitution.

Q: Why is the 7133LA55PF classified as obsolete?

A: The 7133LA55PF has reached end-of-life status in the manufacturer's product portfolio. The 7133LA20PFG represents the active equivalent within the same product family, offering improved performance and compliance with current environmental standards.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts carry MSL 3 (168 Hours) rating. This classification requires standard moisture control procedures during storage and handling to prevent degradation prior to soldering.

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