Equivalent & Substitute Parts for Renesas Electronics 7133LA55GB

Part Overview

The Renesas Electronics 7133LA55GB is a 32Kbit dual-port asynchronous SRAM with parallel interface, organized as 2K x 16 bits. This component operates at 55 ns access time and is housed in a 68-pin PGA package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, redesign, and procurement planning. Substitute parts must maintain compatibility across memory capacity, organization, interface type, and electrical specifications while accommodating differences in access time, package form factor, and product lifecycle status.

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	55 ns
Write Cycle Time	55 ns
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C
Package Type	68-BPGA
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution eligibility for the 7133LA55GB is determined by the following mandatory parameters:

Memory Capacity & Organization: All substitutes must provide 32Kbit capacity in 2K x 16 organization to ensure address and data bus compatibility
Memory Technology: Dual-port asynchronous SRAM architecture is required for functional equivalence
Parallel Interface: The parallel memory interface must be maintained
Supply Voltage Range: 4.5V ~ 5.5V compatibility is mandatory
Access Time Compatibility: Substitute parts may have equal or faster access times; slower access times are not acceptable for direct substitution
Package & Mounting: Substitutes may differ in package form factor (68-PLCC vs. 68-BPGA) and mounting type (surface mount vs. through hole), provided PCB layout and assembly capabilities support the alternative

The identified substitutes meet these core criteria while differing in access time performance, package configuration, and product lifecycle status.

Parameter Comparison

Parameter	7133LA55GB (Main)	7133LA20JG (Substitute)	7133SA90GB (Substitute)
Manufacturer	Renesas Electronics	Renesas Electronics	Renesas Electronics
Memory Size	32Kbit	32Kbit	32Kbit
Memory Organization	2K x 16	2K x 16	2K x 16
Memory Type	Dual Port Asynchronous SRAM	Dual Port Asynchronous SRAM	Dual Port Asynchronous SRAM
Access Time	55 ns	20 ns	90 ns
Write Cycle Time	55 ns	20 ns	90 ns
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C	0°C ~ 70°C	-55°C ~ 125°C
Package / Case	68-BPGA (29.46x29.46)	68-LCC J-Lead (24.21x24.21)	68-BPGA (29.46x29.46)
Mounting Type	Through Hole	Surface Mount	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant

Engineering Selection Recommendations

7133LA20JG Selection Criteria: This substitute offers superior access time performance (20 ns vs. 55 ns) and is actively manufactured with ROHS3 compliance. Selection is appropriate for applications where faster memory access improves system performance. The transition from through-hole 68-BPGA to surface-mount 68-PLCC packaging requires PCB redesign and assembly process modification. Operating temperature range is restricted to 0°C ~ 70°C, limiting use in extended temperature applications. Moisture sensitivity level increases from MSL 1 to MSL 3, requiring controlled storage and handling procedures.

7133SA90GB Selection Criteria: This substitute maintains identical package form factor (68-BPGA) and mounting type (through hole), minimizing PCB layout changes. Access time is degraded to 90 ns, suitable only for applications with relaxed timing requirements. Operating temperature range matches the main part (-55°C ~ 125°C), supporting extended temperature environments. Active product status ensures continued availability. RoHS non-compliance matches the main part, maintaining consistency in environmental compliance posture.

Frequently Asked Questions (FAQ)

Q: Can 7133LA20JG be used as a direct pin-for-pin replacement? A: No. While electrical parameters are compatible, the package differs (68-PLCC surface mount vs. 68-BPGA through hole). Pin-for-pin compatibility exists only at the functional level. PCB redesign is required.

Q: Is 7133SA90GB suitable for all applications using 7133LA55GB? A: No. The 90 ns access time is slower than the original 55 ns specification. Use only in applications where timing analysis confirms acceptable performance at the degraded speed.

Q: What is the impact of switching to 7133LA20JG in terms of temperature range? A: The operating temperature range narrows from -55°C ~ 125°C to 0°C ~ 70°C. Applications requiring extended temperature operation must use 7133SA90GB or source alternative components.

Q: Are there RoHS compliance implications when substituting? A: The main part and 7133SA90GB are both RoHS non-compliant. Substitution with 7133LA20JG introduces ROHS3 compliance, which may require design documentation updates and supply chain verification.

Q: How does moisture sensitivity level affect component handling? A: The main part has MSL 1 (unlimited shelf life). The 7133LA20JG has MSL 3 (168-hour limit after moisture exposure). Storage, handling, and reflow procedures must be adjusted accordingly.

Q: Can both substitutes be used interchangeably in the same design? A: No. They differ in package type, mounting method, access time, and temperature range. Each requires separate design validation and PCB implementation.

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