Equivalent & Substitute Parts for Renesas 7207L20PDG

Part Overview

The Renesas 7207L20PDG is an asynchronous FIFO memory IC with 288K capacity (32K x 9 bits) designed for high-speed data buffering applications. This device features a 20ns access time, operates at 33.3MHz, and is housed in a 28-pin DIP package for through-hole mounting. The product is classified as obsolete, making identification of compatible substitute components essential for ongoing system support, redesigns, and production continuity.

Substiute Parts

7207L20PDG

Renesas Electronics CorporationIn Stock: 8297207L20PDG Datasheet

Current PartRFQ

7207LA15JG

Renesas Electronics CorporationIn Stock: 8997207LA15JG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7207L20PDG is determined by strict alignment with the following core parameters:

Memory Architecture: The substitute must maintain identical memory capacity of 288K (32K x 9 bits) and asynchronous FIFO function to ensure data path compatibility without firmware modification.

Electrical Specifications: Supply voltage range (4.5V ~ 5.5V), maximum supply current (120mA), and uni-directional bus configuration must remain constant to prevent circuit redesign.

Functional Features: Retransmit capability must be present; FWFT support and programmable flags support status must match the original specification.

Operating Conditions: Temperature range (0°C ~ 70°C) must be maintained for thermal compatibility.

Performance Characteristics: Access time and data rate may improve (decrease/increase respectively) without creating functional incompatibility, provided the device operates within the same voltage and temperature envelope.

Package Consideration: While the original uses through-hole 28-DIP mounting, surface-mount alternatives with equivalent electrical performance are listed as substitutes when all other parameters align. Physical integration requires board-level design evaluation.

Parameter Comparison

Engineering Selection Recommendations

7207LA15JG as Primary Substitute

The Renesas 7207LA15JG is the manufacturer-recommended substitute for the obsolete 7207L20PDG. This device maintains full electrical and functional equivalence across all critical parameters: identical memory capacity, asynchronous FIFO architecture, supply voltage range, current specifications, and operating temperature envelope.

The 7207LA15JG provides performance enhancements with 15ns access time (versus 20ns) and 40MHz data rate capability (versus 33.3MHz), delivering improved timing margins without introducing incompatibility. Both devices support retransmit capability and operate within the same 4.5V to 5.5V supply range.

Product Status Advantage: The 7207LA15JG holds active product status with confirmed inventory availability (844 units), ensuring long-term supply chain reliability compared to the obsolete 7207L20PDG.

Package and Mounting Transition: The primary design difference is the transition from through-hole 28-DIP to surface-mount 32-PLCC (J-Lead) packaging. This change requires PCB layout modification and socket/footprint redesign. Organizations maintaining legacy through-hole assembly processes must evaluate board-level integration feasibility or consider alternative procurement strategies for the original 7207L20PDG if available from secondary sources.

Electrical Compatibility: No circuit modifications are required for voltage, current, or signal timing. The substitute operates within identical electrical parameters and maintains functional compatibility with existing system designs.

Frequently Asked Questions (FAQ)

Q: Can the 7207LA15JG directly replace the 7207L20PDG without circuit modifications?

A: Electrical compatibility is complete. The 7207LA15JG maintains identical supply voltage (4.5V ~ 5.5V), current specifications (120mA maximum), memory capacity (288K), and functional architecture. No circuit redesign is required. However, the package change from 28-DIP to 32-PLCC requires PCB footprint modification and assembly process adjustment.

Q: What is the significance of the faster access time (15ns vs. 20ns) in the substitute?

A: The 15ns access time in the 7207LA15JG represents improved performance that enhances system timing margins. This faster specification is backward-compatible with designs originally specified for 20ns access time, as the substitute meets or exceeds the original timing requirements. No timing violations will occur in existing circuit designs.

Q: Does the higher data rate (40MHz vs. 33.3MHz) affect system compatibility?

A: No. The 40MHz capability of the 7207LA15JG exceeds the original 33.3MHz specification, providing additional performance headroom. Systems designed for 33.3MHz operation will function correctly with the higher-rated substitute without modification.

Q: Why is the package different between the original and substitute?

A: The transition from 28-DIP through-hole to 32-PLCC surface-mount reflects modern manufacturing practices and component availability. The 32-PLCC package offers improved electrical performance characteristics and is the current production standard for this memory architecture. Through-hole 28-DIP components are increasingly obsolete in new component production.

Q: Is the 7207LA15JG the only available substitute?

A: The 7207LA15JG is the manufacturer-recommended substitute from Renesas Electronics Corporation. It is the specified equivalent for the obsolete 7207L20PDG based on functional and electrical parameter alignment.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by: (1) identical memory capacity and architecture (288K, 32K x 9, asynchronous FIFO), (2) matching supply voltage range (4.5V ~ 5.5V), (3) equivalent or improved access time and data rate, (4) identical bus configuration (uni-directional), (5) matching functional features (retransmit capability), and (6) identical operating temperature range (0°C ~ 70°C).

Q: What design considerations are necessary for the package transition?

A: The 32-PLCC J-Lead package requires: (1) new PCB footprint design matching 32-PLCC specifications (14mm x 11.46mm), (2) surface-mount assembly process compatibility, (3) solder reflow profile adjustment, and (4) board layout modifications to accommodate the different pin configuration and spacing. Through-hole assembly equipment cannot be used with surface-mount components.

Q: Is the 7207LA15JG available in inventory?

A: Yes. The 7207LA15JG is confirmed in active product status with 844 units available as new original stock, ensuring supply chain continuity compared to the obsolete 7207L20PDG.