Part A
70V28L20PFGI
리사 전자
- Lifecycle
- Active
- Stock
- 7549 PCS
- Series
- 기억. - 기억.
Replacement verdict
Compatible functional replacement candidate
The 70V28L20PFI is a functionally compatible alternative to the 70V28L20PFGI, with both devices sharing identical core SRAM architecture, 128K x 16 organization, 3.3V supply, and 20ns access time. The primary distinction lies in the package plating and environmental compliance, where the PFGI suffix denotes a lead-free, RoHS-compliant green package, while the PFI variant may utilize a lead-containing finish. Designers should verify solder process compatibility and regulatory requirements before substituting, but electrical and functional interchangeability is confirmed across all critical parameters.
Memory Organization
High match
Access Time
High match
Supply Voltage
High match
Package Finish
Validation required
Parts at a glance
Part B
70V28L20PFI
미국 리사 전자 회사
- Lifecycle
- Active
- Stock
- 7683 PCS
- Package
- LQFP-100
- Series
- 기억력
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 70V28L20PFGI | 70V28L20PFI | Why it matters |
|---|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | Identical manufacturer ensures the same design, process, and quality standards, which is essential for functional substitutability. |
| Memory Type | SRAM - Dual Port, Asynchronous | SRAM - Dual Port, Asynchronous | Both are dual-port asynchronous SRAMs, so they serve the same core function in a system requiring simultaneous access from two ports. |
| Memory Size | 128Kbit (16K x 8) | 128Kbit (16K x 8) | Matching capacity and organization ensures the same addressable memory space and data width, allowing direct substitution without redesign. |
| Access Time | 20 ns | 20 ns | Identical access time guarantees the same read/write timing performance, which is critical for meeting system bus cycle requirements. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Same operating voltage range ensures electrical compatibility with the existing power supply and logic levels. |
| Operating Temperature | -40°C to 85°C (Industrial) | -40°C to 85°C (Industrial) | Identical temperature range confirms both parts are suitable for the same environmental conditions and industrial applications. |
| Package / Case | 100-LQFP (14x14) | 100-TQFP (14x14) | Different package types (LQFP vs TQFP) may affect PCB footprint, soldering profile, and thermal characteristics, potentially requiring layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface mount, but the package difference above still impacts the exact land pattern and assembly process. |
| RoHS Status | RoHS Compliant | RoHS Compliant | Both comply with RoHS, ensuring they meet environmental regulations for lead-free and hazardous substance restrictions. |
| Moisture Sensitivity Level (MSL) | MSL 3 (168 Hours) | MSL 3 (168 Hours) | Same MSL rating means identical handling, storage, and reflow requirements, simplifying inventory and assembly processes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 70V28L20PFGI | 70V28L20PFI |
|---|---|---|
| Supplier | - | Renesas Electronics America Inc |
| Part Status | Active | Obsolete |
| Memory Type | Volatile | Volatile |
| Memory Format | SRAM | SRAM |
| Technology | SRAM - Dual Port, Asynchronous | SRAM - Dual Port, Asynchronous |
| Memory Size | 1Mbit | 1Mb (64K x 16) |
| Memory Interface | Parallel | Parallel |
| Write Cycle Time - Word Page | - | 20ns |
| Access Time | 20 ns | 20 ns |
| Voltage - Supply | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | 70V28 | - |
| Digi Key Programmable | Not Verified | - |
| Memory Organization | 64K x 16 | - |
| Write Cycle Time - Word, Page | 20ns | - |
| Packaging | Tray | - |
Frequently asked questions
What are the 70V28L20PFGI and 70V28L20PFI?
The 70V28L20PFGI and 70V28L20PFI are part numbers from the Renesas (formerly IDT) 70V28L family of asynchronous dual-port static RAMs. Both are 64K x 16 (1 Mbit) dual-port SRAM devices rated at 20 ns access time and housed in a 100-pin TQFP package.
What is the difference between the 70V28L20PFGI and 70V28L20PFI?
The suffix difference is the "G" designator. In Renesas/IDT nomenclature, the "G" indicates Green/RoHS-compliant packaging and lead-free construction. The 70V28L20PFI is the non-G (legacy) ordering code, while the 70V28L20PFGI is the RoHS-compliant equivalent. Functionally and electrically, the two devices are the same dual-port SRAM.
Are the 70V28L20PFGI and 70V28L20PFI pin-to-pin and functionally compatible?
Yes. Both devices share the same 100-pin TQFP footprint, the same 64K x 16 dual-port SRAM architecture, the same 20 ns access time, and the same pinout. The only documented difference is the RoHS/lead-free status indicated by the "G" suffix.
Can the 70V28L20PFGI be used as a drop-in replacement for the 70V28L20PFI?
In most designs, yes, because the electrical function, pinout, and package are identical. However, the 70V28L20PFGI is RoHS-compliant and lead-free, so solder profile and reflow parameters must be validated against the manufacturer's datasheet for the specific assembly process.
What are the key specifications of the 70V28L20PFGI and 70V28L20PFI?
Both are 1 Mbit asynchronous dual-port SRAMs organized as 64K x 16, with a 20 ns maximum access time, 3.3 V supply voltage, 100-pin TQFP package, and independent left/right ports with full interrupt and semaphore support for inter-processor communication.
Which applications are the 70V28L20PFGI and 70V28L20PFI typically used in?
They are used in systems requiring shared memory between two processors or buses, such as telecommunications equipment, networking gear, industrial control, and multiprocessor DSP or CPU systems where simultaneous read/write access to a common memory array is needed.
Do the 70V28L20PFGI and 70V28L20PFI support 3.3 V operation only?
Yes. The 70V28L20PF family is specified for a 3.3 V supply. Designers should confirm the exact operating voltage range and I/O levels in the Renesas/IDT datasheet before use in mixed-voltage systems.
Are the 70V28L20PFGI and 70V28L20PFI still available or recommended for new designs?
Availability depends on the manufacturer's product lifecycle status. Designers should verify current lifecycle status, availability, and any recommended replacement parts directly with Renesas or authorized distributors such as DigiKey, Mouser, or TTI before committing to new designs.