Part A
70V28L20PFGI
Renesas ÉLECTRONIQUE
- Lifecycle
- Active
- Stock
- 7549 PCS
- Series
- Mémoire - mémoire
Replacement verdict
Compatible functional replacement candidate
The 70V28L15PF is a viable functional replacement candidate for the 70V28L20PFGI, sharing identical organization, package, and operating conditions, with the primary distinction being access speed. The faster 15 ns variant can substitute the 20 ns device in most designs, though timing margin should be validated against the system's worst-case requirements.
Memory Organization
High match
Package Type
High match
Access Time
Validation required
Operating Temperature Range
High match
Parts at a glance
Part B
70V28L15PF
Renesas Electronics, États - Unis
- Lifecycle
- Active
- Stock
- 7145 PCS
- Package
- LQFP-100
- Series
- Mémoire
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 | 70V28L15PF | Why it matters |
|---|---|---|---|
| Access Time | 20 ns | 15 ns | Faster access time improves read/write performance and may be required for timing-critical designs. |
| Memory Type | SRAM (Dual-Port) | SRAM (Dual-Port) | Both must be the same memory technology to be functionally interchangeable. |
| Memory Size | 32 Kbit | 32 Kbit | Identical capacity ensures the same addressable storage space in the target system. |
| Organization | 2K x 16 | 2K x 16 | Matching word width and depth is essential for direct pin-compatible substitution. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Same operating voltage range ensures compatibility with the existing power supply. |
| Package / Mounting | TQFP-100 / Surface Mount | TQFP-100 / Surface Mount | Identical package and mounting type allow drop-in replacement on the same PCB footprint. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Same temperature range ensures reliable operation in the same environmental conditions. |
| Interface Type | Parallel Asynchronous | Parallel Asynchronous | Matching interface protocol is required for the host controller to communicate correctly. |
| RoHS Compliance | RoHS Compliant | RoHS Compliant | Both meeting RoHS ensures regulatory compliance for the same market applications. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 70V28L20PFGI | 70V28L15PF |
|---|---|---|
| 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 | - | 15ns |
| Access Time | 20 ns | 15 ns |
| Voltage - Supply | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) | 0°C ~ 70°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 primary differences between the 70V28L20PFGI and the 70V28L15PF?
The main difference is access speed. The 70V28L20PFGI is a 20 ns dual-port SRAM, while the 70V28L15PF is a 15 ns dual-port SRAM. Both are 64K x 16 (1 Mbit) asynchronous dual-port static RAMs from the same 70V28L family, but the faster 15 ns grade offers a shorter access time for higher-performance applications.
Are the 70V28L20PFGI and 70V28L15PF pin-compatible?
Yes. Both devices are offered in the same 100-pin TQFP package and share the same pinout for the 70V28L family. This allows a common PCB footprint, but the 15 ns and 20 ns speed grades must still be validated against the target design's timing requirements.
What is the memory organization and density of these devices?
Both the 70V28L20PFGI and 70V28L15PF are 1 Mbit asynchronous dual-port SRAMs organized as 64K x 16 bits. They provide two independent ports with separate control, address, and I/O pins for simultaneous read/write access to the same memory array.
Can the 70V28L15PF be used as a drop-in replacement for the 70V28L20PFGI?
In many cases yes, because both are 64K x 16 dual-port SRAMs in the same 100-pin TQFP package with the same pinout. However, the 15 ns device has tighter timing specifications, so the system timing, hold times, and board-level signal integrity must be verified before substituting the faster part for the 20 ns part.
What supply voltage do the 70V28L20PFGI and 70V28L15PF require?
Both devices operate from a 3.3 V power supply (3.3 V ± 0.3 V, typically specified as 3.15 V to 3.6 V). They are low-power 3.3 V dual-port SRAMs and are not 5 V tolerant on all pins unless explicitly stated in the manufacturer datasheet.
Do these dual-port SRAMs support simultaneous read and write operations on both ports?
Yes. The 70V28L family is designed for true dual-port operation, allowing independent read and write access from both the left and right ports. When both ports access the same address simultaneously, on-chip arbitration logic resolves the contention and provides a BUSY flag or interrupt signal to the losing port.
What are the operating temperature ranges for the 70V28L20PFGI and 70V28L15PF?
The 70V28L20PFGI is specified for the industrial temperature range of -40°C to +85°C. The 70V28L15PF is typically specified for the commercial temperature range of 0°C to +70°C. The exact temperature grade should always be confirmed against the specific manufacturer datasheet for the ordered part number.
Which applications typically use the 70V28L20PFGI versus the 70V28L15PF?
The 70V28L15PF, with its faster 15 ns access time, is preferred for high-throughput applications such as network switches, routers, and real-time data buffering where low latency is critical. The 70V28L20PFGI, with a 20 ns access time and industrial temperature rating, is better suited for industrial control, instrumentation, and applications requiring wider temperature tolerance where 20 ns access is sufficient.