Part A
70V27L20PFGI
미국 리사 전자 회사
- Lifecycle
- Active
- Stock
- 3315 PCS
- Package
- LQFP-100
- Series
- 기억력
Replacement verdict
Compatible functional replacement candidate
The 70V27L15PF8 is a compatible functional replacement candidate for the 70V27L20PFGI, sharing identical organization, package, and supply voltage characteristics while offering a faster access time. Designers should validate timing margins in their specific application before substituting.
Memory Organization
High match
Package Type
High match
Supply Voltage
High match
Access Time
Validation required
Parts at a glance
Part B
70V27L15PF8
미국 리사 전자 회사
- Lifecycle
- Active
- Stock
- 7911 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 | 70V27L20PFGI | 70V27L15PF8 | Why it matters |
|---|---|---|---|
| Access Time | 20 ns | 15 ns | Access time determines how quickly the memory responds to a read request; a faster access time can improve overall system performance and may be required for timing-critical designs. |
| Memory Type | SRAM (Dual-Port) | SRAM (Dual-Port) | The memory technology defines the fundamental behavior, interface, and application suitability; matching types ensures functional compatibility. |
| Memory Size | 32 Kbit | 32 Kbit | Memory density must match the system's storage requirements; a different size would require redesign or may not fit the intended address space. |
| Memory Organization | 2K x 16 | 2K x 16 | Organization defines the word width and depth, which must align with the system bus and addressing scheme for direct substitutability. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Operating voltage must be compatible with the rest of the system to avoid level-shifting or damage; identical ranges allow drop-in replacement. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Temperature range indicates the environments in which the device can reliably operate; matching ranges ensures the replacement meets the same environmental requirements. |
| Package / Mounting Type | TQFP / Surface Mount | TQFP / Surface Mount | Package and mounting must be physically compatible with the PCB footprint and assembly process for a direct board-level swap. |
| Pin Count | 100 | 100 | Pin count must match to ensure the device fits the existing socket or land pattern without mechanical or electrical mismatch. |
| Interface Type | Parallel (Dual-Port) | Parallel (Dual-Port) | The interface type determines how the memory connects to the host system; matching interfaces ensures protocol and signal compatibility. |
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 | 70V27L20PFGI | 70V27L15PF8 |
|---|---|---|
| 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 | 512Kb (32K x 16) | 512Kb (32K x 16) |
| Memory Interface | Parallel | Parallel |
| Write Cycle Time - Word Page | 20ns | 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 |
Frequently asked questions
What are the key differences between the 70V27L20PFGI and the 70V27L15PF8?
The primary difference is access time: the 70V27L20PFGI is rated at 20 ns, while the 70V27L15PF8 is rated at 15 ns. Both are 3.3V 32K x 16 dual-port static RAMs from the 70V27L family, but the faster 15 ns grade of the 70V27L15PF8 supports higher-speed system timing. Package and temperature grade may also differ between the two orderable part numbers.
Are the 70V27L20PFGI and 70V27L15PF8 functionally interchangeable?
Functionally, both devices are 32K x 16 dual-port SRAMs with the same memory organization and interface, so they are pin-compatible within the same package type. However, direct substitution requires verifying that the system timing margin supports the 20 ns access time of the 70V27L20PFGI if replacing the faster 15 ns part, and that the package, temperature grade, and operating conditions of each orderable part number match the target design.
What is the memory organization and density of these devices?
Both the 70V27L20PFGI and 70V27L15PF8 are 512 Kbit dual-port SRAMs organized as 32K x 16 bits. They provide two independent ports with separate address, data, and control lines, allowing simultaneous access from two system buses.
What supply voltage do the 70V27L20PFGI and 70V27L15PF8 require?
Both devices operate from a 3.3V nominal power supply, consistent with the 70V27L low-voltage family. Designers should confirm the exact recommended operating range and tolerance in the manufacturer datasheet for the specific orderable part number.
What does the speed grade suffix indicate in these part numbers?
In the 70V27L family, the numeric segment after the "L" denotes the maximum access time in nanoseconds. The 70V27L20PFGI has a 20 ns access time, and the 70V27L15PF8 has a 15 ns access time. Lower numbers indicate faster devices with shorter access times.
Can the 70V27L15PF8 be used to replace the 70V27L20PFGI in an existing design?
In many cases a faster speed grade such as the 70V27L15PF8 can replace a slower 20 ns device, provided the package, temperature grade, and pinout match. The system must still meet the timing requirements of the faster device, and the designer should verify all AC and DC specifications against the manufacturer datasheet before substitution.
Do these dual-port SRAMs support simultaneous read and write operations on both ports?
Yes. As dual-port SRAMs, the 70V27L20PFGI and 70V27L15PF8 provide two independent ports that can perform simultaneous read and write operations, subject to the arbitration and contention rules defined in the manufacturer datasheet. Designers must implement appropriate arbitration logic when both ports access the same memory location.
What package type is indicated by the "PF" in these part numbers?
The "PF" designation in both the 70V27L20PFGI and 70V27L15PF8 refers to the package style used by these orderable part numbers. The exact package outline, pin count, and thermal characteristics should be confirmed from the manufacturer datasheet or an authorized distributor listing for each specific part number.