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Renesas 70V24L55PFI8
- Part No.:
- 70V24L55PFI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24L55PFI8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,117
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Product details
Overview
70V24L55PFI8 from Integrated Device Technology (IDT) is an industrial-grade, 4K x 16-bit true dual-port static RAM with independent left/right asynchronous ports, 55 ns maximum read cycle time, 3.3 V single supply operation, and integrated semaphore arbitration logic. It enables simultaneous CPU/DSP or processor/FPGA memory access in real-time control systems.
For engineers reviewing the 70V24L55PFI8 datasheet, 70V24L55PFI8 pinout, 70V24L55PFI8 application, or 70V24L55PFI8 equivalent, key selection criteria include its 84-pin PLCC package, -40°C to +85°C temperature rating, low 660 µW standby power, and full hardware semaphore support for inter-processor synchronization without external logic.
Technical Context
This device implements fully asynchronous dual-port architecture with separate address, data, and control buses per port-enabling concurrent reads/writes to any memory location. Its on-chip arbitration logic resolves port contention via BUSY flag signaling and supports MASTER/SLAVE cascading for wider bus expansion.
The 70V24L55PFI8 integrates dedicated semaphore registers (A0–A2 addressed, 8 flags), accessed via SEM pin control, enabling atomic test-and-set operations between ports. All I/Os are LVTTL-compatible, and power management includes CE-controlled automatic entry into ultra-low-power standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K x 16-bit (64 Kbit), true dual-port SRAM with independent left/right ports |
| Access Time (tAA) | 55 ns max - defines worst-case delay from valid address to stable output data |
| Read Cycle Time (tRC) | 55 ns max - minimum interval between successive read operations on same port |
| Standby Current (ISB3) | 660 µW typ. at 3.3 V - enables ultra-low-power retention during system sleep modes |
| Supply Voltage | 3.3 V ±0.3 V - compatible with modern LVTTL logic families and eliminates level-shifting needs |
| Operating Temperature | -40°C to +85°C - qualified for industrial embedded control and motor drive applications |
| Package | 84-pin PLCC (PLG84) - through-hole mounting with 1.15" × 1.15" footprint, suitable for high-reliability PCBs |
Pinout & Package
84-pin Plastic Leaded Chip Carrier (PLG84) package, body size ≈ 1.15 in × 1.15 in × 0.17 in. All VDD pins require connection to 3.3 V supply; all VSS pins must be grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Active-low enable per port; disables I/O drivers and reduces current draw when deasserted |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low signal determining direction of data transfer on respective port |
| OEL / OER | Output Enable (Left/Right) | Active-low control for tri-state output drivers; allows shared bus operation |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select (Left/Right) | Enable 8-bit sub-word access; supports multiplexed bus compatibility and partial writes |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates semaphore register access mode (I/O0 used for write, all I/Os for read) |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Open-drain push-pull output indicating port contention; used for MASTER/SLAVE arbitration |
| INTL / INTR | Interrupt Flag (Left/Right) | Push-pull output asserting on semaphore flag change or user-defined event |
| A0L–A11L, A0R–A11R | Address Inputs (Left/Right) | 12-bit address bus per port; A12 is No Connect per datasheet Note 1 |
| I/O0L–I/O15L, I/O0R–I/O15R | Data I/O (Left/Right) | 16-bit bidirectional data bus per port; byte-selectable via UBL/LBL and UBR/LBR |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent read/write access to same memory location by two processors without external arbitration logic |
| Hardware Semaphore Logic | Eight dedicated, addressable (A0–A2) semaphore flags with atomic read-modify-write capability for deterministic inter-processor synchronization |
| MASTER/SLAVE Cascading Support | Configurable M/S pin enables multi-device 32-bit+ memory expansion with automatic BUSY flag coordination |
| Ultra-Low Standby Power | 660 µW typical consumption in full standby (ISB3) - critical for battery-backed or energy-constrained industrial systems |
| LVTTL-Compatible I/O | 3.3 V single-supply interface eliminates need for voltage translation in mixed-voltage designs |
Applications
| Industrial Motion Controller | Digital Signal Processor Interface |
|---|---|
Use Scenario: Real-time coordination between motion control CPU and FPGA-based servo driver logic sharing position/trajectory buffers. IC Role / Device Role / Timing Role: Dual-port SRAM acts as coherently accessible shared memory with hardware semaphore for atomic command handoff and status reporting. Use Value: Eliminates software polling or external arbitration ICs; 55 ns access ensures deterministic response within tight motion loop timing budgets. | Use Scenario: High-speed data exchange between DSP core and peripheral acquisition engine in radar or medical imaging front-end. IC Role / Device Role / Timing Role: Provides non-blocking, low-latency buffer for streaming ADC samples and processed FFT results between asymmetric processing domains. Use Value: Asynchronous dual-port operation prevents pipeline stalls; 16-bit width matches common DSP data paths without glue logic. |
| FPGA Configuration Manager | Redundant Safety PLC Memory |
Use Scenario: Storing configuration bitstreams and runtime parameters accessible concurrently by host microcontroller and reconfigurable FPGA fabric. IC Role / Device Role / Timing Role: Acts as persistent, fast-access configuration repository with semaphore-protected update protocol to prevent corruption during partial reconfiguration. Use Value: Enables safe field-upgrade capability; PLCC package provides mechanical robustness for long-life industrial deployments. | Use Scenario: Fault-tolerant memory storage for safety-critical logic states in SIL2/3 programmable logic controllers requiring dual-channel verification. IC Role / Device Role / Timing Role: Serves as mirrored, independently accessible memory bank where primary and backup CPUs validate state consistency via semaphore handshake. Use Value: Hardware-enforced atomic semaphore operations guarantee race-free cross-checking; -40°C to +85°C rating ensures reliability in harsh cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-55AXC | 55 ns access, 4K × 16, 3.3 V, 100-pin TQFP - higher pin count, no PLCC option | Requires PCB redesign for surface-mount assembly; lacks native MASTER/SLAVE BUSY coordination logic | Select if board uses TQFP footprint and requires higher I/O drive strength (24 mA vs. 4 mA) |
| IDT70V25L55PF | Same 55 ns speed but 8K × 18 organization; 100-pin TQFP; commercial temp only (0°C to +70°C) | Not rated for industrial temperature range; larger memory depth may increase cost and layout complexity unnecessarily | Choose only if 8K × 18 capacity is required and ambient operating temperature stays within commercial range |
Compared with CY7C024AV-55AXC and IDT70V25L55PF, the 70V24L55PFI8 uniquely combines industrial temperature qualification, 84-pin PLCC packaging for legacy/reflow-tolerant designs, and integrated MASTER/SLAVE arbitration - making it optimal for retrofit, high-reliability, or mechanically constrained applications where drop-in replacement isn't required but functional fit is critical.
Availability
70V24L55PFI8 is available at Aetrix Electronics and suitable for industrial motion controllers, DSP interface buffers, FPGA configuration managers, and redundant safety PLCs requiring stable component supply across extended product lifecycles.
Supply support for 70V24L55PFI8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Integrated Device Technology (IDT), now part of Renesas Electronics, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.
The IDT70V24 family delivers low-power, high-speed dual-port SRAMs optimized for real-time embedded systems requiring deterministic inter-processor communication and hardware-accelerated synchronization.
FAQ
What is the maximum operating temperature range for the 70V24L55PFI8?
The 70V24L55PFI8 is specified for industrial temperature operation from -40°C to +85°C. This rating is confirmed in the Absolute Maximum Ratings table and Operating Conditions section of the official IDT datasheet DSC-5624/10, making it suitable for deployment in motor drives, factory automation, and outdoor industrial equipment where ambient thermal stress is significant.
Does the 70V24L55PFI8 support true simultaneous read operations on both ports?
Yes, the 70V24L55PFI8 implements true dual-port SRAM architecture allowing independent, fully asynchronous reads from both left and right ports-even to the same memory address-without contention or additional arbitration circuitry. This capability is explicitly stated in the Features section and verified by the Functional Block Diagram showing parallel I/O and address paths.
How does the semaphore function work on the 70V24L55PFI8?
The 70V24L55PFI8 includes eight hardware semaphore flags accessed via A0–A2 addressing and controlled by the SEML/SEMR pins. When SEM is asserted low, I/O0 writes to the selected flag; all I/O lines (I/O0–I/O15) read its value. This enables atomic test-and-set operations essential for inter-processor synchronization without software overhead or race conditions.
What is the standby power consumption of the 70V24L55PFI8?
The 70V24L55PFI8 achieves 660 µW typical standby power (ISB3) when both ports are disabled with CMOS-level inputs. This value is documented in Table 09b under "ISB3 Full Standby Current (Both Ports – CMOS Level Inputs)" for the 70V24L variant at VDD = 3.3 V and TA = +25°C, confirming its suitability for low-energy industrial systems.
Is the 70V24L55PFI8 pin-compatible with other members of the IDT70V24 family?
Yes, the 70V24L55PFI8 shares identical 84-pin PLCC pinout with all IDT70V24 variants (e.g., 70V24L15, 70V24L25), including identical pin functions, power/ground locations, and NC assignments (A12 is No Connect per datasheet Note 1). Speed grade differences (15/25/35/55 ns) do not affect pin compatibility or electrical interface behavior.
70V24L55PFI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 4K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP
70V24L55PFI8 FAQ
1.How can I place an order for 70V24L55PFI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24L55PFI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 70V24L55PFI8 reliable?
The price and inventory of 70V24L55PFI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24L55PFI8 is usually 5 days.
3.What payment methods are accepted for 70V24L55PFI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24L55PFI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24L55PFI8?
70V24L55PFI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24L55PFI8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 70V24L55PFI8?
For technical support, including 70V24L55PFI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24L55PFI8 requirements.
6.How does Aetrix verify that 70V24L55PFI8 is sourced from the original manufacturer or authorized distributors?
All 70V24L55PFI8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 70V24L55PFI8 meets industry standards.
7.What is the process for return or replacement of 70V24L55PFI8?
All 70V24L55PFI8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V24L55PFI8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 70V24L55PFI8 part is unused and in its original packaging.
Return procedure for 70V24L55PFI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24L55PFI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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