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Renesas 70V24S55PFI
- Part No.:
- 70V24S55PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V24S55PFI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,751
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Product details
Overview
70V24S55PFI from Integrated Device Technology is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 55 ns maximum read cycle time, 3.3 V ±0.3 V single supply, and industrial temperature range (–40°C to +85°C). It supports full on-chip semaphore signaling and BUSY flag arbitration for real-time multi-processor interlocking in embedded control systems.
For engineers reviewing the 70V24S55PFI datasheet, 70V24S55PFI pinout, 70V24S55PFI application, or 70V24S55PFI equivalent, key selection criteria include its 84-pin PLCC package, 4K × 16-bit organization, 55 ns access timing, LVTTL-compatible I/O, and integrated port arbitration logic-critical for deterministic memory sharing between DSP and microcontroller subsystems.
Technical Context
The 70V24S55PFI implements fully asynchronous dual-port operation with separate address, control, and data buses per port. Its on-chip arbitration logic resolves simultaneous access contention via BUSY flag assertion and supports eight hardware semaphores addressed by A0–A2 for inter-processor synchronization.
It uses CMOS high-performance technology with TTL-level compatible inputs and outputs, operates at 3.3 V only, and features automatic power-down via chip enable (CE) with full standby current as low as 0.2 mA (typ.) under CMOS-level input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4K × 16-bit (64 Kbit), true dual-port SRAM |
| Access Time (tAA) | 55 ns max - defines minimum time from valid address to stable output data |
| Read Cycle Time (tRC) | 55 ns max - sets maximum sustained read throughput (18.2 MHz) |
| Supply Voltage | 3.3 V ±0.3 V - requires single LVTTL-compatible rail; no 5 V tolerance |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems |
| Package | 84-pin PLCC (PLG84) - surface-mount compatible with standard reflow profiles |
| Standby Current (ISB3) | 0.2 mA typ. - enables ultra-low-power sleep mode when both ports disabled |
Pinout & Package
70V24S55PFI is housed in an 84-pin Plastic Leaded Chip Carrier (PLG84) measuring approximately 1.15 in × 1.15 in × 0.17 in, with all VDD pins requiring connection to 3.3 V and all VSS pins tied to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left port address inputs | 12-bit address bus for left-side memory access (A12L is NC) |
| A0R–A11R | Right port address inputs | 12-bit address bus for right-side memory access (A12R is NC) |
| I/O0L–I/O7L, I/O0R–I/O7R | Lower-byte bidirectional data | 8-bit lower byte per port; controlled by LBL/LBR |
| I/O8L–I/O15L, I/O8R–I/O15R | Upper-byte bidirectional data | 8-bit upper byte per port; controlled by UBL/UBR |
| CEL, CER | Chip enable (active low) | Independent enable per port; disables internal circuitry to reduce power |
| OEL, OER | Output enable (active low) | Controls tri-state of I/O drivers; allows shared bus operation |
| R/WL, R/WR | Read/write control (active low) | Determines direction of data transfer on enabled port |
| SEML, SEMR | Semaphore enable (active low) | Enables access to eight hardware semaphore flags via A0–A2 |
| BUSYL, BUSYR | Busy flag (push-pull) | Indicates port contention; BUSYL is output on Master, input on Slave |
| INTL, INTR | Interrupt flag (push-pull) | Signals completion of semaphore write or user-defined event |
| M/S | Master/Slave select | VIL configures device as Slave (BUSY input); VIH as Master (BUSY output) |
| VDD, VSS | Power and ground | Multiple dedicated pins ensure stable 3.3 V distribution and low-noise grounding |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent reads/writes to same location without external arbitration logic |
| Hardware semaphore support | Eight dedicated flags accessible via A0–A2, eliminating software mutex overhead in RTOS environments |
| On-chip port arbitration | Automatic BUSY flag assertion prevents data corruption during concurrent access attempts |
| Separate upper/lower byte control | UBL/UBR and LBL/LBR enable 8-bit sub-word transfers, reducing bus turnaround latency |
| Low-power standby modes | ISB3 = 0.2 mA typ. allows energy-efficient idle states in battery-backed or fanless systems |
Applications
| Industrial PLC Controller | DSP-Microcontroller Co-Processing |
|---|---|
Use Scenario: Real-time I/O scanning and logic execution across two synchronized processing domains. IC Role / Device Role / Timing Role: Shared memory buffer with deterministic arbitration for scan-cycle handshaking. Use Value: 55 ns access ensures <1 µs inter-processor data exchange, meeting 1 ms PLC scan deadlines. | Use Scenario: Offloading signal processing tasks from main MCU to dedicated DSP while maintaining coherent state. IC Role / Device Role / Timing Role: Dual-access scratchpad memory enabling zero-copy data passing between cores. Use Value: Hardware semaphores eliminate polling delays, reducing inter-core latency by >90% vs. software flags. |
| Avionics Data Concentrator | Medical Imaging Frame Buffer |
Use Scenario: Aggregating sensor telemetry from multiple ARINC-429 receivers into a central flight management unit. IC Role / Device Role / Timing Role: Synchronized dual-port interface bridging legacy serial receivers and modern ARM-based FMC. Use Value: Industrial temp rating (–40°C to +85°C) and 84-pin PLCC ensure reliability in uncontrolled avionics bays. | Use Scenario: Storing raw pixel data from parallel ADC channels during CT/MRI acquisition bursts. IC Role / Device Role / Timing Role: High-bandwidth, low-latency frame buffer decoupling analog front-end from digital reconstruction pipeline. Use Value: 55 ns read cycle supports >18 MHz sustained throughput, sufficient for 12-bit 1024×1024 frame capture at 15 fps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-55AXI | 4K × 16-bit, 55 ns, 3.3 V, 100-pin TQFP - lacks integrated semaphore logic and BUSY arbitration | Requires external logic for inter-processor coordination; suitable only where software arbitration is acceptable | Select when board space permits larger TQFP and system firmware can manage mutual exclusion |
| IDT70V25S55PF | 4K × 16-bit, 55 ns, 3.3 V, 100-pin TQFP - identical timing and feature set but different package and thermal profile | Same functional behavior; differs only in mechanical form factor and industrial qualification scope | Choose for drop-in replacement where 100-pin TQFP layout exists and PLCC footprint is unavailable |
Compared with CY7C1362BV33-55AXI, the 70V24S55PFI delivers hardware-enforced synchronization critical for hard real-time systems; versus IDT70V25S55PF, it offers identical electrical performance in a smaller 84-pin PLCC package optimized for legacy industrial PCBs.
Availability
70V24S55PFI is available at Aetrix Electronics and suitable for industrial PLC controllers, avionics data concentrators, and medical imaging subsystems requiring stable component supply across extended product lifecycles.
Supply support for 70V24S55PFI 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance silicon solutions.
The IDT70V24 family was designed specifically for deterministic, low-latency memory sharing in dual-processor embedded systems-targeting industrial automation, aerospace, and medical equipment where hardware arbitration and industrial temperature operation are mandatory.
FAQ
What is the memory organization and total capacity of the 70V24S55PFI?
The 70V24S55PFI is a 4K × 16-bit true dual-port static RAM, providing 64 Kbits (8 Kbytes) of addressable memory. Each port accesses the same memory array independently, supporting simultaneous reads or writes without contention-induced delays when properly arbitrated via BUSY or semaphore signals.
Does the 70V24S55PFI support both commercial and industrial temperature ranges?
The 70V24S55PFI is specified for the industrial temperature range of –40°C to +85°C only, as indicated by the "I" suffix in its part number. It is not rated for commercial operation (0°C to +70°C) and must be used within its qualified industrial envelope for guaranteed timing and reliability.
How does the BUSY flag function in master/slave configurations with the 70V24S55PFI?
In master configuration (M/S = VIH), the 70V24S55PFI asserts BUSYL as an output to signal port contention; in slave mode (M/S = VIL), BUSYL serves as an input to receive BUSY status from the master. This enables hierarchical arbitration in cascaded dual-port memory systems without external logic.
Can the 70V24S55PFI operate from a 5 V supply?
No, the 70V24S55PFI is strictly a 3.3 V device with absolute maximum VDD of 3.6 V. It is LVTTL-compatible only and lacks 5 V tolerance. Applying 5 V will exceed absolute maximum ratings and cause permanent damage. A regulated 3.3 V ±0.3 V supply is mandatory.
What is the purpose of the semaphore functionality in the 70V24S55PFI?
The 70V24S55PFI integrates eight hardware semaphore flags accessible via A0–A2. When SEM is active low, I/O0 writes to or reads from a selected flag, enabling atomic lock/unlock operations between processors-eliminating race conditions without CPU intervention or software overhead.
70V24S55PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- 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 (14x14)
70V24S55PFI FAQ
1.How can I place an order for 70V24S55PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V24S55PFI 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 70V24S55PFI reliable?
The price and inventory of 70V24S55PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V24S55PFI is usually 5 days.
3.What payment methods are accepted for 70V24S55PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V24S55PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V24S55PFI?
70V24S55PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V24S55PFI 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 70V24S55PFI?
For technical support, including 70V24S55PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V24S55PFI requirements.
6.How does Aetrix verify that 70V24S55PFI is sourced from the original manufacturer or authorized distributors?
All 70V24S55PFI 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 70V24S55PFI meets industry standards.
7.What is the process for return or replacement of 70V24S55PFI?
All 70V24S55PFI units undergo pre-shipment inspection (PSI). If there is an issue with 70V24S55PFI, 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 70V24S55PFI part is unused and in its original packaging.
Return procedure for 70V24S55PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V24S55PFI Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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