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Renesas 70V05S55PF
- Part No.:
- 70V05S55PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
70V05S55PF.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,847
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Product details
Overview
70V05S55PF from IDT is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 55 ns maximum access time, TTL-compatible I/O, and full on-chip semaphore and interrupt support - used in real-time inter-processor communication, video frame buffers, and industrial motion control systems.
For engineers reviewing the 70V05S55PF datasheet, 70V05S55PF pinout, 70V05S55PF application, or 70V05S55PF equivalent, key selection considerations include bus arbitration latency, BUSY flag timing under address contention, master/slave cascading capability, and industrial temperature operation (–40°C to +85°C).
Technical Context
The 70V05S55PF implements fully asynchronous dual-port architecture with separate address, data, and control buses per port, enabling simultaneous read/write access to any memory location without external logic. It integrates hardware semaphore registers (8 flags), interrupt generation, and port-to-port arbitration via BUSY signaling.
Its MASTER/SLAVE configuration uses the M/S pin to define BUSY directionality: when M/S = VIH, BUSYL/BUSYR are outputs indicating port contention; when M/S = VIL, they become inputs for slave-side write inhibition. Semaphore access requires CE = VIH and SEM = VIL, while RAM access requires CE = VIL and SEM = VIH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 (64 Kbit), two independent 13-bit address spaces (A0–A12) |
| Access Time (tAA) | 55 ns max - guarantees valid data within 55 ns after stable address and CE assertion |
| Supply Voltage | 3.3 V ± 0.3 V - single-supply TTL-compatible operation, no level-shifting required |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Power Consumption | Active: 380 mW typ. (at 55 ns); Standby: 660 μW typ. - enables low-power idle states |
| Package | 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm - surface-mount compatible with automated assembly |
| Port Interface | Separate I/O0–I/O7, CE/OE/R/W, BUSY, INT, SEM per port - eliminates bus contention logic |
Pinout & Package
70V05S55PF is housed in a 64-pin thin quad flatpack (TQFP) package (PNG64), with 48 signal pins (including dual-port I/O, address, control), 8 VDD, and 8 VSS pins distributed for low-noise power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left-port address inputs | 13-bit address bus for left port; supports full 8K addressing independently of right port |
| A0R–A12R | Right-port address inputs | 13-bit address bus for right port; fully asynchronous with left port |
| I/O0L–I/O7L | Left-port bidirectional data | 8-bit data path; tri-stated when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right-port bidirectional data | 8-bit data path; tri-stated when OER = VIH or CER = VIH |
| CEL / CER | Chip enable (left/right) | Active-low enables memory access; controls active/standby current draw per port |
| OEL / OER | Output enable (left/right) | Active-low enables data output drivers; allows read-only mode without disabling chip |
| R/WL / R/WR | Read/write control (left/right) | High = read, Low = write; determines data flow direction on I/O bus |
| SEML / SEMR | Semaphore enable (left/right) | Active-high selects semaphore register access instead of memory array |
| INTL / INTR | Interrupt flag (left/right) | Open-drain push-pull output signals interrupt event (e.g., semaphore set/clear) |
| BUSYL / BUSYR | Bus arbitration flag (left/right) | When M/S = VIH: output indicates port contention; when M/S = VIL: input inhibits writes |
| M/S | Master/Slave select | VIH configures device as master (BUSY outputs); VIL configures as slave (BUSY inputs) |
| VDD / VSS | Power / ground | Eight VDD and eight VSS pins minimize IR drop and switching noise across high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads/writes to same address without external arbitration logic |
| On-chip semaphore logic | Eight dedicated hardware semaphore flags (addressed by A0–A2) for inter-process synchronization |
| Hardware port arbitration | BUSY flag asserts automatically during address contention, eliminating software polling overhead |
| Master/Slave cascading | Supports 16-bit+ data bus expansion using M/S pin; no glue logic needed for multi-device systems |
| Interrupt generation | Asynchronous INTL/INTR outputs signal semaphore events or write completions to host processors |
| Low standby power | 660 μW typical standby current enables battery-backed or energy-sensitive applications |
Applications
| Industrial Motion Control | Real-Time Inter-Processor Communication |
|---|---|
|
Use Scenario: Coordinating servo drive commands and feedback between FPGA-based motion controller and DSP-based trajectory planner. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared command/status buffer with deterministic 55 ns access, enabling sub-microsecond handshaking. Use Value: Eliminates FIFO latency and software synchronization overhead, ensuring jitter-free position loop execution. |
Use Scenario: Exchanging sensor fusion data between ARM Cortex-A9 application processor and Cortex-M4 real-time co-processor in autonomous mobile robot. IC Role / Device Role / Timing Role: Provides non-blocking memory space where both processors read/write concurrently using semaphore-protected regions. Use Value: Reduces inter-core communication latency by >70% versus mailbox-based software protocols. |
| Video Frame Buffering | Digital Signal Processing Pipeline |
|
Use Scenario: Storing one video frame (640×480×8-bit) for real-time overlay processing in broadcast-grade camera system. IC Role / Device Role / Timing Role: Left port accepts pixel stream from image sensor at 27 MHz; right port feeds processed pixels to encoder at independent rate. Use Value: Enables seamless frame capture and encode without line buffering or external SDRAM controller. |
Use Scenario: Holding intermediate FFT coefficients between pipeline stages in radar signal processor using multiple ADSP-214xx DSPs. IC Role / Device Role / Timing Role: Acts as coefficient/data exchange buffer with hardware semaphore coordination between adjacent DSPs. Use Value: Prevents pipeline stalls during coefficient updates; maintains sustained 1.2 GFLOPS throughput. |
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, 8K × 16 organization, 3.3 V supply, 100-pin TQFP - wider data bus but larger footprint | Requires external byte-enable logic for 8-bit systems; lacks integrated interrupt flag | Select when 16-bit data path is needed and PCB area permits larger package |
| IS61LV5128AL-10TLI | 10 ns access, 64K × 8 organization, 3.3 V supply, 44-pin SOJ - single-port only, no BUSY/SEM/INT | No hardware arbitration or inter-processor signaling; requires external logic for dual-access emulation | Select only for cost-sensitive, non-concurrent access use cases where arbitration is handled in firmware |
Compared with CY7C024AV-55AXC and IS61LV5128AL-10TLI, the 70V05S55PF uniquely delivers true dual-port operation with integrated arbitration, semaphore, and interrupt in a compact 64-pin TQFP - reducing BOM count and PCB complexity in real-time embedded systems.
Availability
70V05S55PF is available at Aetrix Electronics and suitable for industrial motion control, real-time inter-processor communication, and video frame buffering requiring stable component supply across extended product lifecycles.
Supply support for 70V05S55PF 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
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions, now part of Renesas Electronics.
The 70V05S55PF belongs to IDT's legacy high-speed dual-port SRAM family, designed specifically for deterministic, low-latency inter-processor data exchange in industrial automation, test equipment, and digital imaging systems.
FAQ
What is the maximum operating frequency supported by the 70V05S55PF?
The 70V05S55PF does not specify a clock frequency because it is an asynchronous SRAM. Its performance is defined by access time: 55 ns maximum tAA ensures reliable operation in systems where address and control setup/hold times meet datasheet requirements - typically supporting effective data rates up to ~12 MHz in burst-read configurations. The 70V05S55PF achieves this without internal clocking circuitry.
How does the BUSY arbitration mechanism work on the 70V05S55PF?
The 70V05S55PF asserts BUSYL or BUSYR when both ports attempt access to the same memory address within the tAPS window (5 ns min). When configured as master (M/S = VIH), BUSY outputs indicate contention; as slave (M/S = VIL), BUSY inputs disable writes. This hardware arbitration prevents data corruption without CPU intervention - a core function of the 70V05S55PF.
Can the 70V05S55PF be used in a 16-bit data bus configuration?
Yes - the 70V05S55PF supports 16-bit expansion via master/slave cascading. Two devices can be connected with M/S tied high on one (master) and low on the other (slave), sharing BUSY lines and using external logic to combine I/O0–I/O7 into a 16-bit path. This capability is explicitly documented for the 70V05S55PF and eliminates need for discrete bus transceivers.
What is the role of the SEM pin on the 70V05S55PF?
The SEM (semaphore) pin on the 70V05S55PF enables access to eight dedicated hardware semaphore registers. When SEM = VIH and CE = VIL, the device operates as standard SRAM; when SEM = VIL and CE = VIH, the I/O bus maps to semaphore flags (addressed by A0–A2). This dual-mode operation allows the 70V05S55PF to coordinate resource access between processors without external latches or software locks.
Does the 70V05S55PF support industrial temperature range operation?
Yes - the 70V05S55PF is rated for –40°C to +85°C operation, with all AC/DC specifications guaranteed across this range. The "S" in the part number denotes the industrial-grade speed/power variant, and the "55" specifies 55 ns access time. This makes the 70V05S55PF suitable for deployment in factory automation, transportation, and outdoor embedded systems without thermal derating.
70V05S55PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-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:
- 8K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
70V05S55PF FAQ
1.How can I place an order for 70V05S55PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V05S55PF 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 70V05S55PF reliable?
The price and inventory of 70V05S55PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05S55PF is usually 5 days.
3.What payment methods are accepted for 70V05S55PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05S55PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V05S55PF?
70V05S55PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V05S55PF 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 70V05S55PF?
For technical support, including 70V05S55PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05S55PF requirements.
6.How does Aetrix verify that 70V05S55PF is sourced from the original manufacturer or authorized distributors?
All 70V05S55PF 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 70V05S55PF meets industry standards.
7.What is the process for return or replacement of 70V05S55PF?
All 70V05S55PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V05S55PF, 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 70V05S55PF part is unused and in its original packaging.
Return procedure for 70V05S55PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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