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Renesas 70V05L55PF
- Part No.:
- 70V05L55PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
70V05L55PF.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,299
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Product details
Overview
70V05L55PF from IDT (now Renesas) is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 55 ns maximum access time, industrial temperature range (–40°C to +85°C), and integrated semaphore/arbiter logic - used in real-time inter-processor communication systems requiring simultaneous read/write access to shared memory.
For engineers reviewing the 70V05L55PF datasheet, 70V05L55PF pinout, 70V05L55PF application, or 70V05L55PF equivalent, key selection considerations include BUSY arbitration timing (tAPS = 0 ns min), semaphore flag support (8 flags via A0–A2), and compatibility with master/slave cascading for 16-bit+ data bus expansion.
Technical Context
The 70V05L55PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, enabling concurrent reads/writes to any memory location without external logic. Its on-chip arbitration logic resolves contention using either address-match or CE-driven BUSY signaling.
It supports two distinct operational modes: RAM mode (CE = VIL, SEM = VIH) for memory access and semaphore mode (CE = VIH, SEM = VIL) for inter-port synchronization. The device uses TTL-compatible 3.3V ±0.3V supply and features push-pull BUSY/INT outputs - not open-drain - with no external pull-ups required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total); enables direct byte-wide interface without data masking logic |
| Access Time (tAA) | 55 ns max at VDD = 3.3V, TA = –40°C to +85°C; guarantees full-speed operation in industrial environments |
| Power Consumption | Active: 380 mW typ (IDT70V05L); Standby: 660 μW typ - suitable for low-duty-cycle embedded control |
| Operating Voltage | 3.3V ±0.3V; eliminates need for level shifters when interfacing with 3.3V microcontrollers/FPGAs |
| Temperature Range | Industrial: –40°C to +85°C; validated for use in motor drives, PLCs, and telecom line cards |
| Package | 64-pin TQFP (PNG64); 14 mm × 14 mm footprint with 0.5 mm pitch - compatible with standard SMT reflow profiles |
| Arbitration Support | Hardware semaphore (8 flags), BUSY flag arbitration, and interrupt flag - reduces firmware overhead in multi-CPU designs |
Pinout & Package
70V05L55PF is housed in a 64-pin thin quad flatpack (TQFP, package code PNG64), measuring 14 mm × 14 mm × 1.4 mm. All VDD pins require local 0.1 μF decoupling; all GND pins must be connected to solid ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left port address inputs | 13-bit address bus for 8K-word left-side access; no internal latching - requires stable setup/hold |
| A0R–A12R | Right port address inputs | Independent 13-bit right-side address bus; enables true parallel addressing without multiplexing |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit tri-state data bus; driven only when CEL = VIL and OEL = VIL - no external bus transceivers needed |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated from left port I/O; supports simultaneous read/write to same or different addresses |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deassertion places I/O in high-impedance state - critical for bus sharing |
| OEL / OER | Output enable (left/right) | Independent control of output drivers; allows one port to read while other writes without contention |
| R/WL / R/WR | Read/write control (left/right) | Active-low write; high = read - matches standard SRAM timing conventions for seamless FPGA/microcontroller integration |
| BUSYL / BUSYR | Busy flag (left/right) | Push-pull outputs (not open-drain); indicate arbitration status - used to stall host CPU during port conflict |
| SEML / SEMR | Semaphore enable (left/right) | Selects semaphore register access mode; enables hardware mutex for resource locking across CPUs |
| INTL / INTR | Interrupt flag (left/right) | Push-pull interrupt outputs; signal completion of semaphore operations or user-defined events |
| M/S | Master/Slave select | VIL configures as slave (BUSY input); VIH configures as master (BUSY output) - enables daisy-chained arbitration |
| VDD / VSS | Power / Ground | Four VDD and six VSS pins distributed across package - ensures low-noise power delivery and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent read/write access to same or different memory locations - eliminates software polling loops |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2; provides atomic lock/unlock without external logic or shared memory overhead |
| Master/slave cascading | Supports 16-bit+ word systems using M/S pin; eliminates discrete glue logic for bus-width expansion |
| Hardware BUSY arbitration | Detects port contention via address match or CE timing; asserts BUSY within 0 ns minimum (tAPS) to prevent data corruption |
| Interrupt generation | INTL/INTR outputs signal semaphore state changes or user-triggered events - enables event-driven firmware architecture |
| Low-power standby mode | 660 μW typical standby current (ISB) - ideal for battery-backed or energy-sensitive applications like remote I/O modules |
Applications
| Industrial PLC Communication | Multi-Core DSP Data Exchange |
|---|---|
|
Use Scenario: Two independent PLC CPUs share real-time I/O status and control commands via shared memory. IC Role / Device Role / Timing Role: Dual-port SRAM acts as coherency-enforced shared buffer; left port connects to main CPU, right port to motion controller. Use Value: 55 ns access time and hardware semaphore support eliminate race conditions during concurrent read/write of axis position data. |
Use Scenario: A primary DSP core offloads FFT processing to a secondary DSP, requiring synchronized transfer of coefficient and sample buffers. IC Role / Device Role / Timing Role: 70V05L55PF serves as zero-wait-state inter-processor mailbox; BUSY signals coordinate handshaking without software overhead. Use Value: Push-pull BUSY/INT outputs drive FPGA control logic directly - no external buffers or pull-ups required. |
| Telecom Line Card Buffering | Avionics Sensor Fusion Hub |
|
Use Scenario: Packet processor and network management MCU share configuration tables and statistics counters in carrier-grade line cards. IC Role / Device Role / Timing Role: Acts as non-blocking shared memory with interrupt-driven updates; INTL triggers config reload on change. Use Value: Industrial temperature rating (–40°C to +85°C) and 3.3V operation ensure reliability in uncooled telecom chassis. |
Use Scenario: Flight control computer aggregates inertial, GPS, and barometric sensor data across redundant processing channels. IC Role / Device Role / Timing Role: Provides deterministic, lock-free data exchange between safety-critical partitions using hardware semaphores. Use Value: On-chip arbitration logic meets DO-254 timing assurance requirements - no external arbitration IC needed. |
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, 3.3V, 100-pin TQFP - wider data bus but larger footprint and higher power (1.2 W active) | Best for 16-bit bus systems where pin count and board space allow; not drop-in for 8-bit interfaces | Select when system requires native 16-bit data path and can accommodate larger package and thermal budget |
| IDT70V25L25PF | 25 ns access, 4K × 16 organization, 3.3V, 64-pin TQFP - faster but half the density and different bus width | Suitable for latency-critical, lower-memory-footprint designs (e.g., real-time control loops) | Choose only if 25 ns timing is mandatory and 4K × 16 matches system bus architecture |
Compared with CY7C024AV-55AXC and IDT70V25L25PF, the 70V05L55PF uniquely balances 8K × 8 density, 55 ns speed, industrial temp rating, and 64-pin TQFP packaging - making it optimal for space-constrained, cost-sensitive dual-CPU systems requiring byte-level memory access.
Availability
70V05L55PF is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, and avionics sensor hubs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 70V05L55PF 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance memory, timing, and interface solutions for communications and industrial markets.
The 70V05L55PF belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where software-managed shared memory introduces unacceptable latency or complexity.
FAQ
What is the maximum operating temperature range for the 70V05L55PF?
The 70V05L55PF is rated for industrial temperature operation from –40°C to +85°C. This specification is verified per the DC and AC electrical characteristics tables in the official datasheet (Rev. DSC 2941/12, June 2019), and applies to all timing parameters including tAA = 55 ns max and BUSY arbitration timing.
Does the 70V05L55PF support true simultaneous read/write to the same memory address?
Yes, the 70V05L55PF supports true simultaneous reads of the same memory location from both ports. However, simultaneous write/write to the same address is resolved by hardware arbitration - the winning port completes the write, while the losing port asserts BUSY and must retry. This behavior is defined in the functional description and truth tables of the 70V05L55PF datasheet.
What is the function of the M/S pin on the 70V05L55PF?
On the 70V05L55PF, the M/S pin configures the device as either Master (M/S = VIH) or Slave (M/S = VIL). In Master mode, BUSYL and BUSYR are push-pull outputs; in Slave mode, they become inputs that inhibit writes when asserted. This enables hierarchical arbitration in multi-device systems - a core feature documented in the functional block diagram and pin descriptions.
How many semaphore flags does the 70V05L55PF provide, and how are they accessed?
The 70V05L55PF provides eight hardware semaphore flags, addressed via A0–A2 during semaphore mode (CE = VIH, SEM = VIL). Each flag is a single-bit register supporting atomic set/clear operations. This capability is explicitly detailed in Truth Table II and the Semaphore Read/Write Control section of the 70V05L55PF datasheet.
Is the 70V05L55PF pin-compatible with other members of the IDT70V05 family?
No - the 70V05L55PF (64-pin TQFP) is not pin-compatible with the 68-pin PLCC or PGA variants (e.g., 70V05L55PFI). Pin counts, layouts, and power/ground pin distributions differ significantly across packages. The 70V05L55PF datasheet confirms distinct pin configurations for PNG64 vs. PLG68 and G68-1 packages, requiring separate PCB layouts.
70V05L55PF 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)
70V05L55PF FAQ
1.How can I place an order for 70V05L55PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V05L55PF 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 70V05L55PF reliable?
The price and inventory of 70V05L55PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05L55PF is usually 5 days.
3.What payment methods are accepted for 70V05L55PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05L55PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V05L55PF?
70V05L55PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V05L55PF 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 70V05L55PF?
For technical support, including 70V05L55PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05L55PF requirements.
6.How does Aetrix verify that 70V05L55PF is sourced from the original manufacturer or authorized distributors?
All 70V05L55PF 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 70V05L55PF meets industry standards.
7.What is the process for return or replacement of 70V05L55PF?
All 70V05L55PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V05L55PF, 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 70V05L55PF part is unused and in its original packaging.
Return procedure for 70V05L55PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V05L55PF 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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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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