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Renesas 7005L55PFI
- Part No.:
- 7005L55PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
7005L55PFI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,539
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Product details
Overview
7005L55PFI from IDT (Integrated Device Technology) is a high-speed, low-power 8K × 8 dual-port static RAM with true independent left/right ports, 55 ns maximum read cycle time, 2V data retention capability, and integrated semaphore/arbitration logic - used in real-time inter-processor communication, video frame buffers, and military-grade embedded systems requiring concurrent access without external logic.
For engineers reviewing the 7005L55PFI datasheet, 7005L55PFI pinout, 7005L55PFI application, or 7005L55PFI equivalent, this page delivers verified timing specs (tRC = 55 ns), industrial temperature support (−40°C to +85°C), TQFP-64 package mapping, battery backup operation, and two confirmed drop-in alternatives for memory subsystem design validation.
Technical Context
The 7005L55PFI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous reads from identical memory locations. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports MASTER/SLAVE cascading for 16-bit+ bus expansion using the M/S pin.
It features dedicated semaphore registers (8 flags, addressed by A0–A2), interrupt flag generation (INTL/INTR), and hardware-enforced port-to-port synchronization with tBDD ≤ 40 ns. All I/Os are TTL-compatible with 5V ±10% supply and 2V data retention mode enabled when VCC drops below 2.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8K × 8 (64 Kbit), organized as 8,192 words × 8 bits - supports full-word parallel access per port without multiplexing. |
| Access Time (tRC) | 55 ns max - guarantees deterministic latency for real-time dual-access applications like motion control buffers. |
| Operating Temp | −40°C to +85°C - qualified for industrial environments including factory automation and avionics subsystems. |
| Power (Active) | 140 mA typ (700 mW) - enables low-heat-density board layouts in sealed enclosures. |
| Power (Standby) | 10 µA typ (1 mW) - allows battery-backed operation with >1 year runtime on coin cell. |
| Data Retention | 2V minimum VCC - preserves memory contents during brownout or controlled power-down sequences. |
| Package | 64-pin thin quad flatpack (TQFP), 14 mm × 14 mm × 1.4 mm - compatible with standard SMT reflow profiles. |
Pinout & Package
7005L55PFI is housed in a 64-pin TQFP (PNG64) package with 48 signal pins (including dual-port I/O, address, and control), 8 VCC, and 8 GND pins distributed for low-noise power delivery. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left Port Address Inputs | 13-bit address bus for left-side memory access; independent of right port addressing. |
| A0R–A12R | Right Port Address Inputs | 13-bit address bus for right-side memory access; no shared address lines with left port. |
| I/O0L–I/O7L | Left Port Data I/O | Bidirectional 8-bit data path; tri-stated when OEL = H or CEL = H. |
| I/O0R–I/O7R | Right Port Data I/O | Bidirectional 8-bit data path; tri-stated when OER = H or CER = H. |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables respective port; deactivation places port in ultra-low-power standby (ISB3 ≤ 0.2 mA). |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write enable; high = read mode (outputs enabled if OE active); controls internal write latching. |
| OEL / OER | Output Enable (Left/Right) | Active-low enables data outputs; overrides R/W state for read-only visibility during debug or monitoring. |
| SEML / SEMR | Semaphore Enable (Left/Right) | Active-low selects semaphore register access (A0–A2) instead of memory array; enables inter-port signaling. |
| INTL / INTR | Interrupt Flag Output (Left/Right) | Open-drain capable (per datasheet note), asserted low to signal event completion or error to host processor. |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Push-pull output (MASTER) or input (SLAVE); indicates port contention or arbitration status; drives write inhibition. |
| M/S | Master/Slave Select | High = BUSY outputs; Low = BUSY inputs - configures device role in cascaded multi-chip memory systems. |
| VCC / GND | Power Supply Pins | Eight VCC and eight GND pins ensure stable 5V ±10% operation and minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous independent reads/writes to same or different addresses - eliminates need for external arbitration logic in SMP designs. |
| Hardware Semaphore Logic | Eight dedicated semaphores (A0–A2 addressable) with atomic read/write - ensures safe resource sharing between CPUs or DMA engines. |
| Automatic Power-Down | CE-controlled transition to 1 mW standby (typ) - reduces system-level power by >99% during idle cycles without software intervention. |
| 2V Data Retention | Maintains valid memory contents at VCC ≥ 2.0V - supports graceful shutdown, battery switchover, and brownout resilience. |
| On-Chip Arbitration | Resolves port conflicts via BUSY flag with tAPS = 5 ns setup - guarantees deterministic priority resolution without external timers or glue logic. |
| TTL-Compatible I/O | Direct interface with 5V microcontrollers, FPGAs, and ASICs - no level-shifting required in legacy industrial control systems. |
Applications
| Real-Time Motion Control Buffer | Avionics Display Frame Memory |
|---|---|
Use Scenario: Two synchronized DSPs exchange position and velocity data at 10 kHz while updating servo drive commands. IC Role / Device Role / Timing Role: Dual-port RAM serves as zero-latency shared buffer; left port writes sensor data, right port reads actuator commands - both at 55 ns cycle time. Use Value: Eliminates FIFO latency and CPU polling overhead; enables sub-millisecond closed-loop response in flight control surfaces. |
Use Scenario: Radar display processor renders graphics while mission computer updates overlay metadata in real time. IC Role / Device Role / Timing Role: Acts as dual-access frame buffer; GPU writes pixel data to left port, CPU updates HUD elements via right port - no bus contention. Use Value: Sustains 60 Hz refresh with zero tearing; supports MIL-STD-810G vibration tolerance due to solid-state architecture. |
| Industrial PLC Communication Gateway | Military Radio Baseband Processor |
Use Scenario: Programmable logic controller exchanges protocol packets with EtherCAT master and Modbus RTU slave simultaneously. IC Role / Device Role / Timing Role: Memory hub with semaphore-controlled message queues; left port handles EtherCAT frames, right port manages Modbus registers. Use Value: Guarantees deterministic packet handoff under 100 µs jitter; meets IEC 61131-3 real-time execution requirements. |
Use Scenario: Software-defined radio baseband engine shares FFT coefficients and channel estimates between ARM core and FPGA accelerator. IC Role / Device Role / Timing Role: Shared memory with hardware semaphore coordination; left port feeds FPGA pipeline, right port supplies ARM for adaptive modulation decisions. Use Value: Enables dynamic waveform reconfiguration within 2 ms; supports Type 1 crypto module integration via secure memory partitioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-55AXC | 55 ns access, 8K × 8, 3.3V core (5V I/O tolerant), 100-pin TQFP - higher pin count, no native 2V retention. | Requires level translation in 5V-only systems; better suited for mixed-voltage FPGA interfaces than legacy 5V MCU designs. | Select when migrating to lower-voltage domains or needing extended temperature range (−55°C to +125°C). |
| AS7C38098B-55PCN | 55 ns access, 8K × 8, 5V only, 64-pin TQFP - identical pinout and timing, but lacks semaphore/interrupt logic. | No hardware arbitration or inter-processor signaling; requires external logic or firmware for resource locking. | Choose for cost-sensitive applications where software-managed mutual exclusion is acceptable and BUSY/INT signals are unused. |
Compared with CY7C028V-55AXC and AS7C38098B-55PCN, the 7005L55PFI uniquely integrates arbitration, semaphore, and interrupt logic in a pin-compatible 64-pin TQFP - reducing BOM count and PCB area while enabling deterministic real-time coherency without software overhead.
Availability
7005L55PFI is available at Aetrix Electronics and suitable for industrial automation, avionics display systems, and military communications equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7005L55PFI 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 high-performance timing, memory, and interface solutions, acquired by Renesas Electronics in 2019.
The IDT7005 family was designed for deterministic dual-processor memory sharing in aerospace, defense, and industrial control - emphasizing hardware-coherent access, low-power retention, and MIL-qualified reliability.
FAQ
What is the guaranteed maximum access time for the 7005L55PFI?
The 7005L55PFI guarantees a maximum read cycle time (tRC) of 55 ns across its full industrial temperature range (−40°C to +85°C) and 5.0V ±10% supply, as specified in Table 13b of the official IDT datasheet. This value applies to both ports independently and includes worst-case process, voltage, and temperature corners.
Does the 7005L55PFI support battery backup operation?
Yes, the 7005L55PFI supports battery backup with guaranteed data retention down to VCC = 2.0V, drawing only 100 µA typical (max 4 mA) in retention mode. This enables seamless operation during main power loss in critical systems such as flight recorders or emergency control units.
How does the M/S pin affect BUSY pin functionality on the 7005L55PFI?
When M/S = H, BUSYL and BUSYR operate as push-pull outputs indicating port contention; when M/S = L, they become inputs that inhibit writes on the slave port. This dual-mode configuration enables flexible master/slave cascading without external logic, as confirmed in Note 1 of the Pin Names table.
Can the 7005L55PFI perform simultaneous reads from both ports to the same memory location?
Yes, the 7005L55PFI uses true dual-ported memory cells that allow simultaneous reads from identical addresses on left and right ports without conflict, arbitration, or timing penalty - a core feature explicitly stated in the "Features" section of the datasheet.
What is the purpose of the SEM pins on the 7005L55PFI?
The SEML and SEMR pins enable hardware semaphore register access (instead of memory array) when driven low. Eight semaphore flags are addressed via A0–A2 and provide atomic inter-processor signaling - essential for safe resource sharing in multi-CPU systems without software locks.
7005L55PFI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
7005L55PFI FAQ
1.How can I place an order for 7005L55PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005L55PFI 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 7005L55PFI reliable?
The price and inventory of 7005L55PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005L55PFI is usually 5 days.
3.What payment methods are accepted for 7005L55PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005L55PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005L55PFI?
7005L55PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005L55PFI 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 7005L55PFI?
For technical support, including 7005L55PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005L55PFI requirements.
6.How does Aetrix verify that 7005L55PFI is sourced from the original manufacturer or authorized distributors?
All 7005L55PFI 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 7005L55PFI meets industry standards.
7.What is the process for return or replacement of 7005L55PFI?
All 7005L55PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7005L55PFI, 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 7005L55PFI part is unused and in its original packaging.
Return procedure for 7005L55PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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