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Renesas 70V05L25PF8
- Part No.:
- 70V05L25PF8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 64-LQFP
- Datasheet:
-
70V05L25PF8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,681
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Product details
Overview
IDT70V05L25PF8 from Renesas Electronics (formerly IDT) is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 25 ns maximum access time, industrial temperature range (−40°C to +85°C), and integrated semaphore and interrupt logic - used in real-time inter-processor communication, FPGA co-processor buffering, and legacy bus arbitration systems.
For engineers reviewing the IDT70V05L25PF8 datasheet, IDT70V05L25PF8 pinout, IDT70V05L25PF8 application, or IDT70V05L25PF8 equivalent, key selection considerations include dual-port contention arbitration behavior, BUSY flag timing under M/S = VIH configuration, semaphore address decoding (A0–A2), and compatibility with 3.3V TTL-level control buses in deterministic embedded systems.
Technical Context
The IDT70V05L25PF8 implements fully asynchronous dual-port operation with separate address, data, and control buses per port (left: A0L–A12L, I/O0L–I/O7L; right: A0R–A12R, I/O0R–I/O7R), enabling simultaneous read/write to the same memory location only when BUSY arbitration resolves contention. Its on-chip hardware semaphore logic uses dedicated SEM pins and A0–A2 addressing for eight shared flags.
Port arbitration relies on either address-match timing (tAPS) or CE-edge timing (tBAC/tBDC) to assert BUSY outputs; interrupt generation is edge-triggered via INTL/INTR pins upon write to designated addresses, with interrupt clear requiring explicit read of the same address. The device supports MASTER/SLAVE cascading via M/S pin for 16-bit+ bus expansion without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total), two independent 8-bit ports |
| Access Time (max) | 25 ns - guarantees worst-case read latency under industrial conditions (−40°C to +85°C, VDD = 3.3V ±0.3V) |
| Supply Voltage | 3.3 V ±0.3 V - single TTL-compatible rail; no 5V or mixed-voltage support |
| Active Power (typ) | 380 mW - enables low-heat operation in dense PCB layouts without forced cooling |
| Standby Power (typ) | 660 μW - allows deep power-down during idle cycles in battery-backed systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial automation, motor control, and transportation electronics |
| Package | 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm body - surface-mount compatible with standard reflow profiles |
Pinout & Package
Package: 64-pin thin quad flatpack (TQFP), PN64, 14 mm × 14 mm × 1.4 mm body. 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 |
|---|---|---|
| CEL / CER | Chip Enable (Left/Right) | Asynchronous active-low port enable; disables I/O drivers and reduces current draw when deasserted |
| OEL / OER | Output Enable (Left/Right) | Controls tri-state output drivers independently per port; does not affect internal memory state |
| R/WL / R/WR | Read/Write Control (Left/Right) | Active-low write strobe; HIGH = read, LOW = write - determines direction of data flow on I/O bus |
| SEML / SEMR | Semaphore Enable (Left/Right) | Activates semaphore register access (A0–A2) when CE is HIGH and SEM is LOW; isolates semaphore from main array |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Push-pull output (MASTER) or input (SLAVE); signals port contention during simultaneous access to same address |
| INTL / INTR | Interrupt Flag (Left/Right) | Open-drain capable push-pull output; asserts on write to interrupt-set address, clears on read of same address |
| M/S | Master/Slave Select | VIL configures device as SLAVE (BUSY inputs); VIH configures as MASTER (BUSY outputs) - enables daisy-chain arbitration |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables concurrent read/write operations from independent controllers without software coordination or external arbitration logic |
| Hardware semaphore support | Eight dedicated flags accessed via A0–A2 and SEM pin; eliminates need for atomic test-and-set routines in multi-CPU systems |
| On-chip BUSY arbitration | Automatic resolution of port contention using address-match (tAPS) or CE-edge (tBAC) timing - prevents data corruption during simultaneous writes |
| Interrupt generation logic | Dedicated INTL/INTR outputs trigger on write to user-defined addresses; simplifies event-driven synchronization between processors |
| MASTER/SLAVE cascading | Single M/S pin configures device for 16-bit+ data bus expansion; eliminates glue logic when stacking multiple IDT70V05L devices |
Applications
| Industrial PLC Backplane Buffer | FPGA-CPU Co-Processor Interface |
|---|---|
|
Use Scenario: Real-time data exchange between PLC CPU and motion control module over parallel backplane bus. IC Role / Device Role / Timing Role: Dual-port SRAM acts as deterministic handshake buffer; left port connects to CPU bus, right port to motion ASIC; BUSY flags prevent race conditions during parameter updates. Use Value: 25 ns access ensures sub-microsecond response to servo position commands; integrated semaphores eliminate polling overhead in cyclic executive firmware. |
Use Scenario: High-throughput streaming interface between Xilinx FPGA fabric and ARM Cortex-A9 application processor. IC Role / Device Role / Timing Role: IDT70V05L25PF8 serves as zero-wait-state FIFO buffer; FPGA writes image metadata to left port while CPU reads via right port with interrupt notification. Use Value: Hardware interrupt (INTL/INTR) replaces costly DMA polling; 380 mW active power enables sustained 50 MB/s throughput without thermal throttling. |
| Legacy Bus Arbitration Bridge | Redundant Controller Synchronization |
|
Use Scenario: Interfacing legacy 8-bit microcontrollers (e.g., 8051 derivatives) with modern 32-bit host via shared memory. IC Role / Device Role / Timing Role: IDT70V05L25PF8 provides voltage-translation-free bridging; both controllers access same physical memory space with hardware-enforced mutual exclusion. Use Value: On-chip semaphore logic replaces discrete latches and AND gates; M/S pin enables master-slave topology for asymmetric control hierarchies. |
Use Scenario: Fault-tolerant avionics system where primary and backup flight controllers maintain synchronized state tables. IC Role / Device Role / Timing Role: Dual-port RAM stores mirrored state variables; each controller owns one port; BUSY arbitration prevents conflicting writes during failover transitions. Use Value: −40°C to +85°C rating ensures reliability across environmental extremes; 660 μW standby power extends battery life during dormant monitoring phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C024AV-25AXC | 25 ns access, 8K × 8, 3.3V, but uses 56-pin SOJ package and lacks integrated BUSY arbitration logic | Requires external logic for port contention resolution; suitable for simpler dual-access scenarios without real-time constraints | Select when board space permits SOJ footprint and system firmware can handle software-based arbitration |
| Renesas R1EX24002AS0A0I#U0 | Same 64-pin TQFP package and 25 ns speed, but is a 16K × 16 device with different pinout and no semaphore/interrupt features | Provides double memory depth and wider bus, but removes hardware synchronization primitives needed for inter-processor signaling | Choose only if higher density is critical and semaphore/BUSY functionality is implemented externally or omitted |
Compared with CY7C024AV-25AXC and R1EX24002AS0A0I#U0, the IDT70V05L25PF8 uniquely delivers integrated BUSY arbitration, semaphore registers, and interrupt flags in a compact 64-pin TQFP - reducing BOM count and improving determinism in tightly coupled multi-processor designs.
Availability
IDT70V05L25PF8 is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, FPGA-CPU co-processor interfacing, and legacy bus arbitration bridges requiring stable component supply across extended product lifecycles.
Supply support for IDT70V05L25PF8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
IDT70V05L25PF8 belongs to Renesas' legacy dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where hardware arbitration and synchronization primitives are essential.
FAQ
What is the maximum operating temperature range for the IDT70V05L25PF8?
The IDT70V05L25PF8 is rated for industrial temperature operation from −40°C to +85°C. This specification is validated per the DC and AC electrical characteristics tables in the official Renesas datasheet DSC2941/12, and applies to all functional modes including read, write, semaphore access, and interrupt generation under VDD = 3.3 V ±0.3 V.
Does the IDT70V05L25PF8 support true simultaneous read/write to the same memory location?
Yes - the IDT70V05L25PF8 implements true dual-port cells that allow simultaneous reads of the same location. However, simultaneous writes to the same address trigger BUSY arbitration; resolution depends on tAPS or CE-edge timing, and the winning port completes the write while the losing port's BUSY signal asserts to block further access until release.
How is semaphore functionality implemented on the IDT70V05L25PF8?
Semaphore access on the IDT70V05L25PF8 requires CE = VIH and SEM = VIL. Eight flags are addressed via A0–A2; I/O0–I/O7 carry flag values during read/write. The device provides full hardware support - no external logic is needed to set, clear, or test semaphores, and contention is resolved automatically by on-chip arbitration logic.
What package type is used for the IDT70V05L25PF8?
The IDT70V05L25PF8 uses a 64-pin thin quad flatpack (TQFP) package, designated PNG64, with dimensions 14 mm × 14 mm × 1.4 mm. Pin configuration matches the top-view diagram in Figure 2 of the Renesas datasheet DSC2941/12, and includes dedicated VDD, VSS, and I/O pin assignments per port.
Can the IDT70V05L25PF8 be configured as both MASTER and SLAVE in the same system?
No - the M/S pin configures the IDT70V05L25PF8 as either MASTER (M/S = VIH, BUSY pins output) or SLAVE (M/S = VIL, BUSY pins input) for the entire operational lifetime. Cascaded systems require physically distinct devices: one MASTER to drive BUSY outputs, and one or more SLAVES to accept BUSY inputs for hierarchical arbitration.
70V05L25PF8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 64-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:
- 8K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 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)
70V05L25PF8 FAQ
1.How can I place an order for 70V05L25PF8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V05L25PF8 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 70V05L25PF8 reliable?
The price and inventory of 70V05L25PF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05L25PF8 is usually 5 days.
3.What payment methods are accepted for 70V05L25PF8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05L25PF8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V05L25PF8?
70V05L25PF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V05L25PF8 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 70V05L25PF8?
For technical support, including 70V05L25PF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05L25PF8 requirements.
6.How does Aetrix verify that 70V05L25PF8 is sourced from the original manufacturer or authorized distributors?
All 70V05L25PF8 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 70V05L25PF8 meets industry standards.
7.What is the process for return or replacement of 70V05L25PF8?
All 70V05L25PF8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V05L25PF8, 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 70V05L25PF8 part is unused and in its original packaging.
Return procedure for 70V05L25PF8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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