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Renesas 70V05L25J8
- Part No.:
- 70V05L25J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
70V05L25J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
IDT70V05L25J8 from Renesas Electronics (formerly IDT) is a high-speed, 3.3V, 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 25 ns maximum access time, and industrial temperature range (–40°C to +85°C). It supports simultaneous read/write operations on both ports, features on-chip semaphore logic and BUSY arbitration, and is used in real-time inter-processor communication, video frame buffers, and network packet buffering.
For engineers reviewing the IDT70V05L25J8 datasheet, IDT70V05L25J8 pinout, IDT70V05L25J8 application, or IDT70V05L25J8 equivalent, key selection considerations include dual-port contention resolution timing (tAPS, tBDD), low-power standby current (660 µW typ.), 3.3V single-supply operation, and TQFP-64 package compatibility for space-constrained embedded systems.
Technical Context
The IDT70V05L25J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (left: A0L–A12L, I/O0L–I/O7L; right: A0R–A12R, I/O0R–I/O7R). Port arbitration is handled by dedicated hardware logic supporting BUSY flag signaling and semaphore registers (8 flags, addressed via A0–A2).
It uses CMOS process technology for low power consumption and includes automatic power-down via CE control, TTL-compatible I/O levels, and push-pull BUSY/INT outputs. The device supports MASTER/SLAVE cascading for 16-bit+ data bus expansion using the M/S pin to configure BUSY as output (master) or input (slave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 (64 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Access Time (tAA) | 25 ns max - guarantees deterministic read latency under worst-case industrial conditions (–40°C to +85°C, VDD = 3.3V ±0.3V) |
| Supply Voltage | 3.3 V ±0.3 V - single-supply operation eliminates need for voltage translation in 3.3V system designs |
| Active Current (IDD) | 115 mA typ. at fMAX - enables predictable thermal design and power budgeting in real-time buffer applications |
| Standby Current (ISB) | 660 µW typ. - allows ultra-low-power sleep modes during idle periods without data loss |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control, telecom infrastructure, and avionics subsystems |
| Package | 64-pin TQFP (PNG64), 14 mm × 14 mm × 1.4 mm - surface-mount compatible with automated PCB assembly and compact board layouts |
Pinout & Package
Package: 64-pin Thin Quad Flatpack (TQFP), PN64, body size 14 mm × 14 mm × 1.4 mm. All VDD pins require local decoupling; all GND pins must be connected to ground plane for signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left port address inputs | 13-bit address bus for left-side memory access; supports full 8K addressing independently of right port |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit data path for reads/writes; high-impedance when OE/CE disabled - enables bus sharing |
| CEL, OEL, R/WL | Left port controls | Chip enable, output enable, and read/write direction - fully asynchronous with no clock required |
| A0R–A12R | Right port address inputs | Independent 13-bit address bus; concurrent access to same or different locations possible |
| I/O0R–I/O7R | Right port bidirectional data | 8-bit data path isolated from left port; avoids contention without external logic |
| CER, OER, R/WR | Right port controls | Asynchronous enable and direction control - identical timing behavior to left port |
| SEML, SEMR | Semaphore enable inputs | Selects semaphore register access mode; enables eight hardware mutex flags for inter-processor synchronization |
| BUSYL, BUSYR | Arbitration status signals | Push-pull outputs indicate port contention; configured as input on slave devices to accept arbitration from master |
| M/S | Master/Slave configuration | VIH configures BUSY as output (master); VIL configures BUSY as input (slave) - enables daisy-chained multi-device systems |
| INTL, INTR | Interrupt request outputs | Open-drain capable (per truth table); assert on semaphore set/clear or address match - reduces polling overhead |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables zero-wait-state concurrent reads/writes on both ports - eliminates software serialization bottlenecks in real-time systems |
| Hardware semaphore logic | Eight dedicated, addressable semaphore registers (A0–A2) provide atomic lock/unlock without CPU intervention or external latches |
| On-chip BUSY arbitration | Automatic port-to-port conflict detection and resolution via BUSYL/BUSYR signals - prevents data corruption during simultaneous access |
| MASTER/SLAVE cascading | M/S pin enables seamless 16-bit+ data bus expansion using multiple IDT70V05L25J8 devices - no glue logic required |
| Low-power standby mode | 660 µW typical ISB allows extended idle periods in battery-backed or energy-sensitive applications while retaining memory contents |
Applications
| Real-Time Inter-Processor Communication | Video Frame Buffering |
|---|---|
|
Use Scenario: Two microcontrollers exchange sensor data and control commands in hard real-time loop with sub-microsecond latency requirements. IC Role / Device Role: Shared memory buffer with hardware arbitration ensures deterministic access without software locks or polling. Use Value: Eliminates race conditions and CPU overhead from software semaphores; 25 ns access enables >30 MHz effective throughput per port. |
Use Scenario: Capturing and displaying progressive-scan video at 60 fps with minimal motion blur requires double-buffered pixel storage. IC Role / Device Role: Dual-port SRAM acts as ping-pong frame buffer - one port writes incoming frames while the other reads for display. Use Value: Simultaneous read/write avoids frame tearing; 8K × 8 organization supports 640×480 monochrome or 320×240 RGB565 formats. |
| Network Packet Buffering | Industrial PLC Data Exchange |
|
Use Scenario: Ethernet MAC and application processor share packet metadata and payload in a switch ASIC subsystem. IC Role / Device Role: High-speed shared memory for descriptor rings and small packet storage with interrupt-driven notification. Use Value: INTL/INTR flags reduce host polling; 3.3V I/O matches PHY interface voltage, avoiding level shifters. |
Use Scenario: Programmable logic controller synchronizes I/O scan cycles between main CPU and safety co-processor. IC Role / Device Role: Dual-port RAM stores shared tag database with semaphore-controlled write access to prevent inconsistent state updates. Use Value: Hardware semaphores guarantee atomic tag updates; industrial temp rating ensures reliability in factory-floor enclosures. |
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 | Same 8K × 8 organization and 25 ns speed, but 5V-tolerant I/O and wider commercial temp range (0°C to +70°C) | Lacks integrated semaphore logic and BUSY arbitration - requires external logic for contention management | Choose when legacy 5V system integration is required and arbitration can be implemented externally |
| Renesas 70V25L25JG | Pin-compatible 64-pin TQFP variant with identical timing and electrical specs, but supports JTAG boundary scan (IEEE 1149.1) | Identical functional behavior; JTAG support enables in-system testability and debug visibility not available in IDT70V05L25J8 | Choose when production test coverage or field diagnostics require boundary-scan capability |
Compared with CY7C024AV-25AXC, IDT70V05L25J8 delivers integrated arbitration and lower power; compared with 70V25L25JG, it offers cost-optimized BOM without JTAG overhead - making it ideal for volume industrial designs where test access is handled at board level.
Availability
IDT70V05L25J8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, video frame buffering, and industrial PLC data exchange requiring stable component supply across long production lifecycles.
Supply support for IDT70V05L25J8 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 IoT applications.
IDT70V05L25J8 belongs to Renesas' legacy dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory architectures in real-time embedded systems where hardware-enforced concurrency control is critical.
FAQ
What is the maximum operating frequency supported by the IDT70V05L25J8?
The IDT70V05L25J8 does not operate on a clock; it is a fully asynchronous SRAM. Its performance is defined by access time (tAA ≤ 25 ns) and cycle time (tRC ≤ 25 ns), enabling effective throughput up to ~40 MHz in tightly controlled read/write sequences. Timing is guaranteed across –40°C to +85°C and 3.3V ±0.3V supply.
Does the IDT70V05L25J8 support simultaneous read operations on both ports to the same memory location?
Yes, the IDT70V05L25J8 supports true simultaneous reads to the same address on both ports without contention or delay. This is enabled by its true dual-port cell architecture - confirmed in the datasheet Feature section and Functional Block Diagram. No arbitration or BUSY assertion occurs during concurrent reads.
How is semaphore functionality implemented in the IDT70V05L25J8?
The IDT70V05L25J8 integrates eight hardware semaphore flags accessible via I/O0–I/O7 and addressed by A0–A2. Semaphore access requires CE = VIH and SEM = VIL (opposite of RAM access). Each flag provides atomic set/clear with interrupt generation (INTL/INTR), eliminating need for external locking logic in multi-processor systems.
What is the role of the M/S pin on the IDT70V05L25J8?
The M/S pin configures the IDT70V05L25J8 as either MASTER (M/S = VIH) or SLAVE (M/S = VIL). In MASTER mode, BUSYL/BUSYR are outputs asserting contention status. In SLAVE mode, they become inputs accepting BUSY signals from a master device - enabling scalable multi-SRAM systems without external arbitration logic.
Can the IDT70V05L25J8 be used in a 16-bit data bus configuration?
Yes, the IDT70V05L25J8 supports 16-bit expansion via MASTER/SLAVE cascading. Two devices are connected in parallel with M/S pins set to VIH (master) and VIL (slave); the master's BUSY output controls the slave's BUSY input, enabling synchronized 16-bit access without external glue logic - as documented in the Features and Description sections.
70V05L25J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- 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:
- 68-PLCC (24.21x24.21)
70V05L25J8 FAQ
1.How can I place an order for 70V05L25J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V05L25J8 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 70V05L25J8 reliable?
The price and inventory of 70V05L25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V05L25J8 is usually 5 days.
3.What payment methods are accepted for 70V05L25J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V05L25J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V05L25J8?
70V05L25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V05L25J8 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 70V05L25J8?
For technical support, including 70V05L25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V05L25J8 requirements.
6.How does Aetrix verify that 70V05L25J8 is sourced from the original manufacturer or authorized distributors?
All 70V05L25J8 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 70V05L25J8 meets industry standards.
7.What is the process for return or replacement of 70V05L25J8?
All 70V05L25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V05L25J8, 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 70V05L25J8 part is unused and in its original packaging.
Return procedure for 70V05L25J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V05L25J8 Tags
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