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Renesas 7005L25J8
- Part No.:
- 7005L25J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7005L25J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
IDT7005L25J8 from Integrated Device Technology (IDT) is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 25 ns maximum read cycle time (tRC), TTL-compatible 5 V ±10% supply, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the IDT7005L25J8 datasheet, IDT7005L25J8 pinout, IDT7005L25J8 application, or IDT7005L25J8 equivalent, key selection criteria include simultaneous dual-port read capability, BUSY/INT flag timing (tBAA ≤ 20 ns), low standby power (1 mW typ.), and 64-pin TQFP package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The IDT7005L25J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L vs. A0R–A12R/I/O0R–I/O7R), enabling concurrent read/write operations without external arbitration logic. Its on-chip semaphore logic supports eight hardware flags addressed via A0–A2, with dedicated SEM/SEML/SEMR pins.
Port arbitration is managed via push-pull BUSY outputs (M/S = H) or inputs (M/S = L), with tAPS = 5 ns setup time ensuring deterministic priority resolution during address contention. The device supports battery backup operation at 2 V with data retention current ≤ 4000 µA (military/industrial grade).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total); enables 64 KB byte-addressable storage per port without external decoding |
| Max Read Cycle Time (tRC) | 25 ns - guarantees full-speed 40 MHz sustained memory access when both ports operate concurrently |
| Active Power (typ.) | 700 mW - low-power L-version reduces thermal load in dense PCB layouts versus S-version (750 mW) |
| Standby Current (ISB3) | 0.2 mA (typ.) - ultra-low full-standby mode enables battery-backed operation with minimal drain |
| Operating Voltage | 5.0 V ±10% - single-supply TTL compatibility eliminates need for level shifters in legacy 5 V systems |
| Temperature Range | –40°C to +85°C - qualified for industrial environments including motor drives and PLCs |
| Data Retention Voltage | 2.0 V - maintains stored contents during main power loss using backup battery or supercapacitor |
Pinout & Package
Package: 64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A12L | Left-port address inputs | 13-bit address bus for left-side memory access; decodes 8K locations independently of right port |
| I/O0L–I/O7L | Left-port bidirectional data | 8-bit data path supporting simultaneous read/write with right port; tri-state controlled by OEL/R/WL |
| CEL, R/WL, OEL | Left-port control enables | Chip Enable, Read/Write, Output Enable - fully asynchronous control with no clock required |
| A0R–A12R | Right-port address inputs | Independent 13-bit address space; non-mirrored - A0L–A12L ≠ A0R–A12R per datasheet note |
| I/O0R–I/O7R | Right-port bidirectional data | Separate 8-bit I/O bank; allows lock-step or independent data exchange between processors |
| CER, R/WR, OER | Right-port control enables | Asynchronous enable set identical in function to left-port controls but electrically isolated |
| SEML, SEMR | Semaphore enable inputs | Activate hardware semaphore register bank (8 flags); accessed via I/O0–I/O7 using A0–A2 as flag index |
| BUSYL, BUSYR | Busy status signals | Push-pull outputs (master) or inputs (slave); resolve port contention without external logic |
| INTL, INTR | Interrupt flags | Open-drain compatible outputs signaling inter-processor events; initialized at power-up per Truth Table III |
| M/S | Master/Slave select | Configures BUSY behavior: HIGH = BUSY output (arbitration master), LOW = BUSY input (slave) |
| VCC, GND | Power and ground | Multiple VCC/GND pins distributed across package for low-noise operation and reduced EMI |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from same address on both ports - eliminates arbitration wait states in shared-memory multiprocessing |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2 and I/O0–I/O7 - removes need for discrete latches or software polling |
| Automatic power-down | CE-controlled standby mode draws only 1 mW (typ.) - extends battery life in portable or backup-critical applications |
| Full port-to-port arbitration | Deterministic priority resolution via tAPS = 5 ns setup time - ensures predictable latency in real-time control loops |
| 2 V data retention | Maintains valid memory state during brown-out or main power failure - supports graceful shutdown and fast recovery |
Applications
| Industrial PLC Memory Buffer | Real-Time Motor Control Co-Processor |
|---|---|
|
Use Scenario: Dual-CPU architecture where one processor handles I/O scanning and the other executes motion control algorithms. IC Role / Device Role / Timing Role: Shared memory buffer with hardware semaphore synchronization between CPUs; BUSY flag prevents write collisions during position update cycles. Use Value: Eliminates software mutex overhead and guarantees sub-25 ns memory access for 10 kHz servo loop updates. |
Use Scenario: FPGA-based motion controller exchanging trajectory data with ARM host CPU via shared memory. IC Role / Device Role / Timing Role: Asynchronous dual-port interface enabling FPGA to write interpolated waypoints while ARM reads completed segments. Use Value: Achieves zero-wait-state data transfer at 40 MHz, sustaining >320 MB/s aggregate bandwidth across both ports. |
| Avionics Health Monitor Interface | Redundant Communication Gateway |
|
Use Scenario: Fault-tolerant system with primary and backup flight computers sharing sensor fusion results. IC Role / Device Role / Timing Role: Battery-backed dual-port RAM storing critical telemetry; INTL/INTR flags signal health status changes between domains. Use Value: 2 V data retention preserves last-known-good state during power interruption, meeting DO-254 safety requirements. |
Use Scenario: Dual-RS485 gateway where two microcontrollers manage separate fieldbus networks and exchange protocol-converted messages. IC Role / Device Role / Timing Role: Hardware semaphore-controlled message queue with atomic flag updates preventing packet corruption during failover. Use Value: Reduces inter-processor handshake latency to <5 ns, enabling sub-millisecond switchover in SIL-3 rated systems. |
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 CY7C028V-25AXC | 8K × 16 organization, 25 ns tRC, 3.3 V core (5 V tolerant I/O), 100-pin TQFP | Requires wider data bus; incompatible pinout and voltage domain; no native 2 V retention | Select only if 16-bit word width and 3.3 V system integration outweigh redesign effort. |
| Renesas R1EX24002AS0I-25 | 8K × 8, 25 ns tRC, 5 V supply, 64-pin TQFP, but lacks semaphore logic and BUSY arbitration | No hardware semaphore or automatic port arbitration - requires external logic or software coordination | Choose only for cost-sensitive designs where inter-processor sync is handled in firmware. |
Compared with CY7C028V-25AXC and R1EX24002AS0I-25, the IDT7005L25J8 uniquely delivers integrated semaphore arbitration, 2 V data retention, and true dual-port concurrency in a drop-in 64-pin TQFP footprint - reducing BOM count and validation effort for industrial real-time systems.
Availability
IDT7005L25J8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics health monitors, and redundant communication gateways requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for IDT7005L25J8 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
Integrated Device Technology (IDT), now part of Renesas Electronics, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.
The IDT7005L25J8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in hard real-time embedded systems demanding zero-latency memory sharing.
FAQ
What is the maximum operating speed of the IDT7005L25J8?
The IDT7005L25J8 has a maximum read cycle time (tRC) of 25 ns, supporting sustained 40 MHz memory access on both ports simultaneously. This speed is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, with timing parameters like tAA (address access) and tACE (chip enable access) also rated at 25 ns max.
Does the IDT7005L25J8 support battery backup operation?
Yes, the IDT7005L25J8 supports battery backup with data retention down to 2.0 V (VDR), drawing ≤4000 µA in retention mode per datasheet Table 9. This enables reliable memory hold during main power loss in applications such as avionics black boxes or industrial UPS systems, without requiring external retention circuitry.
How does port arbitration work on the IDT7005L25J8?
Port arbitration on the IDT7005L25J8 uses push-pull BUSY signals and hardware semaphore logic. When M/S = H (master), BUSYL/BUSYR assert to block conflicting writes; when M/S = L (slave), BUSY inputs inhibit local writes. Priority is resolved deterministically with tAPS = 5 ns setup time, eliminating race conditions during address contention.
What package type is used for the IDT7005L25J8?
The IDT7005L25J8 is packaged in a 64-pin thin quad flatpack (TQFP) with 0.5 mm lead pitch, body dimensions 14 mm × 14 mm × 1.4 mm. This RoHS-compliant, green-part-qualified package provides optimal thermal performance and PCB density for industrial control modules and avionics subsystems.
Can the IDT7005L25J8 be used in a master/slave configuration?
Yes, the IDT7005L25J8 supports master/slave cascading via the M/S pin: M/S = H configures BUSY as output (master), while M/S = L configures BUSY as input (slave). This enables expansion to 16-bit or wider data paths without external logic, as confirmed in the Functional Block Diagram and Pin Configuration notes.
7005L25J8 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7005L25J8 FAQ
1.How can I place an order for 7005L25J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005L25J8 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 7005L25J8 reliable?
The price and inventory of 7005L25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005L25J8 is usually 5 days.
3.What payment methods are accepted for 7005L25J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005L25J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005L25J8?
7005L25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005L25J8 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 7005L25J8?
For technical support, including 7005L25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005L25J8 requirements.
6.How does Aetrix verify that 7005L25J8 is sourced from the original manufacturer or authorized distributors?
All 7005L25J8 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 7005L25J8 meets industry standards.
7.What is the process for return or replacement of 7005L25J8?
All 7005L25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7005L25J8, 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 7005L25J8 part is unused and in its original packaging.
Return procedure for 7005L25J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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