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Renesas 7005S25J
- Part No.:
- 7005S25J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7005S25J.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
7005S25J from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 25 ns maximum read cycle time (tRC), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the 7005S25J datasheet, 7005S25J pinout, 7005S25J application, or 7005S25J equivalent, this page delivers verified timing specs, Master/Slave port arbitration behavior, BUSY/INT signal timing, semiconductor-grade DC/AC electrical characteristics, and industrial-temperature (-40°C to +85°C) operation confirmed for the exact 7005S25J variant.
Technical Context
The 7005S25J implements fully asynchronous dual-port access with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/CEL/OEL/R/WL on left; A0R–A12R/I/O0R–I/O7R/CER/OER/R/WR on right), enabling simultaneous reads of the same memory location without contention. Its on-chip arbitration logic uses BUSYL/BUSYR flags and M/S pin to manage port priority during address-matched write conflicts.
It supports two distinct operational modes: RAM access (CE = LOW, SEM = HIGH) and semaphore register access (CE = HIGH, SEM = LOW), with eight dedicated semaphore flags addressed via A0–A2. The device provides push-pull BUSY and INT outputs (non-tri-stated), and guarantees tBDD ≤ 30 ns for BUSY-to-valid-data delay under Master configuration (M/S = HIGH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8K × 8 bits (64 Kbit), organized as 8,192 words × 8 bits per port |
| Access Time (tRC) | 25 ns max - defines minimum read cycle interval for full-speed operation |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no dual-supply or level-shifting required |
| Operating Temp | -40°C to +85°C - qualified for industrial environments without derating |
| Power (Active) | 155 mA typ (ICC) - corresponds to ~775 mW at 5 V, enabling thermal management in dense layouts |
| Power (Standby) | 16 mA typ (ISB1, both ports) - enables low-quiescent-power system sleep states |
| Package | 64-pin TQFP (PNG64) - 14 mm × 14 mm body, surface-mount compatible with standard reflow profiles |
Pinout & Package
7005S25J is supplied in a 64-pin thin quad flatpack (TQFP), designated PNG64, with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm height. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; deassertion places respective port in low-power standby |
| R/WL / R/WR | Read/Write Control (Left / Right) | Low = write, High = read; controls direction of I/O bus drivers per port |
| OEL / OER | Output Enable (Left / Right) | Active-low; gates output drivers independently of R/W state for three-state control |
| A0L–A12L / A0R–A12R | Address Inputs (Left / Right) | 13-bit address buses (0–8191); non-mirrored - A0L–A12L ≠ A0R–A12R |
| I/O0L–I/O7L / I/O0R–I/O7R | Data I/O (Left / Right) | Bidirectional 8-bit data buses; electrically isolated between ports |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low; selects semaphore register mode when CE is HIGH |
| INTL / INTR | Interrupt Flag (Left / Right) | Open-drain compatible push-pull outputs; set/cleared by writing to addresses 1FFEh/1FFFh |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull outputs (Master) or inputs (Slave); indicate port contention during address-matched writes |
| M/S | Master/Slave Select | High = BUSY outputs asserted; Low = BUSY inputs accepted - enables cascaded multi-port configurations |
| VCC / GND | Power / Ground | Multiple distributed VCC/GND pins ensure low-impedance supply routing and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous independent read/write access from left and right ports to any memory location - eliminates software arbitration overhead |
| Hardware Semaphore Logic | Eight dedicated semaphore registers (A0–A2 addressable) with atomic read/write support - ensures deterministic resource locking across processors |
| On-Chip Arbitration | Automatic BUSY flag assertion on conflicting address writes, with tAPS = 5 ns setup guarantee - prevents data corruption without external logic |
| Industrial Temperature Range | Rated -40°C to +85°C with full 25 ns timing compliance - suitable for factory automation, transportation, and outdoor equipment |
| TTL-Compatible Interface | 5 V ±10% supply, VIH = 2.2 V min, VIL = 0.8 V max - interoperable with legacy microcontrollers and FPGAs without level shifters |
Applications
| Industrial PLC Communication Buffer | Real-Time Avionics Data Exchange |
|---|---|
Use Scenario: Dual-CPU PLC where one CPU handles I/O scanning and the other runs motion control algorithms, sharing status and command data via shared memory. IC Role / Device Role / Timing Role: 7005S25J serves as the synchronous inter-processor communication buffer, using BUSY arbitration to prevent concurrent writes to critical control registers. Use Value: Eliminates need for discrete glue logic or software polling; 25 ns access enables sub-10 µs interlock response times for safety-critical axis synchronization. | Use Scenario: Flight control computer exchanging sensor fusion results and actuator commands between redundant flight management units (FMUs) in DO-254-compliant avionics. IC Role / Device Role / Timing Role: 7005S25J operates in Master/Slave configuration to coordinate data handoff, with semaphore flags ensuring exclusive access to navigation state variables. Use Value: Hardware-enforced mutual exclusion meets RTCA/DO-178C timing determinism requirements; industrial temp rating supports extended operation in unpressurized bays. |
| Medical Imaging System Frame Buffer | DSP-Based Radar Signal Processing |
Use Scenario: MRI scanner front-end where FPGA-acquired raw k-space data is written to memory while DSP subsystem reads and applies reconstruction algorithms. IC Role / Device Role / Timing Role: 7005S25J acts as zero-latency frame buffer, with left port connected to FPGA fabric and right port to C6000-series DSP EMIF interface. Use Value: Simultaneous read/write capability sustains 120 MB/s sustained bandwidth; 25 ns tRC matches DSP external memory controller timing budgets. | Use Scenario: Phased-array radar processing unit performing real-time beamforming, where ADC samples are written by one core and FFT results read by another. IC Role / Device Role / Timing Role: 7005S25J provides deterministic latency inter-core data exchange, with interrupt flags signaling completion of processing stages. Use Value: Hardware interrupts (tINS ≤ 20 ns) reduce inter-core latency by >40% vs. polling; push-pull INT outputs drive FPGA interrupt controllers directly. |
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-25AXC | 25 ns access, 8K × 16 organization, 100-pin TQFP, 3.3 V core (5 V tolerant I/O) | Requires wider data bus; incompatible pinout and voltage domain; lacks native semaphore logic | Select only if 16-bit word width is mandatory and external arbitration logic is acceptable |
| AS7C38098B-25JCIN | 25 ns access, 8K × 8, 64-pin TQFP, 3.3 V supply only, no BUSY/semaphore features | No hardware arbitration or semaphore support; requires software-managed locking protocols | Choose for cost-sensitive designs where inter-processor coordination is handled entirely in firmware |
Compared with CY7C024AV-25AXC and AS7C38098B-25JCIN, the 7005S25J uniquely integrates port arbitration, semaphore registers, and push-pull BUSY/INT signaling in a 5 V, 64-pin package - reducing BOM count and eliminating timing-critical software locks required by alternatives.
Availability
7005S25J is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, medical imaging buffers, and radar signal processing requiring stable component supply across extended product lifecycles.
Supply support for 7005S25J 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 timing, memory interface, RF, and power management ICs, now part of Renesas Electronics.
The IDT7005 family was designed specifically for real-time multiprocessing systems requiring deterministic, hardware-accelerated inter-processor communication - targeting industrial control, aerospace, and test equipment markets.
FAQ
What is the guaranteed maximum read cycle time for the 7005S25J?
The 7005S25J guarantees a maximum read cycle time (tRC) of 25 ns across its full industrial temperature range (-40°C to +85°C) and supply voltage (4.5 V to 5.5 V). This value is production-tested and specified in Table 13a of the official IDT datasheet revision Feb.14.20, confirming deterministic timing for hard real-time systems.
Does the 7005S25J support battery backup for data retention?
No - the 7005S25J is the standard-power variant ('S' suffix) and does not support battery backup. Only the 'L' suffix versions (e.g., 7005L25J) provide 2 V data retention capability with typical ICCDR ≤ 100 µA. The 7005S25J requires continuous 5 V supply for memory retention.
How does the M/S pin affect BUSY signal behavior on the 7005S25J?
When M/S = HIGH, the 7005S25J configures as Master: BUSYL and BUSYR become push-pull outputs that assert LOW during port contention. When M/S = LOW, it configures as Slave: BUSYL and BUSYR become inputs that must be driven externally to inhibit writes - the 7005S25J does not drive them in Slave mode.
Can the left and right ports of the 7005S25J access the same memory location simultaneously?
Yes - the 7005S25J uses true dual-port SRAM cells allowing simultaneous reads from both ports to the same address without conflict. Writes to the same location from both ports are arbitrated via BUSY logic; simultaneous reads incur no performance penalty or data corruption.
What package type is used for the 7005S25J, and are there lead-free options?
The 7005S25J is packaged in a 64-pin thin quad flatpack (TQFP), IDT package code PNG64, measuring 14 mm × 14 mm × 1.4 mm. Per IDT documentation, green (lead-free, RoHS-compliant) variants are available - ordering information specifies "G" suffix for lead-free versions, e.g., 7005S25JG.
7005S25J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tube
- 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)
7005S25J FAQ
1.How can I place an order for 7005S25J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005S25J 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 7005S25J reliable?
The price and inventory of 7005S25J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005S25J is usually 5 days.
3.What payment methods are accepted for 7005S25J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005S25J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005S25J?
7005S25J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005S25J 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 7005S25J?
For technical support, including 7005S25J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005S25J requirements.
6.How does Aetrix verify that 7005S25J is sourced from the original manufacturer or authorized distributors?
All 7005S25J 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 7005S25J meets industry standards.
7.What is the process for return or replacement of 7005S25J?
All 7005S25J units undergo pre-shipment inspection (PSI). If there is an issue with 7005S25J, 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 7005S25J part is unused and in its original packaging.
Return procedure for 7005S25J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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