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Renesas 7133SA25J8
- Part No.:
- 7133SA25J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA25J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,553
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Product details
Overview
7133SA25J8 from IDT is a high-speed 2K × 16 dual-port SRAM with master arbitration logic, 25ns max access time (commercial/industrial), TTL-compatible 5V ±10% operation, and battery backup data retention down to 2V. It enables simultaneous asynchronous read/write access from independent left/right ports and is used in real-time embedded systems requiring deterministic memory arbitration - such as radar signal processors and industrial motion controllers.
For engineers reviewing the 7133SA25J8 datasheet, 7133SA25J8 pinout, 7133SA25J8 application, or 7133SA25J8 equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 25ns), byte-selectable write control (R/WLUB/R/WLLB), dual-port standby current (ISB3 ≤ 0.2mA typ.), and compatibility with 68-pin PLCC packaging for legacy board reuse.
Technical Context
The 7133SA25J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention when both ports access the same memory location, asserting open-drain BUSYL/BUSYR outputs to stall the losing port.
It supports independent byte-write enable (upper/lower 8-bit lanes per port), TTL-level signaling, and automatic power-down via chip enable (CE). The SA suffix denotes standard-power operation (1150mW active typ., 5mW standby typ.), distinct from LA low-power variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports 16-bit parallel data paths on both ports. |
| Access Time | 25ns maximum (commercial & industrial temp range); guarantees deterministic latency for real-time interrupt servicing. |
| Supply Voltage | 5.0V ±10% (4.5–5.5V); compatible with legacy 5V TTL logic families without level translation. |
| Operating Temp | –40°C to +85°C; validated for industrial environments including factory automation and transportation electronics. |
| Active Current | 230mA typical (both ports active, f = fMAX); enables accurate thermal budgeting in dense PCB layouts. |
| Standby Current | 0.2mA typical (full CMOS standby, ISB3); supports ultra-low-power sleep modes during CPU idle cycles. |
| Data Retention | 2V minimum VCC; maintains memory state during brown-out or battery-backup operation without external circuitry. |
Pinout & Package
7133SA25J8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC), with dual-row gull-wing leads and body size ≈ 0.95″ × 0.95″ × 0.17″. Both VCC and GND pins must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left-port address inputs | 11-bit address bus for 2K-word left-port access; latched on CE or R/W transition. |
| A0R–A10R | Right-port address inputs | Independent 11-bit address bus enabling concurrent addressing of same or different locations. |
| I/O0L–I/O15L | Left-port bidirectional data | 16-bit data path; direction controlled by R/WLUB/R/WLLB and OEL signals. |
| I/O0R–I/O15R | Right-port bidirectional data | Electrically isolated 16-bit path; no internal bus contention between ports. |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; drives device into 0.2mA CMOS standby when high. |
| R/WLUB / R/WLLB | Left-port upper/lower byte write enable | Enables selective 8-bit writes without read-modify-write overhead. |
| R/WRUB / R/WRLB | Right-port upper/lower byte write enable | Permits atomic byte updates on right port - critical for multi-threaded firmware variables. |
| OEL / OER | Output enable (left/right) | Controls tri-state of I/O drivers; allows shared bus usage with other peripherals. |
| BUSYL / BUSYR | Busy flag (open-drain output) | Indicates port-to-port address contention; requires external pull-up for interrupt generation. |
| VCC (pins 17, 51) | Power supply | Dual VCC pins ensure stable voltage distribution across high-current switching I/O banks. |
| GND (pins 26, 35) | Ground reference | Dual ground pins minimize ground bounce during simultaneous 16-bit port transitions. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves same-address contention deterministically without external logic; eliminates "busy lock-out" in multi-chip width-expansion configurations. |
| Separate upper/lower byte write control | Enables atomic 8-bit writes per port - essential for compact variable storage in resource-constrained firmware. |
| Open-drain BUSY outputs with priority resolution | Allows wired-OR of BUSYL/BUSYR for system-level interrupt signaling; supports daisy-chained arbitration in multi-master systems. |
| 2V data retention capability | Maintains stored values during power interruption or battery fallback; eliminates need for external backup capacitors or supercaps. |
| 68-pin PLCC footprint compatibility | Direct replacement for legacy dual-port RAMs in industrial control boards; avoids PCB redesign and requalification. |
Applications
| Radar Signal Processing | Industrial Motion Controller |
|---|---|
Use Scenario: Real-time acquisition and buffering of ADC samples from phased-array radar front-ends, with simultaneous DMA readout and CPU write of configuration parameters. IC Role / Device Role / Timing Role: Dual-port SRAM acting as ping-pong buffer; left port handles continuous 16-bit sample streaming, right port services CPU register updates. Use Value: 25ns access ensures sub-microsecond latency for interrupt-driven sample capture, while BUSY arbitration prevents corruption during concurrent access. |
Use Scenario: Coordinating position feedback from multiple servo axes and issuing synchronized PWM commands in CNC machine tool controllers. IC Role / Device Role / Timing Role: Shared memory interface between DSP (left port) and microcontroller (right port); stores trajectory tables and real-time status flags. Use Value: Byte-selectable write enables atomic update of individual axis registers without locking entire memory space, improving multitask responsiveness. |
| Avionics Data Concentrator | Medical Imaging Subsystem |
Use Scenario: Aggregating ARINC 429 and discrete sensor inputs in flight control computers, with deterministic handoff to safety-critical processing cores. IC Role / Device Role / Timing Role: Master arbitration SRAM providing contention-free memory access between redundant processor channels. Use Value: MIL-qualified temperature range (–40°C to +85°C) and 2V data retention meet DO-254 reliability requirements for airborne systems. |
Use Scenario: Storing raw pixel frames from ultrasound transducer arrays prior to FPGA-based beamforming and digital signal processing. IC Role / Device Role / Timing Role: High-bandwidth frame buffer interfacing between analog front-end ASIC and image processing engine. Use Value: Simultaneous 16-bit reads/writes at 25ns enable sustained 40MB/s throughput required for real-time B-mode imaging pipelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-25JC | 2K × 16, 25ns, 5V, 68-pin PLCC - identical speed/temp but lacks on-chip arbitration logic; BUSY must be implemented externally. | Suitable only where external arbitration logic is acceptable; not drop-in for systems relying on 7133SA25J8's integrated BUSY resolution. | Select if cost sensitivity outweighs design simplicity; requires additional gates and layout area for arbitration. |
| IDT7143SA25J8 | Same pinout and timing, but SLAVE-only variant: BUSY pins are inputs only; no arbitration logic; lower active power (1050mW vs 1150mW). | Used only in width-expanded systems paired with a 7133 master; cannot operate standalone as arbitration controller. | Choose only as companion to 7133SA25J8 in 32-bit+ memory systems; not functionally equivalent for single-chip applications. |
Compared with CY7C136-25JC and IDT7143SA25J8, the 7133SA25J8 uniquely integrates master arbitration logic - eliminating external components for contention resolution and enabling true plug-and-play dual-CPU memory sharing without timing margin loss.
Availability
7133SA25J8 is available at Aetrix Electronics and suitable for radar signal processing, industrial motion control, and avionics data concentrators requiring stable component supply across extended product lifecycles.
Supply support for 7133SA25J8 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 semiconductor company specializing in timing, memory interface, and RF solutions, now part of Renesas Electronics.
The IDT7133 family was designed specifically for deterministic dual-processor and real-time embedded systems requiring hardware-arbitrated shared memory - targeting aerospace, defense, and industrial automation markets.
FAQ
What is the operating temperature range for the 7133SA25J8?
7133SA25J8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per manufacturer specifications and supports deployment in factory automation, transportation electronics, and outdoor industrial equipment without derating.
Does the 7133SA25J8 support battery backup operation?
Yes, the 7133SA25J8 supports data retention down to 2V VCC, enabling reliable operation during brown-out conditions or when backed by a coin-cell battery. This feature is inherent to the SA/LA family and requires no external circuitry beyond standard decoupling.
Is the 7133SA25J8 pin-compatible with the IDT7143SA25J8?
Yes, the 7133SA25J8 and IDT7143SA25J8 share identical 68-pin PLCC pinouts and AC/DC electrical specifications. However, their BUSY pin functionality differs: 7133SA25J8 has open-drain BUSY outputs with arbitration logic, while IDT7143SA25J8 uses BUSY as inputs only.
What is the significance of the "SA" suffix in 7133SA25J8?
The "SA" suffix denotes Standard Active power rating: 1150mW typical active power and 5mW typical standby power. This distinguishes it from "LA" (Low Active) variants, which consume 1050mW active and 1mW standby - optimized for battery-powered applications.
How does the BUSY arbitration logic function in the 7133SA25J8?
In the 7133SA25J8, BUSY arbitration detects simultaneous access to the same memory address across ports. When contention occurs, it asserts BUSYL or BUSYR (whichever port loses priority) to stall the write cycle. The winning port proceeds immediately, ensuring deterministic behavior without software intervention.
7133SA25J8 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:
- 32Kbit
- Memory Organization:
- 2K x 16
- 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)
7133SA25J8 FAQ
1.How can I place an order for 7133SA25J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA25J8 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 7133SA25J8 reliable?
The price and inventory of 7133SA25J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA25J8 is usually 5 days.
3.What payment methods are accepted for 7133SA25J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA25J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA25J8?
7133SA25J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA25J8 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 7133SA25J8?
For technical support, including 7133SA25J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA25J8 requirements.
6.How does Aetrix verify that 7133SA25J8 is sourced from the original manufacturer or authorized distributors?
All 7133SA25J8 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 7133SA25J8 meets industry standards.
7.What is the process for return or replacement of 7133SA25J8?
All 7133SA25J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA25J8, 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 7133SA25J8 part is unused and in its original packaging.
Return procedure for 7133SA25J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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