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Renesas 7133SA35J8
- Part No.:
- 7133SA35J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA35J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,893
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Product details
Overview
7133SA35J8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 35 ns max read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables simultaneous independent access from two asynchronous ports and supports 32-bit+ bus expansion via MASTER/SLAVE configuration with IDT7143 in real-time control systems.
For engineers reviewing the 7133SA35J8 datasheet, 7133SA35J8 pinout, 7133SA35J8 application, or 7133SA35J8 equivalent, this page delivers verified timing specs, byte-select write control, BUSY arbitration behavior, power-down modes, and package-specific layout guidance for deterministic dual-ported memory integration.
Technical Context
The 7133SA35J8 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 conflicting writes.
It supports independent lower/upper byte write enable (R/WLLB/R/WLUB and R/WRLB/R/WRUB), output enable per port (OEL/OER), and chip-enable-controlled power-down - enabling selective port standby with ISB3 ≤ 0.2 mA (LA variant) or 1.0 mA (SA variant) under CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 (32,768 bits), organized as 2048 words × 16 bits per port |
| Access Time (tRC) | 35 ns max - defines minimum read cycle interval for guaranteed data validity |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; requires both VCC pins connected |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Dynamic Current (ICC) | 240 mA typ. at fMAX - determines thermal design margin for continuous dual-port activity |
| Standby Current (ISB3) | 1.0 mA typ. (SA), 0.2 mA typ. (LA) - sets battery backup feasibility in low-power retention mode |
| Bus Width Expansion | Master-only arbitration - enables seamless 32-bit+ systems using IDT7143 SLAVE devices without external logic |
Pinout & Package
7133SA35J8 is packaged in a 68-pin PLCC (PLG68), with 2×34-pin staggered layout, body size ≈ 0.95 in × 0.95 in × 0.17 in. Both VCC and GND pins must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low port selection; controls power-down entry/exit and output driver state |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Enables write to I/O8–I/O15 on respective port; allows byte-granular memory updates |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Enables write to I/O0–I/O7 on respective port; supports mixed-width data transfers |
| OEL / OER | Output Enable | Controls tri-state of I/O drivers independently per port; decouples read enable from CE |
| BUSYL / BUSYR | Busy Flag (Open Drain) | Indicates port contention; requires external pull-up; used for arbitration stall or interrupt signaling |
| A0L–A10L / A0R–A10R | Address Inputs | 11-bit address per port (2048 locations); fully decoded internally |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O Bidirectional | 16-bit parallel data path per port; high-impedance when CE or OE inactive |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves same-address contention autonomously; eliminates need for external arbitration circuitry |
| Separate upper/lower byte write control | Enables partial-word writes without read-modify-write cycles - critical for real-time register overlays |
| Open-drain BUSY outputs with priority resolution | Supports wired-OR interrupt generation and deterministic stall propagation across multi-chip arrays |
| Asynchronous dual-port operation | Permits independent clock domains or event-driven access - no synchronization overhead between ports |
| Single 5V supply with battery backup support | Retains data at VCC = 2.0 V (LA variant); enables nonvolatile operation during main power loss |
Applications
| Industrial Motion Controller | Avionics Data Buffer |
|---|---|
|
Use Scenario: Real-time servo loop coordination where FPGA writes position commands to one port while DSP reads status and executes PID from the other. IC Role / Device Role / Timing Role: Dual-port RAM acts as deterministic shared memory with sub-35 ns read latency and hardware arbitration to prevent command/status corruption during simultaneous access. Use Value: Eliminates software semaphores and polling; guarantees atomicity of 16-bit word transfers without CPU intervention. |
Use Scenario: ARINC 429 message buffering in flight management systems, where discrete avionics modules write telemetry while central processor reads aggregated data. IC Role / Device Role / Timing Role: Serves as fault-tolerant inter-processor communication buffer with BUSY-driven backpressure to prevent overwrites during burst traffic. Use Value: Provides deterministic 35 ns response to read requests and prevents data loss during concurrent write bursts from multiple LRUs. |
| Telecom Line Card | Medical Imaging Pipeline |
|
Use Scenario: High-throughput packet header processing on telecom line cards, where network processor writes packet metadata to one port and ASIC reads for classification. IC Role / Device Role / Timing Role: Acts as zero-wait-state descriptor queue with byte-select writes enabling efficient header field updates without full-word rewrites. Use Value: Enables line-rate packet processing by eliminating read-modify-write delays and supporting concurrent ingress/egress metadata handling. |
Use Scenario: Real-time DICOM image frame buffering in ultrasound systems, where FPGA captures raw echo data to one port while ARM processor renders preview frames from the other. IC Role / Device Role / Timing Role: Provides jitter-free pixel data handoff with independent port timing - no clock domain crossing required. Use Value: Maintains >30 fps rendering while sustaining 120 MB/s capture bandwidth, enabled by true asynchronous dual-port access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA35J8 | SLAVE-only device; BUSY pins are inputs only; no internal arbitration logic | Used only in width-expanded systems with IDT7133 as MASTER; cannot operate standalone as dual-port RAM | Select when building 32-bit+ bus systems requiring hardware arbitration offload to a single MASTER |
| CY7C136-35JC | 32K × 8 organization; 35 ns access; no built-in BUSY arbitration; requires external logic for contention resolution | Suitable for simpler dual-port use cases without cross-port synchronization needs; lacks MASTER/SLAVE expansion capability | Choose when higher density (32K) is needed and arbitration can be handled in FPGA or external logic |
Compared with IDT7143SA35J8 and CY7C136-35JC, the 7133SA35J8 uniquely integrates master arbitration, enabling drop-in deployment in deterministic real-time systems without external glue logic - a critical advantage for motion control and avionics where timing predictability is non-negotiable.
Availability
7133SA35J8 is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data buffers, and telecom line cards requiring stable component supply, long-term lifecycle assurance, and MIL-PRF-38535-compliant manufacturing traceability.
Supply support for 7133SA35J8 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, and RF solutions, now part of Renesas Electronics.
The IDT7133/7143 family was designed specifically for deterministic dual-ported memory applications in real-time embedded systems - emphasizing hardware arbitration, byte-select control, and industrial/military reliability.
FAQ
What is the function of the BUSY pin on the 7133SA35J8?
The BUSY pin on the 7133SA35J8 is an open-drain output that signals port contention when both left and right ports attempt to access the same memory location simultaneously. It stalls the lower-priority write operation and requires an external pull-up resistor. This hardware arbitration eliminates race conditions in real-time systems without software intervention - a core feature distinguishing the 7133SA35J8 from standard SRAMs.
Can the 7133SA35J8 operate with only one port active?
Yes, the 7133SA35J8 supports independent port operation: either port can be disabled via its dedicated chip enable (CEL or CER), placing that side into low-power standby mode while the other remains fully functional. With both CEs high, ISB3 drops to 1.0 mA (typ.) for SA variants - enabling selective power gating in battery-sensitive designs without affecting the active port's timing or functionality.
Is the 7133SA35J8 pin-compatible with the IDT7143SA35J8?
Yes, the 7133SA35J8 and IDT7143SA35J8 share identical pinouts across all packages (68-pin PLCC, PGA, Flatpack, and 100-pin TQFP), enabling direct PCB footprint reuse. However, their BUSY pin functions differ: 7133SA35J8 drives BUSY as an output, while IDT7143SA35J8 receives BUSY as an input - requiring correct signal routing in MASTER/SLAVE configurations.
What does "SA" signify in the 7133SA35J8 part number?
The "SA" in 7133SA35J8 denotes the standard-power version of the IDT7133 family, distinguishing it from the low-power "LA" variant. SA devices draw higher active current (240 mA typ.) but maintain identical 35 ns timing, industrial temperature rating, and pinout. The SA variant is selected when maximum speed consistency across voltage/temperature is prioritized over ultra-low standby power.
Does the 7133SA35J8 support battery backup operation?
No - battery backup data retention (down to VCC = 2.0 V) is exclusive to the LA variant (e.g., 7133LA35J8). The 7133SA35J8 operates only within the standard 4.5 V to 5.5 V supply range and loses data if VCC falls below 4.5 V. For applications requiring data retention during main power loss, the LA variant must be specified instead of the SA version.
7133SA35J8 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:
- 35ns
- Access Time:
- 35 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)
7133SA35J8 FAQ
1.How can I place an order for 7133SA35J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA35J8 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 7133SA35J8 reliable?
The price and inventory of 7133SA35J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA35J8 is usually 5 days.
3.What payment methods are accepted for 7133SA35J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA35J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA35J8?
7133SA35J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA35J8 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 7133SA35J8?
For technical support, including 7133SA35J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA35J8 requirements.
6.How does Aetrix verify that 7133SA35J8 is sourced from the original manufacturer or authorized distributors?
All 7133SA35J8 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 7133SA35J8 meets industry standards.
7.What is the process for return or replacement of 7133SA35J8?
All 7133SA35J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA35J8, 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 7133SA35J8 part is unused and in its original packaging.
Return procedure for 7133SA35J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA35J8 Tags
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AT24C02C-XHM-T
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