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Renesas 7133SA45JI
- Part No.:
- 7133SA45JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA45JI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,916
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Product details
Overview
7133SA45JI from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 45 ns max read cycle time, TTL-compatible 5 V ±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.
For engineers reviewing the 7133SA45JI datasheet, 7133SA45JI pinout, 7133SA45JI application, or 7133SA45JI equivalent, this page delivers verified timing parameters, BUSY arbitration behavior, byte-select write control, power-down modes, and real-world use cases in real-time embedded systems requiring deterministic memory coherency.
Technical Context
The 7133SA45JI 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 byte-write enable (R/WLUB/R/WLLB for left port; R/WRUB/R/WRLB for right port), TTL-level signaling, and automatic power-down via chip enable (CE) - reducing standby current to 25 mA (TTL inputs) or 1.0 mA (CMOS inputs) under ISB1/ISB3 conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16 (32,768 bits), dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time (tRC) | 45 ns - defines minimum interval between successive reads on same port |
| Address Access Time (tAA) | 45 ns max - delay from stable address to valid data output |
| Chip Enable Access (tACE) | 45 ns max - delay from CE assertion to valid output |
| Output Enable Access (tAOE) | 25 ns max - delay from OE assertion to valid data |
| Standby Current (ISB1) | 25 mA max (TTL inputs, both ports disabled) - critical for low-power idle states |
| Active Current (ICC) | 230 mA typ. (both ports active at fMAX) - informs power supply and thermal design |
Pinout & Package
7133SA45JI is packaged in a 68-pin PLCC (PLG68), with dual-port symmetry: left port (L) and right port (R) each feature 11 address lines (A0L–A10L / A0R–A10R), 16 bidirectional I/Os (I/O0L–I/O15L / I/O0R–I/O15R), and dedicated control signals including CEL/CER, OEL/OER, R/WLUB/R/WLLB, R/WRUB/R/WRLB, and BUSYL/BUSYR. Two VCC and two GND pins ensure stable power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable for respective port; controls power-down mode when HIGH |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Enables write to I/O8–I/O15 on corresponding port; allows byte-granular writes |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Enables write to I/O0–I/O7 on corresponding port; supports 8-bit sub-word access |
| OEL / OER | Output Enable (L/R) | Controls tri-state of I/O drivers; independent from write enable |
| BUSYL / BUSYR | Busy Flag (L/R) | Open-drain output (7133) indicating port contention; requires external pull-up |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address bus per port; selects one of 2K locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | 16-bit bidirectional data bus per port; electrically isolated between ports |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves simultaneous same-address access without external logic; prevents data corruption via BUSY-driven write inhibition |
| Separate upper/lower byte write control | Enables efficient 8-bit updates in 16-bit systems without read-modify-write cycles |
| Asynchronous dual-port operation | Allows independent clock domains or event-driven access - no synchronization overhead required |
| TTL-compatible 5 V interface | Direct interfacing with legacy microcontrollers, FPGAs, and ASICs without level-shifting |
| Industrial temperature range (–40°C to +85°C) | Validated operation in harsh environments such as factory automation and transportation control systems |
Applications
| Real-Time Industrial PLC | Dual-CPU Communication Buffer |
|---|---|
Use Scenario: Two independent CPUs share status, command, and sensor data in a programmable logic controller with deterministic response. IC Role / Device Role / Timing Role: 7133SA45JI acts as a contention-managed shared memory buffer, using BUSY arbitration to serialize concurrent writes to identical registers. Use Value: Eliminates software semaphores and polling; guarantees atomic register updates with ≤45 ns latency for control loop closure. |
Use Scenario: Host processor and DSP exchange streaming audio/video buffers with zero-copy transfers and minimal latency. IC Role / Device Role / Timing Role: 7133SA45JI serves as a ping-pong memory bridge, with left port connected to host and right port to DSP, enabling full-bandwidth parallel access. Use Value: Sustains 22.2 MB/s throughput (16-bit × 1/45 ns) without DMA bottlenecks or bus contention penalties. |
| Avionics Data Acquisition | Redundant Control System Memory |
Use Scenario: Flight computer and backup monitor simultaneously log telemetry while maintaining strict data integrity across power domains. IC Role / Device Role / Timing Role: 7133SA45JI provides fault-isolated memory access; BUSY flag triggers failover if primary CPU fails mid-write. Use Value: Enables certified DO-254 compliance via hardware-enforced write serialization and deterministic arbitration timing. |
Use Scenario: Primary and secondary controllers maintain mirrored state tables with guaranteed consistency during switchover events. IC Role / Device Role / Timing Role: 7133SA45JI operates as master in MASTER/SLAVE pair with IDT7143, synchronizing writes across redundant channels using BUSY handshake. Use Value: Achieves sub-microsecond state synchronization without FPGA glue logic or custom arbitration IP. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA45JI | No on-chip arbitration logic; BUSY is input-only (slave-only); identical pinout and timing | Used only as SLAVE in MASTER/SLAVE configurations; cannot operate stand-alone as arbitrator | Select when expanding bus width beyond 16 bits and offloading arbitration to a single 7133SA45JI master |
| CY7C133-45JC | Cypress part; 2K × 16, 45 ns, but lacks BUSY arbitration and uses different control signal naming (e.g., R/W vs. R/WLUB/R/WLLB) | Requires external arbitration logic for contention resolution; not drop-in compatible for BUSY-dependent designs | Choose only if arbitration is handled in FPGA or software, and pin compatibility with 7133SA45JI is not required |
Compared with IDT7143SA45JI and CY7C133-45JC, the 7133SA45JI uniquely integrates master arbitration logic and open-drain BUSY outputs - enabling self-contained, deterministic dual-CPU memory sharing without external components or timing margin compromises.
Availability
7133SA45JI is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics data acquisition, and redundant control system memory requiring stable component supply, long-term lifecycle support, and MIL-PRF-38535 QML-compliant reliability.
Supply support for 7133SA45JI 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, RF, and sensor solutions, now part of Renesas Electronics.
The IDT7133 family was designed for high-reliability embedded systems requiring deterministic dual-port memory access with hardware arbitration - targeting aerospace, industrial automation, and telecommunications infrastructure.
FAQ
What is the operating temperature range for the 7133SA45JI?
The 7133SA45JI is rated for industrial temperature operation from –40°C to +85°C, validated across all electrical specifications including tRC = 45 ns max, ISB1 ≤ 25 mA, and BUSY timing parameters. This makes it suitable for factory-floor controllers, transportation electronics, and outdoor communication equipment where ambient extremes are expected.
Does the 7133SA45JI support battery backup data retention?
No - the 7133SA45JI is the SA (Standard Active) variant and does not support battery backup. Only the LA variant (e.g., 7133LA45JI) provides 2 V data retention capability with ICCDR ≤ 4000 µA. The 7133SA45JI requires continuous 5 V ±10% supply for volatile operation.
How does BUSY arbitration work on the 7133SA45JI?
When both ports attempt to access the same memory address simultaneously, the 7133SA45JI's internal arbitration logic asserts BUSYL or BUSYR (open-drain) to stall the lower-priority port. The BUSY signal must be externally pulled up; it gates write operations on the contended side until the winning port completes its cycle - ensuring data coherency without software intervention.
Can the 7133SA45JI be used without BUSY logic?
Yes - BUSY logic is optional. To disable it, tie both BUSYL and BUSYR pins HIGH (via pull-ups). In this mode, concurrent writes to the same address result in undefined data, but the device functions as a standard dual-port RAM with full-speed independent access - useful when higher-layer protocols handle collision avoidance.
What package type is used for the 7133SA45JI?
The 7133SA45JI is supplied in a 68-pin plastic leaded chip carrier (PLCC), designated PLG68. Its footprint measures approximately 0.95 in × 0.95 in × 0.17 in, with dual VCC and dual GND pins requiring proper decoupling per datasheet layout guidelines to ensure signal integrity and power stability.
7133SA45JI 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:
- 32Kbit
- Memory Organization:
- 2K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 45ns
- Access Time:
- 45 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7133SA45JI FAQ
1.How can I place an order for 7133SA45JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA45JI 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 7133SA45JI reliable?
The price and inventory of 7133SA45JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA45JI is usually 5 days.
3.What payment methods are accepted for 7133SA45JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA45JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA45JI?
7133SA45JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA45JI 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 7133SA45JI?
For technical support, including 7133SA45JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA45JI requirements.
6.How does Aetrix verify that 7133SA45JI is sourced from the original manufacturer or authorized distributors?
All 7133SA45JI 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 7133SA45JI meets industry standards.
7.What is the process for return or replacement of 7133SA45JI?
All 7133SA45JI units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA45JI, 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 7133SA45JI part is unused and in its original packaging.
Return procedure for 7133SA45JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA45JI Tags
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AT24C02C-XHM-T
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