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Renesas 7133SA45JI8
- Part No.:
- 7133SA45JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA45JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,657
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Product details
Overview
7133SA45JI8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 45 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous access from left and right ports in real-time embedded systems requiring deterministic memory contention resolution - such as digital signal processors interfacing with FPGA peripherals.
For engineers reviewing the 7133SA45JI8 datasheet, 7133SA45JI8 pinout, 7133SA45JI8 application, or 7133SA45JI8 equivalent, this page delivers verified timing parameters, BUSY arbitration behavior, byte-select write control, battery backup capability (2V data retention), and exact package mapping for PLCC-68 implementation.
Technical Context
The 7133SA45JI8 implements fully asynchronous dual-port architecture with independent address, control, and I/O buses per port. Its on-chip arbitration logic resolves simultaneous accesses to identical addresses by asserting open-drain BUSYL/BUSYR outputs - only the IDT7133 variant (including 7133SA45JI8) provides BUSY output; IDT7143 acts as slave with BUSY input.
It supports separate upper/lower byte write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), enabling granular 8-bit writes without masking logic. Power management includes four standby modes (ISB1–ISB4), with full CMOS-level standby current as low as 0.2 mA (typ.) for LA variants - though 7133SA45JI8 is SA-grade with 25 mA typical ISB1 at fMAX.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports independent 16-bit word access per port |
| Access Time | 45 ns max read cycle (tRC); defines minimum time between successive reads on same port |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V); single-rail TTL-compatible operation with no level-shifting required |
| Operating Temp | –40°C to +85°C (industrial grade); validated across full range for sustained reliability in harsh environments |
| Standby Current | 25 mA typ. (ISB1, both ports TTL-level disabled); critical for low-power idle states in battery-backed systems |
| Bus Interface | Dual 16-bit bidirectional I/O (I/O0L–I/O15L and I/O0R–I/O15R); enables true parallel port-to-port data transfer |
| Battery Retention | 2 V minimum VCC for data retention (LA variant only); 7133SA45JI8 does not support retention mode |
Pinout & Package
7133SA45JI8 is packaged in a 68-pin plastic leaded chip carrier (PLCC), 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 state and memory access enable per port |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Enables write to I/O8–I/O15; allows independent 8-bit writes without external byte masking |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Enables write to I/O0–I/O7; supports mixed-width transactions and partial-word updates |
| OEL / OER | Output Enable (L/R) | Controls I/O bus directionality; tri-states outputs when deasserted to prevent bus contention |
| BUSYL / BUSYR | Busy Flag (L/R output) | Open-drain arbitration signal; indicates port contention and gates write cycles on contested addresses |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address bus per port; selects one of 2K (2048) memory locations independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | Fully bidirectional 16-bit data path per port; supports simultaneous read/write across ports |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous same-address access deterministically - eliminates need for external priority encoder or software polling |
| Separate byte write control | Enables atomic 8-bit writes to upper/lower halves without read-modify-write cycles or external gating logic |
| Asynchronous dual-port operation | Permits independent, unsynchronized read/write sequences on left and right ports - essential for real-time inter-processor communication |
| Open-drain BUSY outputs | Allows wired-OR of multiple BUSY signals for system-wide contention interrupt generation without additional logic |
| TTL-compatible interface | Direct connection to legacy 5V microcontrollers, DSPs, and FPGAs without level translators or voltage regulators |
Applications
| Real-Time Digital Signal Processing | FPGA-CPU Co-Processing Interface |
|---|---|
|
Use Scenario: Dual-core DSP system where one core performs FFT computation while the other handles I/O buffering. IC Role / Device Role / Timing Role: 7133SA45JI8 serves as shared memory buffer with deterministic arbitration - left port connects to DSP core A, right port to core B. Use Value: 45 ns access time ensures pipeline continuity; BUSY logic prevents data corruption during concurrent access to coefficient tables. |
Use Scenario: FPGA-accelerated vision processing feeding results to an ARM-based host CPU via shared memory. IC Role / Device Role / Timing Role: 7133SA45JI8 acts as zero-copy frame buffer - FPGA writes processed image rows to left port, CPU reads via right port. Use Value: Independent 16-bit I/O paths eliminate serialization bottlenecks; asynchronous operation avoids clock domain synchronization overhead. |
| Military Radar Data Acquisition | Industrial Motion Controller Memory Hub |
|
Use Scenario: Radar front-end digitizing RF samples at 100 MSPS while host processor performs pulse compression. IC Role / Device Role / Timing Role: 7133SA45JI8 functions as ping-pong buffer - ADC streams into left port, DSP reads from right port with precise timing alignment. Use Value: Industrial temperature rating (–40°C to +85°C) ensures operation in avionics enclosures; 45 ns tRC supports sustained 22 MB/s throughput per port. |
Use Scenario: Multi-axis servo controller synchronizing position feedback from encoders and issuing PWM commands to drivers. IC Role / Device Role / Timing Role: 7133SA45JI8 provides shared parameter table - motion planner writes trajectory points to left port, servo cores read via right port. Use Value: Separate byte write enables efficient update of individual axis parameters; CE-controlled power-down reduces thermal load during idle cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143SA45JI8 | SLAVE-only variant; BUSY pins are inputs (not outputs); no on-chip arbitration logic | Requires external master (e.g., 7133SA45JI8) for width expansion; used only in 32+ bit systems with master/slave topology | Select when building wide-bus systems where 7133SA45JI8 serves as master and additional memory width is needed |
| CY7C133-45JC | 45 ns access, 2K × 16, but lacks BUSY arbitration; uses semaphore flag instead of hardware BUSY signaling | No automatic write inhibition on contention - requires software coordination or external logic for safe multi-processor access | Choose for cost-sensitive designs where deterministic hardware arbitration is not required and software-managed access suffices |
Compared with IDT7143SA45JI8, the 7133SA45JI8 provides autonomous arbitration and BUSY output capability essential for standalone dual-processor systems; versus CY7C133-45JC, it delivers hardware-enforced contention resolution without firmware overhead or external components.
Availability
7133SA45JI8 is available at Aetrix Electronics and suitable for real-time digital signal processing, FPGA-CPU co-processing interfaces, and military radar data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7133SA45JI8 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 with sub-50 ns latency and industrial reliability.
FAQ
What is the function of the BUSY pin on the 7133SA45JI8?
The BUSY pin on the 7133SA45JI8 is an open-drain output that signals port contention when both left and right ports attempt simultaneous access to the same memory address. It gates write operations on the contended port until arbitration completes, preventing data corruption. External pull-up resistors are required for proper logic-level operation.
Does the 7133SA45JI8 support battery backup data retention?
No, the 7133SA45JI8 does not support battery backup data retention. That feature is exclusive to LA-grade variants (e.g., 7133LA45JI8), which specify 2 V minimum VCC for data retention. The 'SA' suffix denotes standard active power consumption and excludes retention circuitry.
Can the 7133SA45JI8 operate with only one port enabled?
Yes, the 7133SA45JI8 supports independent port operation. Either port can be fully enabled (CEL or CER = LOW) while the other remains in standby (CE = HIGH), drawing only ISB1 current (25 mA typ.). This enables flexible power partitioning in asymmetric multi-processor architectures.
What package type is used for the 7133SA45JI8?
The 7133SA45JI8 is supplied in a 68-pin plastic leaded chip carrier (PLCC) package, with dimensions approximately 0.95 in × 0.95 in × 0.17 in. Pin 1 location and top-view layout match the IDT PLG68 mechanical drawing referenced in the datasheet.
How does the 7133SA45JI8 differ from the IDT7143 series?
The 7133SA45JI8 is a MASTER dual-port RAM with on-chip arbitration logic and BUSY output capability, whereas IDT7143 devices are SLAVE-only with BUSY inputs and no arbitration. The 7133SA45JI8 can operate stand-alone; IDT7143 requires pairing with a 7133 to form a wider bus.
7133SA45JI8 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:
- 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)
7133SA45JI8 FAQ
1.How can I place an order for 7133SA45JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA45JI8 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 7133SA45JI8 reliable?
The price and inventory of 7133SA45JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA45JI8 is usually 5 days.
3.What payment methods are accepted for 7133SA45JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA45JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA45JI8?
7133SA45JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA45JI8 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 7133SA45JI8?
For technical support, including 7133SA45JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA45JI8 requirements.
6.How does Aetrix verify that 7133SA45JI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA45JI8 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 7133SA45JI8 meets industry standards.
7.What is the process for return or replacement of 7133SA45JI8?
All 7133SA45JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA45JI8, 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 7133SA45JI8 part is unused and in its original packaging.
Return procedure for 7133SA45JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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