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Renesas 7133SA55JI8
- Part No.:
- 7133SA55JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133SA55JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
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Product details
Overview
7133SA55JI8 from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 55 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 left/right ports in real-time embedded systems requiring deterministic memory contention resolution - such as dual-CPU communication buffers or video frame store controllers.
For engineers reviewing the 7133SA55JI8 datasheet, 7133SA55JI8 pinout, 7133SA55JI8 application, or 7133SA55JI8 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 7133SA55JI8 implements fully asynchronous dual-port architecture with separate 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 this part) provides BUSY output; IDT7143 acts as slave with BUSY input.
It supports byte-level write enable (R/WLUB/R/WLLB for left port; R/WRUB/R/WRLB for right port), independent chip enable (CEL/CER), and output enable (OEL/OER). Power management includes TTL-level standby (ISB1 = 25 mA typ.) and CMOS-level full standby (ISB3 = 1.0 mA typ.), with 2V data retention in LA variants - though 7133SA55JI8 is SA-grade (active power 1150 mW typ.).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total), organized as 2048 words × 16-bit wide |
| Access Time | 55 ns maximum read cycle time (tRC), enabling 18.2 MHz sustained dual-port throughput |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), single-rail TTL-compatible interface |
| Operating Temperature | –40°C to +85°C (industrial grade), validated across full range |
| Power Consumption | 1150 mW typical active, 5 mW typical standby - optimized for low-latency embedded buffering |
| Arbitration Logic | On-chip port-to-port BUSY flag generation with tBDD ≤35 ns delay to valid data |
| Data Retention | Not supported - SA variant lacks battery backup; LA variant required for 2V retention |
Pinout & Package
7133SA55JI8 is packaged in 68-pin PLCC (PLG68), body size ≈0.95″ × 0.95″ × 0.17″, with dual VCC and GND pins requiring connection for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A11R | Address Inputs (Left/Right) | 11-bit address per port selects one of 2048 locations; independent decoding per side |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus | 16-bit parallel I/O per port; high-impedance when CE or OE inactive |
| CEL / CER | Chip Enable (Left/Right) | Active-low enables port access; controls power-down mode when high |
| R/WLUB / R/WLLB / R/WRUB / R/WRLB | Byte Write Enable | Separate upper/lower byte write control per port - enables 8-bit granularity writes |
| OEL / OER | Output Enable (Left/Right) | Active-low enables data output drivers; independent of CE state |
| BUSYL / BUSYR | Busy Flag (Output only on 7133) | Open-drain outputs require external pull-up; signal contention on matching addresses |
| VCC(1), VCC(2) | Power Supply | Both pins must be connected to 5V ±10%; decoupling recommended at each |
| GND(1), GND(2) | Ground Reference | Both pins must be connected to system ground; reduces noise coupling between ports |
Key Features
| Feature | Design Value |
|---|---|
| Master arbitration logic | Enables deterministic resolution of simultaneous left/right port accesses to same address - eliminates software polling |
| Independent byte write control | Permits 8-bit updates without disturbing adjacent bytes - critical for protocol register overlays |
| Fully asynchronous dual-port operation | Zero wait-state reads/writes from either port; no clock or synchronization required |
| TTL-compatible interface | Direct interfacing with legacy microcontrollers and FPGAs without level-shifting circuitry |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for motor drives, avionics, and base station equipment |
Applications
| Real-Time Dual-CPU Communication Buffer | Video Frame Store Controller |
|---|---|
Use Scenario: Two independent processors exchange status, commands, and telemetry via shared memory without bus locking or software arbitration. IC Role / Device Role / Timing Role: 7133SA55JI8 serves as the contention-managed shared buffer; BUSY signals stall writes during address collision, ensuring data integrity. Use Value: Eliminates need for external arbitration logic or semaphore registers - reduces BOM count and PCB area while guaranteeing atomic access. |
Use Scenario: A video capture engine writes frames while a display controller reads previous frames, both operating at different pixel clocks. IC Role / Device Role / Timing Role: 7133SA55JI8 provides non-blocking dual-port access; left port accepts incoming YUV422 data, right port feeds outgoing RGB888 stream. Use Value: Enables seamless frame pipelining with zero inter-frame latency - critical for 60 fps HD video processing. |
| Industrial PLC I/O Mapping Memory | Digital Signal Processor Co-Processor Interface |
Use Scenario: Programmable logic controller uses dual-port RAM to isolate real-time I/O scan cycles from configuration update cycles. IC Role / Device Role / Timing Role: 7133SA55JI8 stores mapped I/O states; left port updated by scan logic, right port read by HMI or network stack. Use Value: Guarantees consistent snapshot reads during live I/O updates - prevents torn-word reads in safety-critical motion control loops. |
Use Scenario: DSP offloads FFT computation while host MCU manages peripheral control and result post-processing. IC Role / Device Role / Timing Role: 7133SA55JI8 holds coefficient tables and intermediate buffers; DSP writes results, MCU reads completion flags and data. Use Value: Enables lock-free handshaking using BUSY-driven interrupts - achieves sub-microsecond response to computation completion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-55AXC | 3.3V core, 55 ns access, 2K × 16, no built-in BUSY arbitration - requires external logic for contention handling | Suitable for 3.3V systems where arbitration is implemented in FPGA or ASIC | Select when migrating to lower-voltage design and external arbitration is acceptable |
| IDT7143SA55JI8 | Same speed/package, but SLAVE-only: BUSY pins are inputs (not outputs); no on-chip arbitration logic | Used only in MASTER/SLAVE configurations with 7133 as master; cannot operate standalone as arbitrator | Select only when expanding data bus width beyond 16 bits using multiple chips with centralized arbitration |
Compared with CY7C1362BV33-55AXC and IDT7143SA55JI8, the 7133SA55JI8 uniquely integrates master arbitration logic and open-drain BUSY outputs - eliminating external components for deterministic contention resolution in standalone dual-CPU or real-time I/O applications.
Availability
7133SA55JI8 is available at Aetrix Electronics and suitable for real-time dual-CPU communication buffers, industrial PLC I/O mapping, and video frame store controllers requiring stable component supply and long-term obsolescence management.
Supply support for 7133SA55JI8 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 since 2019.
The IDT7133/7143 family was designed for deterministic, low-latency dual-processor memory sharing in military, industrial, and telecom infrastructure - emphasizing hardware arbitration, wide temperature operation, and pin-compatible scalability.
FAQ
What is the function of BUSYL and BUSYR on the 7133SA55JI8?
The BUSYL and BUSYR pins on the 7133SA55JI8 are open-drain outputs that assert low when a port-to-port address conflict occurs - indicating the corresponding port is blocked from writing. These signals require external pull-up resistors and enable hardware-stalled writes without CPU intervention. Unlike the SLAVE IDT7143, the 7133SA55JI8 generates BUSY; it does not accept BUSY as input.
Does the 7133SA55JI8 support battery backup data retention?
No, the 7133SA55JI8 is an SA-grade device and does not support battery backup data retention. Only LA-grade variants (e.g., 7133LA55JI8) provide 2V data retention capability with typical ICCDR of 100 µA. The SA version prioritizes higher speed and active power efficiency over low-voltage retention.
Can the 7133SA55JI8 operate with mixed voltage interfaces?
No - the 7133SA55JI8 is strictly a 5V ±10% device (4.5–5.5 V) with TTL-compatible input thresholds (VIH ≥2.2 V, VIL ≤0.8 V). It does not support 3.3V or 2.5V logic levels directly; level translation is required for interfacing with lower-voltage controllers or FPGAs.
How does the 7133SA55JI8 handle simultaneous writes to the same address from both ports?
When both ports attempt to write to the same address, the 7133SA55JI8's on-chip arbitration logic asserts BUSYL and/or BUSYR to stall the later-arriving write. The winning port proceeds; the stalled port's R/W signal is internally gated. This behavior is deterministic and governed by tAPS (5 ns priority setup time) - no external logic is needed.
What package type is used for the 7133SA55JI8, and are both VCC pins mandatory?
The 7133SA55JI8 uses a 68-pin PLCC (PLG68) package. Both VCC pins (pins 17 and 35) must be connected to the 5V supply - failure to do so risks unreliable operation or excessive current draw. Similarly, both GND pins (pins 36 and 68) must be tied to system ground per manufacturer specification.
7133SA55JI8 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:
- 55ns
- Access Time:
- 55 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)
7133SA55JI8 FAQ
1.How can I place an order for 7133SA55JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133SA55JI8 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 7133SA55JI8 reliable?
The price and inventory of 7133SA55JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133SA55JI8 is usually 5 days.
3.What payment methods are accepted for 7133SA55JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133SA55JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133SA55JI8?
7133SA55JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133SA55JI8 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 7133SA55JI8?
For technical support, including 7133SA55JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133SA55JI8 requirements.
6.How does Aetrix verify that 7133SA55JI8 is sourced from the original manufacturer or authorized distributors?
All 7133SA55JI8 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 7133SA55JI8 meets industry standards.
7.What is the process for return or replacement of 7133SA55JI8?
All 7133SA55JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133SA55JI8, 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 7133SA55JI8 part is unused and in its original packaging.
Return procedure for 7133SA55JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133SA55JI8 Tags
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