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Renesas 7133LA55PFI
- Part No.:
- 7133LA55PFI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133LA55PFI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,022
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Product details
Overview
7133LA55PFI from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 55 ns maximum read cycle time, industrial temperature range (–40°C to +85°C), and 1 mW typical standby power. It enables simultaneous asynchronous access from two independent ports and supports battery backup data retention at 2 V for embedded systems requiring nonvolatile SRAM behavior without external controllers.
For engineers reviewing the 7133LA55PFI datasheet, 7133LA55PFI pinout, 7133LA55PFI application, or 7133LA55PFI equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 35 ns), dual-byte write control per port, 68-pin PLCC package compatibility, and low-power LA-series operation in industrial environments.
Technical Context
The 7133LA55PFI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left and right ports. Its on-chip arbitration logic resolves contention via open-drain BUSYL/BUSYR signals, where the MASTER device asserts BUSY to stall conflicting writes on the opposing port.
It supports byte-level write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5 V ±10% operation, and automatic power-down via chip enable (CEL/CER). Data retention at 2 V is guaranteed, with full functionality restored within tR ≤ tRC after VCC recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 Kbit), organized as 2048 words × 16-bit dual-port array |
| Access Time | 55 ns max read cycle time (tRC), enabling 18.2 MHz sustained throughput per port |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V), compatible with legacy TTL and 5 V microcontroller buses |
| Standby Current | 1 mA typical (ISB3, both ports in CMOS-level standby), critical for battery-backed systems |
| Operating Temp | –40°C to +85°C (industrial grade), validated across full voltage and timing margins |
| Data Retention | 2 V minimum VCC for data retention, with ICCDR ≤ 4000 µA (MIL/IND), enabling coin-cell backup |
| Package | 68-pin PLCC (PLG68), footprint-compatible with PGA and flatpack variants of same family |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC, PLG68) package with 0.95″ × 0.95″ body and J-lead profile. Requires connection of both VCC (pins 17 & 51) and both GND (pins 26 & 43) for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address per port selects one of 2048 memory locations independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right) | 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 and disables internal circuitry for <1 mA ISB3 standby |
| R/WLUB / R/WLLB / R/WRUB / R/WRLB | Byte Write Enable (Upper/Lower, Left/Right) | Independent 8-bit write control per port-enables partial-word updates without read-modify-write |
| OEL / OER | Output Enable (Left/Right) | Active-low enables output drivers; overrides R/W state during reads |
| BUSYL / BUSYR | Busy Flag (Left/Right) | Open-drain output (MASTER) or input (SLAVE); indicates port contention and gates write pulses |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous access to identical addresses without external logic; eliminates race conditions in multi-CPU systems |
| Dual-byte write control | Enables atomic 8-bit updates to upper/lower bytes-critical for mixed-endian or packed-data protocols |
| 2 V data retention | Maintains stored data during main power loss using backup battery; no refresh or controller required |
| Asynchronous dual-port operation | Permits independent read/write cycles on each port with no clock synchronization overhead |
| Master/Slave expansion support | One 7133LA55PFI (MASTER) coordinates arbitration for multiple 7143LA devices, scaling bus width to 32+ bits |
Applications
| Industrial Motion Controller | Avionics Display Buffer |
|---|---|
Use Scenario: Real-time coordination between motion PLC and servo drive firmware via shared memory. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized data exchange buffer; left port interfaces PLC, right port interfaces drive ASIC. Use Value: 55 ns tRC and tBDD ≤ 35 ns ensure deterministic response under 20 kHz control loop timing. |
Use Scenario: Concurrent rendering engine and flight management system writing to shared graphics frame buffer. IC Role / Device Role / Timing Role: 7133LA55PFI serves as pixel/data coherency hub with BUSY arbitration preventing display corruption. Use Value: Open-drain BUSY outputs interface directly to ARINC-653-compliant interrupt controllers without level-shifting. |
| Medical Imaging Pipeline | Test Equipment Pattern Memory |
Use Scenario: High-speed acquisition FPGA streams sensor data while DSP core processes prior frame. IC Role / Device Role / Timing Role: Left port accepts raw ADC stream; right port supplies processed pixels to display controller. Use Value: 1 mW ISB3 standby enables low-power idle mode between imaging bursts without data loss. |
Use Scenario: Automated test system stores stimulus/response patterns for semiconductor ATE. IC Role / Device Role / Timing Role: Dual-port RAM holds pattern sets; tester controller and DUT interface simultaneously via dedicated ports. Use Value: 68-pin PLCC package allows direct socketing on aging test fixtures; pinout matches legacy IDT7133SA devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 7133SA55PFI | SA version: higher active current (1150 mW typ vs. 1050 mW), no 2 V data retention | Suitable only for mains-powered systems without battery backup requirement | Select when lower standby power is not needed and full-speed operation dominates duty cycle |
| 71V33SA55PFI | 3.3 V supply (not 5 V), different pinout, no BUSY arbitration logic, no industrial temp rating | Requires level-shifting and redesign; lacks contention resolution for multi-processor use | Choose only for new 3.3 V designs where legacy 5 V compatibility and hardware arbitration are unnecessary |
Compared with 7133SA55PFI and 71V33SA55PFI, the 7133LA55PFI uniquely delivers industrial-temperature operation, 2 V data retention, and integrated BUSY arbitration in a drop-in 68-pin PLCC footprint-making it irreplaceable for battery-backed, multi-CPU embedded systems requiring deterministic memory access.
Availability
7133LA55PFI is available at Aetrix Electronics and suitable for industrial motion control, avionics display buffering, and medical imaging pipeline applications requiring stable component supply across extended lifecycle commitments.
Supply support for 7133LA55PFI 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, contention-free dual-processor memory sharing in real-time embedded systems-prioritizing arbitration integrity, low-voltage retention, and industrial reliability over cost or density.
FAQ
What is the function of the BUSY pins on the 7133LA55PFI?
The BUSYL and BUSYR pins on the 7133LA55PFI serve as open-drain arbitration indicators. When both ports attempt simultaneous access to the same memory location, the on-chip logic asserts BUSY to stall the later-accessing port. This prevents data corruption and eliminates need for external semaphores. Pull-up resistors are mandatory on both BUSY lines for proper operation.
Does the 7133LA55PFI support true 2 V operation or only data retention at 2 V?
The 7133LA55PFI supports full functional operation down to 4.5 V, but guarantees data retention-i.e., static storage without corruption-when VCC drops to 2.0 V. During retention mode, all inputs must be held at valid logic levels (VIL ≤ 0.8 V or VIH ≥ 2.2 V), and ICCDR remains ≤ 4000 µA in industrial grade. Full read/write resumes within tR ≤ tRC after VCC rises above 4.5 V.
Can the 7133LA55PFI be used without BUSY arbitration in simple dual-CPU systems?
Yes-the 7133LA55PFI operates correctly without BUSY arbitration if both ports avoid concurrent access to identical addresses. In such cases, BUSYL and BUSYR may be tied HIGH (via pull-ups) to disable arbitration gating. However, this removes hardware protection against accidental contention, so software coordination or address partitioning becomes mandatory to prevent undetected data corruption.
What is the significance of "LA" in the 7133LA55PFI part number?
The "LA" suffix in 7133LA55PFI denotes the Low-Power Active/Standby variant: it draws 1050 mW typical active power and only 1 mW typical standby current (ISB3), versus 1150 mW/5 mW for the SA variant. The LA version also enables 2 V data retention, making it the only choice for battery-backed applications within the IDT7133 family.
Is the 7133LA55PFI pin-compatible with other packages in the 7133/7143 family?
Yes-the 7133LA55PFI shares identical pinout across 68-pin PLCC (PLG68), 68-pin ceramic PGA (GU68), and 68-pin flatpack (FP68) packages. The 100-pin TQFP (PNG100) variant has different pin assignments and is not pin-compatible. Migration between PLCC, PGA, and flatpack requires only PCB footprint change-not logic or layout redesign.
7133LA55PFI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- 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:
- 100-TQFP (14x14)
7133LA55PFI FAQ
1.How can I place an order for 7133LA55PFI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA55PFI 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 7133LA55PFI reliable?
The price and inventory of 7133LA55PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA55PFI is usually 5 days.
3.What payment methods are accepted for 7133LA55PFI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA55PFI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA55PFI?
7133LA55PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA55PFI 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 7133LA55PFI?
For technical support, including 7133LA55PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA55PFI requirements.
6.How does Aetrix verify that 7133LA55PFI is sourced from the original manufacturer or authorized distributors?
All 7133LA55PFI 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 7133LA55PFI meets industry standards.
7.What is the process for return or replacement of 7133LA55PFI?
All 7133LA55PFI units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA55PFI, 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 7133LA55PFI part is unused and in its original packaging.
Return procedure for 7133LA55PFI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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