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Renesas 7133LA55PF
- Part No.:
- 7133LA55PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
7133LA55PF.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
7133LA55PF from IDT (Integrated Device Technology) is a high-speed 2K × 16-bit dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 55 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and battery backup data retention down to 2V. It enables concurrent asynchronous access from two independent ports in real-time embedded systems requiring deterministic memory arbitration.
For engineers reviewing the 7133LA55PF datasheet, 7133LA55PF pinout, 7133LA55PF application, or 7133LA55PF equivalent, this page delivers verified electrical specs, validated 68-pin PLCC package mapping, confirmed BUSY arbitration behavior, and direct alternatives for dual-port memory expansion in military-grade avionics, industrial PLCs, and telecom line cards.
Technical Context
The 7133LA55PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - left (L) and right (R) - enabling simultaneous read/write operations without internal synchronization overhead. Its on-chip arbitration logic resolves port contention via open-drain BUSYL/BUSYR outputs that assert when both ports access the same memory location.
As a MASTER device, it drives BUSY signals to coordinate with SLAVE IDT7143LA devices in 32-bit+ width expansions; BUSY timing parameters (e.g., tBAA ≤ 40 ns, tBDD ≤ 40 ns) are guaranteed for the 55 ns speed grade across industrial temperature (–40°C to +85°C). The LA variant reduces active power to 1050 mW (typ.) and standby current to 1 µA (typ.) at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16-bit (32,768 bits), dual-port SRAM with independent left/right addressing |
| Access Time (tRC) | 55 ns max - defines minimum read cycle interval for deterministic real-time response |
| Supply Voltage | 5.0 V ±10% - single-rail TTL compatibility; supports 2V data retention during battery backup |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Power Consumption | Active: 1050 mW typ.; Standby: 1 mW typ. - enables low-power hold mode in battery-backed systems |
| Arbitration Logic | On-chip port-to-port arbitration with BUSY output flag - eliminates need for external logic in contention management |
| Package | 68-pin PLCC (PLG68) - surface-mount compatible with standard reflow profiles and IPC-7351 land patterns |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC) package, top-view pinout with dual-port symmetry: left port (pins 1–34, 51–68) and right port (pins 35–50) share identical signal naming convention (e.g., A0L/A0R, I/O0L/I/O0R). Both VCC (pins 17, 35) and GND (pins 18, 36) require connection for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L / A0R–A10R | Address Inputs (Left/Right) | 11-bit address bus per port - selects one of 2K locations independently |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus (Left/Right) | 16-bit parallel I/O per port - supports byte-level writes via R/WLUB/R/WLLB controls |
| CEL / CER | Chip Enable (Left/Right) | Active-low enable - gates port access and controls automatic power-down into standby mode |
| R/WLUB / R/WRUB R/WLLB / R/WRLB | Upper/Lower Byte Write Enable | Independent write control per byte lane - enables partial-word updates without read-modify-write |
| OEL / OER | Output Enable (Left/Right) | Tri-states I/O drivers - allows bus sharing and prevents contention during inactive cycles |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | Indicates port contention - requires external pull-up; used to stall CPU or trigger interrupt on conflict |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port asynchronous operation | Enables true concurrent access - no clock required; critical for lock-free inter-processor communication |
| On-chip arbitration logic | Resolves same-address contention in hardware - eliminates software polling or external arbiter ICs |
| Master/Slave expandability | Supports 32-bit+ data width using IDT7143LA slaves - maintains full-speed operation without glue logic |
| 2V data retention | Preserves memory contents during main power loss - enables seamless battery backup in mission-critical systems |
| Low-power LA variant | Reduces standby current to 1 µA (typ.) - extends battery life in always-on monitoring applications |
Applications
| Avionics Flight Control System | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: Real-time exchange of sensor inputs and actuator commands between dual-redundant flight computers. IC Role / Device Role / Timing Role: MASTER dual-port RAM storing shared state variables with hardware-enforced arbitration to prevent conflicting writes. Use Value: Deterministic 55 ns access ensures sub-millisecond control loop timing; BUSY signaling guarantees atomic updates without software locks. |
Use Scenario: High-speed buffering of I/O scan data between programmable logic controller CPU and fieldbus interface modules. IC Role / Device Role / Timing Role: Dual-port memory acting as ping-pong buffer - one port accepts new scan data while the other feeds execution engine. Use Value: Asynchronous ports eliminate CPU wait states; 2V retention preserves last valid I/O state during brownout events. |
| Telecom Line Card Buffer | Military Radar Signal Processor |
Use Scenario: Temporary storage of packetized voice/data frames between network processor and DSP subsystem in TDM-over-IP gateways. IC Role / Device Role / Timing Role: Width-expanded 32-bit memory array built from 7133LA55PF (MASTER) + IDT7143LA (SLAVE) with synchronized BUSY arbitration. Use Value: Eliminates "busy lock-out" via MASTER/SLAVE topology; 68-pin PLCC supports high-density PCB layout in space-constrained line cards. |
Use Scenario: Storing intermediate FFT results and coefficient tables in airborne radar digital beamforming units operating under extreme thermal stress. IC Role / Device Role / Timing Role: Industrial-temperature-rated dual-port SRAM providing deterministic latency for pipelined signal processing algorithms. Use Value: Guaranteed –40°C to +85°C operation avoids thermal derating; low 1050 mW active power minimizes heat buildup in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143LA55PF | SLAVE-only variant; BUSY pins are inputs (not outputs); no on-chip arbitration logic | Used only in width-expansion configurations with a MASTER 7133LA; cannot operate stand-alone as arbitration node | Select when building 32-bit+ memory arrays where one 7133LA55PF coordinates multiple SLAVE devices |
| CY7C1335KV18-55BZC | 36-Mbit QDR SRAM; 18-bit interface; 550 MHz DDR interface; different timing model and control protocol | Targets high-bandwidth streaming applications (e.g., packet buffering), not deterministic dual-CPU sharing | Choose for throughput-critical designs requiring >1 Gbps sustained bandwidth; not drop-in compatible |
Compared with IDT7143LA55PF and CY7C1335KV18-55BZC, the 7133LA55PF uniquely provides on-chip arbitration, true asynchronous dual-port access, and 2V data retention - making it irreplaceable for safety-critical, low-latency, battery-backed shared memory architectures.
Availability
7133LA55PF is available at Aetrix Electronics and suitable for avionics flight control systems, industrial PLC memory buffers, and telecom line card buffers requiring stable component supply across extended product lifecycles.
Supply support for 7133LA55PF 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, RF, and sensor solutions, now part of Renesas Electronics since 2019.
The IDT7133/7143 family was designed specifically for real-time embedded systems requiring deterministic, contention-free shared memory between heterogeneous processors - targeting aerospace, defense, and industrial automation markets.
FAQ
What is the function of the BUSY pin on the 7133LA55PF?
The BUSY pin on the 7133LA55PF is an open-drain output that asserts when both left and right ports attempt to access the same memory location simultaneously. It signals contention to external logic or CPUs, allowing them to stall or retry - ensuring data integrity without software arbitration. The 7133LA55PF requires an external pull-up resistor on BUSYL and BUSYR to function correctly.
Can the 7133LA55PF operate with a 3.3V supply?
No, the 7133LA55PF is specified only for 5.0 V ±10% operation (4.5 V to 5.5 V). It is TTL-compatible and not 3.3V tolerant; applying 3.3V to VCC will result in undefined operation and failure to meet AC timing specifications such as the 55 ns tRC. For 3.3V dual-port SRAM, consider newer families like IDT70V25/70V27.
How does the 7133LA55PF differ from the SA version (e.g., 7133SA55PF)?
The 7133LA55PF uses low-power CMOS design achieving 1050 mW typical active power and 1 µA typical standby current, versus 1150 mW and 5 µA for the SA version. The LA variant also supports 2V data retention for battery backup, while the SA version does not guarantee retention below 4.5V. Both share identical timing, pinout, and functionality.
Is the 7133LA55PF pin-compatible with the 7143LA55PF?
Yes, the 7133LA55PF and 7143LA55PF have identical pinouts and package footprints (68-pin PLCC), but their BUSY pin functions differ: 7133LA55PF has BUSY as an open-drain output with arbitration logic, while 7143LA55PF has BUSY as an input-only pin for write inhibition. They are not functional drop-in replacements.
What temperature range is qualified for the 7133LA55PF?
The 7133LA55PF is qualified for the industrial temperature range of –40°C to +85°C. This rating is explicitly confirmed in the datasheet's "Maximum Operating Temperature and Supply Voltage" table and applies to all speed grades including the 55 ns variant. Military-grade versions (e.g., 7133LA55PFM) exist but require separate ordering.
7133LA55PF 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
7133LA55PF FAQ
1.How can I place an order for 7133LA55PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA55PF 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 7133LA55PF reliable?
The price and inventory of 7133LA55PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA55PF is usually 5 days.
3.What payment methods are accepted for 7133LA55PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA55PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA55PF?
7133LA55PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA55PF 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 7133LA55PF?
For technical support, including 7133LA55PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA55PF requirements.
6.How does Aetrix verify that 7133LA55PF is sourced from the original manufacturer or authorized distributors?
All 7133LA55PF 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 7133LA55PF meets industry standards.
7.What is the process for return or replacement of 7133LA55PF?
All 7133LA55PF units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA55PF, 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 7133LA55PF part is unused and in its original packaging.
Return procedure for 7133LA55PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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