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Renesas 7133LA25JI
- Part No.:
- 7133LA25JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133LA25JI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,332
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Product details
Overview
7133LA25JI from IDT (Integrated Device Technology) is a high-speed, low-power 2K × 16 dual-port static RAM designed as a MASTER device with on-chip arbitration logic and open-drain BUSY output. It supports independent asynchronous access from left/right ports, delivers 25ns max read cycle time, operates across –40°C to +85°C industrial temperature range, and enables battery backup data retention at 2V - used in real-time inter-processor communication systems requiring deterministic contention resolution.
For engineers reviewing the 7133LA25JI datasheet, 7133LA25JI pinout, 7133LA25JI application, or 7133LA25JI equivalent, this page provides verified functional identity, validated 68-pin PLCC package mapping, confirmed dual-port timing parameters (tRC = 25ns, tAA = 25ns), industrial-grade DC/AC specs, and two technically documented alternative parts for width-expansion memory subsystems.
Technical Context
The 7133LA25JI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves simultaneous access to identical memory locations by asserting BUSYL/BUSYR flags, enabling deterministic priority-based conflict handling without external logic.
As a MASTER device, it features open-drain BUSY outputs requiring pull-up resistors and supports width expansion with SLAVE IDT7143LA devices. Each port has independent byte-level write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5V ±10% supply, and automatic power-down via CE control - delivering 1mW standby current in LA configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768-bit total), organized as 2048 words × 16-bit wide |
| Access Time (tRC) | 25 ns maximum - defines minimum read cycle interval for guaranteed valid data |
| Supply Voltage | 5.0 V ±10% - single-rail TTL-compatible operation; no dual-supply required |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Standby Current (ISB3) | 0.2 mA typical - ultra-low full-standby power when both CE pins held high |
| Data Retention Voltage | 2.0 V minimum - retains stored data during brown-out or battery-backup mode |
| Package | 68-pin PLCC (PLG68) - surface-mount compatible with standard reflow profiles |
Pinout & Package
68-pin Plastic Leaded Chip Carrier (PLCC) package with 0.050″ lead pitch, body size ≈ 0.95″ × 0.95″ × 0.17″. Both VCC and GND pins require connection to ensure reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left-side memory access (2048 locations) |
| A0R–A10R | Right Port Address Inputs | 11-bit address bus for right-side memory access |
| I/O0L–I/O15L | Left Port Bidirectional Data | 16-bit data path; direction controlled by R/WLUB/R/WLLB and OEL |
| I/O0R–I/O15R | Right Port Bidirectional Data | 16-bit data path; direction controlled by R/WRUB/R/WRLB and OER |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; controls power-down entry/exit |
| R/WLUB / R/WRUB | Upper Byte Write Enable | Controls write to I/O8–I/O15 on left/right port independently |
| R/WLLB / R/WRLB | Lower Byte Write Enable | Controls write to I/O0–I/O7 on left/right port independently |
| OEL / OER | Output Enable (Left / Right) | Active-low enables data output drivers; high-Z when disabled |
| BUSYL / BUSYR | Busy Flag (Open-Drain Output) | Indicates port contention; requires external pull-up resistor |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10% for stable operation |
| GND (×2) | Ground | Both pins must be connected to system ground for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous left/right port access to same address without external circuitry |
| Independent byte-write control | Enables partial-word writes (upper/lower 8-bit bytes) per port, reducing bus traffic |
| 2V data retention | Maintains stored contents during main power loss using backup battery or capacitor |
| Low-power LA variant | 1050 mW active / 1 mW standby typical - 10× lower standby vs. SA version |
| MASTER/SLAVE expandability | Supports 32-bit+ data bus width using IDT7143LA slaves with shared BUSY signaling |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processing Buffering |
|---|---|
Use Scenario: Two microcontrollers exchange status and command data via shared memory without software handshaking. IC Role / Device Role / Timing Role: MASTER 7133LA25JI acts as synchronized memory hub with hardware arbitration preventing race conditions. Use Value: Eliminates CPU polling or interrupt overhead; guarantees deterministic response under worst-case contention. |
Use Scenario: DSP core writes processed audio samples while host processor reads them for storage or display. IC Role / Device Role / Timing Role: Dual-port RAM serves as zero-wait-state ping-pong buffer between asymmetric processors. Use Value: Enables continuous streaming at 40 MB/s (25ns cycle × 16-bit bus), avoiding FIFO overflow or underrun. |
| Industrial Motion Control | Avionics Data Acquisition |
Use Scenario: PLC controller updates motor position setpoints while motion ASIC reads them for closed-loop servo execution. IC Role / Device Role / Timing Role: 7133LA25JI provides deterministic, low-latency parameter exchange with hardware BUSY flag for fault detection. Use Value: Ensures sub-microsecond synchronization between safety-critical control loops and supervisory logic. |
Use Scenario: Flight sensor data (IMU, pressure, temp) captured by ADC controller and read by flight management unit. IC Role / Device Role / Timing Role: Industrial-temp-rated dual-port RAM buffers time-stamped telemetry with battery-backed retention. Use Value: Preserves last-known state during power interruption - critical for post-failure diagnostics and black-box logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143LA25JI | SLAVE-only device; BUSY pins are inputs only; no arbitration logic; identical timing and pinout | Used only in width-expanded systems paired with 7133LA25JI; cannot operate standalone as MASTER | Select when building 32-bit+ memory arrays where one 7133LA25JI coordinates multiple 7143LA25JI units |
| CY7C133-25JC | 2K × 16 dual-port SRAM from Cypress; 25ns access; no built-in arbitration; requires external BUSY logic | Needs discrete gates or CPLD for contention resolution; higher BOM count and layout complexity | Choose only if legacy design reuse or vendor consolidation mandates Cypress footprint |
Compared with IDT7143LA25JI, the 7133LA25JI provides autonomous arbitration and BUSY output capability essential for standalone dual-CPU systems; compared with CY7C133-25JC, it eliminates external arbitration components and reduces PCB area and signal routing risk.
Availability
7133LA25JI is available at Aetrix Electronics and suitable for real-time inter-processor communication, industrial motion control, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7133LA25JI 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, acquired by Renesas Electronics in 2019.
The IDT7133/7143 family was engineered for deterministic, low-latency memory sharing between heterogeneous processors in industrial, aerospace, and telecom infrastructure - prioritizing hardware arbitration and robustness over density or cost.
FAQ
What is the function of the BUSY pin on the 7133LA25JI?
The BUSY pin on the 7133LA25JI is an open-drain output that signals port contention when both left and right ports attempt simultaneous access to the same memory location. It requires an external pull-up resistor and is used to stall the contending port's operation until the winning port completes its cycle - ensuring data integrity without software intervention. This behavior is intrinsic to the 7133LA25JI's MASTER role.
Can the 7133LA25JI operate without external pull-up resistors on BUSY pins?
No - the BUSY pins (BUSYL and BUSYR) on the 7133LA25JI are open-drain outputs and will not drive a valid HIGH level without external pull-up resistors. Per the datasheet, failure to connect pull-ups results in undefined BUSY signaling, leading to potential bus lock-up or corrupted writes during contention. Typical values are 4.7kΩ to VCC.
Does the 7133LA25JI support true simultaneous read operations from both ports?
Yes - the 7133LA25JI supports fully asynchronous, simultaneous reads from left and right ports to different or identical addresses without BUSY assertion. BUSY is only activated during simultaneous read/write or write/write contention to the same address. Independent read cycles do not interfere and meet tRC = 25ns timing unconditionally.
How does the 7133LA25JI achieve 2V data retention?
The 7133LA25JI achieves 2V data retention through optimized CMOS cell design and reduced standby leakage. When both CE pins are driven HIGH and VCC drops to ≥2.0V, internal circuitry maintains stored bit states with ICCDR ≤ 4000 µA (typical 100 µA). This enables operation from backup batteries or hold-up capacitors during main power loss - a key feature of the LA variant.
Is the 7133LA25JI pin-compatible with the SA speed grade?
Yes - the 7133LA25JI shares identical pinout, package (68-pin PLCC), and functional signal mapping with all IDT7133SA/LA variants including 7133SA25JI. The 'LA' suffix denotes low-power design (lower active/standby current), while 'SA' indicates standard power; both operate at 25ns speed grade and are mechanically and electrically interchangeable in existing layouts.
7133LA25JI 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:
- 25ns
- Access Time:
- 25 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)
7133LA25JI FAQ
1.How can I place an order for 7133LA25JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA25JI 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 7133LA25JI reliable?
The price and inventory of 7133LA25JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA25JI is usually 5 days.
3.What payment methods are accepted for 7133LA25JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA25JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA25JI?
7133LA25JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA25JI 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 7133LA25JI?
For technical support, including 7133LA25JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA25JI requirements.
6.How does Aetrix verify that 7133LA25JI is sourced from the original manufacturer or authorized distributors?
All 7133LA25JI 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 7133LA25JI meets industry standards.
7.What is the process for return or replacement of 7133LA25JI?
All 7133LA25JI units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA25JI, 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 7133LA25JI part is unused and in its original packaging.
Return procedure for 7133LA25JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA25JI Tags
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