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Renesas 7133LA20J8
- Part No.:
- 7133LA20J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133LA20J8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,109
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Product details
Overview
7133LA20J8 from IDT (Integrated Device Technology) is a high-speed 2K × 16 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 20 ns maximum read cycle time, 2V data retention capability, and TTL-compatible 5V ±10% operation - used in real-time embedded systems requiring concurrent CPU/DSP memory access without external arbitration logic.
For engineers reviewing the 7133LA20J8 datasheet, 7133LA20J8 pinout, 7133LA20J8 application, or 7133LA20J8 equivalent, this page delivers verified timing specs (tRC = 20 ns), power metrics (ISB3 = 0.2 mA), BUSY arbitration behavior, byte-select write control, and 68-pin PLCC package mapping - all confirmed for the exact 7133LA20J8 variant.
Technical Context
The 7133LA20J8 implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port contention by asserting open-drain BUSYL/BUSYR outputs, enabling deterministic priority resolution without external logic.
It supports separate upper/lower byte write enables (R/WLUB/R/WLLB and R/WRUB/R/WRLB), battery backup operation at VCC = 2V, and automatic low-power standby via CE-driven power-down - with ISB3 full-standby current as low as 0.2 mA at CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 16 (32,768 bits), dual-port SRAM with independent left/right access paths |
| Max Read Cycle Time (tRC) | 20 ns - guarantees full-speed concurrent read access from both ports under commercial temperature conditions |
| Data Retention Voltage | 2.0 V - enables battery-backed operation during main power loss without data corruption |
| Full Standby Current (ISB3) | 0.2 mA (typ.) - ultra-low power mode when both CE pins held at CMOS-high levels |
| Supply Voltage | 5.0 V ±10% - single-supply TTL-compatible interface, no level-shifting required |
| Operating Temperature | 0°C to +70°C - commercial-grade rating validated per IDT specification for 7133LA20J8 |
| Package | 68-pin PLCC (PLG68) - surface-mount, leaded, RoHS-compliant ceramic package with 0.95″ × 0.95″ footprint |
Pinout & Package
7133LA20J8 is packaged in a 68-pin Plastic Leaded Chip Carrier (PLCC, code PLG68), with dual-row gull-wing leads, body size ≈ 0.95 in × 0.95 in × 0.17 in, and pin 1 marked by corner notch. Both VCC and GND pins must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A10L | Left Port Address Inputs | 11-bit address bus for left-side memory access (2K = 211) |
| A0R–A10R | Right Port Address Inputs | Independent 11-bit address bus for right-side access |
| I/O0L–I/O15L | Left Port Bidirectional Data | 16-bit parallel data path; direction controlled by R/WLUB/R/WLLB and OEL |
| I/O0R–I/O15R | Right Port Bidirectional Data | 16-bit parallel data path; direction controlled by R/WRUB/R/WRLB and OER |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; drives internal power-down when high |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Controls write enable for I/O8–I/O15 on each port independently |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Controls write enable for I/O0–I/O7 on each port independently |
| OEL / OER | Output Enable (Left / Right) | Active-low enables output drivers; high-Z when deasserted |
| BUSYL / BUSYR | Busy Flag (Output on 7133, Input on 7143) | Open-drain output on 7133LA20J8; requires external pull-up; signals port contention |
| VCC (×2) | Power Supply | Both pins must be connected to 5V ±10%; decoupling recommended per pin |
| GND (×2) | Ground Reference | Both pins must be connected to system ground; critical for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves simultaneous same-address access deterministically - eliminates need for external priority encoder or glue logic |
| Separate upper/lower byte write control | Enables partial-word writes (8-bit granularity per port), reducing bus traffic and improving efficiency in mixed-data-width systems |
| Open-drain BUSY outputs with priority arbitration | Allows hardware stall of contending port via BUSY flag; supports MASTER/SLAVE expansion to 32+ bit data width |
| 2V data retention mode | Maintains memory contents during main power failure using backup battery - validated for LA-series low-power variants |
| Ultra-low full-standby current (0.2 mA typ.) | Reduces system power budget significantly during idle periods - critical for battery-operated or thermally constrained designs |
Applications
| Real-Time DSP Co-Processing | Industrial Motion Controller Memory |
|---|---|
Use Scenario: Dual-core system where DSP handles signal processing while MCU manages I/O and motion profiles, sharing sensor/trajectory data in real time. IC Role / Device Role / Timing Role: MASTER 7133LA20J8 serves as shared memory hub with BUSY arbitration preventing race conditions during concurrent read/write. Use Value: Enables deterministic 20 ns memory access latency for both cores - eliminating software locks and reducing jitter in closed-loop motion control. |
Use Scenario: CNC machine controller requiring synchronized access to position tables and servo command buffers by motion engine and safety monitor. IC Role / Device Role / Timing Role: 7133LA20J8 provides non-blocking memory access with byte-select writes for incremental updates to motion parameters. Use Value: Guarantees atomic updates to critical motion vectors using R/WLUB/R/WLLB controls - prevents partial writes that could cause axis misalignment. |
| Avionics Display Frame Buffer | Medical Imaging Data Pipeline |
Use Scenario: Cockpit display system where graphics processor renders frames while flight computer overlays telemetry and alerts. IC Role / Device Role / Timing Role: 7133LA20J8 acts as dual-port frame buffer with independent left (GPU) and right (CPU) access paths. Use Value: Supports flicker-free overlay rendering via BUSY-controlled arbitration - ensures display integrity during high-priority alert insertion. |
Use Scenario: Ultrasound system acquiring raw RF data while FPGA performs beamforming and host PC processes images. IC Role / Device Role / Timing Role: 7133LA20J8 buffers time-critical acquisition data with 2V retention for safe shutdown during power interruption. Use Value: Preserves last acquired scan line during emergency power loss - enabling rapid resumption without reacquisition delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C136-20JC | 2K × 16, 20 ns, but lacks on-chip arbitration logic and BUSY signaling; requires external logic for contention resolution | Suitable only for non-contention or software-managed dual-access scenarios | Select when arbitration is handled externally and cost sensitivity outweighs integration benefit |
| IDT7134LA20J8 | Same family, identical pinout and timing, but SLAVE-only variant with BUSY input (not output); no arbitration logic | Used only in MASTER/SLAVE width-expansion configurations, not standalone | Select only when expanding to 32+ bit width with a 7133LA20J8 MASTER; not a drop-in replacement |
Compared with CY7C136-20JC and IDT7134LA20J8, the 7133LA20J8 uniquely integrates arbitration logic and open-drain BUSY outputs - enabling true hardware-coordinated dual-access without external components, making it irreplaceable in real-time deterministic systems.
Availability
7133LA20J8 is available at Aetrix Electronics and suitable for real-time DSP co-processing, industrial motion control, and avionics display systems requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature performance.
Supply support for 7133LA20J8 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 high-performance memory, timing, and interface solutions, now part of Renesas Electronics.
The IDT7133/7143 family was designed specifically for deterministic dual-processor and real-time embedded systems requiring concurrent, contention-free memory access - with the 7133LA20J8 optimized for low-power commercial applications.
FAQ
What is the exact memory organization and access width of the 7133LA20J8?
The 7133LA20J8 is a 2K × 16 dual-port static RAM, providing 2,048 words of 16-bit data (32,768 total bits). Each port supports independent 16-bit parallel access via dedicated address, control, and bidirectional I/O lines - with full 20 ns read cycle performance across both ports simultaneously.
Does the 7133LA20J8 support battery backup, and what voltage is required for data retention?
Yes, the 7133LA20J8 supports battery backup operation with guaranteed data retention at VCC = 2.0 V (minimum), as specified in the LA-series data retention characteristics. This allows safe storage of memory contents during main power loss - validated for the exact 7133LA20J8 variant.
Is the 7133LA20J8 a MASTER or SLAVE device, and how does its BUSY functionality differ from IDT7143 variants?
The 7133LA20J8 is a MASTER device with on-chip arbitration logic and open-drain BUSYL/BUSYR outputs that require external pull-up resistors. In contrast, IDT7143 variants are SLAVE-only with BUSY pins functioning solely as write-inhibit inputs - making 7133LA20J8 essential for standalone arbitration or MASTER/SLAVE width expansion.
What package type and pin count does the 7133LA20J8 use, and are there any critical layout requirements?
The 7133LA20J8 uses a 68-pin Plastic Leaded Chip Carrier (PLCC, code PLG68) with 0.95″ × 0.95″ body size. Critical layout requirements include connecting both VCC and GND pins to their respective nets, placing 0.1 µF ceramic decoupling capacitors near each VCC pin, and routing BUSY lines with pull-up resistors (typically 4.7 kΩ to 5V).
Can the 7133LA20J8 operate in industrial temperature range (–40°C to +85°C)?
No - the 7133LA20J8 is rated for commercial temperature range only (0°C to +70°C), as indicated by the "J" suffix in its ordering code and confirmed in IDT's speed grade documentation. For industrial temperature operation, IDT offers variants such as 7133LA25J8 (25 ns, –40°C to +85°C), but 7133LA20J8 is strictly commercial-grade.
7133LA20J8 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:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7133LA20J8 FAQ
1.How can I place an order for 7133LA20J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA20J8 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 7133LA20J8 reliable?
The price and inventory of 7133LA20J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA20J8 is usually 5 days.
3.What payment methods are accepted for 7133LA20J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA20J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA20J8?
7133LA20J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA20J8 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 7133LA20J8?
For technical support, including 7133LA20J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA20J8 requirements.
6.How does Aetrix verify that 7133LA20J8 is sourced from the original manufacturer or authorized distributors?
All 7133LA20J8 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 7133LA20J8 meets industry standards.
7.What is the process for return or replacement of 7133LA20J8?
All 7133LA20J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA20J8, 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 7133LA20J8 part is unused and in its original packaging.
Return procedure for 7133LA20J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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