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Renesas 7133LA70JI
- Part No.:
- 7133LA70JI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133LA70JI.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,453
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Product details
Overview
7133LA70JI from IDT is a high-speed 2K × 16 dual-port static RAM with master arbitration logic, 70 ns max read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous access from two independent ports and supports bus-width expansion in real-time control systems requiring deterministic memory arbitration.
For engineers reviewing the 7133LA70JI datasheet, 7133LA70JI pinout, 7133LA70JI application, or 7133LA70JI equivalent, this page delivers verified timing specs, byte-level write control, BUSY arbitration behavior, low-power standby current (1 µA typ.), and package-specific pin mapping for reliable integration into dual-CPU or FPGA co-processor memory subsystems.
Technical Context
The 7133LA70JI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention when both ports access the same memory location, asserting open-drain BUSY flags to stall the lower-priority port.
It supports independent upper/lower byte write enable (R/WLUB/R/WLLB and R/WRUB/R/WRLB), TTL-compatible 5V ±10% supply, and battery backup mode with 2V VCC retention - all validated for industrial-grade reliability across –40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32 KB total, organized as 2048 words × 16-bit wide) |
| Max Read Cycle Time | 70 ns - defines minimum time between successive reads on same port |
| Active Current (Typ.) | 1050 mW at 5V - determines thermal budget and power supply sizing |
| Standby Current (Typ.) | 1 µA - enables ultra-low-power hold mode during CPU sleep or watchdog timeout |
| Data Retention Voltage | 2.0 V - allows backup from coin cell or supercapacitor without regulator |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded control and motor drives |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V logic rails and legacy backplanes |
Pinout & Package
7133LA70JI is packaged in a 68-pin PLCC (PLG68) with 2×34-pin staggered layout. Both VCC and GND pins must be connected for stable operation; unused pins are not internally tied.
| 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 | Independent 11-bit address bus for right-side 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; independent of left port timing and control |
| CEL / CER | Chip Enable (Left / Right) | Active-low enables port logic; high = standby (1 µA typ.) |
| R/WLUB / R/WLLB | Left Upper/Lower Byte Write Enable | Enables write to I/O8–I/O15 or I/O0–I/O7 independently |
| R/WRUB / R/WRLB | Right Upper/Lower Byte Write Enable | Same per-byte control on right port for mixed-width transfers |
| OEL / OER | Output Enable (Left / Right) | Controls tristate of I/O drivers; overrides R/W state during reads |
| BUSYL / BUSYR | Busy Flag (Output / Input) | BUSYL is open-drain output (requires pull-up); BUSYR is input for slave-mode arbitration |
Key Features
| Feature | Design Value |
|---|---|
| On-chip port arbitration logic | Resolves simultaneous same-address access without external logic; prevents data corruption via BUSY-driven stall |
| Separate upper/lower byte write control | Enables 8-bit updates within 16-bit word without read-modify-write cycles - critical for register-mapped peripherals |
| 2V data retention mode | Maintains memory contents during main power loss using backup source - eliminates need for external NVSRAM or EEPROM |
| Industrial temperature rating | Validated operation from –40°C to +85°C - suitable for factory automation, transportation, and outdoor equipment |
| Master/Slave bus expansion support | One 7133LA70JI acts as MASTER (BUSY output); multiple IDT7143LA units act as SLAVE (BUSY input) for 32+ bit data paths |
Applications
| Real-Time Motion Control | Dual-CPU Communication Buffer |
|---|---|
Use Scenario: Two microcontrollers coordinate servo positioning: one handles trajectory planning, the other executes PWM timing. IC Role / Device Role / Timing Role: 7133LA70JI serves as shared memory with deterministic arbitration - left port for planner CPU, right port for executor CPU. Use Value: 70 ns access enables sub-100 µs inter-processor handshaking; BUSY logic prevents race conditions during joint register updates. |
Use Scenario: An ARM host processor offloads real-time signal processing to a dedicated DSP, sharing sensor buffers and command queues. IC Role / Device Role / Timing Role: 7133LA70JI provides zero-wait-state dual-access memory; each processor owns one port with full 16-bit bandwidth. Use Value: Eliminates software semaphores and polling overhead; 1 µA standby current extends battery life in portable test equipment. |
| FPGA Co-Processor Interface | Industrial PLC Memory Expansion |
Use Scenario: FPGA implements custom protocol engine while MCU manages HMI and diagnostics; both require concurrent access to shared configuration tables. IC Role / Device Role / Timing Role: 7133LA70JI acts as glueless interface - FPGA uses left port for burst writes, MCU uses right port for polled reads. Use Value: Byte-selectable writes reduce FPGA logic resource usage; 2V retention preserves config during FPGA reconfiguration. |
Use Scenario: Legacy PLC adds motion control capability via expansion module requiring deterministic shared memory between safety controller and motion ASIC. IC Role / Device Role / Timing Role: 7133LA70JI deployed as master in 32-bit-wide array (with IDT7143LA slaves) for synchronized I/O image exchange. Use Value: Master arbitration ensures no deadlock during cyclic scan overlap; industrial temp rating matches DIN rail enclosure requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7143LA70JI | No on-chip arbitration logic; BUSY pin is input-only; identical timing and power specs | Suitable only as SLAVE in master/slave arrays; cannot operate standalone as arbitration node | Select when expanding bus width beyond 16 bits and using 7133LA70JI as sole master |
| CY7C1335KV18-70BZC | 18-bit bus width, 70 ns, QDR architecture; no BUSY arbitration; requires external logic for contention resolution | Targeted at high-throughput networking buffers, not deterministic real-time control | Choose for higher bandwidth where arbitration is handled in firmware or FPGA logic |
Compared with IDT7143LA70JI and CY7C1335KV18-70BZC, the 7133LA70JI uniquely integrates hardware arbitration and retains data at 2V - making it the only option for self-contained, fail-safe dual-CPU memory sharing in industrial environments without external glue logic.
Availability
7133LA70JI is available at Aetrix Electronics and suitable for real-time motion control, dual-CPU communication buffers, FPGA co-processor interfaces, and industrial PLC memory expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7133LA70JI 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 dual-processor systems requiring hardware-enforced memory arbitration and battery-backed data retention - targeting industrial automation, avionics, and test equipment.
FAQ
What is the function of the BUSY pin on the 7133LA70JI?
The BUSYL pin on the 7133LA70JI is an open-drain output that signals port contention when both left and right ports attempt to access the same memory location simultaneously. It stalls the lower-priority port until the higher-priority access completes. The 7133LA70JI requires an external pull-up resistor on BUSYL to function correctly, unlike the BUSYR input on IDT7143LA devices.
Does the 7133LA70JI support true simultaneous read/write operations?
Yes - the 7133LA70JI supports fully asynchronous, independent read and write operations on left and right ports. However, if both ports target the same address, the on-chip arbitration logic asserts BUSYL to prevent data corruption. Valid simultaneous operations include left-port read + right-port write to different addresses, or byte-selective writes using R/WLUB/R/WLLB and R/WRUB/R/WRLB.
Can the 7133LA70JI operate with a 3.3V supply?
No - the 7133LA70JI is specified only for 5.0V ±10% (4.5V to 5.5V) operation. Its inputs are TTL-compatible with VIH ≥ 2.2V and VIL ≤ 0.8V, but internal circuitry requires 5V for correct timing and data retention. For 3.3V systems, level translation or selection of a modern low-voltage dual-port SRAM is required.
How does the 7133LA70JI achieve 2V data retention?
The 7133LA70JI enters data retention mode when VCC drops below 2.0V while CE remains high. In this state, internal circuitry reduces current draw to ≤4000 µA (typ. 100 µA), preserving stored data without refresh. This feature is exclusive to LA-series parts and is validated per JEDEC JESD22-A107; no external capacitor or backup controller is needed.
Is the 7133LA70JI pin-compatible with other speed grades in the 7133LA family?
Yes - all 7133LA variants (e.g., 7133LA25JI, 7133LA45JI, 7133LA70JI) share identical 68-pin PLCC pinout, electrical interface, and functional behavior. Speed grade affects only timing parameters (tRC, tAA, etc.); no PCB redesign is needed when upgrading or downgrading within the LA series for thermal or cost optimization.
7133LA70JI 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:
- 70ns
- Access Time:
- 70 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)
7133LA70JI FAQ
1.How can I place an order for 7133LA70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA70JI 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 7133LA70JI reliable?
The price and inventory of 7133LA70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA70JI is usually 5 days.
3.What payment methods are accepted for 7133LA70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA70JI?
7133LA70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA70JI 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 7133LA70JI?
For technical support, including 7133LA70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA70JI requirements.
6.How does Aetrix verify that 7133LA70JI is sourced from the original manufacturer or authorized distributors?
All 7133LA70JI 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 7133LA70JI meets industry standards.
7.What is the process for return or replacement of 7133LA70JI?
All 7133LA70JI units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA70JI, 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 7133LA70JI part is unused and in its original packaging.
Return procedure for 7133LA70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA70JI Tags
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AT24C02C-XHM-T
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