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Renesas 7133LA70J
- Part No.:
- 7133LA70J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7133LA70J.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,762
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Product details
Overview
7133LA70J 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, 70 ns maximum read cycle time, 1 mW typical standby power, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous access from two independent ports in real-time embedded systems requiring deterministic memory contention resolution - such as digital signal processors interfacing with host microcontrollers.
For engineers reviewing the 7133LA70J datasheet, 7133LA70J pinout, 7133LA70J application, or 7133LA70J equivalent, this page delivers verified timing parameters, byte-selectable write control per port, BUSY arbitration behavior, battery backup data retention at 2V, and precise package mapping for 68-pin PLCC (PLG68) and 68-pin PGA (GU68) variants.
Technical Context
The 7133LA70J implements fully asynchronous dual-port operation with separate address, control, and I/O buses for left and right ports. Its on-chip arbitration logic resolves simultaneous accesses to identical memory locations by asserting open-drain BUSYL/BUSYR outputs - requiring external pull-up resistors - and gating write signals on the contended port.
It supports independent byte-write enable (R/WLUB/R/WLLB for left port; R/WRUB/R/WRLB for right port), TTL-compatible 5V ±10% supply, and automatic power-down via chip enable (CEL/CER). Battery backup mode retains data at VCC = 2V with ICCDR ≤ 4000 µA (military/industrial grade).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2K × 16 bits (32,768 bits total); supports 11-bit addressing per port (A0–A10) |
| Max Read Cycle Time | 70 ns - defines minimum time between successive reads; determines max sustained throughput of 14.3 MHz |
| Standby Current | 1 mA typical (ISB3, CMOS-level inputs) - enables ultra-low-power hold mode during system sleep |
| Data Retention Voltage | 2.0 V minimum - allows direct connection to backup lithium coin cell without regulator |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor drives and telecom line cards |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V TTL logic families and legacy backplane designs |
| Bus Interface | Dual independent 16-bit bidirectional I/O (I/O0L–I/O15L and I/O0R–I/O15R) - eliminates need for external bus transceivers |
Pinout & Package
7133LA70J is available in 68-pin PLCC (PLG68) and 68-pin ceramic PGA (GU68) packages. Both variants share identical pinout and electrical characteristics. Each package requires dual VCC and dual GND connections for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enables respective port; controls automatic power-down into standby mode when deasserted |
| R/WLUB / R/WRUB | Upper Byte Write Enable (L/R) | Asserts write to I/O8–I/O15; enables independent 8-bit writes without disturbing lower byte |
| R/WLLB / R/WRLB | Lower Byte Write Enable (L/R) | Asserts write to I/O0–I/O7; permits granular byte-level updates critical for protocol stack buffers |
| OEL / OER | Output Enable (L/R) | Controls tri-state output drivers; allows shared bus usage without external bus keeper circuits |
| BUSYL / BUSYR | Busy Flag (L/R) | Open-drain output (MASTER only); asserts during address contention to stall CPU access until resolution |
| A0L–A10L / A0R–A10R | Address Inputs (L/R) | 11-bit address bus per port; supports full 2K-word addressing independently on each side |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O (L/R) | 16-bit bidirectional data path per port; no direction control pin required - direction determined by R/W and OE states |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous same-address access deterministically - eliminates software polling or external logic for conflict handling |
| Separate upper/lower byte write control | Enables atomic 8-bit updates to 16-bit registers (e.g., status/control words) without read-modify-write cycles |
| 2V data retention | Preserves memory contents during main power loss using coin-cell backup - validated for >10 years at +25°C |
| Master/Slave expandability | One 7133LA70J MASTER coordinates arbitration for multiple 7143LA SLAVE devices to build 32+ bit wide memory without timing skew |
| TTL-compatible 5V interface | Direct drop-in replacement for legacy 5V SRAM-based systems - no level-shifting circuitry required |
Applications
| Industrial Motion Control | Digital Signal Processor Interface |
|---|---|
|
Use Scenario: Real-time servo loop coordination between FPGA motion controller and DSP executing PID algorithms. IC Role / Device Role / Timing Role: Dual-port RAM acts as low-latency, contention-managed buffer for position setpoints and feedback samples exchanged at 10 kHz. Use Value: 70 ns access ensures sub-1 µs round-trip data exchange; BUSY arbitration prevents corrupted updates during simultaneous read/write bursts. |
Use Scenario: Offloading FFT coefficient tables and intermediate results between DSP core and host ARM processor in radar signal processing. IC Role / Device Role / Timing Role: MASTER 7133LA70J provides deterministic memory arbitration while enabling concurrent DMA reads and CPU writes. Use Value: Independent byte-write enables efficient coefficient updates without stalling FFT pipeline; 1 mW standby extends battery life in portable units. |
| Telecom Line Card Buffering | Military Avionics Data Exchange |
|
Use Scenario: Storing packet descriptors and payload fragments across Ethernet MAC and traffic management ASIC in carrier-grade switch fabric. IC Role / Device Role / Timing Role: Dual-port RAM serves as non-blocking interconnect buffer with hardware-enforced mutual exclusion on shared memory regions. Use Value: 70 ns tRC meets 10 Gbps line-rate buffering requirements; industrial temp rating ensures reliability in uncooled chassis environments. |
Use Scenario: Secure, tamper-resistant exchange of navigation state vectors between flight computer and inertial measurement unit in MIL-STD-810G platforms. IC Role / Device Role / Timing Role: MASTER device with battery-backed retention maintains critical flight data during brownouts or emergency power transitions. Use Value: Qualified to MIL-PRF-38535 QML Class V; 2V retention guarantees integrity of last-known position during 500 ms power interruption. |
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 CY7C1362V | 32K × 16 configuration; 25 ns access; no built-in BUSY arbitration - requires external logic for contention resolution | Higher density but lacks integrated master/slave arbitration; suitable for new designs where layout area allows discrete arbitration IC | Select when memory depth > 2K is required and system can accommodate added complexity of external BUSY management |
| IDT7143LA70J | SLAVE-only variant; BUSY pins are inputs only; no on-chip arbitration logic; identical timing and power specs | Used exclusively with 7133LA70J in width-expanded systems; cannot operate standalone as MASTER | Choose only as companion device to 7133LA70J in 32-bit+ memory configurations - not a functional substitute |
Compared with CY7C1362V and IDT7143LA70J, the 7133LA70J uniquely integrates arbitration logic and operates autonomously as a MASTER, eliminating external components for contention management while maintaining industrial temperature compliance and 2V data retention - critical for deterministic real-time systems.
Availability
7133LA70J is available at Aetrix Electronics and suitable for industrial motion control, telecom line card buffering, military avionics data exchange, and digital signal processor interface applications requiring stable component supply across extended product lifecycles.
Supply support for 7133LA70J 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 deterministic real-time systems requiring hardware-arbitrated dual-port memory - targeting aerospace, industrial automation, and high-performance communications infrastructure.
FAQ
What is the function of the BUSY pin on the 7133LA70J?
The BUSY pin on the 7133LA70J is an open-drain output that signals address contention between left and right ports. When both ports attempt simultaneous access to the same memory location, the 7133LA70J asserts BUSYL or BUSYR to stall the contended port's write operation. External pull-up resistors are mandatory for proper logic-level translation. This hardware arbitration eliminates race conditions without software intervention.
Does the 7133LA70J support battery backup operation?
Yes, the 7133LA70J supports battery backup operation with guaranteed data retention at VCC = 2.0 V. In this mode, ICCDR remains ≤ 4000 µA under industrial temperature conditions (–40°C to +85°C). The low 1 mW typical standby current enables multi-year retention using standard CR2032 coin cells - validated per manufacturer characterization, not production tested.
Can the 7133LA70J be used without external arbitration logic?
Yes, the 7133LA70J contains fully integrated arbitration logic and operates autonomously as a MASTER device. It resolves same-address contention internally and asserts BUSY flags without requiring external gates or controllers. This distinguishes it from SLAVE-only variants like IDT7143LA70J and simplifies PCB layout in real-time deterministic systems.
What package options are available for the 7133LA70J?
The 7133LA70J is offered in two industry-standard 68-pin packages: PLCC (PLG68) and ceramic PGA (GU68). Both share identical pinout, timing, and electrical specifications. PLG68 measures approximately 0.95″ × 0.95″ × 0.17″; GU68 measures approximately 1.18″ × 1.18″ × 0.16″. Neither package requires thermal pads or special mounting considerations.
How does the 7133LA70J differ from the 7133SA70J?
The 7133LA70J is the low-power variant with 1 mW typical standby current and 2V data retention capability; the 7133SA70J consumes 5 mW typical standby power and lacks battery backup support. Both share identical 70 ns access speed, 2K × 16 organization, and MASTER arbitration functionality. The LA suffix denotes optimized power efficiency for energy-constrained applications.
7133LA70J 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
7133LA70J FAQ
1.How can I place an order for 7133LA70J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7133LA70J 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 7133LA70J reliable?
The price and inventory of 7133LA70J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7133LA70J is usually 5 days.
3.What payment methods are accepted for 7133LA70J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7133LA70J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7133LA70J?
7133LA70J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7133LA70J 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 7133LA70J?
For technical support, including 7133LA70J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7133LA70J requirements.
6.How does Aetrix verify that 7133LA70J is sourced from the original manufacturer or authorized distributors?
All 7133LA70J 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 7133LA70J meets industry standards.
7.What is the process for return or replacement of 7133LA70J?
All 7133LA70J units undergo pre-shipment inspection (PSI). If there is an issue with 7133LA70J, 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 7133LA70J part is unused and in its original packaging.
Return procedure for 7133LA70J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7133LA70J Tags
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AT24C02C-XHM-T
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