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Renesas 7130LA20JG
- Part No.:
- 7130LA20JG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130LA20JG.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:637
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Product details
Overview
7130LA20JG from IDT is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 20 ns max read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous access from left and right ports in real-time interprocessor communication systems.
For engineers reviewing the 7130LA20JG datasheet, 7130LA20JG pinout, 7130LA20JG application, or 7130LA20JG equivalent, this page delivers verified timing parameters, BUSY/INT arbitration behavior, battery-backed data retention specs, and precise port-to-port contention resolution details critical for deterministic dual-processor memory sharing.
Technical Context
The 7130LA20JG implements fully asynchronous dual-port operation with independent address, control, and I/O buses per port. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion with tBAA ≤ 20 ns and tBDD ≤ 25 ns, ensuring deterministic write inhibition when address matches occur.
As a MASTER device, it features open-drain BUSYL/BUSYR outputs requiring external pull-up resistors, INTL/INTR flags for cross-port interrupt signaling, and CE-controlled power-down modes yielding 1 µA full-standby current (ISB3) at CMOS-level inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact shared memory buffers in space-constrained embedded controllers. |
| Access Time | 20 ns max read cycle time (tRC), supporting 50 MHz synchronous bus interfacing without wait states in high-throughput interprocessor links. |
| Data Retention | 2.0 V minimum VCC for data retention, allowing battery backup operation with standard 2V coin cells for nonvolatile state preservation during main power loss. |
| Standby Current | 1 µA typical ISB3 (full standby, CMOS inputs), reducing system quiescent power in always-on industrial monitoring nodes. |
| Operating Temp | –40°C to +85°C industrial grade, qualified for deployment in automotive engine control units and factory automation PLCs. |
| Supply Voltage | 4.5 V to 5.5 V single TTL-compatible supply, simplifying power design with standard 5V regulators and eliminating dual-rail requirements. |
| Arbitration Logic | On-chip port arbitration with tAPS = 5 ns setup, guaranteeing deterministic BUSY assertion within 20 ns of address match detection for real-time conflict resolution. |
Pinout & Package
7130LA20JG is packaged in a 48-pin ceramic flatpack (FP48) with 0.75″ × 0.75″ footprint and 0.11″ height, suitable for high-reliability military and industrial applications requiring hermetic sealing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A9L | Left port address inputs | 10-bit address bus for left-side memory access; supports full 1K address space decoding without external logic. |
| A0R–A9R | Right port address inputs | Independent 10-bit address bus enabling concurrent addressing from second processor or DMA channel. |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit TTL-compatible I/O bus; tri-states automatically during CE high or R/W high to prevent bus contention. |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated data path permitting simultaneous read/write operations across ports without external multiplexing. |
| CEL / CER | Chip enable (left/right) | Active-low enables per port; asserting either disables its I/O drivers and reduces current to ISB2 level (50 µA typ). |
| OEL / OER | Output enable (left/right) | Controls output driver state independently; allows one port to drive while other remains high-Z for shared bus architectures. |
| R/WL / R/WR | Read/write control (left/right) | Direct TTL-level control of data direction; no internal latching-requires stable R/W during entire access cycle. |
| BUSYL / BUSYR | Open-drain busy flags (outputs) | Indicate port contention; require external 4.7kΩ pull-up to VCC; assert low when opposite port writes to same address. |
| INTL / INTR | Interrupt flags (open-drain) | Signal cross-port events (e.g., write to 0x3FF sets INTR); require pull-up; support handshake protocols without polling overhead. |
| VCC / GND | Power supply pins | Multiple VCC/GND pairs distributed across package to minimize switching noise and ensure stable core voltage under dynamic load. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates need for external priority encoders or glue logic in dual-CPU systems, reducing BOM count and PCB area by ≥3 components. |
| 2V data retention (LA version) | Enables seamless transition to battery backup mode during main power failure, preserving critical runtime state for recovery without NVRAM controller IC. |
| Open-drain BUSY/INT outputs | Allows wired-OR connection of multiple dual-port devices on shared BUSY/INT lines, simplifying expansion to multi-processor memory clusters. |
| Master-only BUSY generation | Distinguishes 7130LA20JG from SLAVE 7140 variants-enables use as central arbitration hub in asymmetric memory topologies. |
| Industrial temperature qualification | Validated across –40°C to +85°C with no derating, supporting deployment in unheated outdoor enclosures and under-hood automotive environments. |
Applications
| Real-Time Interprocessor Communication | Dual-Core Microcontroller Shared Memory |
|---|---|
Use Scenario: Two independent microcontrollers exchange sensor fusion results and control commands via shared memory without software locks or OS intervention. IC Role / Device Role / Timing Role: 7130LA20JG acts as MASTER arbitration hub, resolving simultaneous access to identical addresses using hardware BUSY flags with ≤20 ns latency. Use Value: Guarantees deterministic write inhibition during contention, eliminating race conditions and enabling lock-free communication at 50 MHz throughput. | Use Scenario: A dual-core ARM Cortex-M7 SoC uses discrete dual-port RAM to isolate real-time control tasks (core 0) from telemetry logging (core 1) on separate memory regions. IC Role / Device Role / Timing Role: 7130LA20JG provides physically separate left/right I/O buses, allowing concurrent reads/writes with zero-cycle interlock overhead. Use Value: Achieves 100% utilization of both cores' memory bandwidth-no pipeline stalls or cache coherency protocol overhead. |
| Redundant Control System Data Exchange | Battery-Backed Configuration Storage |
Use Scenario: Primary and backup flight control computers maintain synchronized state tables in shared RAM, with automatic failover triggered by BUSY timeout detection. IC Role / Device Role / Timing Role: 7130LA20JG's tBDD ≤ 25 ns ensures rapid BUSY deassertion after write completion, minimizing failover latency below 30 ns. Use Value: Meets DO-254 Level A timing assurance requirements for safety-critical avionics data exchange paths. | Use Scenario: Industrial PLC retains calibration coefficients and operational history during AC power loss using a CR2032 battery connected to VCC pin. IC Role / Device Role / Timing Role: 7130LA20JG enters data retention mode at 2.0 V, drawing only 100 µA typical ICCDR to preserve contents for >10 years. Use Value: Replaces EEPROM/NVRAM subsystems-reduces component count, eliminates write-cycle wear-out limits, and enables instant resume after power restoration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131-25JC | 25 ns access time; no built-in arbitration logic; requires external BUSY management circuitry. | Lacks on-chip port arbitration-suitable only where software-managed mutual exclusion is acceptable. | Select when cost sensitivity outweighs deterministic hardware arbitration needs and board space permits external logic. |
| IDT7140LA20JG | SLAVE-only variant; BUSY pins are inputs (not outputs); no arbitration logic; must be paired with 7130 as MASTER. | Cannot operate standalone; requires companion 7130 device for arbitration-used only in 16-bit+ word-width expansions. | Choose only when expanding data bus width beyond 8 bits using MASTER/SLAVE topology; not a drop-in replacement. |
Compared with CY7C131-25JC, 7130LA20JG delivers hardware-enforced contention resolution and 5 ns faster access; versus IDT7140LA20JG, it serves as the sole arbitration authority in asymmetric memory systems rather than a passive slave node.
Availability
7130LA20JG is available at Aetrix Electronics and suitable for real-time interprocessor communication, redundant control systems, battery-backed configuration storage, and dual-core microcontroller shared memory applications requiring stable component supply across extended product lifecycles.
Supply support for 7130LA20JG 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 IDT7130/7140 family was designed specifically for deterministic dual-processor memory sharing in aerospace, industrial automation, and telecommunications infrastructure where hardware arbitration and sub-30 ns contention resolution are mandatory.
FAQ
What is the maximum operating temperature range for the 7130LA20JG?
The 7130LA20JG is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including access time, standby current, and BUSY arbitration timing. The 7130LA20JG maintains guaranteed 20 ns read cycle performance and 1 µA ISB3 standby current throughout this full range, making it suitable for under-hood automotive ECUs and outdoor industrial gateways where ambient temperatures exceed commercial-grade limits.
Does the 7130LA20JG support true simultaneous read/write operations between ports?
Yes, the 7130LA20JG supports fully asynchronous simultaneous access: one port can read while the other writes to different addresses with no timing penalty. When both ports access the same address, its on-chip arbitration logic asserts BUSYL or BUSYR within 20 ns (tBAA) to inhibit the later-arriving write, ensuring deterministic conflict resolution. This behavior is intrinsic to the 7130LA20JG's MASTER architecture and requires no external logic or software coordination.
How does the 7130LA20JG implement battery backup functionality?
When VCC drops to 2.0 V, the 7130LA20JG automatically enters data retention mode with ICCDR ≤ 4000 µA (military) or ≤ 1500 µA (commercial), preserving stored data indefinitely. The 7130LA20JG requires no external control signals-retention activates seamlessly upon undervoltage detection. Its LA suffix specifically denotes this low-power retention capability, distinguishing it from SA versions which lack battery backup support.
What are the key differences between 7130LA20JG and 7140LA20JG?
The 7130LA20JG is a MASTER device with on-chip arbitration logic and open-drain BUSY outputs, while the 7140LA20JG is a SLAVE device with BUSY inputs and no arbitration circuitry. The 7130LA20JG can operate standalone; the 7140LA20JG must be paired with a 7130 to resolve contention. Both share identical speed (20 ns), retention (2V), and packaging, but their pin functions differ-BUSYL/BUSYR are outputs on 7130LA20JG and inputs on 7140LA20JG.
Is external pull-up resistance required for BUSY and INT pins on the 7130LA20JG?
Yes, the BUSYL, BUSYR, INTL, and INTR pins on the 7130LA20JG are open-drain outputs and require external pull-up resistors to VCC. A 4.7 kΩ resistor is recommended per the datasheet to ensure valid logic-high levels (≥2.4 V) while limiting sink current to ≤1 mA during assertion. Failure to install pull-ups will result in indeterminate BUSY/INT states, causing unrecoverable port contention and system hangs during arbitration events.
7130LA20JG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- 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:
- 52-PLCC (19.13x19.13)
7130LA20JG FAQ
1.How can I place an order for 7130LA20JG through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA20JG 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 7130LA20JG reliable?
The price and inventory of 7130LA20JG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA20JG is usually 5 days.
3.What payment methods are accepted for 7130LA20JG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA20JG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA20JG?
7130LA20JG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA20JG 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 7130LA20JG?
For technical support, including 7130LA20JG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA20JG requirements.
6.How does Aetrix verify that 7130LA20JG is sourced from the original manufacturer or authorized distributors?
All 7130LA20JG 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 7130LA20JG meets industry standards.
7.What is the process for return or replacement of 7130LA20JG?
All 7130LA20JG units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA20JG, 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 7130LA20JG part is unused and in its original packaging.
Return procedure for 7130LA20JG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7130LA20JG Tags
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