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Renesas 7130LA20J8
- Part No.:
- 7130LA20J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130LA20J8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,571
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Product details
Overview
7130LA20J8 from IDT (Integrated Device Technology) is a high-speed 1K × 8 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 interprocessor communication systems requiring concurrent access without external logic.
For engineers reviewing the 7130LA20J8 datasheet, 7130LA20J8 pinout, 7130LA20J8 application, or 7130LA20J8 equivalent, key selection criteria include bus contention resolution via BUSY flag timing (tBAA ≤ 20 ns), low standby current (ISB3 = 0.2 mA typ.), battery-backed data retention at 2V, and compatibility with IDT7140SLAVE devices for 16-bit expansion.
Technical Context
The 7130LA20J8 implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves port conflicts using BUSYL/BUSYR open-drain outputs (requiring external pull-ups) and supports interrupt signaling via INTL/INTR pins.
It operates in MASTER mode only, providing BUSY output (not input), automatic power-down via CE/CER control, and supports both CE-controlled and R/W-controlled write cycles with tWC = 20 ns, tWP = 15 ns, and tBDD ≤ 25 ns for port-to-port read-after-write synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact buffer or register-file implementation in space-constrained designs. |
| Access Time | 20 ns max read cycle (tRC), supporting 50 MHz sustained dual-port throughput without wait states in high-speed control loops. |
| Data Retention | 2.0 V minimum VCC for data retention (LA version only), allowing backup from coin-cell batteries during main power loss. |
| Standby Current | 0.2 mA typical full-standby current (ISB3) with CMOS-level inputs, critical for low-power embedded systems with intermittent activity. |
| Supply Voltage | 4.5–5.5 V DC (5.0 V ±10%), compatible with standard TTL logic families and legacy 5V system rails. |
| Operating Temp | –40°C to +85°C industrial range, validated for use in motor drives, industrial PLCs, and telecom line cards. |
| Arbitration Logic | On-chip priority arbitration with tAPS = 5 ns setup, eliminating need for external glue logic in dual-CPU shared-memory topologies. |
Pinout & Package
7130LA20J8 is packaged in a 48-pin ceramic flatpack (FP48) with 0.75" × 0.75" body size and side-brazed leads. Pin functions are electrically isolated per port, with dedicated left/right address, data, and control lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two separate ground pins ensure stable return paths for left/right port switching noise. |
| VCC (Pin 25) | Power supply | Single 5V supply powers both ports; all VCC pins must be decoupled locally. |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; simultaneous assertion allows concurrent access. |
| OEL / OER | Output enable (left/right) | Controls tri-state of I/O pins independently; high-Z when deasserted. |
| R/WL / R/WR | Read/write direction (left/right) | High = read, low = write; determines data flow direction per port. |
| BUSYL / BUSYR | Arbitration status (open-drain) | Low indicates port contention; requires external 4.7kΩ pull-up to VCC for proper logic level. |
| INTL / INTR | Interrupt flag (open-drain) | Signals inter-port event (e.g., write to address 0x3FE); also requires pull-up. |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit addressing per port; no internal multiplexing - full parallel access. |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional data (left/right) | 8-bit data bus per port; driven only when OE active and R/W = H (read) or L (write). |
Key Features
| Feature | Design Value |
|---|---|
| MASTER-only arbitration | Enables plug-in replacement of discrete arbitration logic in dual-processor systems, reducing BOM count and layout complexity. |
| 2V data retention | Preserves memory contents during brown-out or battery-switchover events without external supervision circuitry. |
| Open-drain BUSY/INT | Allows wired-OR connection of multiple 7130LA devices for scalable multi-port memory systems. |
| Asynchronous dual-port operation | Eliminates clock domain crossing issues between independent processors or peripherals sharing memory. |
| TTL-compatible interface | Direct interfacing with legacy microcontrollers, FPGAs, and ASICs without level-shifting components. |
Applications
| Real-Time Interprocessor Communication | Digital Signal Processing Buffer |
|---|---|
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands via shared memory in an autonomous vehicle ECU. IC Role / Device Role / Timing Role: 7130LA20J8 acts as MASTER dual-port SRAM, resolving bus contention via BUSY flags and enabling lock-free data exchange at 50 MHz. Use Value: Eliminates software semaphores and reduces inter-CPU latency to ≤25 ns (tBDD), improving closed-loop response time by >3× vs. UART-based handshaking. | Use Scenario: An FPGA-accelerated audio codec buffers PCM samples between ADC capture and DSP processing stages. IC Role / Device Role / Timing Role: 7130LA20J8 provides independent left/right ports for simultaneous sample ingestion and coefficient update without pipeline stalls. Use Value: Sustains 20 ns read/write cycles across both ports, enabling real-time 192 kHz stereo processing with zero sample drop. |
| Industrial Motion Controller | Redundant Safety PLC Memory |
Use Scenario: A servo drive controller uses dual CPUs - one for trajectory planning, one for current-loop execution - sharing position setpoints and feedback. IC Role / Device Role / Timing Role: 7130LA20J8 serves as deterministic shared memory with hardware arbitration, ensuring atomic updates to motion parameters. Use Value: Guarantees tAPS = 5 ns arbitration setup prevents race conditions, meeting SIL-2 functional safety timing requirements. | Use Scenario: Dual-channel safety PLC maintains mirrored state variables; one channel writes while the other validates consistency. IC Role / Device Role / Timing Role: 7130LA20J8 stores critical safety flags with 2V data retention, surviving main power failure for ≥72 hours on backup battery. Use Value: Meets IEC 61508-2 Annex F data retention requirements without external NVSRAM or EEPROM overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-25JC | 25 ns access, 5V-only, no data retention below 4.5V; 28-pin SOIC package. | Lacks 2V retention and on-chip arbitration - requires external BUSY logic for multi-processor use. | Select only for cost-sensitive, single-CPU buffer applications where 20 ns speed and battery backup are unnecessary. |
| IDT7140LA20J8 | SLAVE-only variant; BUSY pins are inputs (not outputs); no arbitration logic; identical timing and retention. | Must be paired with 7130LA20J8 in MASTER/SLAVE configuration for 16-bit expansion; cannot operate standalone as memory. | Use exclusively as companion SLAVE to 7130LA20J8 in 16-bit word-width systems - not a functional substitute. |
Compared with CY7C136-25JC and IDT7140LA20J8, the 7130LA20J8 uniquely combines 20 ns speed, on-chip arbitration, and 2V data retention in a single MASTER device - making it irreplaceable in battery-backed, real-time dual-CPU architectures requiring deterministic contention resolution.
Availability
7130LA20J8 is available at Aetrix Electronics and suitable for industrial motion controllers, redundant safety PLCs, real-time interprocessor communication systems, and digital signal processing buffers requiring stable component supply across extended product lifecycles.
Supply support for 7130LA20J8 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 since 2019.
The IDT7130/7140 family was designed specifically for deterministic, low-latency shared-memory interconnects in dual-processor, DSP, and industrial control systems - prioritizing arbitration integrity and data retention over density or cost.
FAQ
What is the maximum operating temperature range for the 7130LA20J8?
7130LA20J8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all electrical specifications including tRC = 20 ns, ISB3 = 0.2 mA, and VDR = 2.0 V, making it suitable for under-hood automotive modules and factory-floor automation equipment where ambient heat exceeds commercial-grade limits.
Does the 7130LA20J8 support true simultaneous read/write operations on both ports?
Yes, the 7130LA20J8 supports fully asynchronous concurrent access: one port can read while the other writes to different addresses. When both ports access the same address, on-chip arbitration asserts BUSYL or BUSYR within 20 ns (tBAA) to block the later-arriving write, ensuring data coherency without external intervention - a core function of its MASTER role.
How does the 2V data retention feature work in the 7130LA20J8?
The 7130LA20J8 retains stored data when VCC drops to 2.0 V (minimum), drawing only 100 µA typical ICCDR current. This is achieved via optimized CMOS cell design and low-leakage fabrication - verified per Table 7 in the datasheet. No external circuitry is needed; simply connect a 2V backup source to VCC during main power loss.
Can the 7130LA20J8 be used without external pull-up resistors on BUSY and INT pins?
No - BUSYL, BUSYR, INTL, and INTR are open-drain outputs requiring external pull-up resistors (typically 4.7 kΩ to VCC). Without pull-ups, these signals remain floating, causing undefined arbitration behavior and missed interrupts. This requirement is explicitly stated in Note 1 of the Functional Block Diagram and confirmed in Pin Configuration notes.
Is the 7130LA20J8 pin-compatible with any IDT7140 variants?
No - 7130LA20J8 is MASTER-only with BUSY outputs and arbitration logic; IDT7140 variants are SLAVE-only with BUSY inputs and no arbitration. Though they share identical pinouts in FP48 packages (same pin count and signal names), their BUSY/INT pin functionality is inverted and mutually exclusive. Using them interchangeably will cause system failure.
7130LA20J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-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:
- 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)
7130LA20J8 FAQ
1.How can I place an order for 7130LA20J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA20J8 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 7130LA20J8 reliable?
The price and inventory of 7130LA20J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA20J8 is usually 5 days.
3.What payment methods are accepted for 7130LA20J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA20J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA20J8?
7130LA20J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA20J8 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 7130LA20J8?
For technical support, including 7130LA20J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA20J8 requirements.
6.How does Aetrix verify that 7130LA20J8 is sourced from the original manufacturer or authorized distributors?
All 7130LA20J8 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 7130LA20J8 meets industry standards.
7.What is the process for return or replacement of 7130LA20J8?
All 7130LA20J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA20J8, 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 7130LA20J8 part is unused and in its original packaging.
Return procedure for 7130LA20J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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