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Renesas 7130LA100J8
- Part No.:
- 7130LA100J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130LA100J8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
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Product details
Overview
7130LA100J8 from IDT (Integrated Device Technology) is a high-speed 1K × 8 dual-port static RAM with master arbitration logic, 100ns maximum read/write cycle time, 1μA full-standby current (CMOS-level CE), and battery-backed data retention down to 2V - used in real-time interprocessor communication systems requiring concurrent access without external arbitration logic.
For engineers reviewing the 7130LA100J8 datasheet, 7130LA100J8 pinout, 7130LA100J8 application, or 7130LA100J8 equivalent, key selection criteria include dual-port contention resolution timing (tBDD ≤ 65ns), open-drain BUSY output requirements (pull-up resistor needed), INT flag port-to-port signaling latency (tINS ≤ 60ns), and compatibility with 5V ±10% TTL-level bus interfaces in industrial temperature environments.
Technical Context
The 7130LA100J8 implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves simultaneous access to the same memory location via BUSY flag assertion, with tAPS = 5ns priority setup time and tBDD ≤ 65ns disable-to-valid-data delay for port-to-port write-read coordination.
It supports battery backup mode (VDR = 2.0V) with ICCDR ≤ 4000µA at military/industrial temperatures, and features open-drain BUSYL/BUSYR outputs requiring external pull-ups - unlike the IDT7140 slave which accepts BUSY as input. The device operates across –40°C to +85°C with 5V ±10% supply and meets MIL-PRF-38535 QML for qualified military-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact dual-access buffer storage without external data-width expansion. |
| Max Read Cycle Time | 100ns - defines minimum interval between successive reads on either port; critical for real-time deterministic response in control loops. |
| Full Standby Current | 1.0µA (typ.) / 10µA (max.) at CMOS-level CE - enables ultra-low-power hold mode during system sleep with battery backup. |
| Data Retention Voltage | 2.0V minimum - allows retention during main power loss using coin-cell or supercapacitor backup without volatile data loss. |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded applications including motor drives and programmable logic controllers. |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V TTL bus systems; no level-shifting required for legacy controller interfacing. |
| Arbitration Priority Setup | tAPS = 5ns - ensures deterministic BUSY assertion when both ports access same address within tight timing window. |
Pinout & Package
7130LA100J8 is packaged in a 48-pin ceramic flatpack (FP48) with 0.75" × 0.75" footprint and 0.11" height, rated for industrial/military operation and featuring hermetic sealing for moisture resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A9L | Left port address inputs | 10-bit address bus for left-side memory access; must be stable before CE/WE assertion per tAS = 0ns requirement. |
| A0R–A9R | Right port address inputs | Independent 10-bit address bus enabling concurrent access to same or different locations from opposite port. |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit TTL-compatible I/O; direction controlled by R/WL and OEL; high-impedance when OEL = VIH. |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated 8-bit data path; no contention risk unless same address accessed simultaneously. |
| CEL, CER | Chip enable (active low) | Port-selective enable; asserting CEL only activates left port while right remains in standby (ISB2 mode). |
| R/WL, R/WR | Read/write control | Active-high write enable; low = read, high = write - matches standard microprocessor bus polarity. |
| OEL, OER | Output enable (active low) | Controls I/O driver state; when high, data pins enter high-Z - essential for bus sharing. |
| BUSYL, BUSYR | Open-drain busy flags | Outputs (7130 only); require external pull-up; indicate write contention on respective port - blocks R/W until deasserted. |
| INTL, INTR | Interrupt request outputs | Active-low flags signaling port-to-port events (e.g., interrupt set/reset via A9–A0 = 3FF/3FE); edge-triggered. |
| VCC, GND | Power supply | All VCC pins must be connected to 5V ±10%; all GND pins tied to common ground - decoupling required per pin. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates need for external priority encoder or glue logic in dual-CPU systems - reduces BOM count and PCB area. |
| Battery backup data retention | Preserves memory contents at 2V supply - enables seamless failover in power-interrupted industrial HMI or telemetry nodes. |
| Master-only BUSY output architecture | Distinguishes 7130LA from SLAVE 7140; enables standalone dual-port use or MASTER/SLAVE expansion to 16+ bit word width. |
| Industrial temperature qualification | Validated across –40°C to +85°C with full AC/DC specs - suitable for under-hood automotive ECUs or factory-floor PLCs. |
| TTL-compatible 5V interface | Direct connection to legacy microcontrollers (e.g., 8051, Z80) and FPGAs without level translators or bus buffers. |
Applications
| Real-Time Interprocessor Communication | Dual-CPU Data Exchange Buffer |
|---|---|
Use Scenario: Two independent microprocessors share sensor fusion results and actuator commands in a motion control system with strict <100ns interlock timing. IC Role / Device Role / Timing Role: 7130LA100J8 acts as shared memory hub with hardware arbitration - resolving simultaneous writes to same address via BUSY flag within 65ns. Use Value: Eliminates software semaphores and polling delays, guaranteeing deterministic <100ns memory access for closed-loop servo updates. | Use Scenario: A host CPU offloads real-time signal processing to a dedicated DSP, requiring zero-wait-state data handoff for FFT buffers. IC Role / Device Role / Timing Role: 7130LA100J8 provides independent left/right ports - host writes to left port while DSP reads from right port asynchronously. Use Value: Enables continuous streaming without pipeline stalls; 100ns cycle time sustains >10MB/s throughput across both ports. |
| Industrial PLC Memory Module | Battery-Backed Configuration Storage |
Use Scenario: Programmable logic controller retains I/O mapping and ladder logic state during AC power loss in factory automation. IC Role / Device Role / Timing Role: 7130LA100J8 serves as nonvolatile configuration store - switching to 2V battery backup mode when main 5V rail drops. Use Value: Guarantees 100% data integrity during brownouts; 1μA standby current extends coin-cell life beyond 5 years. | Use Scenario: Medical diagnostic equipment stores calibration coefficients and user preferences across power cycles with tamper-proof retention. IC Role / Device Role / Timing Role: 7130LA100J8 operates in data retention mode at 2V - maintaining SRAM state without refresh or EEPROM wear-out. Use Value: Avoids EEPROM write endurance limits (100k cycles) and slow write times (>5ms); enables unlimited rapid reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131-100AXC | 1K × 8, 100ns, but no on-chip arbitration logic; BUSY must be implemented externally. | Requires additional logic for contention resolution - increases layout complexity and propagation delay. | Select when cost sensitivity outweighs arbitration integration; verify external BUSY timing meets system tBDD budget. |
| IDT7140LA100J8 | Same speed/package, but SLAVE-only: BUSY pins are inputs (not outputs); no arbitration logic. | Must be paired with 7130LA as MASTER; cannot operate standalone in dual-port mode. | Choose only for 16-bit+ memory expansion where 7130LA handles arbitration and 7140LA provides extra width. |
Compared with CY7C131-100AXC and IDT7140LA100J8, the 7130LA100J8 uniquely integrates arbitration and operates autonomously - reducing design effort for single-chip dual-CPU interfaces while supporting battery retention unavailable in Cypress' offering.
Availability
7130LA100J8 is available at Aetrix Electronics and suitable for industrial automation, real-time control systems, and battery-backed data logging requiring stable component supply across extended product lifecycles.
Supply support for 7130LA100J8 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.
The IDT7130/7140 family was designed for deterministic dual-processor memory sharing in avionics, industrial control, and telecom infrastructure - prioritizing hardware arbitration, low-power retention, and military-grade reliability.
FAQ
What is the guaranteed data retention voltage for the 7130LA100J8?
The 7130LA100J8 guarantees data retention down to 2.0V (VDR), as specified in Table 7 of the datasheet. This enables reliable operation during brownout conditions using a backup battery or supercapacitor. At VCC = 2.0V and TA = +25°C, ICCDR is characterized up to 4000µA for military/industrial grades - confirming functional retention without data loss in the 7130LA100J8.
Does the 7130LA100J8 support true simultaneous read/write operations on both ports?
Yes, the 7130LA100J8 supports fully asynchronous dual-port operation: reads and writes may occur concurrently on left and right ports. However, if both ports access the same memory address, on-chip arbitration asserts BUSYL or BUSYR to block the later-arriving write until completion - ensuring data coherency. This behavior is intrinsic to the 7130LA100J8's master arbitration logic and requires no external circuitry.
What package type is used for the 7130LA100J8, and what are its mechanical dimensions?
The 7130LA100J8 uses a 48-pin ceramic flatpack (FP48) package, with body dimensions of approximately 0.75 inch × 0.75 inch × 0.11 inch. This hermetically sealed package meets MIL-PRF-38535 QML requirements and is rated for industrial and military temperature ranges - distinguishing it from plastic DIP or LCC variants of the same family.
How does the BUSY arbitration mechanism work in the 7130LA100J8?
In the 7130LA100J8, BUSY arbitration resolves contention when both ports access the same address: the port with earlier address/enable stability wins, and the delayed port's BUSY output goes low (open-drain), inhibiting its write. tAPS = 5ns ensures priority setup, and tBDD ≤ 65ns defines the delay from BUSY deassertion to valid read data - all implemented in hardware without firmware intervention in the 7130LA100J8.
Can the 7130LA100J8 be used as a standalone dual-port RAM without pairing with an IDT7140?
Yes, the 7130LA100J8 is designed as a self-contained master dual-port SRAM and operates fully standalone - unlike the IDT7140 which functions only as a SLAVE. Its integrated arbitration logic, BUSY outputs, and INT flag generation enable complete dual-CPU communication without auxiliary devices, making the 7130LA100J8 ideal for compact, single-chip interprocessor interfaces.
7130LA100J8 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:
- 100ns
- Access Time:
- 100 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)
7130LA100J8 FAQ
1.How can I place an order for 7130LA100J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA100J8 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 7130LA100J8 reliable?
The price and inventory of 7130LA100J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA100J8 is usually 5 days.
3.What payment methods are accepted for 7130LA100J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA100J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA100J8?
7130LA100J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA100J8 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 7130LA100J8?
For technical support, including 7130LA100J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA100J8 requirements.
6.How does Aetrix verify that 7130LA100J8 is sourced from the original manufacturer or authorized distributors?
All 7130LA100J8 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 7130LA100J8 meets industry standards.
7.What is the process for return or replacement of 7130LA100J8?
All 7130LA100J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA100J8, 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 7130LA100J8 part is unused and in its original packaging.
Return procedure for 7130LA100J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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