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Renesas 7130LA55J8
- Part No.:
- 7130LA55J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130LA55J8.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,955
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Product details
Overview
7130LA55J8 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, 55 ns maximum read/write cycle time, 2 V data retention capability, and industrial temperature range (–40°C to +85°C). It enables error-free 16-bit-or-wider memory expansion when paired with IDT7140 SLAVE devices in real-time embedded control systems.
For engineers reviewing the 7130LA55J8 datasheet, 7130LA55J8 pinout, 7130LA55J8 application, or 7130LA55J8 equivalent, this page delivers verified timing parameters, port arbitration behavior, battery backup operation details, and exact package mapping for FP48 ceramic flatpack - critical for deterministic dual-processor communication and legacy military-industrial memory upgrades.
Technical Context
The 7130LA55J8 implements fully asynchronous dual-port access with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves contention via BUSY flag assertion with tBDD ≤ 55 ns, and supports INTL/INTR interrupt signaling for inter-port coordination without external logic.
It features open-drain BUSYL/BUSYR outputs requiring external pull-up resistors, TTL-compatible 5V ±10% supply operation, and CMOS-level standby control enabling ISB3 ≤ 10 µA full standby current. Data retention at 2 V is exclusive to LA-grade variants and validated per MIL-PRF-38535 QML requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), providing dedicated dual-access storage for real-time co-processor or DMA-based architectures. |
| Access Time | 55 ns max (tAA, tACE, tAOE), ensuring compatibility with 18 MHz bus clocks in deterministic control loops. |
| Data Retention | 2.0 V minimum VCC, enabling battery-backed operation during main power loss in avionics and industrial PLCs. |
| Operating Temp | –40°C to +85°C (industrial grade), qualified per MIL-PRF-38535 QML for mission-critical environments. |
| Supply Voltage | 4.5 V to 5.5 V DC, TTL-compatible with legacy 5V system rails and noise margins ≥ 0.4 V. |
| Standby Current | ISB3 ≤ 10 µA (CMOS-level CE high), reducing quiescent power in always-on monitoring subsystems. |
| Package | 48-pin ceramic flatpack (FP48), hermetically sealed for high-reliability applications with 0.75″ × 0.75″ footprint. |
Pinout & Package
48-pin ceramic flatpack (FP48) with 0.050″ lead pitch, hermetic sealing, and MIL-STD-883-compliant construction. Pin 1 index corner marked per JEDEC MO-041.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24, 25) | Ground reference | Three dedicated ground pins minimize ground bounce across dual-port switching transients. |
| VCC (Pin 26) | Power supply | Single 5V supply powers both ports; all VCC pins must be decoupled locally per datasheet layout guidelines. |
| CEL / CER | Chip enable (left/right) | Asynchronous port activation; CE low enables read/write, CE high places port in standby (ISB1/ISB2). |
| OEL / OER | Output enable (left/right) | Controls I/O bus direction: OE low enables output drivers; OE high forces high-impedance tri-state. |
| R/WL / R/WR | Read/write control (left/right) | Active-high write signal; R/W = H → read, R/W = L → write; no separate write-enable pin required. |
| BUSYL / BUSYR | Arbitration flag (open-drain) | Indicates port contention; requires external 4.7kΩ pull-up to VCC; asserts low when opposite port accesses same address. |
| INTL / INTR | Interrupt request (open-drain) | Signals inter-port events (e.g., flag set/reset); requires external pull-up; used for handshake-driven data exchange. |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit address buses support full 1K address space per port; no internal address latching. |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional data (left/right) | 8-bit parallel I/O per port; direction controlled by R/W and OE; no internal bus-hold circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates need for external priority encoders or glue logic in dual-CPU memory sharing, reducing BOM count and PCB area. |
| 2 V data retention | Enables seamless switchover to backup battery during main power failure, preserving critical state in flight control or medical diagnostics. |
| Open-drain BUSY/INT outputs | Allows wired-OR connection of multiple 7130LA devices on shared BUSY/INT lines, simplifying multi-master arbitration schemes. |
| MASTER/SLAVE expandability | Permits 16-bit+ word width systems using IDT7140 SLAVE devices without speed penalty or timing skew penalties. |
| MIL-PRF-38535 QML compliance | Guarantees screening, testing, and traceability for defense/aerospace deployments where radiation tolerance and burn-in are mandatory. |
Applications
| Avionics Flight Control | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: Dual-processor architecture where one CPU handles sensor acquisition and the other executes flight law computations, sharing telemetry buffers. IC Role / Device Role / Timing Role: MASTER 7130LA55J8 serves as shared memory hub with hardware-enforced arbitration preventing simultaneous writes to critical control registers. Use Value: 55 ns access ensures sub-60 ns response latency for closed-loop actuator commands, meeting DO-254 Level A timing budgets. | Use Scenario: Redundant I/O module in a safety-rated PLC requiring non-volatile state retention during AC mains interruption. IC Role / Device Role / Timing Role: 7130LA55J8 provides battery-backed scratchpad memory for ladder logic state variables and diagnostic logs. Use Value: 2 V data retention preserves 1024-byte context for ≥72 hours on coin-cell backup, satisfying IEC 61508 SIL-3 uptime requirements. |
| Military Radar Signal Processing | Medical Imaging Real-Time FIFO |
Use Scenario: High-speed radar front-end with ADC sampling at 40 MSPS feeding into DSP and FPGA processors accessing overlapping memory regions. IC Role / Device Role / Timing Role: 7130LA55J8 acts as ping-pong buffer between ADC interface and processing cores, with BUSY flags preventing pipeline stalls during burst transfers. Use Value: tBDD ≤ 55 ns guarantees deterministic arbitration resolution, eliminating jitter-induced false alarms in pulse-Doppler detection. | Use Scenario: Ultrasound beamformer requiring synchronized read/write access to echo sample buffers by acquisition and reconstruction engines. IC Role / Device Role / Timing Role: 7130LA55J8 functions as zero-wait-state dual-port FIFO, with INTL/INTR enabling frame-ready handshaking between subsystems. Use Value: Asynchronous operation allows independent 55 ns read/write cycles on each port, sustaining 18.2 MB/s aggregate bandwidth for 12-bit pixel streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-55JC | 55 ns access, 1K × 8, but lacks on-chip arbitration logic and 2 V data retention; uses 5V-only supply with higher ISB1 (5 mA vs. 1 mA). | Requires external BUSY logic and separate battery management circuitry; unsuitable for QML-compliant designs. | Select only if arbitration is handled externally and MIL-spec compliance is not required. |
| IDT7140LA55J8 | Same 55 ns timing and LA-grade retention, but SLAVE-only function: no arbitration logic, BUSY inputs instead of outputs, no INT generation. | Cannot operate standalone; must be paired with 7130LA as MASTER; limited to expanded-width memory configurations. | Choose only as companion device in 16-bit+ systems where 7130LA55J8 serves as controller. |
Compared with CY7C133-55JC and IDT7140LA55J8, the 7130LA55J8 uniquely integrates arbitration, interrupt signaling, and battery retention in a single QML-qualified package - essential for autonomous dual-processor systems where firmware-level coordination introduces unacceptable latency.
Availability
7130LA55J8 is available at Aetrix Electronics and suitable for avionics flight control, industrial PLC memory buffering, and military radar signal processing requiring stable component supply across extended product lifecycles.
Supply support for 7130LA55J8 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, acquired by Renesas Electronics in 2019.
The IDT7130/7140 family was designed for deterministic dual-processor memory sharing in aerospace, defense, and industrial automation - prioritizing hardware arbitration, low-latency access, and ruggedized packaging over density or cost.
FAQ
What is the maximum operating temperature range for the 7130LA55J8?
The 7130LA55J8 is rated for industrial temperature operation from –40°C to +85°C, verified per MIL-PRF-38535 QML screening requirements. This range is explicitly confirmed in the "Recommended Operating Temperature and Supply Voltage" table (2689 tbl 03) and applies to all LA-grade variants including 7130LA55J8.
Does the 7130LA55J8 support true dual-port concurrent read/write operations?
Yes, the 7130LA55J8 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/BUSYR to stall the later-arriving write, ensuring data integrity without external logic - a core feature of the MASTER configuration.
What package type is used for the 7130LA55J8, and is it hermetically sealed?
The 7130LA55J8 uses a 48-pin ceramic flatpack (FP48) package, as confirmed in the "Pin Configurations" section (2689 drw 03F) and ordering information. The FP48 variant is hermetically sealed per MIL-STD-883, making it suitable for high-reliability applications exposed to humidity, thermal cycling, or vacuum environments.
Can the 7130LA55J8 retain data when main power drops below 5V?
Yes - the LA suffix denotes low-power battery backup capability. The 7130LA55J8 maintains data integrity down to VCC = 2.0 V, as specified in "Data Retention Characteristics" (2689 tbl 07). This mode draws ≤4000 µA (military/industrial) and requires no external circuitry beyond a 2V backup source.
How does the BUSY arbitration mechanism work on the 7130LA55J8?
The 7130LA55J8 uses hardware arbitration: when both ports attempt access to the same memory location, the earlier-arriving access wins, and the later port's BUSY output (BUSYL or BUSYR) is driven low. This signals the host processor to retry, with tBDD ≤ 55 ns guaranteeing bounded resolution time - detailed in "BUSY TIMING" tables (2689 tbl 11b) and waveform diagrams (2689 drw 12–15).
7130LA55J8 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:
- 55ns
- Access Time:
- 55 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)
7130LA55J8 FAQ
1.How can I place an order for 7130LA55J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA55J8 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 7130LA55J8 reliable?
The price and inventory of 7130LA55J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA55J8 is usually 5 days.
3.What payment methods are accepted for 7130LA55J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA55J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA55J8?
7130LA55J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA55J8 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 7130LA55J8?
For technical support, including 7130LA55J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA55J8 requirements.
6.How does Aetrix verify that 7130LA55J8 is sourced from the original manufacturer or authorized distributors?
All 7130LA55J8 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 7130LA55J8 meets industry standards.
7.What is the process for return or replacement of 7130LA55J8?
All 7130LA55J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA55J8, 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 7130LA55J8 part is unused and in its original packaging.
Return procedure for 7130LA55J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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