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Renesas 7130LA55P
- Part No.:
- 7130LA55P
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 48-DIP (0.600", 15.24mm)
- Datasheet:
-
7130LA55P.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 48DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,114
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Product details
Overview
7130LA55P from IDT is a high-speed 1K × 8 dual-port static RAM with master arbitration logic, 55 ns maximum read/write cycle time, 1 mA typical standby current, and 2 V battery-backed data retention - used in real-time inter-processor communication systems requiring concurrent access without external logic.
For engineers reviewing the 7130LA55P datasheet, 7130LA55P pinout, 7130LA55P application, or 7130LA55P equivalent, this page delivers verified timing parameters, port arbitration behavior, BUSY/INT flag operation, low-power retention mode, and package-specific I/O mapping for immediate design integration.
Technical Context
The 7130LA55P implements fully asynchronous dual-port architecture with independent left/right address, control, and data buses. Its on-chip arbitration logic resolves contention via BUSY flag assertion when both ports access the same memory location, with tBDD = 55 ns (max) defining valid data recovery after BUSY deassertion.
It supports R/W-controlled and CE-controlled write cycles, open-drain BUSY outputs requiring external pull-ups, and interrupt signaling via INTL/INTR pins. The LA variant enables data retention at VCC = 2.0 V with ICCDR ≤ 4000 µA (military grade), distinguishing it from SA versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact dual-access buffer storage |
| Access Time | 55 ns max (tAA, tACE, tAOE), guaranteeing deterministic latency for real-time embedded control loops |
| Standby Current | 1 mA typical (ISB3, CMOS-level CE), critical for battery-powered fail-safe subsystems |
| Data Retention | 2.0 V minimum VCC, supporting backup power during main supply interruption without data loss |
| Supply Voltage | 4.5–5.5 V (VCC), TTL-compatible interface simplifying integration with legacy 5 V logic families |
| Operating Temp | −40°C to +85°C (industrial grade), validated for deployment in automotive ECUs and industrial PLCs |
| Package | 48-pin ceramic flatpack (FP48), hermetically sealed for high-reliability aerospace and defense applications |
Pinout & Package
7130LA55P is housed in a 48-pin ceramic flatpack (FP48) with 0.75″ × 0.75″ footprint and 0.11″ height, featuring dual-row gull-wing leads and index mark at Pin 1. All VCC (Pins 24, 39) and GND (Pins 1, 25) connections must be decoupled locally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A9L | Left port address inputs | 10-bit address bus for left-side memory access; latched on CE or R/W transition |
| A0R–A9R | Right port address inputs | Independent 10-bit address bus enabling simultaneous but non-conflicting reads/writes |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit tri-state I/O; direction controlled by R/WL and OEL; high-impedance when disabled |
| I/O0R–I/O7R | Right port bidirectional data | Electrically isolated from left port; no shared bus loading or timing coupling |
| CEL, CER | Chip enable (active low) | Port-selective power-down: ISB2 = 45 mA (one port active), ISB1 = 35 mA (both idle) |
| OEL, OER | Output enable (active low) | Controls output drivers only; does not affect internal memory state or arbitration logic |
| R/WL, R/WR | Read/write control (active high = read) | Determines data flow direction per port; write pulse width tWP ≥ 30 ns required for 55 ns version |
| BUSYL, BUSYR | Open-drain busy flags | Asserted low during port contention; require external 4.7 kΩ pull-up to VCC for proper logic level |
| INTL, INTR | Interrupt request outputs | Flag set/reset via dedicated address patterns (e.g., A9–A0 = 3FFH); edge-triggered handshake |
| VCC, GND | Power and ground | Two VCC pins (24, 39) and two GND pins (1, 25) minimize IR drop and noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Eliminates need for external priority encoder or glue logic in dual-CPU systems |
| 2 V data retention | Enables seamless switchover to backup battery without volatile data loss during brownout |
| Asynchronous dual-port operation | Permits independent clock domains - e.g., DSP writes while microcontroller reads - with no synchronization overhead |
| Open-drain BUSY outputs | Allows wired-OR connection of multiple 7130LA55P devices for scalable shared-memory clusters |
| Interrupt signaling via address match | Reduces software polling overhead by generating hardware interrupts on specific memory-mapped events |
Applications
| Real-Time Inter-Processor Communication | Dual-Core DSP Memory Buffer |
|---|---|
Use Scenario: Two microcontrollers exchange sensor fusion results and actuator commands through shared memory without bus contention. IC Role / Device Role / Timing Role: 7130LA55P acts as a contention-managed mailbox with BUSY arbitration and INT signaling. Use Value: Eliminates software semaphores and reduces inter-core latency to ≤55 ns, improving closed-loop response time. | Use Scenario: A motor control DSP writes PWM update values while a safety monitor CPU reads them for validation. IC Role / Device Role / Timing Role: 7130LA55P provides simultaneous, atomic read/write access with hardware-enforced write inhibition during conflict. Use Value: Guarantees data coherency without CPU intervention, meeting ISO 26262 ASIL-B timing constraints. |
| Avionics Data Logger Buffer | Industrial PLC Dual-Task Memory |
Use Scenario: Flight data recorder captures telemetry from multiple sensors using one port while host processor retrieves logs via the other. IC Role / Device Role / Timing Role: 7130LA55P serves as a non-blocking circular buffer with 2 V retention preserving last 1K samples during power loss. Use Value: Meets DO-160E power interruption requirements with zero firmware recovery delay. | Use Scenario: PLC executes motion control (task A) and HMI update (task B) on separate CPUs sharing configuration and status variables. IC Role / Device Role / Timing Role: 7130LA55P functions as a deterministic shared variable space with tBDD = 55 ns ensuring predictable worst-case read-after-write latency. Use Value: Enables deterministic task scheduling without jitter from software mutexes or cache coherency protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-55AXC | 55 ns access, 2K × 16 organization, 3.3 V core (5 V tolerant I/O), no built-in arbitration | Requires external logic for BUSY/INT generation; higher density but wider data path | Select when 16-bit data width and lower voltage operation are prioritized over integrated arbitration. |
| IDT7140LA55P | Same 55 ns speed and LA retention, but SLAVE-only - lacks on-chip arbitration and BUSY output | Must be paired with a MASTER 7130; cannot operate standalone as arbitration node | Choose only in MASTER/SLAVE configurations where expansion beyond 1K × 8 is needed. |
Compared with CY7C024AV-55AXC and IDT7140LA55P, the 7130LA55P uniquely integrates arbitration logic and open-drain BUSY outputs in a 1K × 8 footprint, making it the only self-contained solution for simple dual-processor systems requiring zero external logic.
Availability
7130LA55P is available at Aetrix Electronics and suitable for real-time inter-processor communication, avionics data logging, and industrial PLC dual-task memory applications requiring stable component supply across extended product lifecycles.
Supply support for 7130LA55P 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 timing, memory, and interface solutions, now part of Renesas Electronics.
The 7130LA55P belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency shared memory in safety-critical embedded systems where hardware arbitration eliminates software race conditions.
FAQ
What is the guaranteed data retention voltage for the 7130LA55P?
The 7130LA55P guarantees data retention down to VCC = 2.0 V at TA = +25°C, with ICCDR ≤ 4000 µA under military-grade conditions. This enables reliable operation during brownout or battery-backup scenarios without data corruption. The 7130LA55P does not retain data below 2.0 V, and retention time is indefinite as long as voltage remains ≥2.0 V and temperature stays within specification limits.
Does the 7130LA55P support true simultaneous read/write operations on both ports?
Yes - the 7130LA55P supports fully asynchronous, simultaneous access: one port can read while the other writes, provided addresses differ. If both ports access the same address, on-chip arbitration asserts BUSYL/BUSYR to inhibit the later-arriving write, ensuring data integrity. The 7130LA55P implements this without external logic or clock synchronization.
How are the BUSY pins configured on the 7130LA55P, and what external components are required?
The BUSYL and BUSYR pins on the 7130LA55P are open-drain outputs requiring external pull-up resistors to VCC. A 4.7 kΩ resistor is recommended per pin to ensure VIH ≥ 2.2 V under load. These signals go low during port contention and remain low until arbitration resolves - the 7130LA55P does not drive them high actively.
Can the 7130LA55P be used without external arbitration logic in a dual-CPU system?
Yes - the 7130LA55P contains complete on-chip arbitration logic, including tAPS = 5 ns setup time and tBDD = 55 ns valid-data recovery. It autonomously manages contention between left and right ports using BUSY flag assertion, eliminating the need for external priority encoders, CPLDs, or software semaphores in dual-CPU designs.
What is the difference between the 7130LA55P and the 7140LA55P?
The 7130LA55P is a MASTER dual-port SRAM with on-chip arbitration, BUSY outputs, and interrupt generation. The 7140LA55P is a SLAVE device: it accepts BUSY inputs but lacks arbitration logic and cannot generate BUSY flags. The 7130LA55P operates standalone; the 7140LA55P requires pairing with a 7130LA55P to form a 16-bit-wide memory system.
7130LA55P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 48-PDIP
7130LA55P FAQ
1.How can I place an order for 7130LA55P through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA55P 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 7130LA55P reliable?
The price and inventory of 7130LA55P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA55P is usually 5 days.
3.What payment methods are accepted for 7130LA55P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA55P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA55P?
7130LA55P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA55P 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 7130LA55P?
For technical support, including 7130LA55P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA55P requirements.
6.How does Aetrix verify that 7130LA55P is sourced from the original manufacturer or authorized distributors?
All 7130LA55P 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 7130LA55P meets industry standards.
7.What is the process for return or replacement of 7130LA55P?
All 7130LA55P units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA55P, 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 7130LA55P part is unused and in its original packaging.
Return procedure for 7130LA55P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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