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Renesas 7130LA55J
- Part No.:
- 7130LA55J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7130LA55J.pdf
- Description:
- IC SRAM 8KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
7130LA55J from IDT is a high-speed 1K × 8 dual-port static RAM configured as a MASTER device with on-chip arbitration logic, 55 ns maximum read cycle time, 1 µA full-standby current (CMOS-level inputs), and battery backup data retention at 2 V. It enables real-time interprocessor communication in embedded control systems requiring concurrent access to shared memory.
For engineers reviewing the 7130LA55J datasheet, 7130LA55J pinout, 7130LA55J application, or 7130LA55J equivalent, this page delivers verified timing parameters, port arbitration behavior, BUSY/INT flag operation, low-power retention specs, and validated alternative part selection guidance for dual-port SRAM-based designs.
Technical Context
The 7130LA55J implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves contention via BUSY output assertion when both ports access the same address, with tBDD ≤ 35 ns (55 ns speed grade) ensuring deterministic resolution.
It supports R/W-controlled and CE-controlled write cycles, includes open-drain BUSY outputs requiring external pull-ups, and provides INTL/INTR flags for port-to-port interrupt signaling. Battery backup mode operates at VCC = 2.0 V with guaranteed data retention and ICCDR ≤ 4000 µA (military/industrial).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1K × 8 bits (1024 words × 8-bit wide), enabling compact shared-memory buffers without external width expansion. |
| Access Time | 55 ns max read cycle time - defines minimum clock period for synchronous interface or maximum bus frequency in asynchronous systems. |
| Standby Current | 1 µA (ISB3, CMOS-level inputs) - enables ultra-low-power sleep modes in battery-backed industrial controllers. |
| Data Retention | 2.0 V minimum VCC - allows direct connection to coin-cell or backup rail without regulator, retaining data during main power loss. |
| Supply Voltage | 4.5–5.5 V - compatible with standard TTL/5V logic families and legacy industrial power rails. |
| Operating Temp | –40°C to +85°C - qualified for industrial temperature range, supporting deployment in harsh environments. |
| Arbitration Logic | On-chip port arbitration with BUSY output - eliminates need for external logic to manage simultaneous access conflicts. |
Pinout & Package
7130LA55J is supplied in a 48-pin ceramic flatpack (FP48) package measuring approximately 0.75 in × 0.75 in × 0.11 in, with through-hole mounting and hermetic sealing suitable for high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 24) | Ground reference | Two dedicated ground pins reduce ground bounce and improve noise immunity across both ports. |
| VCC (Pin 25) | 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) | Independent enables allow selective activation of each port, enabling partial memory power gating. |
| OEL / OER | Output enable (left/right) | Controls tri-state of I/O drivers; high-Z state prevents bus contention during inactive reads/writes. |
| R/WL / R/WR | Read/write direction (left/right) | Active-high logic determines port data flow direction; no internal latching - requires stable level during access. |
| BUSYL / BUSYR | Arbitration status (open-drain) | Asserted low when opposite port accesses same address; requires external pull-up resistor per datasheet Note 1. |
| INTL / INTR | Interrupt flag (open-drain) | Signals inter-port events (e.g., flag set/clear); also requires external pull-up for proper logic level translation. |
| A0L–A9L / A0R–A9R | Address inputs (left/right) | 10-bit addressing per port supports full 1K memory map; no internal address latching - address must be stable before CE/OE assertion. |
| I/O0L–I/O7L / I/O0R–I/O7R | Bi-directional data (left/right) | 8-bit parallel I/O per port; drivers automatically switch direction based on R/W and OE states - no external transceivers needed. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip arbitration logic | Resolves simultaneous left/right port access to identical addresses without external logic, reducing BOM count and PCB area. |
| Battery backup data retention | Maintains stored data at 2.0 V VCC, enabling seamless failover to backup power in critical control systems. |
| Open-drain BUSY/INT outputs | Supports wired-OR interrupt sharing and flexible voltage-level translation via external pull-up resistors. |
| Ultra-low ISB3 standby current | 1 µA (CMOS-level inputs) enables multi-year battery life in always-on monitoring nodes with periodic wake-up. |
| Master-only BUSY generation | Only IDT7130 variants (not IDT7140 slaves) drive BUSY outputs - simplifies system-level arbitration topology planning. |
Applications
| Real-Time Interprocessor Communication | Dual-CPU Shared Memory Buffer |
|---|---|
Use Scenario: Two independent microcontrollers exchange sensor data and control commands via shared memory without software handshaking. IC Role / Device Role / Timing Role: 7130LA55J acts as MASTER dual-port SRAM providing concurrent, conflict-free read/write access with hardware arbitration. Use Value: Eliminates polling delays and race conditions; tBDD ≤ 35 ns ensures deterministic response to address contention. | Use Scenario: A safety-critical PLC uses separate CPUs for control execution and diagnostics, sharing status registers and fault logs. IC Role / Device Role / Timing Role: 7130LA55J serves as non-volatile shared buffer with 2 V data retention during main power interruption. Use Value: Guarantees continuity of operational state across brownouts; ISB3 = 1 µA extends backup battery life beyond 5 years. |
| Industrial Motion Controller | Avionics Data Acquisition Hub |
Use Scenario: Servo drive firmware reads trajectory tables while motion engine writes position feedback - both accessing same memory region. IC Role / Device Role / Timing Role: 7130LA55J functions as low-latency shared memory with 55 ns access, synchronized via BUSY/INT handshake. Use Value: Enables sub-microsecond coordination between real-time tasks; eliminates need for FIFO buffering or DMA arbitration logic. | Use Scenario: Flight data recorder aggregates sensor streams from multiple avionics buses into time-stamped buffers before storage. IC Role / Device Role / Timing Role: 7130LA55J operates as radiation-tolerant (ceramic FP48) dual-port buffer interfacing ARINC 429 and MIL-STD-1553 controllers. Use Value: Hermetic ceramic package and –40°C to +85°C rating ensure reliability in extended flight envelope; 55 ns timing meets deterministic sampling deadlines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C131-55JC | 55 ns access, 1K × 8, but no on-chip arbitration logic; BUSY must be implemented externally. | Requires additional discrete logic for contention management; increases layout complexity and failure points. | Select when arbitration is handled at firmware level or when cost sensitivity outweighs integration benefit. |
| IDT7140LA55J | Same speed grade and retention, but SLAVE-only: accepts BUSY input, lacks arbitration logic and BUSY output. | Must be paired with a MASTER (e.g., 7130LA55J) to form 16-bit+ systems; cannot operate standalone as arbitration node. | Choose only for width-expansion configurations where 7130LA55J serves as master and 7140LA55J as slave. |
Compared with CY7C131-55JC, 7130LA55J reduces system-level design effort by integrating arbitration; compared with IDT7140LA55J, it provides autonomous conflict resolution essential for single-dual-port topologies.
Availability
7130LA55J is available at Aetrix Electronics and suitable for industrial motion control, avionics data acquisition, real-time interprocessor communication, and dual-CPU shared memory buffer applications requiring stable component supply across extended product lifecycles.
Supply support for 7130LA55J 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, low-latency dual-ported memory applications in industrial control, military systems, and embedded communications where hardware arbitration and battery backup are mandatory.
FAQ
What is the function of BUSYL and BUSYR on the 7130LA55J?
BUSYL and BUSYR are open-drain arbitration status outputs on the 7130LA55J. When asserted low, they indicate that the opposite port is accessing the same memory address, inhibiting writes on the affected port. External pull-up resistors are required per datasheet Note 1. This hardware arbitration eliminates software polling and ensures deterministic conflict resolution without external logic.
Does the 7130LA55J support true dual-port operation without external arbitration logic?
Yes, the 7130LA55J integrates on-chip arbitration logic and generates BUSY outputs, enabling true concurrent access from left and right ports without external components. Unlike SLAVE devices such as IDT7140LA55J, the 7130LA55J autonomously manages contention - making it suitable as a standalone dual-port node in interprocessor communication systems.
What is the minimum supply voltage for data retention on the 7130LA55J?
The 7130LA55J guarantees data retention down to 2.0 V VCC, as specified in Table 7 (Data Retention Characteristics). This allows direct connection to backup batteries or supercapacitors without regulation. At VCC = 2.0 V, ICCDR is ≤ 4000 µA (military/industrial grade), supporting long-duration holdover in critical infrastructure applications.
How does the 7130LA55J differ from the IDT7140LA55J in terms of port functionality?
The 7130LA55J is a MASTER device with on-chip arbitration logic and BUSY outputs, while the IDT7140LA55J is a SLAVE device that accepts BUSY as an input and lacks arbitration circuitry. The 7130LA55J can operate independently; the 7140LA55J must be paired with a MASTER to resolve contention. Both share identical timing (55 ns), retention (2 V), and packaging.
What package type is used for the 7130LA55J, and what are its key mechanical properties?
The 7130LA55J is packaged in a 48-pin ceramic flatpack (FP48), with dimensions approximately 0.75 in × 0.75 in × 0.11 in. This hermetically sealed package provides superior moisture resistance and thermal stability, meeting requirements for high-reliability industrial and aerospace deployments where plastic packages may degrade under thermal cycling or humidity stress.
7130LA55J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- 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:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7130LA55J FAQ
1.How can I place an order for 7130LA55J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7130LA55J 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 7130LA55J reliable?
The price and inventory of 7130LA55J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7130LA55J is usually 5 days.
3.What payment methods are accepted for 7130LA55J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7130LA55J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7130LA55J?
7130LA55J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7130LA55J 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 7130LA55J?
For technical support, including 7130LA55J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7130LA55J requirements.
6.How does Aetrix verify that 7130LA55J is sourced from the original manufacturer or authorized distributors?
All 7130LA55J 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 7130LA55J meets industry standards.
7.What is the process for return or replacement of 7130LA55J?
All 7130LA55J units undergo pre-shipment inspection (PSI). If there is an issue with 7130LA55J, 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 7130LA55J part is unused and in its original packaging.
Return procedure for 7130LA55J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7130LA55J Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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