The **7130LA55JGI8** is a high-performance, high-speed **Dual-Port Static RAM (SRAM)** integrated circuit manufactured by Renesas Electronics (formerly IDT - Integrated Device Technology). --- ## 1. Core Technical Specifications This component is designed to allow two independent ports (Left and Right) to access a common memory array simultaneously. | Parameter | Specification | | :--- | :--- | | **Memory Size** | 8 Kbit (1K x 8) | | **Access Time** | 55 ns | | **Interface** | Parallel (Dual-Port) | | **Voltage Supply** | 4.5V ~ 5.5V | | **Current (Operating)** | 180 mA (Max) | | **Package Type** | PLCC-52 (Plastic Leaded Chip Carrier) | | **Temperature Range** | -40°C ~ +85°C (Industrial Grade) | --- ## 2. Pinout and Internal Architecture The device features a unique architecture to manage data contention between the two ports. ### Key Functional Blocks: * **Memory Array:** 1,024 words of 8 bits each. * **Address/Data Pins:** Independent sets for both Left ($A_{0L}-A_{9L}$, $I/O_{0L}-I/O_{7L}$) and Right ($A_{0R}-A_{9R}$, $I/O_{0R}-I/O_{7R}$) ports. * **Control Logic:** Includes Chip Enable ($\overline{CE}$), Read/Write ($\text{R}/\overline{W}$), and Output Enable ($\overline{OE}$). * **Arbitration Logic:** Includes **Busy Pins** ($\overline{BUSY}$) and **Interrupts** ($\overline{INT}$) to prevent data corruption when both sides try to write to the same address simultaneously. --- ## 3. Detailed Part Number Breakdown Understanding the suffix and prefix of **7130LA55JGI8**: | Segment | Meaning | | :--- | :--- | | **7130** | Model Number (1K x 8 Dual-Port SRAM) | | **LA** | Low Power Version | | **55** | 55 nanoseconds (Access Speed) | | **JG** | Package Code: PLCC (Plastic Leaded Chip Carrier) | | **I** | Temperature Grade: Industrial ($-40^\circ\text{C}$ to $+85^\circ\text{C}$) | | **8** | Tape and Reel Packaging | --- ## 4. Typical Applications Because this chip allows two processors to share data without the need for complex bus arbitration or wait states, it is commonly used in: * **Dual-Processor Systems:** Sharing data between a DSP and a Microcontroller. * **Communications Hardware:** Buffering data between network interfaces. * **Industrial Controllers:** Managing real-time data flow between a control unit and an I/O processor. ---