The part number **7142LA55L48GI8** refers to a high-performance **Static RAM (SRAM)** integrated circuit. This specific part is a Dual-Port RAM, which allows two independent systems (or buses) to access the same memory space simultaneously. Below is a detailed breakdown of the technical specifications and identification of this component based on the IDT (now Renesas) naming convention. ### 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Manufacturer** | Renesas Electronics (formerly IDT) | | **Memory Type** | CMOS Dual-Port Static RAM (SRAM) | | **Density** | 16 Kbit (2K x 8-bit) | | **Access Time** | 55 nanoseconds (ns) | | **Power Consumption** | Low Power (L) | | **Package Type** | LCC (Leadless Chip Carrier) - 48 Pins | | **Temperature Grade** | Industrial (-40°C to +85°C) | | **Status** | Legacy/Specialized Component | --- ### 2. Part Number Deciphering (Nomenclature) To understand this electronic part, we can break down the alphanumeric string: * **7142**: The base model number. It indicates a **2K x 8 Dual-Port SRAM** with slave functionality (often used in conjunction with a "Master" chip like the 7132 to handle contention). * **LA**: Indicates **Low Power** version. These chips have lower standby power consumption compared to standard "SA" versions. * **55**: Represents the **Speed**. This chip has a maximum access time of **55ns**. * **L48**: Refers to the **Package Code**. This is a 48-pin rectangular Leadless Chip Carrier (LCC). * **G**: Indicates **Industrial Temperature Range**. It is rated for operation between -40°C and +85°C. * **I**: (Sometimes used interchangeably with G or as a suffix for lead-free/RoHS compliance markers depending on the manufacturing year). * **8**: Signifies **Tape and Reel** packaging for automated assembly. --- ### 3. Key Functional Features * **True Dual-Ported Memory:** It allows simultaneous reads and writes from two separate ports (Left and Right). * **Conflict Resolution:** Because it is the "Slave" (7142), it relies on the "Busy" signals generated by a "Master" (7132) or external logic to prevent data corruption if both ports try to write to the same address at once. * **Low Power CMOS:** Utilizes CMOS technology for high speed with significantly lower power requirements than older bipolar or NMOS memories. * **Asynchronous Operation:** The ports operate independently; they do not require a shared clock signal. --- ### 4. Applications This type of component is typically found in: 1. **Communications Systems:** Buffering data between two different processors. 2. **Digital Signal Processing (DSP):** Passing data between a CPU and a dedicated DSP chip. 3. **Industrial Controls:** Interfacing a high-speed controller with a slower peripheral bus. 4. **Legacy Aerospace/Defense:** Often used in ruggedized environments due to the LCC packaging and industrial temperature rating.