## Overview of the AM25LS374AXC The **AM25LS374AXC** is a high-performance electronic component belonging to the **Advanced Low-Power Schottky (ALS/LS)** family of TTL logic. Specifically, it is an **Octal D-Type Edge-Triggered Flip-Flop** with three-state (3-state) outputs. --- ### Core Technical Specifications | Parameter | Specification | | :--- | :--- | | **Logic Family** | LS (Low-Power Schottky) | | **Function** | Octal D-Type Flip-Flop | | **Output Type** | 3-State (Non-inverting) | | **Trigger Type** | Positive-Edge Triggered | | **Voltage Supply (Vcc)** | 4.75V to 5.25V (Standard 5V) | | **Number of Bits** | 8-bit | | **Package Type** | Often found in CDIP or Ceramic Flatpack (X/C suffixes) | --- ### Key Electronic Features 1. **Octal Configuration:** It contains eight individual flip-flops in a single package, sharing a common clock and common output enable. This makes it ideal for handling 8-bit data buses. 2. **3-State Outputs:** The outputs can be placed in a high-impedance state (High-Z). This allows the device to be connected directly to bus-oriented systems without interfering with other devices when not active. 3. **Edge-Triggering:** Information at the **D inputs** that meets the setup time requirements is transferred to the **Q outputs** on the positive-going edge of the clock (CP) pulse. 4. **Low-Power Schottky Technology:** It provides a balance between high-speed operation and low power consumption, typical of the 25LS series developed by AMD. --- ### Pin Functionality The device typically follows a standard 20-pin layout: * **D0 - D7:** Data Inputs (8 bits). * **CP (Clock Pulse):** The pin that triggers the data transfer on a low-to-high transition. * **OE (Output Enable):** When LOW, the outputs are active. When HIGH, the outputs are in a high-impedance state. * **Q0 - Q7:** Data Outputs (8 bits). * **Vcc/GND:** Power supply and Ground pins. --- ### Common Applications * **Data Registers:** Storing 8-bit bytes of information temporarily. * **Bus Buffers:** Interfacing microprocessors with peripheral devices. * **Memory Address Latches:** Holding addresses constant while memory operations are performed. * **I/O Ports:** Acting as an output port for microcontrollers. --- ### Truth Table Summary | OE | CP | D | Q (Output) | | :---: | :---: | :---: | :---: | | L | $\uparrow$ | H | H | | L | $\uparrow$ | L | L | | L | L/H | X | No Change | | H | X | X | High-Z (Floating) | *Key: L=Low, H=High, $\uparrow$=Low-to-High Transition, X=Don't Care*