Philips 74F240 Octal Inverting Buffer (3-State) Datasheet

Category: Electronics, Logic ICS, NXP

The Philips Semiconductors 74F240 datasheet provides detailed information on the 74F240 Octal inverting buffer, a component designed for high-performance bus interfacing with 3-state buffering capabilities. This datasheet, which supersedes the data of March 18, 2002, was updated on February 25, 2004, outlining key features, ordering information, and technical specifications for the integrated circuit (IC).

Main Features

The 74F240 IC is engineered as an octal bus interface which supports eight inverting buffer gates with 3-state outputs. The device is distinguished by its capacity to sink current up to 64 mA and source up to 15 mA, suitable for driving bus lines or buffer memory address registers. The IC integrates two output enable controls, each managing four of the eight 3-state outputs.

Electrical Specifications

The typical propagation delay for the 74F240 is 4.3 ns, ensuring swift signal transition, and it operates with a typical supply current of 37 mA, suitable for various applications that require efficient power consumption. For its stable operation, the supply voltage (Vcc) is specified at 5 V ±10%, and the ambient operating temperature ranges from 0°C to 70°C.

Ordering Information

Different packaging options are available for the 74F240, which include a 20-pin plastic DIP (Order Code: NZ4F24ON, Package Drawing: SOT146-1), a 20-pin plastic SOL (Order Code: N74F240D, Package Drawing: SOT163-1), and a 20-pin plastic SSOP (Order Code: N74F240DB, Package Drawing: SOT339-1).

Technical Parameters

Input and output loading values are key factors in the circuit design; the 74F240 has a fan-out capacity detailed in the datasheet. For example, the load values for data inputs (lan, Ibn) are specified as 20 µA HIGH/1.0 mA LOW, while output enable inputs (OEa, OEb) have a load value of 20 µA HIGH/0.2 mA LOW. The data outputs (Yan, Ybn) can manage an impressive 750 µA HIGH/106.7 mA LOW.

Physical Configuration

The pin configuration is provided in a detailed diagram, with clear labels for all inputs, outputs, and enabling pins, as well as Vcc (Pin 20), and ground (GND Pin 10). The logic symbol representation also provides visual clarification on how the IC functions within a circuit.

Conclusion

The Philips 74F240 datasheet is essential for engineers and designers in need of an octal inverting buffer with 3-state output capabilities. It provides ample technical data for integrating the IC into systems requiring efficient power usage and high current sinking and sourcing capability for bus-driving applications.