This datasheet provides detailed information about the 74F540 Octal Inverter Buffer (3-State) and 74F541 Octal Buffer (3-State), which are electronic components designed for high-performance interfacing and bus-driving applications. Manufactured by Philips Semiconductors, these integrated circuits are part of the extensive 74F series optimized for low power consumption and high-speed performance.
Key Features:
The 74F540 and 74F541 buffers are lauded for several key features including:
- High impedance NPN base inputs, providing reduced loading of 20uA in both high and low states.
- Low power consumption and minimal bus loading characteristics noteworthy for integrated circuits.
- Functional similarity to models 74F240 and 74F241, along with improvements in microprocessor interfacing.
- An efficient pinout design enabling easier printed circuit board (PCB) layout.
- 3-State buffer outputs with the capability to sink 64mA and source up to 15mA.
Electrical Characteristics:
The 74F540 demonstrates a propagation delay of 3.5ns and a typical supply current of 58mA. The 74F541, on the other hand, shows a slightly longer propagation delay of 5.5ns and a similar supply current of 55mA.
Ordering Information:
These integrated circuits are available in a commercial temperature range (0°C to +70°C). The 74F540 is offered in a 20-pin Plastic DIP package (N74F540, N74F54IN) with drawing number SOT146-1, while the 74F541 is available in a 20-pin Plastic SOL package (N74F54OD, N74F541D) with drawing number SOT163-1.
Device Description:
The 74F540 and 74F541 are designed primarily as octal buffers suitable for driving bus lines and buffering memory address registers. With the facility to handle significant output currents, they are capable of producing robust capacitive drive characteristics.
Input and Output Loading and Fan-Out Table:
This section of the datasheet specifies the current loading and fan-out capacity for various pins on the IC. Inputs and output enable pins are listed with a high and low load value of 20pA/20uA. The data outputs for 74F540 and 74F541 can sustain 15mA source and 64mA sink currents, indicating the chips’ suitability for interfacing with a wide range of other digital components.
Pin Configuration:
The datasheet provides the pin configuration for both 74F540 and 74F541, helping users understand the physical layout and connectivity of the integrated circuits for proper implementation in electronic circuit designs.
References:
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