Octal 3-state Inverting Buffer IC - 74HC540
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The 74HC Series 74HC540 is a 20 Pin Octal 3-state Inverting Buffer IC having a 2V to 6V Operating Voltage range with a 6mA output current. The 3-STATE buffers utilize advanced silicon-gate CMOS technology. They possess high drive current outputs, enabling high-speed operation even when driving large bus capacitances.
These circuits achieve speeds comparable to low-power Schottky devices while retaining the advantage of CMOS circuitry, i.e., high noise immunity, and low power consumption. Both devices have a fanout of 15 LS-TTL equivalent inputs. The 74HC540 is an inverting buffer and the MM74HC541 is a non-inverting buffer. The 3-STATE control gate operates as a two-input NOR such that if either G1 or G2 is HIGH, all eight outputs are in the high-impedance state.
| Supply Voltage | ? 0.5 to + 7.0V |
| DC Input Voltage | –0.5 to VCC + 0.5 |
| DC Output Voltage | ?0.5 ? VO ? VCC + 0.5 |
| DC Input Diode Current | ±20 mA |
| DC Output Diode Current | ±35 mA |
| Output Current | ± 35 mA |
| DC VCC or GND Current, per pin | ± 75 mA |
| Storage Temperature Range | ? 65°C to + 150 °C |
| Power Dissipation | 500 mW |
| Lead Temperature | 260 °C |
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