The HD74LS06FP from Hitachi is a Hex Inverting Buffer/Driver with Open-Collector High-Voltage Outputs. This device consists of six independent inverting buffers, each with an open-collector output capable of withstanding high voltages. The 74LS06 is commonly used in applications requiring interfacing to high-voltage loads, driving relays, or implementing wired-AND logic functions.

Applications

• Interfacing to high-voltage loads
• Driving relays
• Driving lamps
• Wired-AND logic implementation
• Level shifting

Features

• High-voltage open-collector outputs: up to 30V
• Low-power Schottky TTL circuitry
• High sink current capability: up to 40 mA
• Inverting buffer configuration

Benefits

• Allows interfacing with high-voltage devices and circuits
• Provides efficient driving of relays and other inductive loads
• Enables the implementation of wired-AND logic functions
• Reduces power consumption compared to standard TTL

Additional Details

The HD74LS06FP features six independent inverting buffers, each with an open-collector output stage. The open-collector outputs allow the device to interface with loads operating at voltages higher than the supply voltage of the IC itself (up to 30V). An external pull-up resistor is required for each output to establish the high logic level. The high sink current capability of the outputs enables them to directly drive relays, lamps, and other high-current loads. The inverting buffer configuration provides a logic inversion between the input and output signals. The low-power Schottky TTL circuitry reduces power consumption compared to standard TTL devices.

The wired-AND function is implemented by connecting the open-collector outputs of multiple 74LS06 gates together with a single pull-up resistor. The output will be low if any of the gates have a low output, effectively performing an AND function. The device is useful when needing to switch higher voltage signals than the typical TTL range.