74LS06 Hex Inverter Buffer/Driver Technical Summary

Overview

The 74LS06 is a monolithic hex inverter buffer/driver integrated circuit belonging to the 74LS (Low-Power Schottky) family of TTL logic devices. It features six independent inverter gates with high-voltage open-collector outputs, designed to interface between TTL logic levels and higher voltage or current circuits. The open-collector configuration allows the outputs to be connected to external pull-up resistors, enabling voltage translation and driving capabilities beyond standard TTL levels.

This device is particularly useful in applications requiring logic inversion combined with the ability to drive higher loads than standard TTL outputs can handle. The 74LS06 is characterized for operation over a temperature range of 0°C to 70°C, making it suitable for commercial applications.

Features

• Hex Inverter Configuration: Six independent inverter gates in a single package.
• Open-Collector Outputs: Allows for voltage translation and driving higher current/voltage loads.
• High-Voltage Output Capability: Outputs can withstand up to 30V, enabling interfacing with higher voltage systems.
• TTL-Compatible Inputs: Inputs are fully compatible with standard TTL logic levels.
• Low Power Consumption: Typical power dissipation of 2mW per gate, characteristic of the LS-TTL family.
• High Sink Current Capability: Outputs can sink up to 40mA, suitable for driving LEDs, relays, and other moderate current loads.
• Wide Operating Temperature Range: 0°C to 70°C commercial temperature range.
• Standard 14-Pin Package: Available in PDIP, SOIC, and other common package options.

Applications

The 74LS06 finds use in a wide variety of digital and interface applications, including:

• Logic Level Translation: Converting TTL signals to higher voltage levels for interfacing with other logic families or peripheral devices.
• LED Drivers: Directly driving LEDs with current sinking capability.
• Relay and Solenoid Drivers: Controlling electromechanical devices requiring higher current than standard TTL outputs can provide.
• Bus Buffering: Serving as interface buffers in bus-oriented systems.
• Waveform Generation: Creating inverted signals for clock generation and timing circuits.
• Industrial Control Systems: Interfacing between control logic and higher voltage/current industrial components.
• Automotive Electronics: Signal inversion and driving applications in vehicle electronic systems.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): 7V
• Input Voltage (Vin): 7V
• Output Voltage (Vout): 30V (open-collector)
• Output Sink Current (Iout): 40mA (per output)
• Operating Temperature Range: 0°C to 70°C
• Storage Temperature Range: -65°C to 150°C

Recommended Operating Conditions

• Supply Voltage (Vcc): 4.75V to 5.25V
• High-Level Input Voltage (Vih): 2V min
• Low-Level Input Voltage (Vil): 0.8V max
• Output High Voltage (Voh): Determined by external pull-up (up to 30V)
• Output Low Voltage (Vol): 0.5V max (at 16mA sink current)
• Input Clamp Diode Voltage (Vik): -1.5V max (at -18mA)

DC Electrical Characteristics

• Input High Current (Iih): 20µA max (at Vih = 2.7V)
• Input Low Current (Iil): -0.4mA max (at Vil = 0.4V)
• Output Low Current (Iol): 40mA max (per output)
• Supply Current (Icc): 4.4mA max (all gates switching)

AC Electrical Characteristics

• Propagation Delay (tPLH, tPHL): 15ns max (from input to output)
• Output Transition Time (tTLH, tTHL): 15ns max

Package Information

The 74LS06 is available in several standard package options:

14-Pin Plastic Dual In-Line Package (PDIP)

• Package Code: N
• Dimensions: 19.3mm x 6.35mm body
• Pin Spacing: 2.54mm (0.1") between pins, 7.62mm (0.3") row spacing
• Operating Temperature: 0°C to 70°C

14-Pin Small Outline Integrated Circuit (SOIC)

• Package Code: D
• Dimensions: 8.65mm x 3.9mm body
• Pin Spacing: 1.27mm (0.05") between pins
• Operating Temperature: 0°C to 70°C

Pin Configuration

The 74LS06 features the following pinout configuration:

• Pin 1: Input A
• Pin 2: Output A (open-collector)
• Pin 3: Input B
• Pin 4: Output B (open-collector)
• Pin 5: Input C
• Pin 6: Output C (open-collector)
• Pin 7: Ground (GND)
• Pin 8: Output D (open-collector)
• Pin 9: Input D
• Pin 10: Output E (open-collector)
• Pin 11: Input E
• Pin 12: Output F (open-collector)
• Pin 13: Input F
• Pin 14: Vcc (+5V supply)

Design Considerations

When using the 74LS06 in circuit designs, several important factors should be considered:

• Pull-up Resistor Selection: The open-collector outputs require external pull-up resistors. The resistor value should be chosen based on the desired output rise time and power dissipation.
• Power Supply Decoupling: A 0.1µF