74AS00 Quad 2-Input NAND Gate

Overview

The 74AS00 is a high-performance integrated circuit belonging to the 74AS (Advanced Schottky) series of logic devices. It contains four independent 2-input NAND gates, each performing the Boolean logic function Y = A•B or Y = (A ∧ B)'. The 74AS00 is designed for high-speed digital applications where fast propagation delays and low power dissipation are critical. Built using advanced Schottky technology, this device offers improved speed and power efficiency compared to standard TTL logic families.

This component is particularly suitable for high-speed logic systems, microprocessor interfaces, and other digital applications requiring reliable NAND gate functionality. The 74AS00 operates over a wide temperature range and is available in multiple package options to accommodate various design requirements.

Key Features

• Quad 2-Input NAND Gates: Four independent gates in a single package
• Advanced Schottky Technology: Provides faster switching speeds than standard TTL
• High-Speed Operation: Typical propagation delay of 4.5 ns
• Low Power Consumption: 8mA typical low power dissipation
• Wide Operating Voltage Range: 4.5V to 5.5V
• High Noise Immunity: Typical noise margin of 400mV
• Temperature Range: Operates from -40°C to +85°C
• Multiple Package Options: Available in PDIP, SOIC, and other industry-standard packages
• TTL-Compatible Inputs: Fully compatible with TTL input logic levels
• High Output Drive Capability: Can drive up to 15 LSTTL loads

Applications

The 74AS00 finds use in a wide variety of digital systems and applications, including:

• High-speed logic systems
• Microprocessor and microcontroller interfaces
• Digital signal processing
• Data communication equipment
• Industrial control systems
• Test and measurement equipment
• Memory address decoding
• Clock distribution networks
• General purpose logic circuits
• Digital arithmetic circuits

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): 7V
• Input Voltage (Vin): 7V
• Operating Free Air Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (Vcc): 4.5V to 5.5V
• High-Level Input Voltage (VIH): 2V min
• Low-Level Input Voltage (VIL): 0.8V max
• Operating Temperature: -40°C to +85°C

DC Electrical Characteristics

• High-Level Output Voltage (VOH): 2.7V min (Vcc = 4.5V, IOH = -1mA)
• Low-Level Output Voltage (VOL): 0.5V max (Vcc = 4.5V, IOL = 20mA)
• Input Clamp Voltage (VIK): -1.5V max (Vcc = 4.5V, II = -18mA)
• High-Level Input Current (IIH): 20μA max (Vcc = 5.5V, VI = 2.7V)
• Low-Level Input Current (IIL): -0.6mA max (Vcc = 5.5V, VI = 0.5V)
• Short-Circuit Output Current (IOS): -30mA to 100mA
• Supply Current (ICC): 8mA typical (per gate, Vcc = 5V)

AC Electrical Characteristics

• Propagation Delay (tPLH, tPHL): 4.5ns typical (CL = 15pF, RL = 500Ω)
• Output Transition Time (tTLH, tTHL): 3ns typical
• Input Capacitance (Cin): 3pF typical
• Power Dissipation Capacitance (CPD): 20pF typical

Package Information

The 74AS00 is available in several industry-standard packages:

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

• Package Code: N
• Dimensions: 19.3mm x 6.35mm x 4.57mm
• Pin Pitch: 2.54mm
• Lead Material: Alloy 42
• Lead Finish: Matte Tin

14-Pin Small Outline Integrated Circuit (SOIC)

• Package Code: D
• Dimensions: 8.65mm x 3.9mm x 1.5mm
• Pin Pitch: 1.27mm
• Lead Material: Copper Alloy
• Lead Finish: Matte Tin

14-Pin Thin Shrink Small Outline Package (TSSOP)

• Package Code: PW
• Dimensions: 5mm x 4.4mm x 1mm
• Pin Pitch: 0.65mm
• Lead Material: Copper Alloy
• Lead Finish: Matte Tin

Pin Configuration

The 74AS00 features the following pinout configuration:

• Pin 1: A Input (Gate 1)
• Pin 2: B Input (Gate 1)
• Pin 3: Y Output (Gate 1)
• Pin 4: A Input (Gate 2)
• Pin 5: B Input (Gate 2)
• Pin 6: Y Output (Gate 2)
• Pin 7: Ground (GND)
• Pin 8: Y Output (Gate 3)
• Pin 9: B Input (Gate 3)
• Pin 10: A Input (Gate 3)
• Pin 11: Y Output (Gate 4)
• Pin 12: B Input (Gate 4)
• Pin 13: A Input (Gate 4)
• Pin 14: Supply Voltage (Vcc)

Functional Description

The 74AS00 performs the logical NAND function on each of its four independent 2-input gates. The output of each gate goes LOW only when all of its inputs are HIGH. The NAND function is one of the universal logic gates, capable of implementing any Boolean function when combined in sufficient numbers.

The device features active pull-up outputs that provide high output drive capability while maintaining fast switching speeds. The inputs are TTL-compatible, allowing direct interface with TTL logic levels. The advanced Schottky technology used in the 74AS00 provides significant improvements in speed-power product compared to standard TTL implementations.

Design Considerations

When designing with the 74AS