Overview
The CD74AC283M96 is a 4-bit binary adder with fast carry, produced by Texas Instruments. This device utilizes Advanced CMOS Logic technology and is designed to add two 4-bit binary numbers, generating a carryout bit if the sum exceeds 15. The symmetry of the add function allows it to be used with either all active-HIGH operands (positive logic) or all active-LOW operands (negative logic). This component is part of the CD74AC283 and CD74ACT283 series, which are known for their high speed and low power consumption.
Key Specifications
| Parameter | Symbol | Test Conditions | Unit | Min | Typ | Max |
|---|---|---|---|---|---|---|
| High Level Input Voltage | VIH | VCC = 1.5V to 5.5V | V | 1.2 | - | 1.5 |
| Low Level Input Voltage | VIL | VCC = 1.5V to 5.5V | V | 0.3 | - | 0.9 |
| High Level Output Voltage | VOH | VCC = 1.5V to 5.5V, IO = -50mA | V | 1.4 | - | 3.85 |
| Low Level Output Voltage | VOL | VCC = 1.5V to 5.5V, IO = 50mA | V | 0.1 | - | 0.5 |
| Input Leakage Current | II | VCC or GND | μA | ±0.1 | - | ±1 |
| Quiescent Supply Current | ICC | VCC = 5.5V | μA | 8 | - | 160 |
| Propagation Delay, An or Bn to COUT | tPLH, tPHL | VCC = 1.5V to 5.5V, CL = 50pF | ns | 199 | - | 228 |
Key Features
- Buffered inputs
- Exceeds 2kV ESD protection (MIL-STD-883, method 3015)
- SCR-latchup-resistant CMOS process and circuit design
- Speed of bipolar FAST™/AS/S with significantly reduced power consumption
- Balanced propagation delays
- AC types feature 1.5V to 5.5V operation and balanced noise immunity at 30% of the supply
- ±24mA output drive current, capable of driving 50Ω transmission lines and fanout to 15 FAST™ ICs
Applications
The CD74AC283M96 is suitable for a variety of digital logic applications, including arithmetic circuits, digital signal processing, and other systems requiring fast and reliable binary addition. It can be used in both positive and negative logic systems, making it versatile for different design requirements.
Specific applications include:
- Arithmetic logic units (ALUs)
- Digital calculators and computers
- Embedded systems requiring fast binary arithmetic
- Digital signal processing circuits
Q & A
- What is the primary function of the CD74AC283M96?
The CD74AC283M96 is a 4-bit binary adder with fast carry, designed to add two 4-bit binary numbers and generate a carryout bit if the sum exceeds 15.
- What technology does the CD74AC283M96 use?
The CD74AC283M96 utilizes Advanced CMOS Logic technology.
- What is the input voltage range for the CD74AC283M96?
The input voltage range is from 1.5V to 5.5V.
- What is the maximum output drive current of the CD74AC283M96?
The maximum output drive current is ±24mA.
- Is the CD74AC283M96 ESD protected?
Yes, it exceeds 2kV ESD protection (MIL-STD-883, method 3015).
- What are the recommended power supply conditions?
The power supply can be any voltage between the minimum and maximum supply voltage rating, with a recommended bypass capacitor of 0.1μF.
- How should the bypass capacitor be placed in the layout?
The bypass capacitor should be placed near the positive supply terminal of the device, with an electrically short ground return path.
- What are the propagation delay times for the CD74AC283M96?
The propagation delay times range from 199ns to 228ns for VCC = 1.5V to 5.5V and CL = 50pF.
- Can the CD74AC283M96 be used in both positive and negative logic systems?
Yes, due to the symmetry of the add function, it can be used with either all active-HIGH or all active-LOW operands.
- What is the thermal resistance of the SOIC package?
The junction-to-ambient thermal resistance (RθJA) for the SOIC package is 73°C/W.
