Overview
The CD74HC7266M is a high-speed CMOS logic integrated circuit produced by Texas Instruments. This device contains four independent 2-input Exclusive NOR (XNOR) gates, each performing the Boolean function Y = A ⊕ B in positive logic. It is part of the HC series, known for its wide operating voltage range and significant power reduction compared to LSTTL logic ICs. Although the CD74HC7266M is currently obsolete and not recommended for new designs, it remains a valuable component for existing systems and educational purposes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC (D) | - |
| Pins | 14 | - |
| Operating Temperature Range | -55 to 125 | °C |
| Operating Voltage Range | 2 to 6 | V |
| Propagation Delay (A or B to Y) | 23 to 35 ns (at VCC = 4.5 V, CL = 50 pF) | ns |
| Transition Time (Y) | 15 to 19 ns (at VCC = 4.5 V, CL = 50 pF) | ns |
| Input Leakage Current | ±0.1 µA (at VCC = 6 V) | µA |
| Supply Current | 2 to 40 µA (at VCC = 6 V) | µA |
| Continuous Output Current | ±25 mA | mA |
| Continuous Current through VCC or GND | ±50 mA | mA |
Key Features
- Buffered Inputs and Outputs: Ensures stable and reliable signal transmission.
- Wide Operating Voltage Range: Operates from 2 V to 6 V, making it versatile for various applications.
- Wide Operating Temperature Range: Functions from -55°C to +125°C, suitable for harsh environments.
- High Fanout Capability: Supports up to 10 LSTTL loads, enhancing its utility in complex circuits.
- Significant Power Reduction: Compared to LSTTL logic ICs, it offers lower power consumption.
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V, ensuring robust performance in noisy environments.
- Balanced Propagation Delay and Transition Times: Ensures consistent and predictable signal timing.
Applications
- Detect Phase Differences in Input Signals: Useful in timing and synchronization circuits.
- Logical Comparators: Can be used to compare two digital signals.
- Parity Generators and Checkers: Essential in data integrity and error detection systems.
- Adders/Subtracters: Can be part of arithmetic logic units (ALUs) in digital circuits.
- Selectable Inverter / Buffer: Provides flexibility in signal processing and conditioning.
Q & A
- What is the CD74HC7266M?
The CD74HC7266M is a high-speed CMOS logic integrated circuit containing four independent 2-input Exclusive NOR (XNOR) gates.
- What is the operating voltage range of the CD74HC7266M?
The operating voltage range is from 2 V to 6 V.
- What is the operating temperature range of the CD74HC7266M?
The operating temperature range is from -55°C to +125°C.
- How many LSTTL loads can the CD74HC7266M support?
It can support up to 10 LSTTL loads.
- What are the key features of the CD74HC7266M?
Key features include buffered inputs and outputs, wide operating voltage and temperature ranges, high fanout capability, significant power reduction, and high noise immunity.
- What are some common applications of the CD74HC7266M?
Common applications include detecting phase differences in input signals, logical comparators, parity generators and checkers, adders/subtracters, and selectable inverter/buffer circuits.
- Is the CD74HC7266M still in production?
No, the CD74HC7266M is obsolete and not recommended for new designs.
- What is the propagation delay of the CD74HC7266M?
The propagation delay is typically between 23 to 35 ns at VCC = 4.5 V and CL = 50 pF.
- What is the transition time of the CD74HC7266M?
The transition time is typically between 15 to 19 ns at VCC = 4.5 V and CL = 50 pF.
- How much current can the CD74HC7266M continuously output?
The continuous output current is ±25 mA.
