Overview
The CD74HC4049M is a high-speed CMOS logic hex buffer with non-inverting outputs, manufactured by Texas Instruments. This device is part of the HC series, known for its high-speed silicon gate technology and modified input protection structure. It is designed to operate as a logic level translator, converting high-level logic signals to low-level logic signals while operating off the low-level logic supply. This makes it versatile for use in various digital circuits, including simple buffers or inverters without level translation. The CD74HC4049M is available in a 16-lead SOIC package and is suitable for a wide range of temperatures from –55°C to 125°C.
Key Specifications
| Parameter | Symbol | Test Conditions | Units | Min | Max | |
|---|---|---|---|---|---|---|
| Temperature Range (TA) | - | - | °C | -55 | - | 125 |
| Supply Voltage Range, VCC | VCC | - | V | 2 | - | 6 |
| DC Input Voltage, VI | VI | - | V | 0 | - | 15 |
| DC Output Voltage, VO | VO | - | V | 0 | - | VCC |
| Propagation Delay, nA to nY | tPLH, tPHL | CL = 50pF, VCC = 2V | ns | 85 | - | 130 |
| Propagation Delay, nA to nY | tPLH, tPHL | CL = 50pF, VCC = 4.5V | ns | 17 | - | 26 |
| Propagation Delay, nA to nY | tPLH, tPHL | CL = 50pF, VCC = 6V | ns | 14 | - | 22 |
| Input Capacitance | CI | - | pF | - | - | 10 |
| Quiescent Device Current | ICC | VCC or GND, VCC = 6V | µA | 2 | - | 20 |
Key Features
- High-Speed Silicon Gate Technology: Fabricated with high-speed silicon gate technology, ensuring fast switching times.
- Modified Input Protection Structure: Enables the device to be used as logic level translators, converting high-level logic signals to low-level logic signals.
- Wide Operating Temperature Range: Operates from –55°C to 125°C, making it suitable for a variety of environmental conditions.
- Multiple Package Options: Available in SOIC, PDIP, SOP, and TSSOP packages to fit different design requirements.
- Low Power Consumption: Quiescent device current is low, typically 2 µA at VCC = 6V.
- Electrostatic Discharge Protection: The modified input protection structure protects the input from negative electrostatic discharge.
Applications
- Logic Level Translation: Ideal for converting high-level logic signals to low-level logic signals in mixed-voltage systems.
- Buffer and Inverter Circuits: Can be used as simple buffers or inverters without level translation.
- Digital Signal Processing: Suitable for use in digital signal processing circuits where high-speed and low power consumption are critical.
- Embedded Systems: Used in various embedded systems requiring high-speed logic operations.
- Industrial Control Systems: Applicable in industrial control systems that require reliable and fast logic operations over a wide temperature range.
Q & A
- What is the primary function of the CD74HC4049M?
The primary function of the CD74HC4049M is to act as a high-speed CMOS logic hex buffer with non-inverting outputs, and it can also be used for logic level translation and as simple buffers or inverters.
- What is the operating temperature range of the CD74HC4049M?
The operating temperature range is from –55°C to 125°C.
- What are the available package options for the CD74HC4049M?
The device is available in SOIC, PDIP, SOP, and TSSOP packages.
- What is the supply voltage range for the CD74HC4049M?
The supply voltage range is from 2V to 6V.
- What is the typical propagation delay for the CD74HC4049M at VCC = 4.5V?
The typical propagation delay at VCC = 4.5V is between 17ns and 26ns for CL = 50pF.
- How does the CD74HC4049M protect against electrostatic discharge?
The device has a modified input protection structure that protects the input from negative electrostatic discharge.
- What is the quiescent device current for the CD74HC4049M at VCC = 6V?
The quiescent device current is typically 2 µA at VCC = 6V.
- Can the CD74HC4049M be used in mixed-voltage systems?
Yes, it is ideal for converting high-level logic signals to low-level logic signals in mixed-voltage systems.
- What are some common applications of the CD74HC4049M?
Common applications include logic level translation, buffer and inverter circuits, digital signal processing, embedded systems, and industrial control systems.
- Is the CD74HC4049M still recommended for new designs?
No, the device is not recommended for new designs as it has been announced for discontinuation by Texas Instruments.
