Overview
The 74LVCH244APW/AU118 is a high-performance, low-power, low-voltage CMOS device produced by NXP USA Inc. This octal buffer/line driver features 3-state outputs, making it highly versatile for various electronic applications. The device is part of the 74LVCH series and is designed to operate in mixed 3.3 V and 5 V environments, making it an excellent choice for interfacing between different voltage logic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC supply voltage | 1.2 to 3.6 | V |
| Input voltage (VI) | 0 to 5.5 | V |
| Output voltage (VO) | 0 to VCC | V |
| Operating ambient temperature (Tamb) | -40 to +125 | °C |
| Input rise and fall times (tr, tf) | Varies with VCC | ns |
| Maximum frequency (fmax) | 175 | MHz |
| Number of bits | 8 | |
| Package type | TSSOP20 | |
| ESD protection | HBM: >2000 V, CDM: >1000 V |
Key Features
- 5 V Tolerant Inputs/Outputs: Allows interfacing with 5 V logic systems while operating at lower voltages.
- Wide Supply Voltage Range: Operates from 1.2 V to 3.6 V, making it suitable for a variety of applications.
- Low Power Consumption: CMOS technology ensures low power consumption.
- 3-State Outputs: Controlled by output enable inputs (1OE and 2OE), allowing for high-impedance OFF-state.
- Schmitt-Trigger Inputs: Highly tolerant of slower input rise and fall times.
- Bus Hold on Data Inputs: Available on the 74LVCH244A, ensuring that the input state is maintained even when the input is left floating.
- IOFF Circuitry: Enables partial power-down mode operation, preventing backflow current when the device is powered down.
- ESD Protection: Exceeds 2000 V HBM and 1000 V CDM, providing robust protection against electrostatic discharge.
Applications
- Mixed Voltage Systems: Ideal for translating signals between 3.3 V and 5 V logic systems.
- Buffering and Line Driving: Used as two 4-bit buffers or one 8-bit buffer in various digital circuits.
- Partial Power-Down Applications: Suitable for systems that require power-down modes to conserve energy.
- General Digital Logic Circuits: Can be used in a wide range of digital logic applications requiring low power and high performance.
Q & A
- What is the supply voltage range of the 74LVCH244APW/AU118?
The supply voltage range is from 1.2 V to 3.6 V.
- Can the 74LVCH244APW/AU118 be used in mixed 3.3 V and 5 V environments?
Yes, it can be used to interface between 3.3 V and 5 V logic systems.
- What type of outputs does the 74LVCH244APW/AU118 have?
The device has 3-state outputs controlled by output enable inputs (1OE and 2OE).
- What is the maximum operating frequency of the 74LVCH244APW/AU118?
The maximum frequency is 175 MHz.
- Does the 74LVCH244APW/AU118 have ESD protection?
Yes, it exceeds 2000 V HBM and 1000 V CDM for ESD protection.
- What is the package type of the 74LVCH244APW/AU118?
The package type is TSSOP20.
- Is the 74LVCH244APW/AU118 suitable for partial power-down applications?
Yes, it features IOFF circuitry for partial power-down mode operation.
- What is the operating temperature range of the 74LVCH244APW/AU118?
The operating temperature range is from -40 °C to +125 °C.
- Does the 74LVCH244APW/AU118 have bus hold on data inputs?
Yes, the 74LVCH244A version has bus hold on all data inputs).
- What is the significance of Schmitt-trigger inputs in the 74LVCH244APW/AU118?
Schmitt-trigger inputs make the circuit highly tolerant of slower input rise and fall times).
