Overview
The 74HCT244PW/C1118 is an octal buffer/line driver with 3-state outputs, manufactured by NXP USA Inc. This device is part of the 74HCT series and is designed to operate with TTL (Transistor-Transistor Logic) input levels. It can be used as two 4-bit buffers or one 8-bit buffer, making it versatile for various digital logic applications. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs, allowing for high-impedance OFF-state when the output enable is set to HIGH.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | 74HCT244PW |
| VCC (V) | 4.5 - 5.5 |
| Logic Switching Levels | TTL |
| Output Drive Capability (mA) | ± 6 |
| fmax (MHz) | 36 |
| Number of Bits | 8 |
| Power Dissipation Considerations | Low |
| Tamb (°C) | -40 to +125 |
| Rth(j-a) (K/W) | 100 |
| Rth(j-c) (K/W) | 44.9 |
| Package Name | TSSOP20 (SOT360-1) |
Key Features
- Octal Buffer/Line Driver: Can be used as two 4-bit buffers or one 8-bit buffer.
- 3-State Outputs: Outputs can be set to a high-impedance OFF-state using the output enables (1OE and 2OE).
- TTL Input Levels: Compatible with TTL logic levels.
- Wide Supply Voltage Range: Operates from 4.5 V to 5.5 V.
- Low Power Dissipation: CMOS technology ensures low power consumption.
- High Noise Immunity: Latch-up performance exceeds 100 mA per JESD 78 Class II Level B.
- ESD Protection: HBM (Human Body Model) exceeds 2000 V and CDM (Charged Device Model) exceeds 1000 V.
- Multiple Package Options: Available in TSSOP20 (SOT360-1) package.
Applications
- Digital Logic Circuits: Ideal for buffering and driving signals in digital logic circuits.
- Bus Interfaces: Suitable for octal bus interfaces where signal buffering and isolation are required.
- Embedded Systems: Used in various embedded systems requiring reliable and low-power logic buffering.
- Industrial Control Systems: Can be used in industrial control systems for signal conditioning and isolation.
Q & A
- What is the primary function of the 74HCT244PW?
The primary function is to act as an octal buffer/line driver with 3-state outputs.
- What are the input logic levels for the 74HCT244PW?
The input logic levels are TTL (Transistor-Transistor Logic).
- What is the output drive capability of the 74HCT244PW?
The output drive capability is ± 6 mA.
- What is the maximum operating frequency of the 74HCT244PW?
The maximum operating frequency is 36 MHz.
- What is the temperature range for the 74HCT244PW?
The device operates from -40 °C to +125 °C.
- What type of ESD protection does the 74HCT244PW have?
The device has HBM (Human Body Model) protection exceeding 2000 V and CDM (Charged Device Model) protection exceeding 1000 V.
- What package options are available for the 74HCT244PW?
The device is available in a TSSOP20 (SOT360-1) package.
- Is the 74HCT244PW RoHS compliant?
- What are the typical applications for the 74HCT244PW?
- How do the output enables (1OE and 2OE) function on the 74HCT244PW?
