Overview
The 74HCT244DB,112 is an 8-bit buffer/line driver with 3-state outputs, manufactured by NXP Semiconductors. This device is part of the 74HCT series and is designed to provide reliable and efficient signal buffering and line driving capabilities. It can be used as two 4-bit buffers or one 8-bit buffer, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | 2.0 | 6.0 | V | ||
| VIH (HIGH-level input voltage) | VCC = 2.0 V | 1.5 | 1.5 | V | |
| VIH (HIGH-level input voltage) | VCC = 4.5 V | 3.15 | 3.15 | V | |
| VIH (HIGH-level input voltage) | VCC = 6.0 V | 4.2 | 4.2 | V | |
| VIL (LOW-level input voltage) | VCC = 2.0 V | -0.8 | 0.5 | 0.5 | V |
| VIL (LOW-level input voltage) | VCC = 4.5 V | -2.1 | 1.35 | 1.35 | V |
| VIL (LOW-level input voltage) | VCC = 6.0 V | -2.8 | 1.8 | 1.8 | V |
| VOH (HIGH-level output voltage) | VCC = 6.0 V; IO = 0 A | ±0.1 | V | ||
| IOZ (OFF-state output current) | VCC = 6.0 V; VO = VCC or GND | ±10 | μA | ||
| ICC (Supply current) | VCC = 6.0 V; IO = 0 A | 160 | μA | ||
| CI (Input capacitance) | 3.5 | pF | |||
| Tamb (Ambient temperature) | -40 | 125 | °C | ||
| Package | SSOP20 (SOT339-1) |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 V to 6.0 V, making it versatile for various applications.
- CMOS Low Power Dissipation: Low power consumption, which is beneficial for battery-powered devices and energy-efficient designs.
- High Noise Immunity: Ensures reliable operation in noisy environments.
- Latch-up Performance: Exceeds 100 mA per JESD 78 Class II Level B, providing robust protection against latch-up.
- Input Levels: Supports both CMOS and TTL input levels, depending on the specific device (74HC244 for CMOS, 74HCT244 for TTL).
- Octal Bus Interface: Provides an 8-bit buffer/line driver that can be used as two 4-bit buffers or one 8-bit buffer.
- Non-inverting 3-state Outputs: Outputs can be set to a high-impedance OFF-state using the output enable pins.
- ESD Protection: Offers high ESD protection (HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V).
- Multiple Package Options: Available in various packages, including SSOP20 (SOT339-1).
Applications
- Digital Circuitry: Used in a wide range of digital circuits where signal buffering and line driving are necessary.
- Embedded Systems: Suitable for use in embedded systems that require reliable and efficient signal handling.
- Industrial Automation: Can be used in industrial automation systems where robust and reliable signal transmission is critical.
- Consumer Electronics: Applicable in consumer electronics for signal buffering and line driving in various devices.
Q & A
- What is the 74HCT244DB,112 used for?
The 74HCT244DB,112 is an 8-bit buffer/line driver with 3-state outputs, used for signal buffering and line driving in digital circuits.
- What is the supply voltage range of the 74HCT244DB,112?
The device operates from 2.0 V to 6.0 V.
- What types of input levels does the 74HCT244 support?
The 74HCT244 supports TTL input levels, while the 74HC244 supports CMOS input levels.
- What is the significance of the 3-state outputs in the 74HCT244DB,112?
The 3-state outputs can be set to a high-impedance OFF-state using the output enable pins, which is useful for bus applications.
- What kind of ESD protection does the 74HCT244DB,112 offer?
The device offers high ESD protection, with HBM exceeding 2000 V and CDM exceeding 1000 V.
- In what temperature range can the 74HCT244DB,112 operate?
The device can operate in an ambient temperature range from -40°C to +125°C.
- What package options are available for the 74HCT244DB,112?
The device is available in the SSOP20 (SOT339-1) package.
- How does the 74HCT244DB,112 handle latch-up?
The device exceeds 100 mA per JESD 78 Class II Level B for latch-up performance.
- What are some common applications of the 74HCT244DB,112?
Common applications include digital circuitry, embedded systems, industrial automation, and consumer electronics.
- Where can I find detailed specifications for the 74HCT244DB,112?
Detailed specifications can be found in the datasheet available on the NXP Semiconductors website or through distributors like Digi-Key and Mouser.
