Overview
The 74HC257D/AUJ, produced by NXP USA Inc., is a quad 2-input multiplexer with 3-state outputs. This integrated circuit is part of the 74HC and 74HCT family, known for their CMOS low power dissipation and high noise immunity. The device is designed to handle a wide supply voltage range from 2.0 V to 6.0 V, making it versatile for various applications. It features non-inverting data paths and 3-state outputs that can interface directly with system buses, enhancing its usability in complex digital systems.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC257D | 2.0 - 6.0 | CMOS | ± 7.8 | 11 | low | -40 ~ 125 | 92 | 9.6 | 52 | SO16 (SOT109-1) |
Key Features
- Quad 2-input multiplexer with 3-state outputs
- Inputs include clamp diodes, enabling the use of current limiting resistors
- Wide supply voltage range from 2.0 V to 6.0 V
- CMOS low power dissipation
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- Complies with JEDEC standards
- Non-inverting data path
- 3-state outputs interface directly with system bus
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2) exceeds 2000 V, CDM (ANSI/ESDA/JEDEC JS-002 class C3) exceeds 1000 V
Applications
- Seven segment displays
- Data bus control
- Decimal decoder applications
- General-purpose multiplexing and demultiplexing in digital systems
Q & A
- What is the primary function of the 74HC257D/AUJ?
The primary function of the 74HC257D/AUJ is to act as a quad 2-input multiplexer with 3-state outputs.
- What is the supply voltage range for the 74HC257D/AUJ?
The supply voltage range for the 74HC257D/AUJ is from 2.0 V to 6.0 V.
- What type of logic switching levels does the 74HC257D support?
The 74HC257D supports CMOS logic switching levels.
- What is the output drive capability of the 74HC257D/AUJ?
The output drive capability of the 74HC257D/AUJ is ± 7.8 mA.
- What is the propagation delay (tpd) of the 74HC257D/AUJ?
The propagation delay (tpd) of the 74HC257D/AUJ is approximately 11 ns.
- What are the operating temperature ranges for the 74HC257D/AUJ?
The operating temperature ranges for the 74HC257D/AUJ are from -40 °C to +125 °C.
- Does the 74HC257D/AUJ have ESD protection?
Yes, the 74HC257D/AUJ has ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2) exceeds 2000 V, CDM (ANSI/ESDA/JEDEC JS-002 class C3) exceeds 1000 V.
- What package type is the 74HC257D/AUJ available in?
The 74HC257D/AUJ is available in the SO16 (SOT109-1) package.
- What are some common applications of the 74HC257D/AUJ?
Common applications include seven segment displays, data bus control, and decimal decoder applications.
- Does the 74HC257D/AUJ comply with any industry standards?
Yes, the 74HC257D/AUJ complies with JEDEC standards.
