Overview
The 74HC257D,652, produced by Nexperia USA Inc., is a quad 2-input multiplexer with 3-state outputs. This integrated circuit is part of the 74HC series, known for its CMOS low power dissipation and high noise immunity. The device is designed to operate within a wide supply voltage range from 2.0 V to 6.0 V, making it versatile for various electronic designs. The 74HC257D features inputs with clamp diodes, enabling the use of current limiting resistors to interface inputs to voltages in excess of VCC. This component is widely used in applications requiring signal switching and multiplexing.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|---|---|
| 74HC257D | 2.0 - 6.0 | CMOS | ± 7.8 | 11 | Low | -40 ~ 125 | SO16 (SOT109-1) |
Key Features
- Quad 2-input multiplexer with 3-state outputs: Allows for multiple input signals to be selectively routed to a single output line.
- Wide supply voltage range (2.0 V to 6.0 V): Enhances compatibility with various system voltages.
- CMOS low power dissipation: Minimizes power consumption, making it suitable for energy-efficient designs.
- High noise immunity: Ensures reliable operation in noisy environments.
- Inputs with clamp diodes: Enables the use of current limiting resistors to protect against voltage spikes.
- 3-state outputs interface directly with system bus: Simplifies integration into larger systems.
- Complies with JEDEC standards and JESD 78 Class II Level B latch-up performance: Ensures high reliability and compliance with industry standards.
Applications
The 74HC257D is versatile and finds applications across various industries, including:
- Automotive: Used in automotive systems for signal switching and multiplexing.
- Industrial: Employed in industrial control systems and automation.
- Consumer Electronics: Used in consumer devices requiring signal routing and multiplexing.
- Computing and Mobile Devices: Utilized in computing and mobile devices for efficient signal management.
- Wearables and IoT Devices: Suitable for wearables and IoT devices due to its low power consumption and compact package.
Q & A
- What is the primary function of the 74HC257D?
The primary function of the 74HC257D is to act as a quad 2-input multiplexer with 3-state outputs, allowing multiple input signals to be selectively routed to a single output line.
- What is the supply voltage range for the 74HC257D?
The supply voltage range for the 74HC257D 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?
The output drive capability of the 74HC257D is ± 7.8 mA.
- What is the typical propagation delay (tpd) of the 74HC257D?
The typical propagation delay (tpd) of the 74HC257D is 11 ns.
- What are the operating temperature limits for the 74HC257D?
The operating temperature limits for the 74HC257D are from -40°C to 125°C.
- What package type is the 74HC257D available in?
The 74HC257D is available in a 16-pin SOIC (SOT109-1) package.
- Is the 74HC257D RoHS compliant?
Yes, the 74HC257D is RoHS compliant.
- What industries can the 74HC257D be used in?
The 74HC257D can be used in automotive, industrial, consumer electronics, computing, mobile devices, and wearables.
- Does the 74HC257D have any special handling requirements during soldering?
No specific special handling is required during soldering, but it must adhere to standard reflow and wave soldering procedures.
