Overview
The 74HC251D/S400118, manufactured by NXP USA Inc., is an 8-input multiplexer with 3-state output. This high-speed Si-gate CMOS device is part of the 74HC/HCT family and is pin compatible with low power Schottky TTL (LSTTL). It features eight binary inputs (I0 to I7), three select inputs (S0 to S2), and an output enable input (OE), allowing for the selection of one of the eight binary inputs to be routed to the complementary outputs (Y and Y).
This component is designed to operate over a wide supply voltage range from 2.0 V to 6.0 V, making it versatile for various applications. It is known for its low power dissipation and high noise immunity, ensuring reliable performance in different environmental conditions.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC251D | 2.0 - 6.0 | CMOS | ± 5.2 | 18 | Low | -40 ~ 125 | 80 | 4.1 | 38 | SO16 (SOT109-1) |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 V to 6.0 V.
- Low Power Dissipation: CMOS technology ensures low power consumption.
- High Noise Immunity: Provides robust performance against noise.
- ESD Protection: HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
- Latch-up Performance: Exceeds 100 mA per JESD 78 Class II Level B.
- Non-inverting Data Path: Ensures straightforward signal routing.
- Compliance with JEDEC Standards: For both CMOS and TTL input levels.
Applications
The 74HC251D/S400118 is versatile and can be used in a variety of applications across different industries, including:
- Automotive Systems: For signal routing and multiplexing in automotive electronics.
- Industrial Control Systems: To manage multiple input signals in industrial automation.
- Consumer Electronics: In devices requiring efficient signal multiplexing, such as audio and video equipment.
- Computing and Networking: For signal routing in computer peripherals and network devices.
- Medical Devices: Where reliable and low-power signal multiplexing is crucial.
Q & A
- What is the primary function of the 74HC251D/S400118?
The primary function is to act as an 8-input multiplexer with 3-state output, allowing the selection of one of eight binary inputs to be routed to the output.
- What is the supply voltage range for the 74HC251D/S400118?
The supply voltage range is from 2.0 V to 6.0 V.
- What are the logic switching levels for the 74HC251D?
The logic switching levels are CMOS for the 74HC251D and TTL for the 74HCT251.
- What is the output drive capability of the 74HC251D?
The output drive capability is ± 5.2 mA.
- What is the propagation delay (tpd) of the 74HC251D?
The propagation delay is approximately 18 ns.
- Does the 74HC251D have ESD protection?
- What is the operating temperature range for the 74HC251D?
The operating temperature range is from -40 °C to +125 °C.
- What package type is the 74HC251D available in?
The 74HC251D is available in the SO16 (SOT109-1) package.
- Is the 74HC251D latch-up immune?
- Can the 74HC251D be used in high-noise environments?
