Overview
The 74HCT253D, produced by Nexperia (formerly part of NXP Semiconductors), is a dual 4-bit multiplexer. This component is part of the 74HCT series, which is known for its compatibility with TTL (Transistor-Transistor Logic) input levels. The 74HCT253D features two independent 4-bit multiplexers, each with four binary inputs (nI0 to nI3), an output enable input (nOE), and shared select inputs (S0 and S1). This configuration allows for the selection of one of the four binary inputs to be routed to the output nY, based on the state of the select inputs. A HIGH on the nOE input causes the outputs to enter a high-impedance OFF-state, making it suitable for direct interface with system buses.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HCT253D | 4.5 - 5.5 | TTL | ± 6 | 17 | low | -40 ~ 125 | 78 | 3.2 | 36 | SO16 |
Key Features
- Non-inverting data path: Ensures that the output signal is the same as the selected input signal.
- 3-state outputs: Outputs can be set to a high-impedance state, allowing direct interface with system buses.
- Common select inputs: Shared select inputs (S0 and S1) for both multiplexers.
- Separate output enable inputs: Each multiplexer has its own output enable input (nOE).
- Wide supply voltage range: Operates from 2.0 V to 6.0 V.
- CMOS low power dissipation: Low power consumption, especially in CMOS logic levels.
- High noise immunity: Robust against noise and interference.
- Latch-up performance: Exceeds 100 mA per JESD 78 Class II Level B.
- ESD protection: HBM (Human Body Model) exceeds 2000 V, CDM (Charged Device Model) exceeds 1000 V.
- Multiple package options: Available in various packages, including SO16.
Applications
- Data selectors: Used in applications where data needs to be selected from multiple sources.
- Data multiplexers: Suitable for multiplexing data in digital systems.
Q & A
- What is the primary function of the 74HCT253D?
The primary function of the 74HCT253D is to act as a dual 4-bit multiplexer, selecting one of four binary inputs to be routed to the output based on the select inputs.
- What are the logic switching levels for the 74HCT253D?
The 74HCT253D operates with TTL (Transistor-Transistor Logic) input levels.
- What is the output drive capability of the 74HCT253D?
The output drive capability is ±6 mA.
- What is the typical propagation delay (tpd) of the 74HCT253D?
The typical propagation delay is 17 ns.
- What is the operating temperature range for the 74HCT253D?
The component operates from -40 °C to +125 °C.
- Does the 74HCT253D have ESD protection?
Yes, it has ESD protection with HBM exceeding 2000 V and CDM exceeding 1000 V.
- What package options are available for the 74HCT253D?
It is available in various packages, including SO16 (Small Outline 16 leads).
- Is the 74HCT253D RoHS compliant?
Yes, the 74HCT253D is RoHS compliant.
- What are some common applications of the 74HCT253D?
Common applications include data selectors and data multiplexers in digital systems.
- Does the 74HCT253D have high noise immunity?
Yes, it has high noise immunity, making it robust against interference.
