Overview
The CD74HC154ENG4 is a 4-to-16 line decoder/demultiplexer integrated circuit produced by Texas Instruments. This device is part of the HC (High-Speed CMOS Logic) family and is designed to perform both decoding and demultiplexing functions. It features two enable inputs, E1 and E2, which control the output states. A high on either enable input forces the output into the high state. The device uses four input lines (A0 to A3) to select one of the 16 output lines (Y0 to Y15), making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Symbol | Test Conditions | Min | Max | Units | |
|---|---|---|---|---|---|---|
| DC Supply Voltage | VCC | -0.5 | 7 | V | ||
| Input Leakage Current | II | VCC or GND | ±1 | µA | ||
| Quiescent Device Current | ICC | VCC or GND | 0 | 160 | µA | |
| Propagation Delay (HC Types) | tPLH, tPHL | CL = 50pF | 35 | 265 | ns | |
| High Level Output Voltage (CMOS Loads) | VOH | VCC = 4.5V | 4.4 | V | ||
| Low Level Output Voltage (CMOS Loads) | VOL | VCC = 4.5V | 0.1 | V | ||
| Operating Temperature Range | -55 | 125 | °C |
Key Features
- CMOS Input Compatibility: The device is compatible with CMOS input levels, ensuring low input leakage current (≤1µA at VOL, VOH).
- Decoding and Demultiplexing: It can perform both decoding and demultiplexing functions using four input lines (A0 to A3) to select one of the 16 output lines (Y0 to Y15).
- Dual Enable Inputs: Features two enable inputs, E1 and E2, which can force the output into the high state when either is high.
- High-Speed Operation: Offers fast propagation delays, making it suitable for high-speed digital applications.
- Wide Operating Temperature Range: Operates over a temperature range of -55°C to 125°C.
- Multiple Package Options: Available in various packages including PDIP, SOIC, and CERDIP.
Applications
- Digital Circuit Design: Ideal for use in digital circuit designs where decoding and demultiplexing are required.
- Microprocessor Systems: Can be used in microprocessor systems to manage data lines and address decoding.
- Communication Systems: Suitable for communication systems that require data routing and selection.
- Embedded Systems: Useful in embedded systems for managing input/output operations.
Q & A
- What is the primary function of the CD74HC154ENG4?
The primary function of the CD74HC154ENG4 is to perform as a 4-to-16 line decoder/demultiplexer.
- What are the enable inputs used for in the CD74HC154ENG4?
The enable inputs (E1 and E2) control the output states. A high on either enable input forces the output into the high state.
- What is the operating temperature range of the CD74HC154ENG4?
The operating temperature range is -55°C to 125°C.
- What are the different package options available for the CD74HC154ENG4?
The device is available in PDIP, SOIC, and CERDIP packages.
- What is the typical propagation delay for the CD74HC154ENG4?
The typical propagation delay is around 35-265 ns depending on the load capacitance.
- Is the CD74HC154ENG4 RoHS compliant?
Yes, the CD74HC154ENG4 is RoHS compliant.
- What is the maximum DC supply voltage for the CD74HC154ENG4?
The maximum DC supply voltage is 7V.
- How many input lines does the CD74HC154ENG4 use for decoding?
The device uses four input lines (A0 to A3) for decoding.
- What is the quiescent device current for the CD74HC154ENG4?
The quiescent device current is up to 160 µA.
- Is the CD74HC154ENG4 sensitive to electrostatic discharge?
Yes, the device is sensitive to electrostatic discharge, and proper IC handling procedures should be followed.
