Overview
The 74HC138BQ,115 is a 3-to-8 line decoder/demultiplexer produced by Nexperia USA Inc. This integrated circuit is part of the 74HC and 74HCT series, known for their high performance and versatility in digital logic applications. The device decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive outputs (Y0 to Y7), making it ideal for various decoding and demultiplexing tasks. It features three enable inputs (E1, E2, and E3) that allow for easy parallel expansion and multiple input enable functions.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Type Number | 74HC138BQ | Part number of the component |
| Package | DHVQFN16 (SOT763-1) | Package type and footprint |
| VCC (V) | 2.0 - 6.0 | Supply voltage range |
| Logic Switching Levels | CMOS | Logic level compatibility |
| Output Drive Capability (mA) | ± 5.2 | Maximum output current |
| tpd (ns) | 12 | Propagation delay time |
| Power Dissipation Considerations | Low power dissipation | Power consumption characteristics |
| Tamb (°C) | -40 to +125 | Operating temperature range |
| Rth(j-a) (K/W) | 93 | Junction-to-ambient thermal resistance |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 to 6.0 V, making it versatile for various applications.
- CMOS Low Power Dissipation: Low power consumption, suitable for energy-efficient designs.
- High Noise Immunity: Robust against noise, ensuring reliable operation in noisy environments.
- Latch-up Performance: Exceeds 100 mA per JESD 78 Class II Level B, ensuring high reliability.
- Demultiplexing Capability: Can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- Multiple Input Enable: Allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '138 ICs and one inverter.
- ESD Protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115-A exceeds 200 V.
- Input Levels: CMOS level for 74HC138, TTL level for 74HCT138.
- Compliance with JEDEC Standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
Applications
- Memory Chip Select Decoding: Ideal for selecting memory chips in digital systems.
- Demultiplexing: Can be used to demultiplex data signals, making it useful in communication and data transmission systems.
- Automotive Electronics: Qualified to AEC-Q100/Q101 standards, making it suitable for automotive applications.
- Industrial Control Systems: Used in various industrial control and automation systems due to its reliability and noise immunity.
- Consumer Electronics: Found in consumer devices such as digital appliances and gadgets.
Q & A
- What is the primary function of the 74HC138BQ,115?
The primary function is to decode three binary weighted address inputs to eight mutually exclusive outputs, and it can also be used as a demultiplexer.
- What is the supply voltage range for the 74HC138BQ,115?
The supply voltage range is from 2.0 to 6.0 V.
- What are the logic switching levels for the 74HC138BQ,115?
The logic switching levels are CMOS for the 74HC138 and TTL for the 74HCT138.
- How many enable inputs does the 74HC138BQ,115 have?
The device has three enable inputs (E1, E2, and E3).
- Can the 74HC138BQ,115 be used for demultiplexing?
Yes, it can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- What is the operating temperature range for the 74HC138BQ,115?
The operating temperature range is from -40°C to +125°C.
- Does the 74HC138BQ,115 have ESD protection?
Yes, it has ESD protection with HBM JESD22-A114F exceeding 2000 V and MM JESD22-A115-A exceeding 200 V.
- What are the typical applications of the 74HC138BQ,115?
It is used in memory chip select decoding, demultiplexing, automotive electronics, industrial control systems, and consumer electronics.
- What package types are available for the 74HC138BQ,115?
The device is available in DHVQFN16 (SOT763-1) package.
- Is the 74HC138BQ,115 compliant with any specific standards?
Yes, it complies with JEDEC standards JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
