# HC138 - Texas Instruments 3-to-8 Line Decoder Demultiplexer

## Product Summary

The Texas Instruments CD74HC138-Q1 is a High Speed CMOS Logic 3-to-8 Line Decoder/Demultiplexer. It operates from a 2-V to 6-V supply voltage.

## Product Information

| Field | Value |
| --- | --- |
| Part Number | HC138 |
| Manufacturer | Texas Instruments |
| Product Type | 3-to-8 Line Decoder Demultiplexer |
| Series | HC |
| Category | Uncategorized |
| Subcategory | Digital Demultiplexers & Decoders |
| Package | SOIC (D) |

## Description

The Texas Instruments CD74HC138-Q1 is a high-speed silicon-gate CMOS decoder well suited to memory address decoding or data routing applications. This circuit features low power consumption usually associated with CMOS circuitry, yet has speeds comparable to low-power Schottky TTL logic.

The device has three binary select inputs (A0, A1, and A2). If the device is enabled, these inputs determine which one of the eight normally high outputs will go low. Two active-low and one active-high enables (E1, E2, and E3) are provided to ease the cascading of decoders. The decoder's eight outputs can drive ten low-power Schottky TTL equivalent loads.

Key electrical characteristics include a typical propagation delay of 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C. It operates over a temperature range of -40 to 125°C and has a supply current of 160 µA maximum.

Packaged in a SOIC (D) with dimensions of 59.4 mm² (9.9 mm × 6 mm), this component is qualified for automotive applications.

## Key Specifications

| Specification | Value |
| --- | --- |
| Number of Channels | 1 |
| Operating Temperature Range | -40 to 125 °C |
| Propagation Delay | 13 ns |
| SVHC Present | Not Present |
| Supply Current | 160 µA |
| Supply Voltage | 2 to 6 V |

## Availability and Pricing

| Field | Value |
| --- | --- |
| Stock Status | In Stock |
| Distributor Count | 1 |
| Total Stock | 320 |
| Price | $1.27 |
| Pricing Available | Yes |

## Estimated Pricing

| Quantity | Price Range |
| ---: | ---: |
| 1+ | $1.27 |

Estimated pricing is for guidance only and is not a live distributor offer.

## Distributor Offers

| Distributor | Stock | Unit Price | MOQ | Lead Time | Last Updated |
| --- | --- | --- | --- | --- | --- |
| Chanetech | 320 |  |  |  |  |

## Features

- High Speed CMOS Logic decoder/demultiplexer.
- 3-to-8 line decoding capability.
- Operates from 2-V to 6-V supply.
- Typical propagation delay of 13 ns.
- Qualified for automotive applications.

## Applications

- Digital signal routing and decoding circuits.
- Low-power battery-operated electronic devices.
- Industrial control system interface modules.
- Automotive electronics logic level translation.
- Compact consumer appliance control boards.

## Compliance

| Field | Value |
| --- | --- |
| RoHS Status | RoHS3 Compliant |
| REACH Status | REACH Unaffected |
| Moisture Sensitivity Level | 1 Unlimited |
| SVHC Present | Not Present |

## Documents and Media

- Image: https://static.distyparts.com/disty-files/images/ba/8d/c7/d0016a.png
- Product Page: https://distyparts.com/product/hc138
- RFQ URL: https://distyparts.com/product/hc138#rfq

## FAQs

### What is the operating voltage range for the HC138?

The HC138 operates within a supply voltage range of 2 to 6 volts.

### What package type is used for the HC138?

The HC138 is housed in a compact SOIC (D) package measuring 9.9 mm by 6 mm.

### What is the operating temperature range for this component?

The HC138 functions reliably across an operating temperature range of -40 to 125 degrees Celsius.

### How fast is the signal propagation delay?

The typical propagation delay is 13 nanoseconds when tested at 5 volts with a 15 picofarad load.

### What is the maximum supply current consumption?

The maximum supply current draw is 160 microamperes.

## Related Pages

- Manufacturer: https://distyparts.com/manufacturer/texas-instruments
- Category: https://distyparts.com/category/uncategorized/new-products
- Product Page: https://distyparts.com/product/hc138
- Markdown File: https://distyparts.com/product/hc138.md
- TXT File: https://distyparts.com/product/hc138.txt