CD74HCT238EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The CD74HCT238EE4 is a high-speed CMOS 3-to-8 line decoder and demultiplexer from Texas Instruments in the HCT logic family. It features standard input conditioning, 50 pF load capacitance, and 4 mA output current in a 16-pin DIP package. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HCT238EE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High-speed CMOS 3-to-8 line decoder/demultiplexer with HCT logic family compatibility, enabling direct interfacing with TTL and CMOS systems
- Supports 50 pF load capacitance with 4 mA output current (IOL max), providing reliable signal drive for standard logic applications
- RoHS-compliant (JESD-609 e4) 16-pin DIP package (R-PDIP-T16) enables easy prototyping and breadboard development
Applications
The CD74HCT238EE4 is widely used in address decoding for memory and peripheral selection in microprocessor-based systems, enabling efficient expansion of I/O lines. It is also applied in data routing and demultiplexing tasks in industrial automation, communication equipment, and embedded control systems. Its HCT logic compatibility makes it ideal for mixed TTL/CMOS logic-level interfacing in legacy and modern digital designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | HCT |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | 3-LINE TO 8-LINE DECODER |
| Max I(ol) | 0.004A |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 53ns |
| Propagation Delay (tpd) | 53ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HCT238EE4:
Frequently Asked Questions
What is the logic family of the CD74HCT238EE4 and how does it affect compatibility?
The CD74HCT238EE4 belongs to the HCT high-speed CMOS logic family, which is designed to be compatible with TTL input logic levels while maintaining CMOS output levels. This makes it ideal for bridging TTL and CMOS designs without additional level-shifting components.
What is the maximum output current of the CD74HCT238EE4?
The CD74HCT238EE4 supports a maximum low-level output current (IOL) of 4 mA (0.004 A), which is sufficient to drive standard logic loads and LED indicators in typical digital circuit designs.
What package does the CD74HCT238EE4 come in?
The CD74HCT238EE4 is housed in a 16-pin Dual In-line Package (DIP), identified by JESD-30 code R-PDIP-T16. This through-hole package is convenient for prototyping on breadboards and in socketed designs, and supports a load capacitance of 50 pF.
Is the CD74HCT238EE4 RoHS compliant?
Yes, the CD74HCT238EE4 is RoHS compliant as indicated by the JESD-609 code e4 and its Pb-free designation. It is manufactured without hazardous substances including lead, making it suitable for use in environmentally compliant products and modern manufacturing processes.
What are typical applications for the CD74HCT238EE4?
Typical applications for the CD74HCT238EE4 include address decoding in microprocessor systems, data demultiplexing in communication systems, and I/O expansion in embedded designs. It enables a 3-bit binary input to select one of 8 output lines, useful in memory bank selection and peripheral enabling circuits.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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