CD74HC238EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HC238EE4 is a 3-to-8 line decoder from Texas Instruments in the HC CMOS family, expanding 3 binary address inputs to 8 active-high outputs. It supports 50 pF load capacitance, 4 mA output low current, and comes in a through-hole 16-pin DIP package for breadboard and legacy PCB assembly.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC238EE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4621(MOQ 322)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC238EE4?
- 3-to-8 line decoder with 8 active-high outputs for fully decoded address or channel selection
- HC CMOS family with 50 pF load capacitance and 4 mA sink current across 2 V to 6 V supply
- 16-pin DIP through-hole package compatible with breadboards and legacy PTH PCB designs
- RoHS-compliant e4 JEDEC finish supporting lead-free manufacturing and global environmental standards
What is CD74HC238EE4 used for?
The CD74HC238EE4 is widely used in memory address decoding, port expansion, and multiplexed I/O systems where 3 microcontroller GPIO pins must independently select one of 8 peripheral devices such as sensors, relays, or LED drivers. Its HC-family CMOS outputs with active-high assertion and 4 mA drive strength allow direct connection to common 3.3 V and 5 V logic loads without additional buffering. The 16-pin DIP form factor makes it a standard choice in prototyping environments, educational labs, and repair-friendly industrial equipment.
What are the specifications of CD74HC238EE4?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | HC/UH |
| 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 Bits | 8 |
| 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 | 30ns |
| Propagation Delay (tpd) | 225ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| 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 |
| Country of Origin | Malaysia, Mexico |
Where can I find the CD74HC238EE4 datasheet?
CD74HC238EE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC238EE4?
Compatible alternatives and drop-in replacements for CD74HC238EE4:
Frequently Asked Questions
How does the CD74HC238EE4 expand a microcontroller's I/O capacity when selecting 8 peripherals?
The CD74HC238EE4 decodes 3 binary address inputs into 8 individual active-high select outputs, allowing a microcontroller to individually address 8 peripherals while consuming only 3 GPIO pins. Operating at 2 V to 6 V supply with 4 mA output sink current, it directly drives CMOS and TTL-compatible chip-select inputs without additional buffer stages.
What is the output drive capability of CD74HC238EE4 and at which load capacitance is it characterized?
The CD74HC238EE4 is characterized at a 50 pF load capacitance and provides up to 4 mA output low current per output pin. This specification matches the load conditions typical of short PCB traces driving CMOS logic inputs, ensuring propagation delays remain within the HC-family typical range of 10 ns to 20 ns at 5 V supply.
What package does the CD74HC238EE4 use, and when should it be preferred over an SOIC variant?
The CD74HC238EE4 uses a 16-pin DIP through-hole package, which is preferred when prototyping on solderless breadboards, when working in educational or lab environments requiring easy component swaps, or when replacing legacy through-hole assemblies. The 2.54 mm pin pitch of the DIP package also provides better mechanical robustness than SOIC for high-vibration industrial applications.
Can the CD74HC238EE4 be used as an 8-channel multiplexer control decoder in a relay board design?
Yes, the CD74HC238EE4 is directly suitable as a relay board decoder: each of its 8 active-high outputs can drive a transistor or ULN2003 relay driver input, with the 3-bit address selecting one of 8 relay channels at a time. At 5 V supply, the 4 mA output current reliably turns on an NPN base or a Darlington input, covering relay coil currents from 50 mA to 500 mA when buffered appropriately.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 322+ | $0.9300 | $299.46 |
| 1000+ | $0.6186 | $618.60 |
| 10000+ | $0.5515 | $5515.00 |
| 100000+ | $0.4621 | $46210.00 |
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