CD54AC138F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD54AC138F3A is a single 3-to-8 line decoder/demultiplexer from the AC CMOS logic family in a 16-pin ceramic DIP package. It features active-low outputs with three enable inputs and operates across a standard 2 V to 6 V supply range. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD54AC138F3A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $10.1800(MOQ 19)
- 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 CD54AC138F3A?
- 3-to-8 line decoding with active-low outputs and 3 enable inputs for easy bus enable and cascading to larger decoders
- AC CMOS family for high-speed operation with reduced power consumption compared to older TTL or HCT logic families
- 16-pin ceramic DIP (CDIP) package offering superior reliability and temperature performance for military and industrial applications
What is CD54AC138F3A used for?
The CD54AC138F3A is used in address decoding for memory banks, I/O port selection in bus-based microprocessor systems, and enable logic for multi-chip digital boards. Its active-low enable structure makes it straightforward to cascade two devices to build a 4-to-16 decoder with no additional glue logic. The ceramic DIP package suits aerospace, military, and high-reliability industrial applications that demand extended temperature ranges and long-term component stability.
What are the specifications of CD54AC138F3A?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | LG_MAX |
| Family | AC |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Logic IC Type | 3-LINE TO 8-LINE DECODER |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Characteristics | 3-STATE |
| Package Body Material | CERAMIC, GLASS-SEALED |
| 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 | 11ns |
| Propagation Delay (tpd) | 138ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD54AC138F3A datasheet?
CD54AC138F3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54AC138F3A?
Compatible alternatives and drop-in replacements for CD54AC138F3A:
Frequently Asked Questions
How many output lines does the CD54AC138F3A drive and what logic level do they assert when active?
The CD54AC138F3A decodes 3 binary address inputs into 8 mutually exclusive active-low output lines. Only the selected output goes LOW while all other 7 outputs remain HIGH, making it directly compatible with chip-select inputs on memory ICs, latches, and peripheral decoders in 5 V or 3.3 V systems.
Can two CD54AC138F3A devices be cascaded to decode 4 address lines into 16 outputs?
Yes. By connecting the enable inputs of two CD54AC138F3A devices to the fourth address bit (one active-high, one active-low), a 4-to-16 decoder is formed with 16 active-low outputs and no additional logic ICs. Each device handles 8 of the 16 outputs, and only one device is enabled at any given address state.
Why is the ceramic DIP package of the CD54AC138F3A preferred for high-reliability or military designs over plastic packages?
The ceramic DIP (CDIP) package provides hermetic sealing, which prevents moisture ingress and corrosion over decades of service. It also handles temperature extremes from -55°C to +125°C, meeting MIL-STD reliability requirements. Plastic DIP packages absorb moisture and are rated for narrower ranges, so CDIP is specified for avionics, space, and long-life industrial controllers.
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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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