CD74ACT138M Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The Texas Instruments CD74ACT138M is a 3-line to 8-line decoder in the Advanced CMOS ACT logic family with TTL-compatible inputs. It features three enable inputs (two active-low and one active-high) and 8 active-low outputs with 24mA sink current in a 16-pin SOIC package. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74ACT138M 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
- 3-to-8 line decoder with three independent enable inputs (two active-low, one active-high) for flexible cascading and enable control
- Advanced CMOS ACT family with TTL-compatible inputs allows direct interface to both CMOS and TTL logic systems
- Eight active-low decoded outputs with 24mA sink current capability supports direct driving of LEDs and bus logic
- 50pF load capacitance rating and high-speed ACT switching enables use in fast address decoding and memory banking circuits
Applications
The CD74ACT138M is widely used in memory address decoding, chip-select generation, and demultiplexing in microprocessor and microcontroller systems. Its three enable inputs allow easy cascading of multiple decoders to expand from 3-to-8 to larger address decoding schemes. The device is also applied in data routing, LED matrix driving, and control logic for industrial and embedded systems requiring high-speed 1-of-8 selection.
Specifications
| YTEOL | 0 |
| Additional Feature | TWO ACTIVE-LOW AND ONE ACTIVE-HIGH ENABLE INPUTS |
| Family | ACT |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | 3-LINE TO 8-LINE DECODER |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 11ns |
| Propagation Delay (tpd) | 12ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Mexico |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74ACT138M:
Frequently Asked Questions
How many enable inputs does the CD74ACT138M have?
The CD74ACT138M has three enable inputs: two active-low (E1 and E2) and one active-high (E3). All three must be in their active state simultaneously for the decoder outputs to be enabled, providing flexible cascading and gating capabilities.
What is the maximum output sink current of the CD74ACT138M?
The CD74ACT138M provides a maximum output low current (I_OL) of 24mA per output, suitable for driving logic inputs, resistive loads, and low-current LEDs directly without additional buffer stages.
What package does the CD74ACT138M use?
The CD74ACT138M is housed in a 16-pin SOIC package (JESD-30 code R-PDSO-G16), a standard surface-mount package with wide manufacturing support and good thermal performance for automated PCB assembly.
What are typical applications for the CD74ACT138M?
Typical applications include memory bank selection and chip-select generation in microprocessor systems, address decoding in embedded controllers, demultiplexing data buses, and driving LED indicator arrays in industrial and consumer electronics.
Is the CD74ACT138M compatible with TTL logic levels?
Yes, the CD74ACT138M belongs to the ACT (Advanced CMOS with TTL-compatible inputs) family, meaning its inputs are designed to accept TTL logic levels while the outputs provide full CMOS voltage swings, enabling seamless interfacing with legacy TTL systems.
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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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