SN74HC138DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74HC138DR is a 3-line to 8-line decoder/demultiplexer IC from Texas Instruments, featuring three enable inputs, 50pF load capacitance, and HC/UH logic family. From $0.07 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC138DR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0672(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HC138DR?
- 3-line to 8-line decoding with active-low outputs for address decoding and memory expansion
- Three enable inputs (two active-low, one active-high) for easy cascading and system enable control
- HC/UH logic family with wide voltage range (2V–6V) and high noise immunity
- Low propagation delay and high-speed CMOS technology compatible with TTL input levels
- Available in 16-pin Small Outline Package (SOIC) suitable for compact PCB designs
What is SN74HC138DR used for?
The SN74HC138DR is widely used in address decoding for microprocessor and microcontroller systems, enabling efficient selection among up to eight peripheral devices or memory banks. It is also applied in data routing, demultiplexing, and digital system expansion where multiple output enables are required. Additional applications include industrial control panels, communication equipment, and consumer electronics requiring reliable logic decoding.
What are the specifications of SN74HC138DR?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | 3 ENABLE INPUTS |
| Family | HC/UH |
| 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) | 0.0052A |
| 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 | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 45ns |
| 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 | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| 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 | 8542.39.00.90 |
| Country of Origin | Malaysia, Mexico |
Where can I find the SN74HC138DR datasheet?
SN74HC138DR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HC138DR?
Compatible alternatives and drop-in replacements for SN74HC138DR:
Frequently Asked Questions
What is the SN74HC138DR and what does it do?
The SN74HC138DR is a 3-line to 8-line decoder/demultiplexer IC from Texas Instruments. It takes a 3-bit binary address input and activates one of eight active-low outputs, making it ideal for address decoding and data routing in digital systems.
What are the key electrical specifications of the SN74HC138DR?
The SN74HC138DR operates on a supply voltage range of 2V to 6V, supports a load capacitance (CL) of 50pF, and has a maximum output low current (IOL) of 5.2mA. It belongs to the HC/UH logic family and uses CMOS technology with TTL-compatible inputs.
What package does the SN74HC138DR come in?
The SN74HC138DR is housed in a 16-pin Small Outline IC (SOIC) package, also identified by the JESD-30 code R-PDSO-G16. This surface-mount package is well-suited for space-constrained PCB designs and automated assembly.
What are typical applications for the SN74HC138DR?
Typical applications include microprocessor address decoding, memory bank selection, peripheral chip-enable control, data demultiplexing, and digital logic expansion. Its three enable inputs allow easy cascading to decode larger address spaces without additional logic gates.
Is the SN74HC138DR RoHS compliant?
Yes, the SN74HC138DR is RoHS compliant (Pbfree Code: Yes) and meets the JESD-609 Code e4 standard, indicating it is manufactured with lead-free materials and is suitable for environmentally conscious designs.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
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 |
|---|---|---|
| 1+ | $0.4714 | $0.47 |
| 10+ | $0.2086 | $2.09 |
| 890+ | $0.1950 | $173.55 |
| 1006+ | $0.0996 | $100.20 |
| 3516+ | $0.0747 | $262.65 |
| 8368+ | $0.0672 | $562.33 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit