CD54HCT126F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD54HCT126F3A is a military-grade quad bus buffer with 4 independent active-high tri-state enables from the HCT CMOS logic family. It operates from 4.5V to 5.5V supply and accepts TTL-compatible inputs in a 14-pin ceramic DIP package. From stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD54HCT126F3A 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
- Four independent active-high output enables provide flexible tri-state bus control for multi-master bus architectures
- HCT logic family accepts 5V TTL-compatible input levels with CMOS output drive for easy TTL-to-CMOS interfacing
- Military-grade ceramic 14-pin DIP package ensures high reliability in harsh environments with extended temperature range
- 6 mA output sink current with 50 pF load drive capability for standard logic bus interfacing
Applications
The CD54HCT126F3A is used in military and high-reliability avionics, industrial control, and space electronics applications where bus buffering with tri-state control is required in harsh environments. It is well-suited for data bus isolation, bidirectional bus segmentation, and I/O expansion in systems requiring TTL-to-CMOS level translation with independent enable control. The ceramic DIP package and military-grade qualification make it ideal for defense, aerospace, and ruggedized industrial systems.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE HIGH |
| Count Direction | UNIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-GDIP-T14 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.006A |
| Number of Bits | 1 |
| Number of Functions | 4 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 36ns |
| Propagation Delay (tpd) | 36ns |
| Qualification Status | Not Qualified |
| Screening Level | 38535Q/M;38534H;883B |
| 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 | 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CD54HCT126F3A and what does it do?
The CD54HCT126F3A is a quad single-input bus buffer with active-high tri-state output enables from the HCT CMOS logic family. It accepts TTL input levels and operates from 4.5V to 5.5V, providing four independently controllable buffered outputs for bus interfacing applications.
What makes the CD54HCT126F3A suitable for military applications?
The CD54HCT126F3A is manufactured in a ceramic dual-in-line package (CDIP) that provides superior moisture resistance, thermal stability, and mechanical robustness compared to plastic packages, meeting military reliability standards for operation across extreme temperature and humidity conditions.
What package and pin count does the CD54HCT126F3A use?
The CD54HCT126F3A uses a 14-pin ceramic dual-in-line package (CDIP), identified by JESD-30 code R-GDIP-T14. This through-hole package is standard for military and high-reliability applications requiring robust mechanical connections.
How does the tri-state enable work on the CD54HCT126F3A?
Each of the four buffer channels on the CD54HCT126F3A has an independent active-high output enable pin. When the enable pin is driven high, the output follows the input; when low, the output enters high-impedance (tri-state) mode, allowing bus sharing among multiple devices.
What logic family is the CD54HCT126F3A and what supply voltage does it require?
The CD54HCT126F3A belongs to the HCT (High-Speed CMOS with TTL-compatible inputs) logic family. It operates from a supply voltage of 4.5V to 5.5V, accepting TTL-level inputs and producing CMOS-level outputs compatible with standard 5V digital systems.
Related Guides
TPS61291DRVR Selection Guide: Low-Quiescent-Current Boost Converters for IoT and Wearables
How to select the TPS61291DRVR and low-Iq boost converters for IoT, wearables, and coin-cell designs. Compares specs, packages, and alternatives from TI, ADI, and Microchip.
May 13, 2026
TMS5704357BZWTQQ1 Selection Guide: Choosing the Right TMS570 Automotive MCU Variant
Compare TMS570 automotive MCU variants by ASIL level, flash, package, and peripherals. Find the right fit from entry-level LQFP to the ASIL-D TMS5704357BZWTQQ1.
May 13, 2026
TI Hercules TMS5704357BZWTQQ1 Design Guide for Automotive ASIL-D and Industrial Functional Safety
Complete integration guide for the TI Hercules TMS5704357BZWTQQ1 dual-core lockstep Cortex-R5F MCU: lockstep CPU, ECC RAM, FlexRay/CAN-FD, and ASIL-D pitfalls.
May 12, 2026
PTN78000WAH Selection Guide: Choosing the Right 1.5 A 36 V Step-Down Power Module
Compare PTN78000WAH against PTN78000WAS, PTN78060WAH, and other 1.5A 36V step-down modules. Covers package, current rating, efficiency, and drop-in replaceability.
May 12, 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
LM3911N
Dual-In-Line Packages
Integrated Circuit
CC430F5143IRGZT
Quad Flat No-Lead
Integrated Circuit
CD54HC00F
Ceramic Dual-In-Line Packages
Integrated Circuit
CD54HCT86F
Ceramic Dual-In-Line Packages
Integrated Circuit
CDCL1810RGZR
Quad Flat No-Lead
Integrated Circuit
CDC2351DBR
Small Outline Packages
Integrated Circuit
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”