SN74AHC1G126DCKRIn StockTexas Instruments
SN74AHC1G126DCKR is a single-gate AHC bus buffer with tri-state output and active-high enable control. Features 11.5ns propagation delay at 3.3V, 8mA output drive, and 2V to 5.5V wide supply range. From $0.028 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- SN74AHC1G126DCKR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0280(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Single-gate AHC bus buffer with tri-state output for flexible bus isolation and signal buffering
- Active-high output enable (OE) control for easy interface with microcontrollers and FPGAs
- 11.5ns propagation delay at 3.3V with 8mA output drive strength for high-speed applications
- Wide supply voltage range: 2V to 5.5V, compatible with both 3.3V and 5V logic systems
- Ultra-compact SC-70 5-pin package (SOT23) ideal for space-constrained PCB designs
Applications
The SN74AHC1G126DCKR is widely used in microcontroller and FPGA designs for bus buffering, signal isolation, and direction control on shared data lines. Its tri-state output makes it ideal for I2C/SPI bus expansion, level interface applications, and enabling/disabling signal paths in portable electronics and IoT devices. The compact SC-70 package and low-voltage operation suit battery-powered wearables, handheld instruments, and high-density PCB designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE HIGH |
| Count Direction | UNIDIRECTIONAL |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| Number of Bits | 1 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP5/6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.01mA |
| Prop. Delay@Nom-Sup | 8.5ns |
| Propagation Delay (tpd) | 13ns |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100 |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHC1G126DCKR:
Bus Driver, AHC/VHC/H/U/V Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Frequently Asked Questions
What is the SN74AHC1G126DCKR and what does it do?
The SN74AHC1G126DCKR is a single-gate AHC family bus buffer with tri-state output from Texas Instruments. It passes the input signal to the output when the active-high output enable (OE) pin is HIGH, and places the output in a high-impedance state when OE is LOW. It operates from 2V to 5.5V supply voltage with 11.5ns propagation delay at 3.3V and 8mA output drive current, making it suitable for bus isolation and signal buffering in digital systems.
What package and pin count does the SN74AHC1G126DCKR use?
The SN74AHC1G126DCKR comes in a 5-pin SC-70 package (also referred to as SOT23-5), which is an ultra-compact surface-mount package measuring approximately 2.0mm x 1.25mm. This small footprint makes it ideal for space-constrained designs such as wearables, portable electronics, and high-density PCBs. The 'R' suffix in the part number denotes tape-and-reel packaging for automated SMT assembly.
What are common applications for the SN74AHC1G126DCKR?
The SN74AHC1G126DCKR is commonly used for bus buffering and signal isolation in microcontroller and FPGA designs, I2C/SPI bus expansion, enable/disable control of signal paths, and level interface applications where a tri-state buffer is needed. Its 2V to 5.5V operating range makes it compatible with both 3.3V and 5V logic families, and the SC-70 package suits IoT, wearable, and battery-powered portable devices.
What are suitable replacements or alternatives for the SN74AHC1G126DCKR?
Compatible alternatives include the SN74LVC1G126DCKR (LVC family, 1.65V to 5.5V operation), SN74AHCT1G126DCKR (AHCT family, TTL-compatible input thresholds), and 74AHC1G126 from other manufacturers such as Nexperia or ON Semiconductor in equivalent SC-70/SOT353 packages. When selecting a replacement, verify supply voltage range, propagation delay, output drive strength, and package compatibility to ensure drop-in interchangeability.
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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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