SN74AXCH1T45DCKR

SN74AXCH1T45DCKR is a one-bit, bidirectional voltage-level translator from TI’s AXCH family. It translates a single I/O line between two supply domains, VCCA and VCCB. It uses auto-direction sensing (no direction pin) and a pass-gate topology to enable seamless bidirectional data flow while preventing back-driving. It supports low-voltage operation across common logic families and provides TTL/CMOS-compatible I/O with low leakage and fast propagation. Typical uses include interfacing MCUs and peripherals across different logic levels, level-shifting I/O pins, and bridging sensors. The DCKR suffix denotes tape-and-reel packaging for automated assembly. For exact voltage ranges, pinout, timing, and power consumption, consult the TI datasheet.

Equivalent products (functionally identical) include:
- Nexperia 74AXCH1T45
- Nexperia 74AXC1T45 (same 1‑bit auto‑direction translator family)
- TI variants in other packages of the same device (same SN74AXCH1T45, different package/reel)
Note: verify voltage range, speed, and package compatibility when substituting.

Here are the key features of SN74AXCH1T45DCKR:
- 1-bit bidirectional voltage-level translator between two voltage domains
- Independent VCCA and VCCB supply rails for flexible level shifting
- Auto-direction sensing (no external direction control required)
- Suitable for translating standard CMOS/TTL logic signals
- Fast switching with low propagation delay and low static power
- I/O pins include ESD protection
- Small package footprint (DCKR) suitable for compact designs
- Industrial temperature range (typical TI device range) for robust operation
Applications: interfacing microcontrollers, memories, and peripherals across different logic levels.

- Pin count: 8 pins (DCKR package, 8-pin SOIC)
- Function: 1-bit bidirectional voltage-level translator between two supply domains (A-side and B-side) with auto-direction sensing; translates signals between A1 and B1 without a dedicated direction pin (VCCA and VCCB powers on each side).

- Manufacturer: Texas Instruments (TI)
- What kind of company: An American multinational semiconductor company based in Dallas, Texas, that designs and manufactures analog and digital integrated circuits and other semiconductor products used in a wide range of electronics.

It uses TI’s DCKR package: an 8‑pin VSSOP (Very Small Outline Package) variant.