Texas Instruments SN74AHC1G09DCKR

Overview

SN74AHC1G09 from Texas Instruments is a single 2-input positive-AND gate with open-drain output, performing Y = A × B logic in CMOS technology. It operates from 2 V to 5.5 V, delivers ≤6 ns propagation delay at 5 V, sinks up to ±8 mA, and supports industrial temperature range (–55°C to +125°C). It is used in power-good signal combining and digital enable control circuits.

For engineers reviewing the SN74AHC1G09 datasheet, SN74AHC1G09 pinout, SN74AHC1G09 application, or SN74AHC1G09 equivalent, key selection considerations include open-drain output compatibility with wired-AND bus topologies, voltage-level translation capability across 2–5.5 V rails, input overvoltage tolerance, Schmitt-trigger input noise immunity, and SC70-5 package footprint constraints.

Technical Context

The SN74AHC1G09 implements a single Boolean AND function with true (non-inverted) logic output polarity and open-drain termination - requiring an external pull-up resistor for high-level assertion. Its inputs feature Schmitt-trigger thresholds, enhancing noise rejection in noisy digital environments.

It supports mixed-voltage interfacing: inputs tolerate voltages up to 5.5 V regardless of VCC, and the open-drain output can be pulled to a higher rail than VCC (e.g., 3.3 V device driving 5 V bus), enabling level-shifting without additional components.

Key Specifications

Pinout & Package

SN74AHC1G09DCKR uses the SC70-5 (DCK) package: 2.0 mm × 2.1 mm body size, 1.1 mm max height, 5-pin surface-mount outline with gull-wing leads. Pin 1 is marked by a dot or beveled edge at the top-left corner (Q3 quadrant in tape).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input open-drain AND gate applications.

Compared with SN74LVC1G09DCKR, the SN74AHC1G09DCKR offers guaranteed 2 V operation and superior noise immunity via Schmitt inputs; compared with MC74VHC1G09DTT1G, it provides lower thermal resistance and TI's full production support, but requires adherence to TI's SC70 pinout (A-B-GND-Y-VCC).

Availability

SN74AHC1G09DCKR is available at Aetrix Electronics and suitable for power sequencing control, digital enable logic, and level-translation interface applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for SN74AHC1G09DCKR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability industrial and automotive-grade components.

The SN74AHC1G09 belongs to TI's AHC logic family - designed for low-power, high-speed CMOS operation across wide supply ranges, targeting space-constrained industrial control, power management, and interface conditioning applications.

FAQ

What logic function does the SN74AHC1G09DCKR implement?

The SN74AHC1G09DCKR implements a single 2-input positive-AND logic function (Y = A × B) with open-drain output. It does not provide active-high push-pull drive - the output must be pulled up externally to assert a logic high. This configuration supports wired-AND bus architectures and voltage-level translation between differing supply rails.

Can SN74AHC1G09DCKR operate at 2.0 V supply voltage?

Yes, SN74AHC1G09DCKR is fully specified to operate down to 2.0 V VCC, with guaranteed performance including tPD ≤ 8.5 ns (at –55°C to +125°C, CL = 50 pF) and IOL ≥ 50 µA. This makes it suitable for battery-powered or low-voltage industrial systems where other logic families may fail to meet timing or drive requirements.

Does SN74AHC1G09DCKR have Schmitt-trigger inputs?

Yes, SN74AHC1G09DCKR features Schmitt-trigger inputs with typical hysteresis of ~0.3 V. This design enhances noise immunity on slow-rising or electrically noisy signals - such as those from mechanical switches, RC-reset networks, or long PCB traces - ensuring clean, jitter-free logic transitions without external filtering.

What is the maximum sink current capability of SN74AHC1G09DCKR?

SN74AHC1G09DCKR guarantees a minimum sink current (IOL) of 8 mA at VCC = 5 V and TA = 25°C, with derated performance (≥4 mA) maintained at VCC = 3.3 V. At full temperature range (–55°C to +125°C), it sustains ≥4 mA at 3.3 V and ≥8 mA at 4.5 V, supporting robust drive into standard TTL loads or multiple CMOS inputs.

Is SN74AHC1G09DCKR compatible with I²C bus signaling?

While not an I²C transceiver, SN74AHC1G09DCKR's open-drain output and input overvoltage tolerance make it suitable for simple I²C bus extension or arbitration logic - for example, combining multiple interrupt lines onto a shared I²C SDA line. However, it lacks built-in slew-rate control or bus fault protection, so external series resistors and pull-ups must comply with I²C specifications.