4049 IC Hex Inverter Buffer

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4049 IC Hex Inverter Buffer The CD4049UB is a CMOS hex inverting buffer designed for single‑supply logic‑level conversion and high‑drive applications. It contains six independent inverters (buffers) capable of translating and driving up to two TTL loads directly. The device operates from 3 V to 18 V and features very low quiescent and input currents, making it ideal for mixed‑voltage systems and battery‑powered designs. Features Six inverting buffers in one package (hex inverter) Single-supply operation: 3 V to 18 V High sink current: can drive two TTL loads (I OL ≥ 3.3 mA at V CC =5 V) Logic-level conversion: input high voltage can exceed V CC Ultra-low quiescent current: 1 µA max at V CC =18 V 5 V, 10 V, and 15 V parametric ratings for versatile use Specifications Parameter Value Supply Voltage (V CC ) 3 V to 18 V Quiescent Current (I DD ) ≤ 1 µA (V CC =18 V, 25 °C) Input Current (I IN ) ≤ 1 µA (V IN =0 or 18 V) Output Low Current (I OL ) ≥ 3.3 mA (V CC =5 V, V OL =0.4 V) Output High Current (I OH ) ≥ 0.65 mA (V CC =5 V, V OH =4.6 V) Propagation Delay (t PLH /t PHL ) 60 ns / 32 ns (V CC =5 V) Input Low Voltage (V IL ) ≤ 1 V (V CC =5 V) Input High Voltage (V IH ) ≥ 4 V (V CC =5 V) Operating Temperature –55 °C to +125 °C Input Capacitance (C IN ) 15 pF typical Applications CMOS to DTL or TTL level conversion High‑voltage CMOS buffering and driving Battery‑powered and low‑power systems Drive sinks or sources for LEDs, relays, or backplanes DataSheet 4049 IC Datasheet