CD 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 (IOL ≥ 3.3 mA at VCC=5 V)
Logic-level conversion: input high voltage can exceed VCC
Ultra-low quiescent current: 1 µA max at VCC=18 V
5 V, 10 V, and 15 V parametric ratings for versatile use

Specifications
Parameter Value
Supply Voltage (VCC) 3 V to 18 V
Quiescent Current (IDD) ≤ 1 µA (VCC=18 V, 25 °C)
Input Current (IIN) ≤ 1 µA (VIN=0 or 18 V)
Output Low Current (IOL) ≥ 3.3 mA (VCC=5 V, VOL=0.4 V)
Output High Current (IOH) ≥ 0.65 mA (VCC=5 V, VOH=4.6 V)
Propagation Delay (tPLH/tPHL) 60 ns / 32 ns (VCC=5 V)
Input Low Voltage (VIL) ≤ 1 V (VCC=5 V)
Input High Voltage (VIH) ≥ 4 V (VCC=5 V)
Operating Temperature –55 °C to +125 °C
Input Capacitance (CIN) 15 pF typical