The CD4049UB and CD4050B devices are inverting andnon-inverting hex buffers, respectively, and feature logiclevelconversion using only one supply voltage (VCC). Theinput-signal high level (VIH) can exceed the VCC supplyvoltage when these devices are used for logic-levelconversions. These devices are intended for use as CMOSto DTL/TTL converters and can drive directly two DTL/TTLloads. (VCC = 5V, VOL £ 0.4V, and IOL ³ 3.3mA.)The CD4049UB and CD4050B are designated asreplacements for CD4009UB and CD4010B, respectively.Because the CD4049UB and CD4050B require only onepower supply, they are preferred over the CD4009UB andCD4010B and should be used in place of the CD4009UBand CD4010B in all inverter, current driver, or logic-levelconversion applications. In these applications theCD4049UB and CD4050B are pin compatible with theCD4009UB and CD4010B respectively, and can besubstituted for these devices in existing as well as in newdesigns. Terminal No. 16 is not connected internally on theCD4049UB or CD4050B, therefore, connection to thisterminal is of no consequence to circuit operation. Forapplications not requiring high sink-current or voltageconversion, the CD4069UB Hex Inverter is recommended.
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