MM54HC4049/MM74HC4049Hex Inverting Logic Level Down ConverterMM54HC4050/MM74HC4050Hex Logic Level Down ConverterGeneral Des criptionThe MM54HC4049/MM74HC4049 and the MM54HC4050/MM74HC4050 utilize advanced silicon-gate CMOS technology,and have a modified input protection structure that enablesthese parts to be used as logic level translators whichwill convert high level logic to a low level logic while operatingfrom the low logic supply. For example, 0±15V CMOSlogic can be converted to 0±5V logic when using a 5V supply.The modified input protection has no diode connectedto VCC, thus allowing the input voltage to exceed the supply.The lower zener diode protects the input from both positiveand negative static voltages. In addition each part can beused as a simple buffer or inverter without level translation.The MM54HC4049/MM74HC4049 is pin and functionallycompatible to the CD4049BM/CD4049BC and theMM54HC4050/MM74HC4050 is compatible to theCD4050BM/CD4050BCFeaturesY Typical propagation delay: 8 nsY Wide power supply range: 2V±6VY Low quiescent supply current: 20 mA maximum (74HC)Y Fanout of 10 LS-TTL loads
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