The HC240 and HCT240 are inverting three-state buffers having two active-low output enables. The CD74HC241, HCT241, HC244 and HCT244 are non-inverting three-state buffers that differ only in that the 241 has one active-high and one active-low output enable, and the 244 has two active-low output enables. All three types have identical pinouts.
Data sheet acquired from Harris Semiconductor
|Part number||Order||Technology Family||VCC (Min) (V)||VCC (Max) (V)||Bits (#)||Voltage (Nom) (V)||F @ nom voltage (Max) (MHz)||ICC @ nom voltage (Max) (mA)||tpd @ nom Voltage (Max) (ns)||IOL (Max) (mA)||IOH (Max) (mA)||Schmitt trigger||Rating||Operating temperature range (C)|
||HC||2||6||8||6||28||0.08||21||6||-6||No||Military||-55 to 125|
||HC||2||6||8||6||28||0.08||21||6||-6||No||Catalog||-55 to 125|