The HC21 and CD74HCT21 logic gates utilize silicon gate CMOS technology to achieve operating speeds similar to LSTTL gates with the low power consumption of standard CMOS integrated circuits. All devices have the ability to drive 10 LSTTL loads. The HCT logic family is functionally pin compatible with the standard LS logic family.
Data sheet acquired from Harris Semiconductor
|Part number||Order||Technology Family||VCC (Min) (V)||VCC (Max) (V)||Channels (#)||Inputs per channel||IOL (Max) (mA)||IOH (Max) (mA)||Input type||Output type||Features||Data rate (Max) (Mbps)||Rating||Operating temperature range (C)||Package size: mm2:W x L (PKG)||Package Group|
||HCT||4.5||5.5||2||4||4||-4||TTL-Compatible CMOS||Push-Pull||High Speed (tpd 10-50ns)||25||Catalog||-55 to 125||
See datasheet (PDIP)
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)
PDIP | 14
SOIC | 14