54/7421 54H/74H21 54LS/74LS21 handbook
Contents
1. CONNECTION DIAGRAMS PINOUT A Vearranr o c YS4H 74H21 0 52 B4LS 74LS21 o 35 DUAL 4 INPUT POSITIVE AND GATE ORDERING CODE See Section 9 COMMERCIAL GRADE MILITARY GRADE PINOUT B OUT Voc 5 0 V 5 cies 5 0 V 10 Ta 0 C to 70 C 55 C to 125 C Plastic 7421PC 74H21PC DIP P 74LS21PC Ceramic 7421DC 74H21DC 5421DM 54H21DM DIP D 74LS21DC 54LS21DM Flatpak 7421FC 74LS21FC 5421FM 54LS21FM PT zaHetec 54H21FM INPUT LOADING FAN OUT See Section 3 for U L definitions 54 74 U L 54 74H U L 54 74LS U L HIGH LOW HIGH LOW HIGH LOW Inputs 0 1 1 25 1 25 0 5 0 25 Outputs 12 5 12 5 10 5 0 2 5 DC AND AC CHARACTERISTICS See Section 3 SYMBOL PARAMETER rae ear SA TALS m i CONDITIONS Power Supply Current ee we 4 4 4 Vin Gnd 27 12 15 ee oon EEEO Pan aia BC limits apply over operating temperature range AC limits apply at Ta 25 C and Vcc 5 0 V 4 22
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