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74HCT27N Datasheet(PDF) 2 Page - NXP Semiconductors |
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74HCT27N Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 5 page December 1990 2 Philips Semiconductors Product specification Triple 3-input NOR gate 74HC/HCT27 FEATURES • Output capability: standard • ICC category: SSI GENERAL DESCRIPTION The 74HC/HCT27 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT27 provide the 3-input NOR function. QUICK REFERENCE DATA GND = 0 V; Tamb =25 °C; tr =tf = 6 ns Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD =CPD × VCC2 × fi +∑ (CL × VCC2 × fO) where: fi = input frequency in MHz fo = output frequency in MHz ∑ (CL × VCC2 × fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC − 1.5 V ORDERING INFORMATION See “74HC/HCT/HCU/HCMOS Logic Package Information”. SYMBOL PARAMETER CONDITIONS TYPICAL UNIT HC HCT tPHL/ tPLH propagation delay nA, nB, nC to nY CL = 15 pF; VCC = 5 V 8 10 ns CI input capacitance 3.5 3.5 pF CPD power dissipation capacitance per gate notes 1 and 2 24 30 pF |
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