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74HCT688 Datenblatt(PDF) 2 Page - NXP Semiconductors |
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74HCT688 Datenblatt(HTML) 2 Page - NXP Semiconductors |
2 / 7 page December 1990 2 Philips Semiconductors Product specification 8-bit magnitude comparator 74HC/HCT688 FEATURES • Compare two 8-bit words • Output capability: standard • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT688 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/HCT688 are 8-bit magnitude comparators. They perform comparison of two 8-bit binary or BCD words. The output provides P = Q. 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 CL = 15 pF; VCC =5 V Pn, Qn to P = Q 1717ns E to P = Q 8 12 ns CI input capacitance 3.5 3.5 pF CPD power dissipation capacitance per package notes 1 and 2 30 30 pF |
Ähnliche Teilenummer - 74HCT688 |
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Ähnliche Beschreibung - 74HCT688 |
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