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74HCT540 Folha de dados(PDF) 2 Page - NXP Semiconductors |
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74HCT540 Folha de dados(HTML) 2 Page - NXP Semiconductors |
2 / 7 page December 1990 2 Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 FEATURES • Inverting outputs • Output capability: bus driver • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT540 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/HCT540 are octal inverting buffer/line drivers with 3-state outputs. The 3-state outputs are controlled by the output enable inputs OE1 and OE2. A HIGH on OEn causes the outputs to assume a high impedance OFF-state. The “540” is identical to the “541” but has inverting outputs. 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 An to Yn CL = 15 pF; VCC = 5 V 9 11 ns CI input capacitance 3.5 3.5 pF CPD power dissipation capacitance per buffer notes 1 and 2 39 44 pF |
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Descrição semelhante - 74HCT540 |
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