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74HC126D bảng dữ liệu(PDF) 2 Page - NXP Semiconductors |
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74HC126D bảng dữ liệu(HTML) 2 Page - NXP Semiconductors |
2 / 6 page December 1990 2 Philips Semiconductors Product specification Quad buffer/line driver; 3-state 74HC/HCT126 FEATURES • Output capability: bus driver • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT126 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 HC/HCT126 are four non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs (nY) are controlled by the output enable input (nOE). A LOW at nOE causes the outputs to assume a HIGH impedance OFF-state. The “126” is identical to the “125” but has active HIGH enable inputs. 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 = output load capacitance in pF VCC = supply voltage in V ∑ (CL × VCC2 × fo) = sum of outputs 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 to nY 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 23 24 pF |
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