INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT540 Octal buffer/line driver; 3-state; inverting Product specification File under Integrated Circuits, IC06 December 1990
Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 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.
Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 1, 19 OE1, OE2 output enable input (active LOW) 2, 3, 4, 5, 6, 7, 8, 9 A0 to A7 data inputs 10 GND ground (0 V) 18, 17, 16, 15, 14, 13, 12, 11 Y0 to Y7 bus outputs 20 VCC positive supply voltage Fig.1 Pin configuration. December 1990 Fig.2 Logic symbol. 3 Fig.3 IEC logic symbol.
Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 FUNCTION TABLE INPUTS OUTPUT OE1 OE2 An Yn L L X H L L H X L H X X H L Z Z Notes 1. H = HIGH voltage level L = LOW voltage level X = don’t care Z = high impedance OFF-state Fig.4 Functional diagram. Fig.5 Logic diagram.
Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 DC CHARACTERISTICS FOR 74HC For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: bus driver ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (°C) TEST CONDITIONS 74HC SYMBOL PARAMETER +25 −40 to +85 min. typ. max. min. max. −40 to +125 UNIT V CC WAVEFORMS (V) min. max.
Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: bus driver ICC category: MSI Note to HCT types The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
Philips Semiconductors Product specification Octal buffer/line driver; 3-state; inverting 74HC/HCT540 AC WAVEFORMS (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. Fig.6 Waveforms showing the input (An) to output (Yn) propagation delays and the output transition times. (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. Fig.7 Waveforms showing the 3-state enable and disable times. PACKAGE OUTLINES See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
