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/HCT126 Quad buffer/line driver; 3-state Product specification File under Integrated Circuits, IC06 December 1990 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 TYPICAL SYMBOL PARAMETER CONDITIONS UNIT HC tPHL/ tPLH propagation delay nA to nY CI input capacitance CPD power dissipation capacitance per buffer CL = 15 pF; VCC = 5 V notes 1 and 2 Notes 1. CPD is used to determine the dynamic power dissipation (PD in W): PD = CPD x VCC2 x fi + (CL x VCC2 x fo) where: fi = input frequency in MHz fo = output frequency in MHz CL = output load capacitance in pF VCC = supply voltage in V (CL x VCC2 x 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". December 1990 2 HCT 9 11 ns 3.5 3.5 pF 23 24 pF Philips Semiconductors Product specification Quad buffer/line driver; 3-state 74HC/HCT126 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 1, 4, 10, 13 1OE to 4OE output enable inputs (active HIGH) 2, 5, 9, 12 1A to 4A data inputs 3, 6, 8, 11 1Y to 4Y data outputs 7 GND ground (0 V) 14 VCC positive supply voltage (b) (a) Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol. FUNCTION TABLE INPUTS OUTPUT nOE nA nY H H L L H X L H Z Note 1. H = HIGH voltage level L = LOW voltage level X = don't care Z = high impedance OFF-state Fig.4 Functional diagram. December 1990 Fig.5 Logic diagram (one buffer). 3 Philips Semiconductors Product specification Quad buffer/line driver; 3-state 74HC/HCT126 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 -40 to +85 +25 min. tPHL/ tPLH tPZH/ tPZL tPHZ/ tPLZ tTHL/ tTLH propagation delay nA to nY typ. max. min. max. -40 to +125 min. UNIT VCC WAVEFORMS (V) max. 30 100 125 150 11 20 25 30 ns 2.0 4.5 9 17 21 26 3-state output enable time nOE to nY 41 125 155 190 15 25 31 38 4.5 12 21 26 32 6.0 3-state output disable time nOE to nY 41 125 155 190 15 25 31 38 4.5 12 21 26 32 6.0 output transition time 14 60 75 90 5 12 15 18 4.5 4 10 13 15 6.0 December 1990 4 Fig.6 6.0 ns ns ns 2.0 2.0 2.0 Fig.7 Fig.7 Fig.6 Philips Semiconductors Product specification Quad buffer/line driver; 3-state 74HC/HCT126 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 unit, multiply this value by the unit load coefficient shown in the table below. INPUT UNIT LOAD COEFFICIENT nA, nOE 1.00 AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) TEST CONDITIONS 74HCT SYMBOL PARAMETER -40 to +85 +25 min. typ. max. min. max. -40 to +125 min. UNIT VCC WAVEFORMS (V) max. tPHL/ tPLH propagation delay nA to nY 14 24 30 36 ns 4.5 Fig.6 tPZH/ tPZL 3-state output enable time nOE to nY 13 25 31 38 ns 4.5 Fig.7 tPHZ/ tPLZ 3-state output disable time nOE to nY 18 28 35 42 ns 4.5 Fig.7 tTHL/ tTLH output transition time 5 12 15 18 ns 4.5 Fig.6 December 1990 5 Philips Semiconductors Product specification Quad buffer/line driver; 3-state 74HC/HCT126 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 (nA) to output (nY) 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". December 1990 6