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| 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/HCT14 Hex inverting Schmitt trigger Product specification File under Integrated Circuits, IC06 September 1993 Philips Semiconductors Product specification Hex inverting Schmitt trigger FEATURES * Output capability: standard * ICC category: SSI GENERAL DESCRIPTION 74HC/HCT14 The 74HC/HCT14 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/HCT14 provide six inverting buffers with Schmitt-trigger action. They are capable of transforming slowly changing input signals into sharply defined, jitter-free output signals. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 C; tr = tf = 6 ns TYPICAL SYMBOL tPHL/ tPLH CI CPD 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". PARAMETER propagation delay nA to nY input capacitance power dissipation capacitance per gate notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 12 3.5 7 17 3.5 8 HCT ns pF pF UNIT September 1993 2 Philips Semiconductors Product specification Hex inverting Schmitt trigger PIN DESCRIPTION PIN NO. 1, 3, 5, 9, 11, 13 2, 4, 6, 8, 10, 12 7 14 SYMBOL 1A to 6A 1Y to 6Y GND VCC NAME AND FUNCTION data inputs data outputs ground (0 V) positive supply voltage 74HC/HCT14 Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol. FUNCTION TABLE INPUT nA L H Notes 1. H = HIGH voltage level L = LOW voltage level APPLICATIONS * Wave and pulse shapers * Astable multivibrators * Monostable multivibrators Fig.4 Functional diagram. Fig.5 Logic diagram (one Schmitt trigger). OUTPUT nY H L September 1993 3 Philips Semiconductors Product specification Hex inverting Schmitt trigger DC CHARACTERISTICS FOR 74HC 74HC/HCT14 For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Transfer characteristics are given below. Output capability: standard ICC category: SSI Transfer characteristics for 74HC Voltages are referenced to GND (ground = 0 V) Tamb (C) 74HC SYMBOL PARAMETER +25 min. VT+ positive-going threshold negative-going threshold hysteresis (VT+ - VT-) 0.7 1.7 2.1 0.3 0.9 1.2 0.2 0.4 0.6 typ. 1.18 2.38 3.14 0.52 1.40 1.89 0.66 0.98 1.25 max. 1.5 3.15 4.2 0.90 2.00 2.60 1.0 1.4 1.6 -40 to +85 min. 0.7 1.7 2.1 0.3 0.90 1.20 0.2 0.4 0.6 max. 1.5 3.15 4.2 0.90 2.00 2.60 1.0 1.4 1.6 -40 to +125 min. 0.7 1.7 2.1 0.30 0.90 1.2 0.2 0.4 0.6 max. 1.5 3.15 4.2 0.90 2.00 2.60 1.0 1.4 1.6 V 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 Figs 6 and 7 UNIT VCC WAVEFORMS (V) TEST CONDITIONS VT - V Figs 6 and 7 VH V Figs 6 and 7 AC CHARACTERISTICS FOR 74HC GND = 0 V; tf = tf = 6 ns; CL = 50 pF Tamb (C) 74HC SYMBOL PARAMETER +25 min. tPHL/ tPLH propagation delay nA to nY output transition time typ. 41 15 12 19 7 6 max. 125 25 21 75 15 13 -40 to +85 min. max. 155 31 26 95 19 15 -40 to +125 min. max. 190 38 32 110 22 19 ns 2.0 4.5 6.0 2.0 4.5 6.0 Fig.8 UNIT VCC WAVEFORMS (V) TEST CONDITIONS tTHL/ tTLH ns Fig.8 September 1993 4 Philips Semiconductors Product specification Hex inverting Schmitt trigger DC CHARACTERISTICS FOR 74HCT 74HC/HCT14 For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Transfer characteristics are given below. Output capability: standard ICC category: SSI 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. INPUT nA UNIT LOAD COEFFICIENT 0.3 Transfer characteristics for 74HCT Voltages are referenced to GND (ground = 0 V) Tamb (C) 74HCT SYMBOL PARAMETER +25 min. VT+ VT - VH positive-going threshold negative-going threshold hysteresis (VT+ -VT-) 1.2 1.4 0.5 0.6 0.4 0.4 typ. 1.41 1.59 0.85 0.99 0.56 0.60 max. 1.9 2.1 1.2 1.4 - - -40 to +85 min. 1.2 1.4 0.5 0.6 0.4 0.4 max. 1.9 2.1 1.2 1.4 - - -40 to +125 min. 1.2 1.4 0.5 0.6 0.4 0.4 max. 1.9 2.1 1.2 1.4 - - V V V 4.5 5.5 4.5 5.5 4.5 5.5 Figs 6 and 7 Figs 6 and 7 Figs 6 and 7 UNIT VCC WAVEFORMS (V) TEST CONDITIONS AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HCT SYMBOL PARAMETER +25 min. tPHL/ tPLH tTHL/ tTLH propagation delay nA, to nY output transition time typ. 20 7 max. 34 15 -40 to +85 min. max. 43 19 -40 to +125 min. max. 51 22 ns ns 4.5 4.5 Fig.8 Fig.8 UNIT VCC (V) WAVEFORMS TEST CONDITIONS September 1993 5 Philips Semiconductors Product specification Hex inverting Schmitt trigger TRANSFER CHARACTERISTIC WAVEFORMS 74HC/HCT14 Fig.7 Fig.6 Transfer characteristic. Waveforms showing the definition of VT+, VT- and VH; where VT+ and VT- are between limits of 20% and 70%. Fig.8 Typical HC transfer characteristics; VCC = 2 V. Fig.9 Typical HC transfer characteristics; VCC = 4.5 V. Fig.10 Typical HC transfer characteristics; VCC = 6 V. Fig.11 Typical HCT transfer characteristics; VCC = 4.5 V. September 1993 6 Philips Semiconductors Product specification Hex inverting Schmitt trigger 74HC/HCT14 Fig.12 Typical HCT transfer characteristics; VCC = 5.5 V. AC WAVEFORMS (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V. Fig.13 Waveforms showing the input (nA) to output (nY) propagation delays and output transitions times. September 1993 7 Philips Semiconductors Product specification Hex inverting Schmitt trigger APPLICATION INFORMATION The slow input rise and fall times cause additional power dissipation, this can be calculated using the following formula: Pad = fi x (tr x ICCa + tf x ICCa) x VCC. Where: Pad fi tr tf ICCa = additional power dissipation (W) = input frequency (MHz) = input rise time (s); 10% - 90% = input fall time (s); 10% - 90% = average additional supply current (A) 74HC/HCT14 Average ICCa differs with positive or negative input transitions, as shown in Figs 14 and 15. Fig.14 Average ICC for HC Schmitt trigger devices; linear change of Vi between 0.1 VCC to 0.9 VCC HC/HCT14 used in a relaxation oscillator circuit, see Fig.16. Fig.15 Average ICC for HCT Schmitt trigger devices; linear change of Vi between 0.1 VCC to 0.9 VCC. Note to Application information All values given are typical unless otherwise specified. 1 1 HC : f = -- -----------------T 0.8 RC PACKAGE OUTLINES See "74HC/HCT/HCU/HCMOS Logic Package Outlines". 1 1 HCT : f = -- --------------------T 0.67 RC Fig.16 Relaxation oscillator using HC/HCT14. September 1993 8 |
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