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 74HC/HCT14 FEATURES • Output capability: standard • ICC category: SSI GENERAL DESCRIPTION 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 PARAMETER CONDITIONS UNIT HC tPHL/ tPLH propagation delay nA to nY CI input capacitance CPD power dissipation capacitance per gate CL = 15 pF; VCC = 5 V notes 1 and 2 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”. September 1993 2 HCT 12 17 ns 3.5 3.5 pF 7 8 pF Philips Semiconductors Product specification Hex inverting Schmitt trigger 74HC/HCT14 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 1, 3, 5, 9, 11, 13 1A to 6A data inputs 2, 4, 6, 8, 10, 12 1Y to 6Y data outputs 7 GND ground (0 V) 14 VCC positive supply voltage Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol. FUNCTION TABLE INPUT OUTPUT nA nY L H H L Notes 1. H = HIGH voltage level L = LOW voltage level APPLICATIONS • Wave and pulse shapers • Astable multivibrators • Monostable multivibrators Fig.4 Functional diagram. September 1993 Fig.5 Logic diagram (one Schmitt trigger). 3 Philips Semiconductors Product specification Hex inverting Schmitt trigger 74HC/HCT14 DC CHARACTERISTICS FOR 74HC 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) TEST CONDITIONS 74HC SYMBOL PARAMETER −40 to +85 +25 min. typ. max. min. max. −40 to +125 min. UNIT VCC WAVEFORMS (V) max. VT+ positive-going threshold 0.7 1.7 2.1 1.18 2.38 3.14 1.5 3.15 4.2 0.7 1.7 2.1 1.5 3.15 4.2 0.7 1.7 2.1 1.5 3.15 4.2 V 2.0 4.5 6.0 Figs 6 and 7 VT − negative-going threshold 0.3 0.9 1.2 0.52 1.40 1.89 0.90 2.00 2.60 0.3 0.90 1.20 0.90 2.00 2.60 0.30 0.90 1.2 0.90 2.00 2.60 V 2.0 4.5 6.0 Figs 6 and 7 VH hysteresis (VT+ − VT−) 0.2 0.4 0.6 0.66 0.98 1.25 1.0 1.4 1.6 0.2 0.4 0.6 1.0 1.4 1.6 0.2 0.4 0.6 1.0 1.4 1.6 V 2.0 4.5 6.0 Figs 6 and 7 AC CHARACTERISTICS FOR 74HC GND = 0 V; tf = tf = 6 ns; CL = 50 pF Tamb (°C) TEST CONDITIONS 74HC 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 41 15 12 125 25 21 155 31 26 190 38 32 ns 2.0 4.5 6.0 Fig.8 tTHL/ tTLH output transition time 19 7 6 75 15 13 95 19 15 110 22 19 ns 2.0 4.5 6.0 Fig.8 September 1993 4 Philips Semiconductors Product specification Hex inverting Schmitt trigger 74HC/HCT14 DC CHARACTERISTICS FOR 74HCT 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 UNIT LOAD COEFFICIENT nA 0.3 Transfer characteristics for 74HCT Voltages are referenced to GND (ground = 0 V) 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. VT+ positive-going threshold 1.2 1.4 1.41 1.59 1.9 2.1 1.2 1.4 1.9 2.1 1.2 1.4 1.9 2.1 V 4.5 5.5 Figs 6 and 7 VT − negative-going threshold 0.5 0.6 0.85 0.99 1.2 1.4 0.5 0.6 1.2 1.4 0.5 0.6 1.2 1.4 V 4.5 5.5 Figs 6 and 7 VH hysteresis (VT+ −VT−) 0.4 0.4 0.56 0.60 − − 0.4 0.4 − − 0.4 0.4 − − V 4.5 5.5 Figs 6 and 7 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 (V) WAVEFORMS max. tPHL/ tPLH propagation delay nA, to nY 20 34 43 51 ns 4.5 Fig.8 tTHL/ tTLH output transition time 7 15 19 22 ns 4.5 Fig.8 September 1993 5 Philips Semiconductors Product specification Hex inverting Schmitt trigger 74HC/HCT14 TRANSFER CHARACTERISTIC WAVEFORMS 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 74HC/HCT14 APPLICATION INFORMATION The slow input rise and fall times cause additional power dissipation, this can be calculated using the following formula: Pad = fi × (tr × ICCa + tf × ICCa) × VCC. Where: Pad = additional power dissipation (µW) fi = input frequency (MHz) tr = input rise time (µs); 10% − 90% tf = input fall time (µs); 10% − 90% ICCa = average additional supply current (µA) 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 Fig.15 Average ICC for HCT 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. Note to Application information All values given are typical unless otherwise specified. PACKAGE OUTLINES 1 1 HC : f = --- ≈ ------------------T 0.8 RC 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