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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/HCT27 Triple 3-input NOR gate
Product specification File under Integrated Circuits, IC06 December 1990
Philips Semiconductors
Product specification
Triple 3-input NOR gate
FEATURES * Output capability: standard * ICC category: SSI GENERAL DESCRIPTION
74HC/HCT27
The 74HC/HCT27 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/HCT27 provide the 3-input NOR function.
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 x VCC2 x fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 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, nB, nC to nY input capacitance power dissipation capacitance per gate notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 8 3.5 24 HCT 10 3.5 30 ns pF pF UNIT
December 1990
2
Philips Semiconductors
Product specification
Triple 3-input NOR gate
PIN DESCRIPTION PIN NO. 1, 3, 9 2, 4, 10 13, 5, 11 7 12, 6, 8 14 SYMBOL 1A to 3A 1B to 3B 1C to 3C GND 1Y to 3Y VCC NAME AND FUNCTION data inputs data inputs data inputs ground (0 V) data outputs positive supply voltage
74HC/HCT27
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
FUNCTION TABLE INPUTS nA L X X H Notes 1. H = HIGH voltage level L = LOW voltage level X = don't care Fig.4 Functional diagram. Fig.5 Logic diagram (one gate). nB L X H X nC L H X X OUTPUT nY H L L L
December 1990
3
Philips Semiconductors
Product specification
Triple 3-input NOR gate
DC CHARACTERISTICS FOR 74HC For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: SSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HC SYMBOL PARAMETER +25 min. typ. tPHL/ tPLH propagation delay nA, nB, nC to nY output transition time 28 10 8 19 7 6 max. 90 18 15 75 15 13 -40 to +85 min. max. 115 23 20 95 19 16 -40 to +125 min. max. 135 27 23 110 22 19 ns UNIT
74HC/HCT27
TEST CONDITIONS VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 WAVEFORMS
Fig.6
tTHL/ tTLH
ns
Fig.6
December 1990
4
Philips Semiconductors
Product specification
Triple 3-input NOR gate
DC CHARACTERISTICS FOR 74HCT For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: SSI Note to HCT types
74HC/HCT27
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, nB, nC
UNIT LOAD COEFFICIENT 1.50
AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HCT SYMBOL PARAMETER min. tPHL/ tPLH tTHL/ tTLH propagation delay nA, nB, nC to nY output transition time +25 typ. 12 7 -40 to +85 max. min. 21 15 max. 26 19 -40 to +125 min. max. 32 22 ns ns 4.5 4.5 Fig.6 Fig.6 UNIT VCC (V) WAVEFORMS TEST CONDITIONS
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, nB, nC) to output (nY) propagation delays and the output transition times.
PACKAGE OUTLINES See "74HC/HCT/HCU/HCMOS Logic Package Outlines".
December 1990
5

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