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74HC20DB-74HC20N-74HCT20D-74HCT20DB
74HC/HCT20; Dual 4-input NAND gate
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
FEATURES Output capability: standard ICC category: SSI
GENERAL DESCRIPTIONThe 74HC/HCT20 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/HCT20 provide the 4-input NAND function.
QUICK REFERENCE DATAGND=0 V; Tamb =25 °C; tr =tf =6ns
Notes CPD is used to determine the dynamic power dissipation (PD in μW): =CPD× VCC2×fi+∑ (CL× VCC2× fo) where: = input frequency in MHz = output frequency in MHz= output load capacitance in pF
VCC= supply voltage in V (CL× VCC2× fo) = sum of outputs For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC− 1.5V
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package Information”.
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
PIN DESCRIPTION
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
FUNCTION TABLE
Notes H= HIGH voltage level= LOW voltage level= don’t care
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: SSI
AC CHARACTERISTICS FOR 74HCGND= 0 V; tr =tf=6 ns; CL =50pF
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
DC CHARACTERISTICS FOR 74HCTFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: SSI
Note to HCT typesThe value of additional quiescent supply current (ΔICC) for a unit load of 1 is given in the family specifications.
To determine ΔICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCTGND=0 V; tr =tf=6 ns; CL =50pF
AC WAVEFORMS
PACKAGE OUTLINES
