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74HC540D-74HC540DB-74HC540N-74HCT540D-74HCT540DB-74HCT540N
74HC/HCT540; Octal buffer/line driver; 3-state; inverting
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state;
inverting 74HC/HCT540
FEATURES Inverting outputs Output capability: bus driver ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT540 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/HCT540 are octal inverting buffer/line drivers
with 3-state outputs. The 3-state outputs are controlled by
the output enable inputs OE1 and OE2.
A HIGH on OEn causes the outputs to assume a high
impedance OFF-state.
The “540” is identical to the “541” but has inverting outputs.
QUICK REFERENCE DATAGND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
Notes CPD is used to determine the dynamic power dissipation (PDin μW): = CPD× VCC2×fi +∑ (CL× VCC2×fo) where: = input frequency in MHz = output frequency in MHz (CL× VCC2×fo) = sum of outputs= output load capacitance in pF
VCC= supply voltage in V For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC− 1.5 V
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package Information”.
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state; inverting 74HC/HCT540
PIN DESCRIPTION
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state; inverting 74HC/HCT540
FUNCTION TABLE
Notes H = HIGH voltage level = LOW voltage level= don’t care= high impedance OFF-state
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state; inverting 74HC/HCT540
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
AC CHARACTERISTICS FOR 74HCGND = 0 V; tr = tf = 6 ns; CL = 50 pF
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state; inverting 74HC/HCT540
DC CHARACTERISTICS FOR 74HCTFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
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 = 50 pF