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74HC540 IC – (SMD Package) – Octal 3-state Inverting Buffer IC (74540 IC)

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The 74HC540 is identical in pinout to the LS540. The device inputs are compatible with Standard CMOS outputs. External pull−up resistors make them compatible with LSTTL outputs. The HC540A is an octal inverting buffer/line driver/line receiver designed to be used with 3−state memory address drivers, clock drivers, and other bus−oriented systems. This device features inputs and outputs on opposite sides of the package and two ANDed active−low output enables.


  • Output Drive Capability: 15 LSTTL Loads
  • Outputs Directly Interface to CMOS, NMOS, and TTL
  • Operating Voltage Range: 2.0 to 6.0 V
  • Low Input Current: 1 A
  • High Noise Immunity Characteristic of CMOS Devices
  • In Compliance With the JEDEC Standard No. 7 A Requirements
  • Chip Complexity: 124 FETs or 31 Equivalent Gates
  • NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
  • These Devices are Pb−Free and are RoHS Compliant


Symbol Parameter Value Unit
VCC Supply Voltage − 0.5 to + 7.0V V
VI DC Input Voltage –0.5 to VCC + 0.5 V
VO DC Output Voltage −0.5 ≤ VO ≤ VCC + 0.5 V
IIK DC Input Diode Current ±20 mA
IOK DC Output Diode Current ±35 mA
IO Output Current ± 35 mA
ICC or IGND DC VCC or GND Current, per pin ± 75 mA
TSTG Storage Temperature Range − 65°C to + 150 °C
PD Power Dissipation 500  mW
TL Lead Temperature 260 °C


* product image for illustration purposes only. actual product may vary.


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