74HC540PWJ

Overview

The Nexperia 74HC540PWJ is an octal buffer and line driver with inverting outputs and three-state capability, housed in a TSSOP20 package (SOT360-1). It operates on a supply voltage range of 2.0 V to 6.0 V. The device features two active-low output enable inputs (OE1 and OE2) that force outputs into a high-impedance state when asserted HIGH. Inputs include clamp diodes for interfacing with voltages exceeding VCC. It complies with JEDEC standards JESD8C and JESD7A, offering high noise immunity and CMOS low power dissipation.

Feature Summary

• Octal inverting buffer/line driver with three-state outputs
• Dual active-low output enables for independent control
• Input clamp diodes allow interface to voltages above VCC
• High noise immunity with robust latch-up performance

Applications

• Driving bus lines or memory address registers
• Clock distribution circuits
• General-purpose buffering in digital systems

Procurement Notes

Verify the specific suffix 'J' against the manufacturer's current ordering information to confirm packaging details and compliance status. Ensure the design accounts for the TSSOP20 thermal characteristics and pinout configuration defined in SOT360-1. Cross-reference the datasheet revision date to confirm all electrical specifications match the intended operating conditions.

Selection Notes

Select this component for applications requiring eight-channel signal inversion with tri-state isolation. The wide supply voltage range supports operation across standard logic families. Verify input transition rates against dynamic characteristic limits to ensure signal integrity. Consider the package thermal derating requirements if operating at elevated ambient temperatures.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices manufactured by Nexperia. The 74HC540 specifically provides octal buffering capabilities within this family. It is distinct from the 74HCT variant which utilizes TTL-compatible input levels. The PWJ designation indicates the TSSOP20 package variant with specific manufacturing attributes.

Replacement Considerations

Direct functional equivalents include the 74HC540D and 74HC540DB. For identical package compatibility, verify availability of other 74HC540 variants in TSSOP20.