SN74HCT540

ACTIVE

8-ch, 4.5-V to 5.5-V inverters with TTL-compatible CMOS inputs and 3-state outputs

Texas Instruments SN74HCT540 Product Info

1 April 2026 4

Parameters

Technology family	HCT
Supply voltage (min) (V)	4.5
Supply voltage (max) (V)	5.5
Number of channels	8
IOL (max) (mA)	6
IOH (max) (mA)	-6
Supply current (max) (µA)	80
Input type	TTL-Compatible CMOS
Output type	3-State
Features	Balanced outputs, Input clamp diode, Very high speed (tpd 5-10ns)
Rating	Catalog
Operating temperature range (°C)	-40 to 85

Package

PDIP (N)-20-228.702 mm² 24.33 x 9.4

Features

Operating Voltage Range of 4.5 V to 5.5 V
Low Power Consumption, 80-µA Max I_CC
Typical t_pd = 12 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads
Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)

Operating Voltage Range of 4.5 V to 5.5 V
Low Power Consumption, 80-µA Max I_CC
Typical t_pd = 12 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads
Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)

Description

These octal buffers and line drivers are designed to have the performance of the HCT240 devices and a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit board layout.

The 3-state control gate is a 2-input NOR. If either output-enable (OE1 or OE2) input is high, all eight outputs are in the high-impedance state. The HCT540 devices provide inverted data at the outputs.

To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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ELECTRONIC COMPONENTS
All In One Distributor

SN74HCT540

8-ch, 4.5-V to 5.5-V inverters with TTL-compatible CMOS inputs and 3-state outputs

Texas Instruments SN74HCT540 Product Info

Parameters

Package

Features

Description

SUBMITTED SUCCESSFULLY！

ELECTRONIC COMPONENTS All In One Distributor

SN74HCT540

8-ch, 4.5-V to 5.5-V inverters with TTL-compatible CMOS inputs and 3-state outputs

Texas Instruments SN74HCT540 Product Info

Parameters

Package

Features

Description

SUBMITTED SUCCESSFULLY！

ELECTRONIC COMPONENTS
All In One Distributor