Texas Instruments SN74ALS540N Buffers, Drivers, Receivers and Transceivers
8-channel, 3-state output buffer/inverter IC featuring bipolar technology.

Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
SN74ALS540N
Series
Base Model
Detailed Description
8-channel, 3-state output buffer/inverter IC featuring bipolar technology. Operates with a supply voltage range of 4.5V to 5.5V, ideal for 5V logic systems. Offers 24mA low-level output current and -15mA high-level output current. Packaged in a 20-pin PDIP with through-hole mounting, this RoHS compliant component has a propagation delay of 12ns.
Package
PDIP
Lifecycle Status
Active
RoHS State
RoHS Compliant
Datasheet
SN74ALS540N Datasheet
Quick Jump:
Technical Specifications
Texas Instruments SN74ALS540N Buffers, Drivers, Receivers and Transceivers technical specifications.
General
Series
74ALS
RoHS
Yes
Number of Channels
8
Package / Case
20-DIP
Mounting Type
Through Hole
Operating Temperature
0°C ~ 70°C (TA)
Supply Voltage
5V
Package
PDIP
Height
4.57mm
High Level Output Current
-15mA
Alternate Parts Comparison (SN74ALS540N vs SN74ALS153DR vs SN74ALS156DR vs SN74ALS157ADR)
Side-by-side technical parameter comparison of related primary models in this product family.
| This Part | Alternate Parts | Alternate Parts | Alternate Parts | |
|---|---|---|---|---|
| Package / Case | 20-DIP | 16-SOIC | 16-SOIC | 16-SOIC |
| Mounting Type | Through Hole | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Supply Voltage | 5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current Output High Low | 15mA, 24mA | 2.6mA, 24mA | 100µA, 8mA | 400µA, 8mA |
| Circuit | -- | 2 x 4:1 | 2 x 1:4 | 4 x 2:1 |
| Independent Circuits | -- | 1 | 1 | 1 |
| Type | -- | Multiplexer | Decoder/Demultiplexer | Multiplexer |
| Voltage Supply Source | -- | Single Supply | Single Supply | Single Supply |
| Action |
Texas Instruments SN74ALS540N Buffers, Drivers, Receivers and Transceivers Overview
8-channel, 3-state output buffer/inverter IC featuring bipolar technology. Operates with a supply voltage range of 4.5V to 5.5V, ideal for 5V logic systems. Offers 24mA low-level output current and -15mA high-level output current. Packaged in a 20-pin PDIP with through-hole mounting, this RoHS compliant component has a propagation delay of 12ns.
More Parts in Buffers, Drivers, Receivers and Transceivers
Browse additional parts from the same category, grouped by series, package type, and manufacturer. These are catalog suggestions — not verified pin-compatible alternates.