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| PartNumber | SN74LS540N | SN74LS540NDIP | SN74LS540NE4 |
| Description | Buffers & Line Drivers Octal Buff/Line Drvr W/3-State Otpt | Bus Driver, LS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDIP20 | |
| Manufacturer | Texas Instruments | - | Texas Instruments |
| Product Category | Logic - Buffers, Drivers, Receivers, Transceivers | - | Logic - Buffers, Drivers, Receivers, Transceivers |
| Series | 74LS | - | 74LS |
| Packaging | Tube Alternate Packaging | - | Tube Alternate Packaging |
| Unit Weight | 0.042297 oz | - | - |
| Mounting Style | Through Hole | - | - |
| Package Case | PDIP-20 | - | 20-DIP (0.300", 7.62mm) |
| Operating Temperature | 0°C ~ 70°C | - | 0°C ~ 70°C |
| Mounting Type | Through Hole | - | Through Hole |
| Output Type | 3-State | - | - |
| Number of Channels | 8 | - | - |
| Voltage Supply | 4.75 V ~ 5.25 V | - | 4.75 V ~ 5.25 V |
| Supplier Device Package | 20-PDIP | - | 20-PDIP |
| Number of Elements | 1 | - | 1 |
| Current Output High Low | 15mA, 24mA | - | 15mA, 24mA |
| Logic Type | Buffer/Line Driver, Inverting | - | Buffer/Line Driver, Inverting |
| Number of Bits per Element | 8 | - | 8 |
| Maximum Operating Temperature | + 70 C | - | - |
| Minimum Operating Temperature | 0 C | - | - |
| Polarity | Inverting | - | - |
| Operating Supply Current | 45 uA | - | - |
| Supply Voltage Max | 5.25 V | - | - |
| Supply Voltage Min | 4.75 V | - | - |
| Logic Family | LS | - | - |
| Propagation Delay Time | 15 ns at 5 V | - | - |
| High Level Output Current | - 15 mA | - | - |
| Low Level Output Current | 24 mA | - | - |
| Number of Input Lines | 8 Input | - | - |
| Number of Output Lines | 8 Output | - | - |