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| Part Number | SN74HCT640N | SN74HCT645N | SN74HCT240N | SN74HCT540N |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active |
| Logic Type | - | Transceiver, Non-Inverting | Buffer, Inverting | Buffer, Inverting |
| Number of Elements | - | 1 | 2 | 1 |
| Number of Bits per Element | - | 8 | 4 | 8 |
| Input Type | - | - | - | - |
| Output Type | - | 3-State | 3-State | 3-State |
| Current - Output High, Low | - | 6mA, 6mA | 6mA, 6mA | 6mA, 6mA |
| Voltage - Supply | - | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | - | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | - | Through Hole | Through Hole | Through Hole |
| Package / Case | - | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) |
| Supplier Device Package | - | 20-PDIP | 20-PDIP | 20-PDIP |
