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| Part Number | SN74LS640-1N | SN74LS640-1NS | SN74LS644-1N | SN74LS645-1N | SN74LS641-1N | SN74LS642-1N |
|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active | Active | Active |
| Logic Type | Transceiver, Inverting | - | Transceiver, Inverting | Transceiver, Non-Inverting | Transceiver, Non-Inverting | Transceiver, Inverting |
| Number of Elements | 1 | - | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 8 | - | 8 | 8 | 8 | 8 |
| Input Type | - | - | - | - | - | - |
| Output Type | 3-State | - | Open Collector | 3-State | Open Collector | Open Collector |
| Current - Output High, Low | 15mA, 48mA | - | 100µA, 24mA | 15mA, 48mA | -, 48mA | -, 48mA |
| Voltage - Supply | 4.75V ~ 5.25V | - | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) | - | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole | - | Through Hole | 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) | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) |
| Supplier Device Package | 20-PDIP | - | 20-PDIP | 20-PDIP | 20-PDIP | 20-PDIP |
