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| Part Number | SN74LS640DBR | SN74LS640DWR | SN74LS540DBR | SN74LS640DB |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active |
| Logic Type | Transceiver, Inverting | Transceiver, Inverting | Buffer, Inverting | - |
| Number of Elements | 1 | 1 | 1 | - |
| Number of Bits per Element | 8 | 8 | 8 | - |
| Input Type | - | - | - | - |
| Output Type | 3-State | 3-State | 3-State | - |
| Current - Output High, Low | 15mA, 24mA | 15mA, 24mA | 15mA, 24mA | - |
| Voltage - Supply | 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) | - |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | - |
| Package / Case | 20-SSOP (0.209", 5.30mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-SSOP (0.209", 5.30mm Width) | - |
| Supplier Device Package | 20-SSOP | 20-SOIC | 20-SSOP | - |
