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| Part Number | SN74HC640DW | SN74HC646DW | SN74HC640DWR | SN74HC640PW | SN74HC645DW | SN74HC540DW |
|---|---|---|---|---|---|---|
| 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, Non-Inverting | Transceiver, Inverting | Transceiver, Inverting | Transceiver, Non-Inverting | Buffer, Inverting |
| Number of Elements | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 8 | 8 | 8 | 8 | 8 | 8 |
| Input Type | - | - | - | - | - | - |
| Output Type | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 20-SOIC (0.295", 7.50mm Width) | 24-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-TSSOP (0.173", 4.40mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 20-SOIC | 24-SOIC | 20-SOIC | 20-TSSOP | 20-SOIC | 20-SOIC |
