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| Part Number | CD74HC240E | CD74HC243E | CD74HC245E | CD74HC242E | CD74HC640E | CD74HC540E | CD74HC241E | CD74HC240M | CD74HC244E |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Harris Corporation | Harris Corporation | Harris Corporation | Harris Corporation | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Obsolete | Obsolete | Active | Obsolete | Active | Active | Active | Active |
| Logic Type | Buffer, Inverting | Transceiver, Non-Inverting | Transceiver, Non-Inverting | Transceiver, Inverting | Transceiver, Inverting | Buffer, Inverting | Buffer, Non-Inverting | Buffer, Inverting | Buffer, Non-Inverting |
| Number of Elements | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 |
| Number of Bits per Element | 4 | 4 | 8 | 4 | 8 | 8 | 4 | 4 | 4 |
| Input Type | - | - | - | - | - | - | - | - | - |
| Output Type | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA | 7.8mA, 7.8mA | 5.2mA, 5.2mA | 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 | 2V ~ 6V | 2V ~ 6V | 2V ~ 6V |
| Operating Temperature | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -40°C ~ 85°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Surface Mount | Through Hole |
| Package / Case | 20-DIP (0.300", 7.62mm) | 14-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) | 20-DIP (0.300", 7.62mm) | 20-SOIC (0.295", 7.50mm Width) | 20-DIP (0.300", 7.62mm) |
| Supplier Device Package | 20-PDIP | 14-PDIP | 20-PDIP | 16-PDIP | 20-PDIP | 20-PDIP | 20-PDIP | 20-SOIC | 20-PDIP |
