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74LS245 Octal Bus Transceiver
74LS245
Texas Instrumentsic logic
The 74LS245 is an octal bus transceiver with 3-state outputs, designed for asynchronous two-way communication between data buses. It supports direction control and output enable functions.
In stock
Specifications
8- Operating Voltage
- 4.5 V to 5.5 V (SN54LS245) / 4.75 V to 5.25 V (SN74LS245)
- Supply Current
- 48 mA to 90 mA (outputs high), 62 mA to 95 mA (outputs low), 70 mA (outputs open) mA
- Interface
- GPIO
- Resolution
- 2 V to 3.4 V for high-level output voltage, 0.4 V to 2 V for low-level output voltage V
- Range
- -18 mA to -3 mA (high-level input current), 20 µA to 200 µA (off-state output current)
- Accuracy
- ±0.4 V for hysteresis V
- Temperature Range
- -55°C to 125°C (SN54LS245) / 0°C to 70°C (SN74LS245) °C
- Package
- CDIP, CFP, SSOP, SOIC, PDIP, or SO
Pinout
20| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | DIR | GPIO | Controls signal direction; Low = Bx to Ax, High = Ax to Bx |
| 2 | A1 | GPIO | Channel 1, A side |
| 3 | A2 | GPIO | Channel 2, A side |
| 4 | A3 | GPIO | Channel 3, A side |
| 5 | A4 | GPIO | Channel 4, A side |
| 6 | A5 | GPIO | Channel 5, A side |
| 7 | A6 | GPIO | Channel 6, A side |
| 8 | A7 | GPIO | Channel 7, A side |
| 9 | A8 | GPIO | Channel 8, A side |
| 10 | GND | GND | |
| 11 | B8 | GPIO | Channel 8, B side |
| 12 | B7 | GPIO | Channel 7, B side |
| 13 | B6 | GPIO | Channel 6, B side |
| 14 | B5 | GPIO | Channel 5, B side |
| 15 | B4 | GPIO | Channel 4, B side |
| 16 | B3 | GPIO | Channel 3, B side |
| 17 | B2 | GPIO | Channel 2, B side |
| 18 | B1 | GPIO | Channel 1, B side |
| 19 | OE | GPIO | Active low output enable; Low = all channels active, High = all channels disabled (high impedance) |
| 20 | VCC | POWER | Power supply |
Interactive pinout
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74LS245
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