SN74HCT245PWR - Electronic component TEXAS INSTRUMENTS - Free user manual and instructions
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| Product Type | Octal Bus Transceiver |
| Manufacturer | Texas Instruments |
| Part Number | SN74HCT245PWR |
| Logic Family | HCT (High-Speed CMOS, TTL Compatible) |
| Number of Channels | 8-bit bidirectional |
| Output Type | 3-state, non-inverting |
| Supply Voltage | 4.5 V to 5.5 V |
| Typical Propagation Delay | 20 ns |
| Maximum Clock Frequency | Not applicable (transceiver) |
| Package Type | TSSOP-20 (PWR suffix) |
| Package Dimensions | 6.5 mm x 4.4 mm x 1.15 mm |
| Weight | Approximately 0.06 g |
| Operating Temperature Range | -40 degC to +85 degC |
| Mounting Type | Surface Mount |
| Input/Output Compatibility | TTL compatible |
| Main Functions | Bidirectional data transfer, bus buffering, signal routing |
| Quiescent Current | Typically 8 uA (maximum 40 uA) |
| Output Current | +/-6 mA (sink/source) at 5V operation |
| Maintenance | No routine maintenance required; keep free from moisture and contamination |
| Cleaning | Use a soft dry cloth or antistatic brush; avoid chemical solvents |
| Safety | Electrostatic discharge (ESD) sensitive; observe anti-static handling procedures |
| Spare Parts & Repairability | Integrated circuit; not user-serviceable, replace the component if faulty |
| Compliance | RoHS compliant (lead-free) for PWR package |
Frequently Asked Questions - SN74HCT245PWR TEXAS INSTRUMENTS
What is the SN74HCT245PWR?
This device is a high-speed CMOS octal bus transceiver from Texas Instruments. It provides bidirectional data transfer with 3-state outputs, designed for bus-oriented systems.
What is the supply voltage range for the SN74HCT245PWR?
The recommended supply voltage is 4.5 V to 5.5 V, making it compatible with standard 5 V TTL logic systems.
What does the DIR (direction) control pin do?
The DIR pin determines the transmission direction. When DIR is high, data passes from A to B; when low, data passes from B to A.
What does the OE (output enable) pin do?
The OE pin controls the output state. When OE is high, the outputs are placed in a high-impedance (3-state) condition, disabling the outputs.
What is the difference between HCT and HC logic families?
HCT (High-Speed CMOS with TTL compatibility) is pin and level compatible with TTL inputs, while HC operates with standard CMOS levels. HCT is ideal for interfacing with TTL logic.
Can the SN74HCT245 be used for level shifting?
Yes, it can shift between TTL and CMOS levels. Because it operates from a 5 V supply and its inputs are TTL compatible, it can translate TTL signals to CMOS levels and vice versa.
What does "3-state output" mean?
3-state outputs have three possible states: high, low, and high-impedance. This allows multiple outputs to share a common bus without contention.
How much current can the outputs handle?
Each output can sink or source up to 6 mA (typical at 5 V), suitable for driving LEDs, logic inputs, and small loads.
What are the package dimensions of the SN74HCT245PWR?
The PWR suffix indicates a TSSOP-20 package with dimensions of approximately 6.5 mm x 4.4 mm and a height of 1.15 mm.
How should I handle this ESD-sensitive device?
As with most CMOS devices, the SN74HCT245PWR is ESD sensitive. Use an antistatic wrist strap and conductive foam for storage, and avoid touching the pins without proper grounding.
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