Overview
The SN74HCT245DWR, produced by Texas Instruments, is an octal bus transceiver with 3-state outputs designed for asynchronous two-way communication between data buses. This device is part of the SNx4HCT245 family and is optimized for use in various electronic systems requiring reliable and efficient data transmission. The SN74HCT245DWR features a control-function implementation that minimizes external timing requirements, allowing data to be transmitted from the A bus to the B bus or vice versa based on the logic level at the direction-control (DIR) input. Additionally, the output-enable (OE) input can disable the device, effectively isolating the buses.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 4.5 | 5.5 | V | |
| High-Level Output Voltage (IOH = -20 µA, VCC = 4.5 V) | 4.4 | 4.499 | V | |
| Low-Level Output Voltage (IOL = 20 µA, VCC = 4.5 V) | 0.001 | 0.1 | V | |
| Output Drive (IOH, IOL at VCC = 5 V) | -6 | 6 | mA | |
| Input Current (VI = VCC or 0, TA = 25°C) | ±100 nA | A | ||
| Supply Current (ICC, VI = VCC or 0, IO = 0, TA = 25°C) | 80 µA | A | ||
| Propagation Delay (tpd, CL = 50 pF, VCC = 5 V) | 14 | 25 | ns | |
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Operating voltage range of 4.5 V to 5.5 V, forgiving of 5-V power supply rail accuracy.
- High-Current 3-state outputs capable of driving bus lines directly or up to 15 LSTTL loads.
- Low power consumption with a maximum static supply current of 80 µA.
- Typical propagation delay of 14 ns and balanced output drive of ±6 mA at 5 V.
- Low input current of 1 µA maximum and TTL-voltage compatible inputs.
- Active low output enable and direction control for flexible data transmission.
- Center VCC and GND pin configurations to minimize high-speed switching noise.
Applications
- Factory Automation and Control
- Grid Infrastructure
- Electronic Point of Sale
- Multi-Function Printers
- Motor Drives
- Storage
- Telecom Infrastructure
Q & A
- What is the primary function of the SN74HCT245DWR? The SN74HCT245DWR is designed for asynchronous two-way communication between data buses, allowing data transmission from the A bus to the B bus or vice versa based on the direction-control input.
- What is the operating voltage range of the SN74HCT245DWR? The operating voltage range is from 4.5 V to 5.5 V.
- How much current can the outputs drive? The outputs can drive up to ±6 mA at 5 V and can handle up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HCT245DWR? The typical propagation delay is 14 ns.
- How does the output-enable (OE) input function? The OE input can disable the device, effectively isolating the buses when set to high.
- What are the key applications of the SN74HCT245DWR? Key applications include factory automation, grid infrastructure, electronic point of sale, multi-function printers, motor drives, storage, and telecom infrastructure.
- What is the maximum supply current of the SN74HCT245DWR? The maximum static supply current is 80 µA.
- Is the SN74HCT245DWR compatible with TTL voltage levels? Yes, the inputs are TTL-voltage compatible.
- What is the operating temperature range of the SN74HCT245DWR? The operating temperature range is from -40°C to 85°C.
- What package options are available for the SN74HCT245DWR? It is available in a 20-pin SOIC (DW) package among others.
