SN74HCS245RKSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCS245RKSR is an octal bus transceiver featuring Schmitt-trigger inputs and three-state outputs. It operates within a supply voltage range of 2 V to 6 V, supporting an extended ambient temperature range from -40°C to +125°C. The device provides ±7.8-mA output drive capability at 6 V. Propagation delay ranges from 7 ns to 49 ns depending on the supply voltage. It utilizes a 20-pin VQFN package with dimensions of 4.50 mm by 2.50 mm.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Schmitt-trigger inputs provide hysteresis for tolerance against slow or noisy input signals.
• Three-state outputs allow effective isolation of buses when disabled.
• Low power consumption with typical supply current of 100 nA.

Buffers, Drivers, Receivers, Transceivers Applications

• Enable or disable digital signals
• Eliminate slow or noisy input signals
• Hold a signal during controller reset
• Debounce a switch

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific RKS ordering suffix corresponds to the 20-pin VQFN package configuration. Confirm that the component meets RoHS compliance requirements for your assembly process. Ensure the supplier provides documentation verifying the extended temperature rating of -40°C to +125°C. Check for any specific handling instructions related to the thermal pad in the VQFN package.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when noise immunity is critical due to its Schmitt-trigger architecture. It is suitable for applications requiring bidirectional data transfer between buses with varying voltage levels within the 2 V to 6 V range. Consider the low static power consumption for battery-operated systems. Verify that the package size fits the available PCB real estate constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74HCS245 family of octal bus transceivers. It shares functional similarities with other HC/HCT series devices but distinguishes itself through enhanced noise rejection capabilities provided by the Schmitt-trigger inputs. The RKSR variant specifically denotes the surface-mount VQFN packaging option offered by Texas Instruments.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCS245RKT

Buffers, Drivers, Receivers, Transceivers FAQ

How do Schmitt-trigger inputs benefit this device?

They provide hysteresis, making the device tolerant to slow or noisy input signals and preventing undefined states caused by signal ringing.

What is the function of the OE pin?

The Output Enable (OE) pin controls all outputs; a low state enables the selected direction, while a high state places all outputs in a high-impedance state.