74HCT245PW-Q100J

Overview

The Nexperia 74HCT245PW-Q100J is an octal bus transceiver with 3-state outputs, designed for automotive applications. It operates within a supply voltage range of 4.5 V to 5.5 V and supports temperatures from -40 °C to +125 °C. The device features TTL input levels and non-inverting data transfer controlled by OE (active LOW) and DIR pins. Propagation delay is specified at 12 ns maximum at 4.5 V. It is housed in a TSSOP-20 package (SOT360-1).

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards.
• TTL-compatible input logic levels for direct interfacing.
• Bidirectional octal bus interface with direction control via DIR pin.
• High noise immunity and low power CMOS dissipation.

Applications

• Automotive electronic systems requiring robust signal transmission.
• Octal bidirectional bus interfaces in vehicle networks.
• Systems operating between 4.5 V and 5.5 V supply rails.

Procurement Notes

Verify the specific suffix 'Q100J' matches the required automotive grade and temperature range specifications. Confirm the TSSOP-20 package variant aligns with PCB layout requirements. Ensure compatibility with the 4.5 V to 5.5 V operating voltage window defined in the datasheet before finalizing procurement orders.

Selection Notes

Select this component when TTL-level inputs are required for an octal bus application. It is suitable for designs needing high-temperature operation up to 125 °C. Consider the 12 ns propagation delay for timing constraints. Verify that the TSSOP-20 footprint fits the assembly constraints compared to other available packages like SO20 or DHVQFN.

Part Context

This part belongs to the Nexperia 74HCT245-Q100 family of octal bus transceivers. It shares functional similarities with the 74HC245-Q100 but differs in input logic thresholds, specifically supporting TTL levels unlike the CMOS-only HC variant. The Q100 designation indicates automotive-grade reliability and extended temperature coverage.

Replacement Considerations

The 74HCT245PW,118 is a non-automotive equivalent with identical electrical characteristics and package. For automotive replacements, verify if other 74HCT245 variants with AEC-Q100 qualification are available from the manufacturer.

FAQ

What is the input logic level for the 74HCT245PW-Q100J?

The device accepts TTL input levels, distinguishing it from the HC series which uses CMOS levels.

How is the direction of data transfer controlled?

Direction is controlled by the DIR pin; a HIGH on DIR sets B to A input, while a LOW sets A to B input.

What is the maximum operating temperature?

The device is specified for operation up to +125 °C ambient temperature.