CD74HC245E

Overview

The CD74HC245E is an octal bus transceiver manufactured by Texas Instruments, belonging to the HC logic series. It features eight non-inverting channels with three-state outputs, designed for asynchronous bidirectional data communication between buses. The device operates within a supply voltage range of 2 V to 6 V and utilizes CMOS input and output levels. Key electrical parameters include a propagation delay of 32 ns at 5 V, low-level output current of 4 mA, and high-level output current of -4 mA. It is housed in a 14-pin DIP package and supports operation temperatures from -55 °C to +125 °C.

Feature Summary

• Provides bidirectional data transmission across eight channels with non-inverting logic functionality.
• Features three-state outputs that allow effective isolation of the bus when disabled.
• Supports wide operating voltage ranges suitable for various digital logic environments.

Applications

• Asynchronous bidirectional data communication between data buses
• Input/output expansion for microprocessor systems
• Driving bus lines or providing loads for compatible logic families

Procurement Notes

Verify the specific suffix 'E' indicates the PDIP-14 package configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering part number matches the required pin count and package style for your PCB layout. Cross-reference the datasheet revision to confirm parameter accuracy before finalizing procurement specifications.

Selection Notes

Select this component when an octal, non-inverting bus transceiver with three-state outputs is required. The HC series offers compatibility with standard CMOS logic levels. Consider the 14-pin DIP package if through-hole mounting is necessary. Verify that the 4 mA drive current meets the load requirements of the connected circuitry.

Part Context

This device is part of the CD74HC245 family of octal bus transceivers. It shares functional similarities with other 74HC series components but is distinguished by its eight-channel width and non-inverting output polarity. The 'CD' prefix typically denotes commercial grade temperature ranges in some contexts, though specific variants may support extended ranges.

Replacement Considerations

Compatible substitutes include SN74HC245DWRE4 and SN74HC245PWE4. These alternatives offer similar octal bus transceiver functionality. Verify package compatibility, as replacements may utilize SOIC or TSSOP formats instead of the DIP configuration.