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MC74AC245N
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Product Detailed Parameters
- Description：IC TXRX NON-INVERT 6V 20DIP
- Series：74AC
- Mfr：onsemi
- Package：Tube
- Logic Type：Transceiver, Non-Inverting
- Number of Elements：1
- Number of Bits per Element：8
- Input Type：-
- Output Type：3-State
- Current - Output High, Low：24mA, 24mA
- Voltage - Supply：2V ~ 6V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：20-DIP (0.300", 7.62mm)
- Supplier Device Package：20-PDIP
- Grade：-
- Qualification：-
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Overview
The MC74AC245N is an octal bidirectional transceiver with 3-state outputs belonging to the 74AC logic series. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient temperature range from -40°C to +85°C. The device features non-inverting buffers with A and B ports capable of sourcing or sinking 24 mA. Propagation delay is typically 8.5 ns at 5.0 V with a 50 pF load, while maximum quiescent supply current is 80 µA.
Feature Summary
- Bidirectional data path controlled by Transmit/Receive input
- High current drive capability at both A and B ports
- Three-state outputs for bus-oriented applications
Applications
- Bus-oriented system architectures
- Memory and memory interface control
- Driving capacitive loads
Procurement Notes
Verify that the specific part number suffix matches the required package type, as the datasheet lists SOIC-20W and TSSOP-20 options. Confirm lead-free status and check for moisture sensitivity level requirements during storage and handling. Ensure ordering information aligns with the desired shipping quantity format.
Selection Notes
Select this component when designing systems requiring wide voltage operation between 2 V and 6 V. Choose the AC series over ACT variants if TTL-compatible inputs are not strictly necessary, as the AC series offers broader voltage flexibility. Consider the 24 mA output drive strength for direct interfacing with moderate capacitive loads without additional buffering.
Part Context
This device is part of the MC74AC245/74ACT245 family manufactured by onsemi. It serves as a standard octal bus transceiver in the 74AC logic family. The product line includes variations such as the MC74AC245DWG and MC74AC245DTG, which differ primarily in packaging styles like SOIC-20 and TSSOP-20.
Replacement Considerations
MC74AC245DWG
FAQ
How does the Output Enable (OE) pin function?
When the OE input is HIGH, both A and B ports are disabled and placed in a High Z state, regardless of the Transmit/Receive input level.
What determines the direction of data flow?
The Transmit/Receive (T/R) input determines direction. An active-HIGH T/R enables data flow from A ports to B ports, while an active-LOW T/R enables data flow from B ports to A ports.
