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| Product attributes | Property Value |
| Manufacturer | Fairchild Semiconductor |
| Product Series | 74HCT |
| Packaging | Bulk | |
| Part Status | Active |
| 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 | 7.2mA, 7.2mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 20-TSSOP |
| ROHS |  |
The MM74HCT245MTCX is an octal bidirectional transceiver from Fairchild Semiconductor, designed for 5V TTL systems. It features 3-State outputs and TTL-compatible inputs, making it ideal for interfacing legacy logic with modern CMOS. Operating from 4.5V to 5.5V, it is perfect for data bus buffering, level translation, and industrial control applications.
- TTL-Compatible Inputs: Directly interfaces with 5V TTL logic without extra components.
- Bidirectional Operation: Simplifies PCB layout by allowing data flow in both directions with a single IC.
- 3-State Outputs: Enables bus sharing and prevents data corruption in multi-master systems.
- Wide 4.5V to 5.5V Supply: Tolerates 5V supply variations, ensuring reliable operation.
Bidirectional Bus Transceiver
Connect two 5V data buses with the MM74HCT245MTCX. The direction pin (DIR) controls data flow, while the output enable (OE) allows bus isolation.
TTL-to-CMOS Level Translation
Since 74HCT inputs are TTL-compatible, this transceiver can interface legacy TTL logic to CMOS logic running at 5V, ensuring proper logic levels.
Microprocessor Data Bus Buffering
Use it to buffer the data bus between a microprocessor and memory or I/O devices. The 3-State outputs prevent bus contention during read/write cycles.
Backplane Driver for 5V Systems
Drive multiple cards on a 5V backplane. The 7.2mA output current is sufficient for short to medium-length traces.
Industrial Control Signal Routing
In factory automation, route control signals between PLCs and sensor modules. The bidirectional nature simplifies wiring.
Test Equipment and Instrumentation
Use as a signal router in bench test equipment to switch data paths between different measurement modules.
- Q: What is the logic family of the MM74HCT245MTCX?
- A: It is from the 74HCT family, which is TTL-compatible and operates at 5V.
- Q: What is the function of this IC?
- A: It is an octal (8-bit) non-inverting transceiver with 3-State outputs.
- Q: How many channels does it have?
- A: It has 8 bidirectional channels (1 bus).
- Q: What is the output type?
- A: It features 3-State outputs for bidirectional bus communication.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it ideal for 5V TTL systems.
- Q: What package is it available in?
- A: It comes in a 20-pin TSSOP package (0.173" width).
MM74HCT245MTCX.pdf
- Q: What is the logic family of the MM74HCT245MTCX?
- A: It is from the 74HCT family, which is TTL-compatible and operates at 5V.
- Q: What is the function of this IC?
- A: It is an octal (8-bit) non-inverting transceiver with 3-State outputs.
- Q: How many channels does it have?
- A: It has 8 bidirectional channels (1 bus).
- Q: What is the output type?
- A: It features 3-State outputs for bidirectional bus communication.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it ideal for 5V TTL systems.
- Q: What package is it available in?
- A: It comes in a 20-pin TSSOP package (0.173" width).