CD74HCT245E-NG Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The Texas Instruments CD74HCT245E-NG is an 8-bit bidirectional bus transceiver in a 20-pin DIP package, compatible with TTL and CMOS logic levels from 4.5V to 5.5V. It provides non-inverting tri-state outputs with direction and output enable controls for flexible bus interfacing. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD74HCT245E-NG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit bidirectional bus transceiver with tri-state outputs enables flexible data direction control in shared-bus microprocessor systems
- HCT logic family provides direct TTL-input compatibility while delivering CMOS-level output swing for mixed-logic board designs
- 20-pin DIP package supports through-hole PCB assembly and breadboard prototyping for development and legacy system applications
- Direction and output enable pins allow the transceiver to be easily isolated from the bus, preventing signal contention in multi-master designs
Applications
The CD74HCT245E-NG is commonly used as a data bus buffer and level translator between TTL and CMOS subsystems in microprocessor-based designs, embedded controllers, and data acquisition systems. It is well-suited for memory expansion interfaces, I/O port isolation, and signal buffering in industrial control panels where board-level bus sharing between multiple devices is required. The device is also a popular choice in educational and prototyping environments due to its through-hole DIP form factor and straightforward bidirectional control interface.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the CD74HCT245E-NG used for?
The CD74HCT245E-NG is an 8-bit bidirectional bus transceiver used to buffer and translate data between two logic buses, commonly found in microprocessor systems, memory interfaces, and I/O expansion circuits where direction and output enable control is needed.
What package does the CD74HCT245E-NG come in?
The CD74HCT245E-NG is available in a 20-pin DIP (Dual-In-Line Package), a through-hole package ideal for breadboarding, prototyping, and legacy PCB designs that require manual soldering or socketed component replacement.
What supply voltage range does the CD74HCT245E-NG support?
The CD74HCT245E-NG operates over a supply voltage range of 4.5V to 5.5V, with HCT-family inputs designed to be fully TTL-compatible, accepting standard TTL voltage levels while providing full CMOS output drive at the 5V rail.
Can the CD74HCT245E-NG be used for TTL to CMOS level translation?
Yes, the CD74HCT245E-NG is specifically designed with HCT inputs that accept TTL logic levels (low threshold ~0.8V, high threshold ~2.0V) while its outputs swing to full CMOS levels, making it ideal for interfacing TTL-output devices with CMOS-input components.
What is the difference between the direction pin and output enable pin on the CD74HCT245E-NG?
The direction pin (DIR) controls whether data flows from port A to B or B to A, while the output enable pin (OE) enables or disables all outputs simultaneously placing them in a high-impedance tri-state condition, preventing bus contention in multi-device systems.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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