CD74HC243MT Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD74HC243MT is a quad bidirectional bus transceiver from Texas Instruments, featuring 3-state outputs and independent output enable for each direction in the HC high-speed CMOS family. Key specs: bidirectional data flow, 50 pF load capacitance, 14-pin SOIC package. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC243MT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Quad bidirectional bus transceiver with 3-state outputs for non-interfering shared bus connections
- Independent output enable control for each direction allowing flexible half-duplex and full-duplex bus management
- HC/UH high-speed CMOS family providing fast switching speeds with low power consumption
- 14-pin SOIC (Small Outline IC) surface-mount package suitable for compact PCB designs
Applications
The CD74HC243MT is used in microprocessor systems, data buses, and backplane interconnects where bidirectional data transfer between different logic sections is required. Its independent directional enables make it ideal for memory interface expansion, I/O port buffering, and bus isolation in embedded and industrial systems. The 3-state output capability ensures multiple transceivers can share a common bus without signal contention.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | WITH INDEPENDENT OUTPUT ENABLE FOR EACH DIRECTION |
| Control Type | INDEPENDENT CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.0078A |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 20ns |
| Propagation Delay (tpd) | 135ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HC243MT:
Bus Transceiver, HC/UH Series, 1-Func, 4-Bit, True Output, CMOS, PDSO14
Frequently Asked Questions
What does bidirectional mean for the CD74HC243MT?
Bidirectional means the CD74HC243MT can transfer data in both directions on the bus — from A-to-B or B-to-A — controlled by direction enable pins. This makes it suitable for bus interfaces where data flows in both directions at different times.
What is the purpose of the independent output enable in the CD74HC243MT?
The CD74HC243MT features independent output enable for each direction, allowing one side to be actively driving while the other is in high-impedance (3-state) mode. This is critical for avoiding bus contention in bidirectional communication systems.
What package does the CD74HC243MT come in?
The CD74HC243MT is available in a 14-pin Small Outline Package (SOIC), designated JESD-30 code R-PDSO-G14. This surface-mount package is compact and widely compatible with standard PCB assembly processes.
What logic family does the CD74HC243MT belong to?
The CD74HC243MT belongs to the HC/UH (High-Speed CMOS) logic family, which offers fast propagation speeds and low quiescent current consumption, making it suitable for battery-powered and high-frequency digital designs.
What are typical applications for the CD74HC243MT?
Typical applications include microprocessor data bus buffering, memory address line sharing, backplane bus interconnects, and I/O expansion in embedded systems where bidirectional 3-state signal routing across 4 lines is needed simultaneously.
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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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