CD74HC243EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HC243EE4 is a quad bidirectional bus transceiver IC from Texas Instruments in the HC/UH CMOS family, featuring 4 data channels with 3-state outputs and independent output enable for each direction, operating across a 2 V to 6 V supply with a 50 pF load capacitance. It supports non-inverting bidirectional data transfer in a 14-pin DIP package. Available from stock globally with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC243EE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5830(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC243EE4?
- Independent output enable for each direction allows precise control of data flow direction on shared 4-bit buses without bus contention
- 3-state outputs on all 4 channels enable multiplexing of multiple transceivers on the same bus with guaranteed high-impedance idle state
- Wide 2 V to 6 V supply range in a 14-pin DIP package supports mixed-voltage system interfacing and easy prototyping on breadboards
What is CD74HC243EE4 used for?
CD74HC243EE4 is used in microprocessor data bus buffering, memory interface expansion, and bidirectional level translation between subsystems that share a common 4-bit data bus. Its independent direction control enables half-duplex communication protocols where a master and slave alternate transmitting on the same lines. The non-inverting 3-state design simplifies wired-bus arbitration in embedded system backplanes.
What are the specifications of CD74HC243EE4?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | WITH INDEPENDENT OUTPUT ENABLE FOR EACH DIRECTION |
| Control Type | INDEPENDENT CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T14 |
| 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 | 4 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| 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 | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia, Mexico |
Where can I find the CD74HC243EE4 datasheet?
CD74HC243EE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC243EE4?
Compatible alternatives and drop-in replacements for CD74HC243EE4:
Frequently Asked Questions
How does the independent direction enable of CD74HC243EE4 prevent bus contention on shared data lines?
CD74HC243EE4 provides a separate output-enable pin for each of the 2 data directions, so only one direction is actively driven at any time while the opposite side remains in the high-impedance 3-state mode. This eliminates bus contention when 2 bus masters alternate ownership of the 4 shared data lines.
What supply voltage range does CD74HC243EE4 support, and why does this aid mixed-voltage system design?
CD74HC243EE4 operates across a 2 V to 6 V supply range as part of the HC/UH CMOS family, allowing it to interface between 3.3 V and 5 V logic subsystems. With a 50 pF load capacitance rating, it can drive standard CMOS logic inputs reliably across the full operating range without external resistive level shifters in many designs.
In which embedded system scenarios does CD74HC243EE4 offer the most design benefit?
CD74HC243EE4 is most valuable in 4-bit shared memory bus expansion, microcontroller peripheral interfacing over a multiplexed bus, and backplane data routing where 4 bidirectional channels must switch direction under software control. Its non-inverting architecture avoids the inversion compensation overhead needed with inverting transceivers in these applications.
When is the 14-pin DIP package of CD74HC243EE4 the right choice for a new design?
The 14-pin DIP package of CD74HC243EE4 is ideal during rapid prototyping and lab evaluation phases because it plugs directly into standard 0.1-inch breadboards and DIP sockets, allowing engineers to test bus transceiver behavior with 4 bidirectional channels before committing to a surface-mount layout in production.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.2840 | $1.28 |
| 20+ | $0.7704 | $15.41 |
| 79+ | $0.6420 | $50.72 |
| 1000+ | $0.6150 | $615.00 |
| 3000+ | $0.5970 | $1791.00 |
| 5000+ | $0.5830 | $2915.00 |
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