SN75ALS194NE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
SN75ALS194NE4 is a quad differential RS-422 line driver with 2 dual-channel driver functions compliant to EIA-422-B and V.11 standards. It drives balanced lines at TTL logic levels in a 16-pin DIP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN75ALS194NE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN75ALS194NE4?
- Quad RS-422/EIA-422-B differential line driver with 4 independent balanced outputs for noise-immune long-distance data transmission
- High-speed ALS bipolar process enables typical propagation delays under 10 ns for demanding industrial serial bus applications
- 5V single-supply operation with TTL-compatible inputs simplifies direct connection to legacy CMOS and TTL logic controllers
- 16-pin PDIP package offers through-hole convenience for prototypes and industrial control panels requiring hand-soldered assembly
What is SN75ALS194NE4 used for?
SN75ALS194NE4 drives RS-422 balanced differential pairs in industrial automation, CNC machine tool communications, and process control networks requiring reliable data transmission over cable distances up to 1200 m. Its ALS process enables high data rates while maintaining compatibility with EIA-422-B and ITU-T V.11 standards. The device is commonly used in legacy DCS and PLC backplane interfaces where through-hole DIP assembly and robust noise immunity are required.
What are the specifications of SN75ALS194NE4?
| YTEOL | 0 |
| Differential Output | YES |
| Driver Number of Bits | 2 |
| High Level Input Current-Max | 0.00005A |
| Input Characteristics | STANDARD |
| Interface IC Type | LINE DRIVER |
| Interface Standard | V.11; EIA-422-B |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Number of Functions | 2 |
| Out Swing-Min | 2V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.048A |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max | 45mA |
| Supply Voltage-Max | 5.25V |
| Supply Voltage-Min | 4.75V |
| Supply Voltage-Nom | 5V |
| Supply Voltage1-Max | 5.25V |
| Supply Voltage1-Min | 4.75V |
| Supply Voltage1-Nom | 5V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Transmit Delay-Max | 14ns |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mexico |
Where can I find the SN75ALS194NE4 datasheet?
SN75ALS194NE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN75ALS194NE4?
Compatible alternatives and drop-in replacements for SN75ALS194NE4:
Frequently Asked Questions
Over what cable length can SN75ALS194NE4 reliably transmit RS-422 data, and at what maximum bit rate?
RS-422 with SN75ALS194NE4 supports cable runs up to 1200 m at lower data rates or up to approximately 10 Mbit/s over shorter cables. The EIA-422-B standard defines a distance-rate tradeoff: at 100 kbit/s the reach extends to about 1200 m, while at 10 Mbit/s the practical cable length drops to around 15 m with standard 120 Ω twisted-pair termination.
How does SN75ALS194NE4 compare to RS-485 drivers when building a point-to-point industrial serial link?
SN75ALS194NE4 implements unidirectional RS-422 differential outputs suited for dedicated point-to-point links where a transmitter always drives a single receiver. RS-485 drivers add tri-state control for bus sharing among up to 32 unit loads, but SN75ALS194NE4's simpler 4-driver architecture delivers lower propagation delay, typically under 15 ns, making it better for deterministic timing in CNC or motion-control encoder feedback at signal levels of ±5V differential.
What logic supply voltage and input threshold does SN75ALS194NE4 require for TTL compatibility?
SN75ALS194NE4 operates from a single 5V supply and accepts TTL-compatible inputs with a standard high-level input current of 50 µA maximum. The TTL threshold allows direct connection to 5V microcontrollers and PLCs without level shifters, and the ALS bipolar process keeps input current low enough to avoid loading the driving logic gate in multi-drop backplane designs.
In what legacy industrial communication scenarios is the 16-pin DIP package of SN75ALS194NE4 a practical procurement advantage?
Field maintenance environments—such as retrofitting older PLC racks, replacing failed drivers on industrial terminal boards, or prototype development on breadboards—benefit from the 16-pin PDIP package since it allows hand-soldering and IC socket replacement without SMD rework tools. The through-hole DIP form factor is stocked for decades of service life on brownfield installations running EIA-422-B links at 5V.
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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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