SN75ALS173NSG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN75ALS173NSG4 is a quad differential line driver from Texas Instruments in a 16-pin SOIC package, featuring ALS-logic speed, tri-state outputs, and RS-422/RS-485 compatible drive levels for reliable multi-drop bus communication. From $1.50 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN75ALS173NSG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN75ALS173NSG4?
- Quad differential outputs simultaneously driving 4 independent RS-422/RS-485 data lines from a single 5 V supply
- Tri-state output control enabling multi-drop bus configurations with up to 32 unit loads on a single bus segment
- ALS-logic speed with propagation delays under 15 ns for high-speed synchronous serial data transmission
- 16-pin SOIC (Small Outline) package providing compact PCB footprint for space-constrained industrial communication cards
- Wide operating temperature range supporting deployment in harsh industrial environments from -40°C to +85°C
What is SN75ALS173NSG4 used for?
SN75ALS173NSG4 is widely used in industrial automation controllers, PLCs, and distributed I/O systems where RS-422 or RS-485 multi-drop communication over long cable runs is required. It suits point-to-point and multi-node serial bus designs in factory floor environments where noise immunity and drive strength are critical. The device also appears in motion control encoder interfaces and legacy serial communication backplanes that require 4 differential output channels in a compact 16-pin SOIC footprint.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SN75ALS173NSG4 datasheet?
SN75ALS173NSG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN75ALS173NSG4?
Compatible alternatives and drop-in replacements for SN75ALS173NSG4:
Frequently Asked Questions
How many differential output channels does SN75ALS173NSG4 provide, and what bus standard does it support?
SN75ALS173NSG4 provides 4 independent differential output channels compliant with RS-422 and RS-485 bus standards. Each channel can source and sink sufficient current to drive a 100-ohm differential load, making it suitable for multi-drop serial networks with up to 32 unit loads sharing a single twisted-pair bus segment.
What propagation delay can be expected from SN75ALS173NSG4 in a high-speed serial link?
SN75ALS173NSG4 uses Advanced Low-Power Schottky (ALS) logic technology, achieving typical propagation delays under 15 ns from input to differential output. This enables reliable operation in synchronous serial data links at rates up to several Mbps, which is well above the 100 kbps limit of standard RS-232 interfaces.
For a PLC I/O expansion backplane, why is the tri-state feature of SN75ALS173NSG4 important?
The tri-state output capability on SN75ALS173NSG4 allows the driver outputs to be disabled (high impedance) while other devices share the same RS-485 bus. In a PLC backplane with 8 or more nodes, each driver must be individually tri-stated when not transmitting to avoid bus contention; without this feature, the bus would experience constant 5 V collisions that corrupt all data.
What package does SN75ALS173NSG4 use, and how does it compare to DIP alternatives for board layout?
SN75ALS173NSG4 is packaged in a 16-pin SOIC (Small Outline IC) with a 1.27 mm pitch, occupying approximately 60% less board area than an equivalent 16-pin DIP package. The smaller footprint and shorter lead inductance make it preferable on modern SMT production lines where board space is at a premium and automated pick-and-place assembly is used.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
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
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit