SN75ALS174ADWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN75ALS174ADWG4 is a quad RS-485/EIA-422-B differential line driver with 4 independent channels in a 20-pin SOIC, supporting data rates up to 10 Mbps for robust industrial serial communications. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN75ALS174ADWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 independent differential output channels comply with EIA-485, EIA-422-B, and TIA-442-B standards for multi-vendor interoperability
- Standard driver outputs support data rates up to 10 Mbps over twisted-pair cables spanning hundreds of meters in noisy industrial environments
- 20-pin SOIC package consolidates 4 channels to replace 4 single-channel drivers, cutting board area and connector count in multi-channel RS-485 nodes
Applications
The SN75ALS174ADWG4 is designed for multi-channel RS-485 and RS-422 data transmission in industrial automation, building management systems, and programmable logic controller networks where long-distance differential signaling over hundreds of meters is required. It drives up to 4 independent differential pairs simultaneously, making it ideal for PLC input/output expansion modules, SCADA field device interfaces, and factory floor machine-to-machine communication buses. The device suits any application replacing single-channel transceivers with a compact quad solution to reduce PCB footprint and component count in dense industrial backplanes.
Specifications
| YTEOL | 0 |
| Differential Output | YES |
| Driver Number of Bits | 4 |
| High Level Input Current-Max | 0.00002A |
| Input Characteristics | STANDARD |
| Interface IC Type | LINE DRIVER |
| Interface Standard | EIA-422-B; TIA-442-B; EIA-485 |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Number of Functions | 4 |
| Out Swing-Min | 1.5V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.06A |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 55mA |
| 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 | YES |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 22ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN75ALS174ADWG4:
Frequently Asked Questions
How far can SN75ALS174ADWG4 drive an RS-485 signal at 100 kbps versus at 10 Mbps?
RS-485 cable distance scales inversely with data rate per the EIA-485 standard. At 100 kbps the SN75ALS174ADWG4 can drive balanced twisted-pair cable up to approximately 1200 m, while at 10 Mbps the maximum reliable distance drops to around 15 m due to cable capacitance and signal rise-time constraints. For industrial sensor buses such as Modbus RTU at 9600 baud, the device easily covers plant-floor distances well over 500 m with proper 120 Ω termination at each end.
In a PLC expansion rack with 4 serial ports, how does SN75ALS174ADWG4 reduce BOM complexity compared with discrete single-channel drivers?
Replacing 4 individual single-channel RS-485 driver ICs (each in SOT-23-5 or SO-8 packages) with a single SN75ALS174ADWG4 in a 20-pin SOIC eliminates 3 ICs, at minimum 12 decoupling capacitors, and simplifies PCB routing from 4 IC placements to one. The 20-pin package fits all 4 differential output pairs in approximately 130 mm², compared with roughly 160 mm² for four separate SO-8 packages, and reduces the pick-and-place step count, lowering assembly cost in high-volume industrial I/O modules.
What termination resistor value should be used with SN75ALS174ADWG4 on a multi-drop RS-485 bus with 32 nodes?
For a multi-drop EIA-485 network, the characteristic impedance of standard twisted-pair cable is 100 Ω to 120 Ω, so termination resistors of 120 Ω are placed at each end of the bus cable to eliminate reflections. The SN75ALS174ADWG4 driver outputs meet EIA-485's requirement to drive up to 32 unit loads on a single bus segment, meaning up to 32 standard receivers can be connected without a repeater. Adding a 120 Ω resistor between each differential pair end ensures clean signal integrity at data rates from 9600 bps through 10 Mbps.
Related Guides
EEEFK1E470P Selection Guide for 47 uF SMD Aluminum Electrolytic Capacitors
Selection guidance for EEEFK1E470P and nearby Panasonic FK or FT SMD aluminum electrolytic capacitors for power-rail bulk decoupling.
Jul 7, 2026
EEEFT1V101AP Design Guide for SMD Aluminum Electrolytic Bulk Decoupling
Design guidance for using EEEFT1V101AP as an SMD aluminum electrolytic bulk capacitor in power-rail decoupling and hold-up networks.
Jul 7, 2026
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 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.
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.”