SN75173DE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN75173DE4 is a quad differential line receiver from Texas Instruments supporting RS-422, RS-423, and RS-485 standards. Features four 3-state outputs with differential Schmitt-trigger inputs tolerating ±7V common-mode range and operating from a 5V supply. Available from $2.20 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN75173DE4 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
- Quad RS-485/RS-422 receiver with differential Schmitt-trigger inputs providing 200mV hysteresis for reliable noise immunity on long cable runs
- Three-state outputs with enable control allow direct connection to microcontroller data buses and 16-bit parallel port interfaces
- ±7V common-mode input voltage range exceeds EIA-485 requirements, tolerating ground potential differences across building-wide industrial networks
Applications
SN75173DE4 is widely used as the receive-side interface in RS-485 multi-drop networks for industrial automation, building control systems, and SCADA nodes where cable runs exceed 100m. Its quad receiver structure allows four independent channels to be monitored from a single IC, reducing the IC count in PLC input cards and protocol converters. The 16-pin SOIC package and 5V operation make it a straightforward replacement in legacy RS-422 data acquisition systems and DMX512 lighting controllers.
Specifications
| YTEOL | 0 |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE RECEIVER |
| Interface Standard | V.10; V.11; X.26; X.27; EIA-422-B; TIA-422-B; EIA-423-B; TIA-423-B; EIA-485-A; TIA-485-A |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 4 |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.016A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 35ns |
| Receiver Number of Bits | 4 |
| Supply Current-Max | 70mA |
| Supply Voltage-Max | 5.25V |
| Supply Voltage-Min | 4.75V |
| Supply Voltage-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 |
| 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 SN75173DE4:
Frequently Asked Questions
How many independent RS-485 or RS-422 receive channels does SN75173DE4 provide, and how are outputs controlled?
SN75173DE4 integrates 4 independent differential receiver channels in a single 16-pin SOIC package. Each channel has a 3-state output controlled by a shared output-enable pin, allowing all four outputs to be connected simultaneously to a single 4-bit microcontroller data bus port without bus contention. This reduces the IC count on RS-485 multiplexer boards that previously needed two dual-channel receivers to achieve 4 input ports.
What common-mode input voltage range does SN75173DE4 support, and why does this matter for long-cable industrial networks?
SN75173DE4 accepts common-mode input voltages from -7V to +12V, which exceeds the EIA-485 standard requirement of -7V to +12V. In industrial plants where equipment is spread across multiple buildings, ground potential differences of 3V to 5V are common due to separate power grids or earth loops. The wide common-mode range ensures correct data reception even when cable shields carry significant ground offset voltages, preventing data corruption on RS-485 runs up to 1200m at 100 kbps.
For a DMX512 lighting control node, how does the differential Schmitt-trigger input of SN75173DE4 improve signal integrity?
The differential Schmitt-trigger input provides 200mV of hysteresis, meaning the output switches high when the differential input exceeds +200mV and switches low only when it drops below -200mV. This prevents output chatter caused by slow-edge transitions or noise spikes on long DMX512 cable runs that can degrade below the standard 200mV EIA-485 threshold. In practice, the Schmitt hysteresis extends reliable DMX512 reception distance from about 300m to over 500m on 22 AWG shielded twisted-pair cable.
What is the maximum data rate supported by SN75173DE4 and how does it compare to faster RS-485 receiver alternatives for high-speed serial links?
SN75173DE4 supports data rates up to 10 Mbps on short cables under 1m, and derate to 100 kbps at maximum 1200m cable length per EIA-485 guidelines. For links requiring above 10 Mbps such as RS-485 at 32 Mbps or RS-422 profibus at 12 Mbps, alternatives like SN65HVD1782 rated to 50 Mbps are preferred. SN75173DE4 is optimally matched to legacy industrial protocols operating at 9600 baud to 1 Mbps where its quad-channel density and SOIC-16 package provide the best cost-per-channel value.
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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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