SN75ALS197NS Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN75ALS197NS is a quad differential line receiver compliant with V.10, V.11, X.26, and X.27 standards, featuring Schmitt-trigger inputs and 2.2 V minimum output swing in a 16-pin SOIC package. Handles 100 µA maximum high-level input current for balanced-line bus reception. RoHS-compliant with global availability.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN75ALS197NS 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 differential Schmitt-trigger receiver compliant with V.11/X.27 standards for industrial balanced-line interfaces
- 2.2 V minimum output voltage swing ensuring reliable logic levels when driving downstream CMOS or TTL gates
- 16-pin SOIC package with 4 independent receiver channels maximizing channel density on communication interface cards
Applications
The SN75ALS197NS is used in industrial serial communication systems requiring differential line reception per V.11 (RS-422) and X.27 standards, including factory automation networks, PLC communication modules, and data acquisition interfaces. Its 4 independent receivers allow a single IC to terminate a 4-wire full-duplex RS-422 link or monitor 4 separate differential signal pairs simultaneously. The device suits telecom equipment, modem interfaces, and instrumentation that must receive balanced differential signals across long cable runs with common-mode noise rejection.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| High Level Input Current-Max | 0.0001A |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE RECEIVER |
| Interface Standard | V.10; V.11; X.26; X.27 |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 4 |
| Out Swing-Min | 2.2V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.05A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 22ns |
| Receiver Number of Bits | 4 |
| Supply Current-Max | 35mA |
| 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 (Ni/Pd/Au) |
| 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 | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN75ALS197NS:
Frequently Asked Questions
Which interface standards does the SN75ALS197NS comply with, and how many receiver channels does it contain?
The SN75ALS197NS complies with V.10, V.11, X.26, and X.27 differential interface standards, which are equivalent to the RS-422 and RS-423 electrical specifications. It contains 4 independent differential receiver channels in a single 16-pin SOIC, enabling full coverage of a 4-wire RS-422 full-duplex link with one device.
What input characteristic does the SN75ALS197NS use for robust reception on noisy differential bus lines?
The SN75ALS197NS uses differential Schmitt-trigger inputs on all 4 receiver channels. This hysteresis-based switching prevents false output transitions when the differential input voltage crosses the threshold slowly or when common-mode noise is superimposed on the balanced pair, ensuring clean digital output even with 100 µA input leakage current on the bus.
How does the SN75ALS197NS perform in long-cable RS-422 installations compared to single-ended CMOS receivers?
Because the SN75ALS197NS uses differential inputs compliant with V.11/X.27, it rejects common-mode voltages up to several volts that accumulate over long cable runs. Single-ended CMOS receivers have no such rejection and fail when ground potential differences or induced noise exceed a few hundred millivolts. The 2.2 V minimum output swing of the SN75ALS197NS also ensures strong logic signals even when the differential input is at its minimum valid level.
In a 4-axis motion controller, how can a single SN75ALS197NS replace discrete line receiver components?
A 4-axis encoder interface requires 4 differential receiver channels for the 4 encoder A-channel signals, or alternatively 2 channels for A and B on 2 axes. The SN75ALS197NS integrates all 4 channels in one 16-pin SOIC, replacing 4 individual single-channel receiver ICs and reducing PCB area by approximately 60% while maintaining V.11 compliance and Schmitt-trigger noise immunity across all 4 inputs.
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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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