SN75ALS194NG4 Equivalent & Substitute Parts

Part Overview

The SN75ALS194NG4 is a 4/0 Driver RS422/RS485 interface IC manufactured by Texas Instruments in a 16-DIP package. This part is discontinued at DiGi Electronics, making substitute components necessary for ongoing system support and new designs. The SN75ALS194 series provides RS422 and RS485 driver functionality for serial communication applications requiring robust signal transmission over extended distances.

Substiute Parts

SN75ALS194NG4

Texas InstrumentsIn Stock: 1016SN75ALS194NG4 Datasheet

Current PartRFQ

SN75ALS194N

Texas InstrumentsIn Stock: 2334SN75ALS194N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75ALS194NG4 is determined by the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support RS422 and RS485 protocols
• Driver/Receiver Configuration: 4/0 driver configuration must be maintained
• Supply Voltage Range: 4.75V ~ 5.25V compatibility required
• Operating Temperature Range: 0°C ~ 70°C specification must be met
• Package Type: 16-DIP through-hole mounting with 0.300" (7.62mm) spacing
• Base Product Number: 75ALS194 series designation

The SN75ALS194N qualifies as a direct substitute based on identical electrical specifications and package configuration. Both parts share the same base product number, protocol support, driver count, voltage requirements, and temperature range.

Parameter Comparison

Engineering Selection Recommendations

The SN75ALS194N is a direct functional equivalent to the SN75ALS194NG4. Both parts maintain identical electrical and mechanical specifications, including supply voltage range, operating temperature, protocol support, and package configuration. The SN75ALS194N is currently available with higher inventory levels (2225 pcs) compared to the discontinued SN75ALS194NG4 (945 pcs). Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Selection between these parts should be based on availability and packaging preference (tube packaging for SN75ALS194N versus the original packaging for SN75ALS194NG4).

Frequently Asked Questions (FAQ)

Q: Can the SN75ALS194N directly replace the SN75ALS194NG4 in existing designs?

A: Yes. Both parts are electrically and mechanically identical, sharing the same base product number (75ALS194), protocol support (RS422/RS485), driver configuration (4/0), supply voltage range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and 16-DIP package footprint.

Q: What is the difference between SN75ALS194NG4 and SN75ALS194N?

A: The primary difference is packaging format. The SN75ALS194NG4 uses the original packaging, while the SN75ALS194N is supplied in tube packaging. All electrical and functional specifications are identical.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What parameters must remain constant when substituting RS422/RS485 driver ICs?

A: Critical parameters include protocol support, driver/receiver count, supply voltage range, operating temperature range, and package type. The SN75ALS194N maintains all these specifications relative to the SN75ALS194NG4.

Q: Is the SN75ALS194N still in production?

A: The SN75ALS194N is listed as obsolete. However, inventory is currently available. For long-term production requirements, consult with Texas Instruments or authorized distributors regarding extended availability.