DS26LS32CN/NOPB Equivalent & Substitute Parts

Part Overview

The DS26LS32CN/NOPB is a 0/4 Receiver IC for RS422 and RS423 serial communication protocols, manufactured by Texas Instruments in a 16-DIP through-hole package. This part is classified as obsolete, which necessitates identifying functionally equivalent alternatives for new designs or system maintenance. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and communication protocol requirements.

Substiute Parts

DS26LS32CN/NOPB

Texas InstrumentsIn Stock: 878DS26LS32CN/NOPB Datasheet

Current PartRFQ

AM26C32CN

Texas InstrumentsIn Stock: 4368AM26C32CN Datasheet

MFR RecommendedRFQ

AM26LS32ACN

Texas InstrumentsIn Stock: 5251AM26LS32ACN Datasheet

DirectRFQ

AM26LS33ACN

Texas InstrumentsIn Stock: 3552AM26LS33ACN Datasheet

DirectRFQ

AM26LS32AIN

Texas InstrumentsIn Stock: 973AM26LS32AIN Datasheet

UpgradeRFQ

SN75ALS193N

Texas InstrumentsIn Stock: 9892SN75ALS193N Datasheet

MFR RecommendedRFQ

SN75ALS197N

Texas InstrumentsIn Stock: 1194SN75ALS197N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS26LS32CN/NOPB are selected based on the following critical parameters:

• Package Compatibility: All substitutes must use 16-DIP (0.300", 7.62mm) through-hole packaging to ensure direct PCB compatibility
• Protocol Support: Parts must support RS422 and/or RS423 serial communication protocols
• Receiver Configuration: All parts maintain 0/4 receiver configuration
• Supply Voltage Range: Substitutes must operate within or encompass the 4.5V ~ 5.5V supply range
• Operating Temperature: Substitutes must support at least the 0°C ~ 70°C range
• Receiver Hysteresis: Acceptable range is 50 mV to 120 mV for RS422/RS423 applications

Substitutes are categorized by their relationship to the original part: manufacturer-recommended alternatives, direct functional equivalents, and upgraded variants with extended temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: AM26LS32ACN

The AM26LS32ACN is the preferred substitute for new designs. It maintains active product status with Texas Instruments, ensuring long-term availability and support. This part provides full RS422/RS423 protocol compatibility, operates within the required temperature range, and uses the identical 16-DIP package. The supply voltage range (4.75V ~ 5.25V) is narrower than the original but remains compatible with standard 5V systems. Receiver hysteresis of 50 mV is within acceptable parameters for RS422/RS423 applications.

Secondary Recommendation: SN75ALS193N

The SN75ALS193N is an active product alternative with identical package and protocol support. This part features 120 mV receiver hysteresis, which provides enhanced noise immunity compared to the original 100 mV specification. It is suitable for applications requiring higher hysteresis margins in noisy environments.

Alternative for Extended Temperature Range: AM26LS32AIN

The AM26LS32AIN extends the operating temperature range to -40°C ~ 85°C, making it suitable for industrial or automotive applications requiring wider temperature operation. This part is obsolete but remains available in inventory. Protocol and package compatibility are maintained.

Compatibility Note: AM26C32CN

The AM26C32CN provides functional equivalence with reduced receiver hysteresis (60 mV). While obsolete, it remains in stock and is suitable for direct replacement in existing systems where hysteresis reduction is acceptable.

Frequently Asked Questions (FAQ)

Q: Can AM26LS32ACN directly replace DS26LS32CN/NOPB on existing PCBs?

A: Yes. Both parts use identical 16-DIP through-hole packaging with the same pin configuration. No PCB modifications are required. The narrower supply voltage range (4.75V ~ 5.25V vs. 4.5V ~ 5.5V) is compatible with standard 5V regulated supplies.

Q: What is the difference between receiver hysteresis values, and does it affect substitution?

A: Receiver hysteresis determines the voltage difference required between high and low logic thresholds. The original part specifies 100 mV. Substitutes range from 50 mV to 120 mV. Lower hysteresis (50 mV) increases sensitivity but may be susceptible to noise; higher hysteresis (120 mV) provides better noise immunity. Selection depends on signal integrity in the application.

Q: Why is AM26LS32ACN recommended over other active products?

A: AM26LS32ACN maintains active product status, ensuring continued manufacturing and availability. It provides full RS422/RS423 protocol support, identical packaging, and compatible electrical specifications. These factors make it the most reliable long-term replacement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance of the original DS26LS32CN/NOPB.

Q: Can I use SN75ALS193N if my application requires RS422/RS423 support?

A: Yes. SN75ALS193N explicitly supports RS422 and RS423 protocols and is an active product. The higher receiver hysteresis (120 mV) may provide improved performance in electrically noisy environments.

Q: What should I consider when selecting between active and obsolete substitute parts?

A: Active products (AM26LS32ACN, SN75ALS193N) are recommended for new designs due to guaranteed long-term availability and manufacturing support. Obsolete parts should be used only for legacy system maintenance or when specific performance characteristics are required and inventory is confirmed available.