DS36954M Equivalent & Substitute Parts

Part Overview

The DS36954M is a half-duplex RS422/RS485 transceiver interface IC manufactured by Texas Instruments, housed in a 20-SOIC surface mount package. This device integrates 4 drivers and 4 receivers for bidirectional serial communication in industrial and telecommunications applications. The DS36954M is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across supply voltage, operating temperature, protocol support, and package specifications.

Substiute Parts

DS36954M

Texas InstrumentsIn Stock: 1284DS36954M Datasheet

Current PartRFQ

DS36954M/NOPB

National SemiconductorIn Stock: 2293DS36954M/NOPB Datasheet

DirectRFQ

SN75ALS170ADW

Texas InstrumentsIn Stock: 4397SN75ALS170ADW Datasheet

Parametric EquivalentRFQ

SN75ALS170DW

Texas InstrumentsIn Stock: 1199SN75ALS170DW Datasheet

Parametric EquivalentRFQ

SN75ALS171ADW

Texas InstrumentsIn Stock: 1965SN75ALS171ADW Datasheet

Parametric EquivalentRFQ

SN75ALS171DW

Texas InstrumentsIn Stock: 2282SN75ALS171DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS36954M are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalent (Functional Replacement): DS36954M/NOPB maintains identical electrical specifications: 4/4 driver/receiver configuration, 60 mV receiver hysteresis, 4.75V–5.25V supply voltage range, 0°C–70°C operating temperature, and 20-SOIC package. This part is manufactured by National Semiconductor and carries Active product status, making it the primary direct substitute.

Parametric Equivalent (Functional Adaptation Required): SN75ALS170ADW, SN75ALS170DW, SN75ALS171ADW, and SN75ALS171DW are parametric equivalents manufactured by Texas Instruments. These parts share identical supply voltage (4.75V–5.25V), operating temperature (0°C–70°C), receiver hysteresis (60 mV), protocol support (RS422/RS485), duplex mode (Half), mounting type (Surface Mount), and package specification (20-SOIC). The critical difference is the driver/receiver configuration: these substitutes provide 3/3 drivers and receivers instead of 4/4. Substitution is valid only when circuit design accommodates reduced driver/receiver count.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (4/4 Driver/Receiver Requirement): DS36954M/NOPB is the appropriate selection when the circuit design requires 4 independent drivers and 4 independent receivers. This part maintains full electrical and functional equivalence to the DS36954M while offering Active product status, ensuring continued availability and supply chain stability.

For Parametric Substitution (3/3 Driver/Receiver Acceptable): When circuit design accommodates 3 drivers and 3 receivers, the SN75ALS170 and SN75ALS171 series provide viable alternatives. SN75ALS170DW and SN75ALS171DW are preferred due to Active product status. SN75ALS170ADW and SN75ALS171ADW are available but SN75ALS171ADW carries Obsolete status. All four parametric equivalents offer improved compliance: ROHS3 Compliant status and MSL 1 (Unlimited) versus the DS36954M's RoHS non-compliant status and MSL 2A (4 Weeks).

Compliance Considerations: If RoHS3 compliance is required, parametric equivalents (SN75ALS170ADW, SN75ALS170DW, SN75ALS171ADW, SN75ALS171DW) are mandatory. The DS36954M and DS36954M/NOPB do not meet this requirement.

Frequently Asked Questions (FAQ)

Q: Can DS36954M/NOPB be used as a direct replacement for DS36954M? A: Yes. DS36954M/NOPB maintains identical electrical specifications, package, and functional configuration (4/4 drivers/receivers). The primary advantage is Active product status, ensuring supply availability.

Q: What is the key difference between DS36954M and the SN75ALS170/SN75ALS171 series? A: The driver/receiver count differs: DS36954M provides 4/4 configuration, while SN75ALS170 and SN75ALS171 provide 3/3 configuration. All other electrical parameters—supply voltage, operating temperature, receiver hysteresis, protocol support, and package—are identical.

Q: Can SN75ALS170DW replace DS36954M in any application? A: SN75ALS170DW can replace DS36954M only if the circuit design uses 3 or fewer independent drivers and 3 or fewer independent receivers. If the application requires all 4 drivers and 4 receivers, substitution is not valid.

Q: What are the compliance advantages of SN75ALS170 and SN75ALS171 parts? A: These parts are ROHS3 Compliant with MSL 1 (Unlimited), compared to DS36954M's RoHS non-compliant status and MSL 2A (4 Weeks). This provides improved environmental compliance and extended shelf life without moisture sensitivity constraints.

Q: Are there any packaging differences between substitute parts? A: No. All parts—DS36954M, DS36954M/NOPB, SN75ALS170ADW, SN75ALS170DW, SN75ALS171ADW, and SN75ALS171DW—use identical 20-SOIC surface mount packaging (0.295", 7.50mm Width).

Q: Which substitute part should be selected for new designs? A: For new designs requiring 4/4 driver/receiver configuration, DS36954M/NOPB is recommended due to Active status. For designs accommodating 3/3 configuration, SN75ALS170DW or SN75ALS171DW are preferred, offering Active status and ROHS3 compliance.