DS14C89AMX RS232 Receiver Interface IC Equivalent & Substitute Parts

Part Overview

The DS14C89AMX is a 0/4 RS232 receiver interface IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates across 5V and 12V supply voltages with a 1V receiver hysteresis specification, designed for RS232 serial communication applications requiring receiver functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	DS14C89AMX
Manufacturer	Texas Instruments
Category	Interface
Type	Receiver
Protocol	RS232
Number of Drivers/Receivers	0/4
Receiver Hysteresis	1 V
Voltage - Supply	5V, 12V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DS14C89AMX is determined by the following critical parameters:

Protocol compatibility: RS232
Receiver configuration: 0/4 (four receivers, no drivers)
Package type: 14-SOIC surface mount
Physical dimensions: 0.154" width, 3.90mm
Receiver hysteresis: 1V nominal specification
Supply voltage compatibility: 5V and 12V operation

Substitute parts must maintain identical receiver count, package footprint, and RS232 protocol compliance. Variations in supply voltage range, operating temperature, and receiver hysteresis within acceptable tolerances do not preclude substitution. Product status and RoHS compliance are secondary considerations for component selection but are documented for procurement and regulatory purposes.

Parameter Comparison

Parameter	DS14C89AMX	DS14C89AM/NOPB	DS14C89AMX/NOPB	MAX1489ECSD+	MAX1489ECSD+T	MAX1489EESD+	MAX1489EESD+T
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Type	Receiver	Receiver	Receiver	Receiver	Receiver	Receiver	Receiver
Protocol	RS232	RS232	RS232	RS232	RS232	RS232	RS232
Number of Drivers/Receivers	0/4	0/4	0/4	0/4	0/4	0/4	0/4
Receiver Hysteresis	1 V	1 V	1 V	1.11 V	1.11 V	1.11 V	1.11 V
Voltage - Supply	5V, 12V	5V, 12V	5V, 12V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Data Rate	—	—	—	120Kbps	120Kbps	120Kbps	120Kbps
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using DS14C89AMX, the following selection criteria apply:

Texas Instruments DS14C89 Series (Direct Manufacturer Equivalents): DS14C89AMX/NOPB is the active product status equivalent with identical electrical specifications and 14-SOIC packaging. This part maintains full parametric compatibility and is available in Tape & Reel packaging. DS14C89AM/NOPB provides an obsolete-status alternative in Tube packaging with ROHS3 compliance.

Analog Devices Inc./Maxim Integrated MAX1489 Series (Cross-Manufacturer Substitutes): The MAX1489ECSD+, MAX1489ECSD+T, MAX1489EESD+, and MAX1489EESD+T parts are active-status alternatives with identical receiver configuration and 14-SOIC packaging. These parts operate within a narrower supply voltage range (4.5V ~ 5.5V) compared to the DS14C89AMX specification of 5V and 12V. The MAX1489EESD+ and MAX1489EESD+T variants extend operating temperature to -40°C ~ 85°C, providing enhanced thermal performance for extended-range applications. All MAX1489 variants specify 120Kbps data rate and 1.11V receiver hysteresis.

Applications requiring 12V supply operation must use Texas Instruments DS14C89 series parts. Applications limited to 5V operation may use either Texas Instruments or Maxim Integrated parts. ROHS3 compliance is available across all active-status alternatives.

Frequently Asked Questions (FAQ)

Q: Can MAX1489 parts replace DS14C89AMX in 12V supply applications? A: No. MAX1489 parts specify 4.5V ~ 5.5V supply voltage operation. DS14C89AMX supports both 5V and 12V supplies. For 12V applications, use DS14C89AMX/NOPB or DS14C89AM/NOPB.

Q: What is the difference between MAX1489ECSD+ and MAX1489EESD+ variants? A: Operating temperature range differs. MAX1489ECSD+ operates 0°C ~ 70°C. MAX1489EESD+ operates -40°C ~ 85°C. Both maintain identical receiver hysteresis (1.11V), data rate (120Kbps), and supply voltage (4.5V ~ 5.5V) specifications.

Q: Are packaging differences between Tube, Tape & Reel, and Cut Tape significant for substitution? A: Packaging affects procurement and handling but does not impact electrical or mechanical compatibility. All 14-SOIC packages are footprint-identical. Select packaging based on assembly process requirements and inventory management.

Q: Does receiver hysteresis variation between 1V (DS14C89) and 1.11V (MAX1489) affect circuit operation? A: Receiver hysteresis determines input threshold switching characteristics. The 0.11V difference is within typical RS232 receiver tolerance and does not preclude substitution for standard RS232 communication applications.

Q: Is RoHS compliance required for DS14C89AMX substitution? A: RoHS compliance is a regulatory and procurement consideration, not an electrical substitution criterion. Active-status alternatives (DS14C89AMX/NOPB, MAX1489 series) are ROHS3 compliant. Legacy applications may continue using RoHS non-compliant parts where regulatory requirements permit.

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