LMS202ECM RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The LMS202ECM is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This interface IC operates within the 4.5V to 5.5V supply voltage range and supports data rates up to 230 kbps with a receiver hysteresis of 600 mV. The LMS202ECM is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Key Parameters

Parameter	LMS202ECM Value
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	600 mV
Data Rate	230 kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LMS202ECM is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage - Supply: 4.5V ~ 5.5V
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Allowable Variation Parameters:

Receiver Hysteresis: 400 mV to 650 mV (LMS202ECM baseline: 600 mV)
Data Rate: 120 kbps to 230 kbps (LMS202ECM baseline: 230 kbps)
Operating Temperature: 0°C ~ 70°C or -40°C ~ 85°C (LMS202ECM baseline: 0°C ~ 70°C)
Product Status: Active substitutes preferred over obsolete
RoHS Status: ROHS3 Compliant substitutes available
Packaging Format: Tube, Cut Tape (CT) & Digi-Reel®

All substitute parts listed maintain functional equivalence within these defined parameters and are suitable for direct replacement in applications requiring RS232 2/2 transceiver functionality.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
LMS202ECM	Texas Instruments	RS232	2/2	Full	600 mV	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	RoHS non-compliant
ADM202EARNZ	Analog Devices Inc.	RS232	2/2	Full	650 mV	230 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	ROHS3 Compliant
ADM202EARNZ-REEL	Analog Devices Inc.	RS232	2/2	Full	650 mV	230 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	ROHS3 Compliant
ADM202EARNZ-REEL7	Analog Devices Inc.	RS232	2/2	Full	650 mV	230 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	ROHS3 Compliant
ADM202JRNZ	Analog Devices Inc.	RS232	2/2	Full	400 mV	—	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
ADM202JRNZ-REEL	Analog Devices Inc.	RS232	2/2	Full	400 mV	—	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
ADM202JRNZ-REEL7	Analog Devices Inc.	RS232	2/2	Full	400 mV	—	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
HIN202CBNZ	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
HIN202CBNZ-T	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	120 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
HIN202ECBNZ	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant
HIN202ECBNZ-T	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	230 kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Functional Replacement (Highest Compatibility): The ADM202EARNZ, ADM202EARNZ-REEL, and ADM202EARNZ-REEL7 from Analog Devices Inc. provide the closest electrical match to the LMS202ECM, maintaining 230 kbps data rate capability and 4.5V to 5.5V supply voltage operation. These parts are Active status and ROHS3 Compliant, offering improved environmental compliance over the obsolete LMS202ECM. The extended operating temperature range (-40°C to 85°C) provides additional thermal margin beyond the original 0°C to 70°C specification.

For Temperature-Matched Replacement (Operating Range 0°C ~ 70°C): The HIN202ECBNZ and HIN202ECBNZ-T from Renesas Electronics Corporation maintain the original operating temperature range while supporting 230 kbps data rate. These parts are Active status and ROHS3 Compliant. The 500 mV receiver hysteresis falls within the allowable substitution range.

For Cost-Optimized Selection (Lower Data Rate Applications): The HIN202CBNZ and HIN202CBNZ-T support 120 kbps data rate, suitable for applications not requiring the full 230 kbps capability. These parts maintain 0°C to 70°C operating temperature and are Active with ROHS3 Compliance.

For Temperature-Constrained Legacy Systems: The ADM202JRNZ, ADM202JRNZ-REEL, and ADM202JRNZ-REEL7 match the original 0°C to 70°C operating temperature range and are Active status with ROHS3 Compliance. The 400 mV receiver hysteresis is tighter than the original 600 mV specification, providing enhanced noise margin in certain applications.

All substitute parts maintain the critical 16-SOIC surface mount package format and 2/2 full-duplex RS232 transceiver functionality required for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can ADM202EARNZ replace LMS202ECM in all applications? A: The ADM202EARNZ maintains all critical electrical parameters: RS232 protocol, 2/2 transceiver configuration, full-duplex operation, 4.5V to 5.5V supply voltage, and 230 kbps data rate. The 16-SOIC package is identical. The extended operating temperature range (-40°C to 85°C) exceeds the original 0°C to 70°C specification. Substitution is valid for applications operating within 0°C to 70°C. Applications requiring operation below 0°C or above 70°C benefit from the extended range.

Q: What is the difference between ADM202EARNZ, ADM202EARNZ-REEL, and ADM202EARNZ-REEL7? A: These part numbers represent the same electrical device with different packaging formats. ADM202EARNZ is supplied in Tube packaging. ADM202EARNZ-REEL and ADM202EARNZ-REEL7 are supplied in Cut Tape (CT) & Digi-Reel® format. All three are electrically identical and functionally interchangeable. Selection depends on procurement and assembly requirements.

Q: Why do HIN202CBNZ and HIN202ECBNZ have different data rates? A: HIN202CBNZ supports 120 kbps data rate, while HIN202ECBNZ supports 230 kbps data rate. Both are RS232 2/2 transceivers in 16-SOIC packages. The HIN202ECBNZ is the appropriate substitute for LMS202ECM when 230 kbps operation is required. The HIN202CBNZ is suitable for applications with lower bandwidth requirements.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts listed are ROHS3 Compliant. The original LMS202ECM is RoHS non-compliant. Substitution with any listed part improves environmental compliance status.

Q: What is the significance of receiver hysteresis variation? A: Receiver hysteresis determines the voltage differential required for input signal transitions. The LMS202ECM specifies 600 mV. Substitute parts range from 400 mV to 650 mV. Lower hysteresis (400 mV) provides tighter input thresholds and enhanced noise immunity in certain signal conditions. Higher hysteresis (650 mV) may be more tolerant of slower signal rise times. All values within this range are functionally compatible for RS232 transceiver operation.

Q: Can I use HIN202CBNZ if my application only requires 120 kbps? A: Yes. The HIN202CBNZ is a valid substitute for applications operating at 120 kbps or lower data rates. It maintains all other critical parameters: RS232 protocol, 2/2 transceiver configuration, full-duplex operation, 4.5V to 5.5V supply voltage, 16-SOIC package, and 0°C to 70°C operating temperature. This part is Active status and ROHS3 Compliant.

Q: What packaging options are available for substitute parts? A: Substitute parts are available in two packaging formats: Tube and Cut Tape (CT) & Digi-Reel®. Tube packaging is standard for manual assembly and small-volume procurement. Cut Tape & Digi-Reel® format is optimized for automated pick-and-place assembly and high-volume production. Electrical specifications are identical across packaging formats.

Q: Is the 16-SOIC package identical across all parts? A: Yes. All parts, including the LMS202ECM and all substitutes, use the 16-SOIC (0.154", 3.90mm Width) surface mount package. Pin-to-pin compatibility is maintained, enabling direct PCB footprint reuse without layout modifications.

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