MAX208CDWR Equivalent & Substitute Parts

Part Overview

The MAX208CDWR is a 4/4 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 24-SOIC package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MAX208CDWR operates within a 4.5V to 5.5V supply range with a 120 kbps data rate and 500 mV receiver hysteresis, serving as a standard interface solution for RS232 serial communication applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX208CDWR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	4/4
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	120 kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX208CDWR is determined by the following critical parameters:

Electrical Compatibility: RS232 protocol, 4/4 driver/receiver configuration, full-duplex operation, 4.5V to 5.5V supply voltage, and 120 kbps minimum data rate capability.

Mechanical Compatibility: 24-SOIC package format with 0.295" (7.50mm) width ensures pin-to-pin and footprint compatibility.

Operational Constraints: Operating temperature range, receiver hysteresis tolerance, and data rate specifications determine functional equivalence.

Compliance & Status: RoHS3 compliance and MSL rating ensure regulatory and manufacturing process compatibility.

Substitute parts are grouped into three categories:

Parametric Equivalents: Identical electrical and mechanical specifications with matching operating temperature and hysteresis parameters.
Direct Equivalents: Same package and electrical function with extended operating temperature ranges or enhanced data rates.
Manufacturer-Recommended Alternatives: Parts from alternative manufacturers meeting core electrical and mechanical requirements with potential variations in secondary parameters.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temperature	Package	Product Status
MAX208CDWR	Texas Instruments	RS232	4/4	120 kbps	500 mV	0°C ~ 70°C	24-SOIC	Obsolete
TRS208IDBR	Texas Instruments	RS232	4/4	120 kbps	500 mV	-40°C ~ 85°C	24-SSOP	Active
TRS208CDWR	Texas Instruments	RS232	4/4	120 kbps	500 mV	0°C ~ 70°C	24-SOIC	Obsolete
MAX208ECWG+	Analog Devices Inc./Maxim Integrated	RS232	4/4	120 kbps	500 mV	0°C ~ 70°C	24-SOIC	Active
MAX208EEWG+T	Analog Devices Inc./Maxim Integrated	RS232	4/4	120 kbps	500 mV	-40°C ~ 85°C	24-SOIC	Active
ADM208ARZ	Analog Devices Inc.	RS232	4/4	120 kbps	650 mV	-40°C ~ 85°C	24-SOIC	Active
ADM208ARZ-REEL	Analog Devices Inc.	RS232	4/4	120 kbps	650 mV	-40°C ~ 85°C	24-SOIC	Active
ADM208EARZ	Analog Devices Inc.	RS232	4/4	230 kbps	650 mV	-40°C ~ 85°C	24-SOIC	Active
ADM208EARZ-REEL	Analog Devices Inc.	RS232	4/4	230 kbps	650 mV	-40°C ~ 85°C	24-SOIC	Active
HIN208ECBZ	Renesas Electronics Corporation	RS232	4/4	230 kbps	500 mV	0°C ~ 70°C	24-SOIC	Active
HIN208ECBZ-T	Renesas Electronics Corporation	RS232	4/4	230 kbps	500 mV	0°C ~ 70°C	24-SOIC	Active

Engineering Selection Recommendations

For Direct Replacement (Same Operating Temperature Range):

MAX208ECWG+ and HIN208ECBZ maintain the 0°C to 70°C operating temperature specification of the original MAX208CDWR. Both are active products with ROHS3 compliance and MSL-1 or MSL-3 ratings. MAX208ECWG+ is manufactured by Analog Devices Inc./Maxim Integrated, while HIN208ECBZ is from Renesas Electronics Corporation. Both support the required 4/4 RS232 transceiver configuration in 24-SOIC packaging.

For Extended Temperature Applications:

MAX208EEWG+T, ADM208ARZ, ADM208ARZ-REEL, ADM208EARZ, and ADM208EARZ-REEL extend the operating temperature range to -40°C to 85°C. These parts are suitable for industrial and automotive environments requiring broader thermal performance. All maintain ROHS3 compliance and MSL-1 ratings.

For Enhanced Data Rate Requirements:

ADM208EARZ, ADM208EARZ-REEL, HIN208ECBZ, and HIN208ECBZ-T support 230 kbps data rates, exceeding the original 120 kbps specification. These parts are backward compatible with lower data rate applications while providing headroom for future bandwidth requirements.

Package Consideration:

TRS208IDBR uses a 24-SSOP package (0.209", 5.30mm width) instead of 24-SOIC, requiring PCB layout modification. This part is suitable only when board redesign is acceptable.

All substitute parts maintain ROHS3 compliance and are classified as active products, ensuring long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can I use TRS208IDBR as a direct replacement for MAX208CDWR?

A: TRS208IDBR is electrically equivalent but uses a 24-SSOP package instead of 24-SOIC. This requires PCB footprint redesign and is not a pin-compatible replacement. Use only if board layout modification is feasible.

Q: What is the difference between ADM208ARZ and ADM208EARZ?

A: Both are Analog Devices parts in 24-SOIC packaging with 650 mV receiver hysteresis and -40°C to 85°C operating temperature. ADM208EARZ supports 230 kbps data rate compared to 120 kbps for ADM208ARZ. ADM208EARZ is suitable for higher-speed applications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. Moisture sensitivity levels vary: MAX208 and ADM208 series are MSL-1 (unlimited), while HIN208 series is MSL-3 (168 hours). Verify MSL requirements for your manufacturing process.

Q: Can I use a part with 650 mV receiver hysteresis instead of 500 mV?

A: Receiver hysteresis affects noise immunity and signal detection thresholds. Parts with 650 mV hysteresis (ADM208 series) provide higher noise immunity but may require signal level verification in your application. Confirm compatibility with your RS232 signal levels before substitution.

Q: Which substitute offers the best long-term availability?

A: MAX208ECWG+, MAX208EEWG+T, ADM208ARZ, ADM208EARZ, HIN208ECBZ, and HIN208ECBZ-T are all active products with confirmed inventory. Texas Instruments and Analog Devices are primary manufacturers with established supply chains. Renesas HIN208 series provides an alternative source.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (ARZ, ECBZ) is suitable for manual assembly or low-volume production. Tape & Reel packaging (ARZ-REEL, EEWG+T, ECBZ-T) is optimized for automated pick-and-place assembly. Select based on your manufacturing process requirements.

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