MAX211CDBR Equivalent & Substitute Parts

Part Overview

The MAX211CDBR is a 4/5 full-duplex RS232 transceiver in 28-SSOP surface mount packaging manufactured by Texas Instruments. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The MAX211CDBR operates within a 4.5V to 5.5V supply range with a 120Kbps data rate and 500mV receiver hysteresis, serving as a standard interface solution for RS232 serial communication applications.

Key Parameters

Parameter	Specification
Part Number	MAX211CDBR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	4/5
Duplex	Full
Data Rate	120Kbps
Supply Voltage	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	500mV
Package	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX211CDBR is determined by strict equivalence across the following critical parameters: RS232 protocol compliance, 4/5 driver/receiver configuration, full-duplex operation, 28-SSOP package geometry, 4.5V to 5.5V supply voltage range, 120Kbps data rate capability, and 500mV receiver hysteresis. Parts are grouped into the following categories:

MFR Recommended Substitute (Active Status): MAX211IDBR maintains identical electrical specifications and package form factor while offering active product status and extended operating temperature range (-40°C to 85°C).

Parametric Equivalents (Obsolete/Last Time Buy Status): MAX213CDBR and SN75LBC187DBR provide functional equivalence within the same parameter envelope, though MAX213CDBR maintains 4/5 configuration while SN75LBC187DBR operates as 3/5 driver/receiver.

Direct Equivalents (Active Status, Packaging Variants): MAX211ECAI+, MAX211EEAI+, and MAX211EEAI+T represent the same base product (MAX211) with active status across tube and cut tape packaging options, with temperature-extended variants available.

MFR Recommended Alternatives (Different Manufacturer): ADM211ARSZ, ADM211ARSZ-REEL, ADM211EARSZ, and ADM211EARSZ-REEL from Analog Devices Inc. provide 4/5 transceiver functionality with 650mV receiver hysteresis and active product status, available in multiple packaging configurations.

Parameter Comparison

Part Number	Manufacturer	Status	Drivers/Receivers	Hysteresis (mV)	Temp Range (°C)	Package	Packaging Type
MAX211CDBR	Texas Instruments	Obsolete	4/5	500	0 ~ 70	28-SSOP	Cut Tape & Digi-Reel
MAX211IDBR	Texas Instruments	Active	4/5	500	-40 ~ 85	28-SSOP	Cut Tape & Digi-Reel
MAX213CDBR	Texas Instruments	Obsolete	4/5	500	0 ~ 70	28-SSOP	Cut Tape & Digi-Reel
SN75LBC187DBR	Texas Instruments	Last Time Buy	3/5	500	0 ~ 70	28-SSOP	Cut Tape & Digi-Reel
MAX211ECAI+	Analog Devices Inc./Maxim Integrated	Active	4/5	500	0 ~ 70	28-SSOP	Tube
MAX211EEAI+	Analog Devices Inc./Maxim Integrated	Active	4/5	500	-40 ~ 85	28-SSOP	Tube
MAX211EEAI+T	Analog Devices Inc./Maxim Integrated	Active	4/5	500	-40 ~ 85	28-SSOP	Cut Tape & Digi-Reel
ADM211ARSZ	Analog Devices Inc.	Active	4/5	650	-40 ~ 85	28-SSOP	Tube
ADM211ARSZ-REEL	Analog Devices Inc.	Active	4/5	650	-40 ~ 85	28-SSOP	Cut Tape & Digi-Reel
ADM211EARSZ	Analog Devices Inc.	Active	4/5	650	-40 ~ 85	28-SSOP	Tube
ADM211EARSZ-REEL	Analog Devices Inc.	Active	4/5	650	-40 ~ 85	28-SSOP	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For applications requiring direct replacement of the MAX211CDBR with minimal design modification, MAX211IDBR is the primary recommendation. This part maintains identical electrical parameters and 28-SSOP package geometry while offering active product status and extended operating temperature range, ensuring long-term supply availability.

For designs operating within the original 0°C to 70°C temperature specification, MAX211ECAI+ provides an active-status alternative from Analog Devices Inc./Maxim Integrated with identical electrical characteristics and tube packaging. This option extends component lifecycle support beyond the obsolete MAX211CDBR.

For applications requiring extended temperature operation (-40°C to 85°C), MAX211EEAI+T offers active status with cut tape packaging compatible with automated assembly processes. This variant maintains 500mV receiver hysteresis and 4/5 driver/receiver configuration.

ADM211ARSZ and ADM211EARSZ variants from Analog Devices Inc. provide alternative sourcing with active product status and extended temperature range. The 650mV receiver hysteresis specification differs from the MAX211CDBR but remains within RS232 standard compliance. ADM211ARSZ-REEL and ADM211EARSZ-REEL variants accommodate cut tape packaging requirements.

SN75LBC187DBR operates as a 3/5 driver/receiver configuration and is suitable only for applications not requiring the fourth driver channel of the MAX211CDBR.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and identical supply voltage range (4.5V to 5.5V) and data rate (120Kbps) specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX211IDBR directly replace MAX211CDBR in existing designs?

A: Yes. MAX211IDBR maintains identical electrical specifications, 28-SSOP package geometry, and 4/5 driver/receiver configuration. The extended operating temperature range (-40°C to 85°C) versus the original 0°C to 70°C provides additional operational margin without requiring design changes.

Q: What is the significance of the receiver hysteresis difference between MAX211 and ADM211 variants?

A: The MAX211 series specifies 500mV receiver hysteresis while ADM211 variants specify 650mV. Both values comply with RS232 standard thresholds. The higher hysteresis in ADM211 devices provides increased noise immunity in electrically noisy environments but may affect timing-sensitive applications. Selection depends on specific application noise characteristics.

Q: Are tube and cut tape packaging variants electrically equivalent?

A: Yes. Tube packaging (MAX211ECAI+, MAX211EEAI+) and cut tape packaging (MAX211EEAI+T, ADM211ARSZ-REEL, ADM211EARSZ-REEL) contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements and handling procedures.

Q: Why is SN75LBC187DBR listed as a parametric equivalent if it has 3/5 drivers/receivers?

A: SN75LBC187DBR maintains identical RS232 protocol, 28-SSOP package, supply voltage, data rate, and receiver hysteresis specifications. The 3/5 configuration limits it to applications not requiring four independent driver channels. It is suitable only for designs utilizing three or fewer driver outputs.

Q: What is the impact of selecting an active-status part versus an obsolete part?

A: Active-status parts (MAX211IDBR, MAX211ECAI+, MAX211EEAI+, ADM211 variants) ensure long-term supply availability, ongoing manufacturing support, and compliance with current quality standards. Obsolete parts (MAX211CDBR, MAX213CDBR) face supply discontinuation and should be replaced in new designs or production runs.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All parts listed maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, ensuring compatibility with current manufacturing and environmental standards.

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