MAX488ECSA RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX488ECSA is a 1/1 full-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MAX488ECSA operates at 250 kbps data rate with a 4.75V to 5.25V supply voltage range and 0°C to 70°C operating temperature. Substitute parts must maintain functional equivalence in transceiver topology, protocol support, and electrical performance within the specified operating envelope.

Key Parameters

Parameter	MAX488ECSA
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	70 mV
Data Rate	250 kbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MAX488ECSA is determined by the following critical parameters:

Functional Requirements:

Protocol support: RS422 and RS485
Transceiver configuration: 1/1 (one driver, one receiver)
Duplex mode: Full-duplex operation
Package type: 8-SOIC surface mount

Electrical Compatibility:

Data rate capability: minimum 250 kbps
Receiver hysteresis: 70 mV nominal
Supply voltage range: must encompass or exceed 4.75V ~ 5.25V
Operating temperature: must support 0°C ~ 70°C minimum

Compliance & Status:

RoHS compliance status
Product availability and active status

Substitute parts are grouped into two categories: parametric equivalents (matching all electrical specifications) and manufacturer-recommended alternatives (offering enhanced specifications with broader operating ranges).

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Package	Product Status	RoHS Status
MAX488ECSA	Analog Devices/Maxim	RS422, RS485	1/1	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	8-SOIC	Obsolete	Non-compliant
MAX488CSA+	Analog Devices/Maxim	RS422, RS485	1/1	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	8-SOIC	Active	ROHS3 Compliant
MAX488ECSA+	Analog Devices/Maxim	RS422, RS485	1/1	250 kbps	4.75V ~ 5.25V	0°C ~ 70°C	70 mV	8-SOIC	Active	ROHS3 Compliant
ADM488ARZ-REEL	Analog Devices	RS422, RS485	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	70 mV	8-SOIC	Active	ROHS3 Compliant
ADM488ARZ-REEL7	Analog Devices	RS422, RS485	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	70 mV	8-SOIC	Active	ROHS3 Compliant
ISL8488EIBZA	Renesas Electronics	RS422, RS485	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	70 mV	8-SOIC	Active	ROHS3 Compliant
ISL8488EIBZA-T	Renesas Electronics	RS422, RS485	1/1	250 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	70 mV	8-SOIC	Active	ROHS3 Compliant
LTC2863CS8-1#PBF	Analog Devices	RS422, RS485	1/1	20 Mbps	3V ~ 5.5V	0°C ~ 70°C	150 mV	8-SOIC	Active	ROHS3 Compliant
LTC2863CS8-1#TRPBF	Analog Devices	RS422, RS485	1/1	20 Mbps	3V ~ 5.5V	0°C ~ 70°C	150 mV	8-SOIC	Active	ROHS3 Compliant
LTC2863CS8-2#PBF	Analog Devices	RS422, RS485	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	150 mV	8-SOIC	Active	ROHS3 Compliant
LTC2863CS8-2#TRPBF	Analog Devices	RS422, RS485	1/1	250 kbps	3V ~ 5.5V	0°C ~ 70°C	150 mV	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended for Pin-Compatible Replacement):

MAX488CSA+ and MAX488ECSA+ are direct parametric equivalents to the MAX488ECSA. Both maintain identical electrical specifications (250 kbps data rate, 70 mV receiver hysteresis, 4.75V ~ 5.25V supply, 0°C ~ 70°C operating range) and 8-SOIC packaging. Both parts are active products with ROHS3 compliance, eliminating the obsolescence and compliance issues of the original part.

Enhanced Operating Range Alternatives (Broader Environmental Specifications):

ADM488ARZ-REEL and ADM488ARZ-REEL7 (Analog Devices) and ISL8488EIBZA / ISL8488EIBZA-T (Renesas Electronics) offer extended operating temperature range (-40°C ~ 85°C) and expanded supply voltage range (4.5V ~ 5.5V) while maintaining the same 250 kbps data rate and 70 mV receiver hysteresis. These parts are suitable for applications requiring broader environmental tolerance. All are ROHS3 compliant and active products.

Higher Data Rate Alternatives (Enhanced Performance):

LTC2863CS8-1#PBF and LTC2863CS8-1#TRPBF support 20 Mbps data rate compared to the 250 kbps of the MAX488ECSA, providing significant performance headroom. LTC2863CS8-2#PBF and LTC2863CS8-2#TRPBF maintain the 250 kbps data rate. All LTC2863 variants feature wider supply voltage range (3V ~ 5.5V) and higher receiver hysteresis (150 mV). These parts are ROHS3 compliant and active.

Packaging Considerations:

MAX488CSA+ is supplied in Tube packaging. MAX488ECSA+ has unspecified packaging. ADM488ARZ-REEL and ADM488ARZ-REEL7 are supplied in Cut Tape & Digi-Reel format. ISL8488EIBZA is supplied in Tube; ISL8488EIBZA-T in Tape & Reel. LTC2863 variants are available in both Tube and Tape & Reel formats. Select packaging based on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX488CSA+ or MAX488ECSA+ be used as direct replacements for MAX488ECSA?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and 8-SOIC packaging. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Pin-to-pin compatibility is maintained.

Q: What is the difference between the ADM488ARZ variants and the original MAX488ECSA?

A: ADM488ARZ-REEL and ADM488ARZ-REEL7 maintain the same 250 kbps data rate and 70 mV receiver hysteresis but extend the operating temperature range to -40°C ~ 85°C and supply voltage to 4.5V ~ 5.5V. These enhancements provide broader environmental tolerance while maintaining functional equivalence. Packaging differs (Cut Tape & Digi-Reel vs. standard SOIC).

Q: Are the ISL8488EIBZA parts from Renesas compatible with MAX488ECSA designs?

A: Yes. ISL8488EIBZA and ISL8488EIBZA-T maintain the same 1/1 transceiver configuration, RS422/RS485 protocol support, 250 kbps data rate, and 70 mV receiver hysteresis. They offer extended operating temperature (-40°C ~ 85°C) and expanded supply voltage (4.5V ~ 5.5V). Moisture sensitivity level differs (MSL 3 vs. MSL 1), which may affect storage and handling requirements.

Q: Why do LTC2863 parts have higher receiver hysteresis (150 mV vs. 70 mV)?

A: The LTC2863 series is designed with higher receiver hysteresis to provide improved noise immunity in noisy environments. This parameter is provided in the datasheet and represents a design trade-off. Applications sensitive to hysteresis specifications should evaluate compatibility with their signal levels and noise environment.

Q: Can I use LTC2863CS8-1#PBF (20 Mbps) instead of LTC2863CS8-2#PBF (250 kbps)?

A: Both parts support the same 250 kbps data rate required by MAX488ECSA. The LTC2863CS8-1 variant is rated for 20 Mbps maximum, providing additional performance margin. Selection depends on application requirements and procurement availability. Both are functionally compatible with MAX488ECSA designs operating at 250 kbps.

Q: What is the significance of the "+" suffix in MAX488CSA+ and MAX488ECSA+?

A: The "+" suffix indicates RoHS3 compliance and active product status. These parts are the current production equivalents to the obsolete MAX488ECSA, with identical electrical specifications and packaging.

Q: How do packaging options (Tube, Cut Tape, Tape & Reel) affect part selection?

A: Packaging affects procurement quantity minimums, handling, and assembly line compatibility. Tube packaging is typical for smaller quantities. Cut Tape & Digi-Reel and Tape & Reel formats are standard for automated assembly. Select based on your procurement volume and assembly process requirements.

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