MAX488ESA-T RS422/RS485 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX488ESA-T is a 1/1 full-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated in an 8-SOIC surface mount package. This part is classified as obsolete, though 2200 units remain in stock as new original inventory. Given its obsolete status, identifying active equivalent and substitute parts is essential for ongoing design support, production continuity, and long-term component availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX488ESA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Category	Interface Transceiver
Protocol Support	RS422, RS485
Drivers/Receivers Configuration	1/1 (Full Duplex)
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Data Rate	250 kbps
Supply Voltage Range	4.75V ~ 5.25V
Operating Temperature Range	-40°C ~ 85°C
Receiver Hysteresis	70 mV
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAX488ESA-T is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Protocol support (RS422/RS485)
Drivers/Receivers configuration (1/1 full duplex)
Package type (8-SOIC)
Data rate capability (minimum 250 kbps)
Supply voltage compatibility
Operating temperature range coverage
RoHS and compliance certifications

Grouping Logic:

Group 1: Parametric Equivalents (MAX488 Series - Same Base Product) Parts MAX488EESA+T and MAX488ESA+T are parametric equivalents sharing identical electrical specifications with the main part. These differ only in product status (active vs. obsolete) and packaging format (Cut Tape & Digi-Reel vs. tube). All electrical parameters, including 250 kbps data rate, 4.75V–5.25V supply range, and 70 mV receiver hysteresis, remain unchanged.

Group 2: Manufacturer Recommended Alternatives (ADM488 Series) The ADM488ABRZ, ADM488ABRZ-REEL7, ADM488ARZ-REEL, and ADM488ARZ-REEL7 are manufacturer-recommended alternatives from Analog Devices. These maintain identical functional specifications (1/1 transceiver, RS422/RS485, 250 kbps, 8-SOIC package) with a slightly wider supply voltage range (4.5V–5.5V vs. 4.75V–5.25V). All parts are active and ROHS3 compliant.

Group 3: Higher-Performance Alternatives (LTC2863 Series) The LTC2863CS8 variants (LTC2863CS8-1#PBF, LTC2863CS8-1#TRPBF, LTC2863CS8-2#PBF, LTC2863CS8-2#TRPBF) are higher-performance alternatives supporting both 20 Mbps (CS8-1 variants) and 250 kbps (CS8-2 variants) data rates. These parts feature extended supply voltage range (3V–5.5V), wider operating temperature (0°C–70°C), and higher receiver hysteresis (150 mV). Package remains 8-SOIC. All are active and ROHS3 compliant.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Config (D/R)	Data Rate	Supply Voltage	Temp Range	Receiver Hysteresis	Package	RoHS
MAX488ESA-T	Analog Devices/Maxim	Obsolete	RS422/RS485	1/1	250 kbps	4.75V–5.25V	-40°C–85°C	70 mV	8-SOIC	ROHS3
MAX488EESA+T	Analog Devices/Maxim	Active	RS422/RS485	1/1	250 kbps	4.75V–5.25V	-40°C–85°C	70 mV	8-SOIC	ROHS3
MAX488ESA+T	Analog Devices/Maxim	Active	RS422/RS485	1/1	250 kbps	4.75V–5.25V	-40°C–85°C	70 mV	8-SOIC	ROHS3
ADM488ABRZ	Analog Devices	Active	RS422/RS485	1/1	250 kbps	4.5V–5.5V	-40°C–85°C	70 mV	8-SOIC	ROHS3
ADM488ABRZ-REEL7	Analog Devices	Active	RS422/RS485	1/1	250 kbps	4.5V–5.5V	-40°C–85°C	70 mV	8-SOIC	ROHS3
ADM488ARZ-REEL	Analog Devices	Active	RS422/RS485	1/1	250 kbps	4.5V–5.5V	-40°C–85°C	70 mV	8-SOIC	ROHS3
ADM488ARZ-REEL7	Analog Devices	Active	RS422/RS485	1/1	250 kbps	4.5V–5.5V	-40°C–85°C	70 mV	8-SOIC	ROHS3
LTC2863CS8-1#PBF	Analog Devices	Active	RS422/RS485	1/1	20 Mbps	3V–5.5V	0°C–70°C	150 mV	8-SOIC	ROHS3
LTC2863CS8-1#TRPBF	Analog Devices	Active	RS422/RS485	1/1	20 Mbps	3V–5.5V	0°C–70°C	150 mV	8-SOIC	ROHS3
LTC2863CS8-2#PBF	Analog Devices	Active	RS422/RS485	1/1	250 kbps	3V–5.5V	0°C–70°C	150 mV	8-SOIC	ROHS3
LTC2863CS8-2#TRPBF	Analog Devices	Active	RS422/RS485	1/1	250 kbps	3V–5.5V	0°C–70°C	150 mV	8-SOIC	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active): MAX488EESA+T and MAX488ESA+T are the primary choices for direct substitution. Both maintain identical electrical specifications and are active products with robust inventory availability (2600 and 23749 units respectively). These parts require no design modification and are fully compatible with existing MAX488ESA-T layouts and firmware.

For Expanded Supply Voltage Tolerance: The ADM488 series (ADM488ABRZ, ADM488ABRZ-REEL7, ADM488ARZ-REEL, ADM488ARZ-REEL7) are manufacturer-recommended alternatives offering a wider supply voltage window (4.5V–5.5V vs. 4.75V–5.25V). These are suitable for applications requiring greater power supply margin while maintaining identical functional performance. All variants are active with adequate inventory.

For Enhanced Performance Applications: The LTC2863CS8-2 variants (LTC2863CS8-2#PBF, LTC2863CS8-2#TRPBF) support the same 250 kbps data rate as the MAX488ESA-T while offering extended supply voltage range (3V–5.5V) and lower operating temperature floor (0°C). These are appropriate for applications requiring lower supply voltage operation or broader environmental tolerance. The LTC2863CS8-1 variants support 20 Mbps data rates for high-speed applications.

All substitute parts carry ROHS3 compliance and MSL-1 moisture sensitivity ratings, matching the original part's regulatory and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX488EESA+T and MAX488ESA+T be used interchangeably with MAX488ESA-T? A: Yes. Both parts are parametric equivalents with identical electrical specifications (250 kbps data rate, 4.75V–5.25V supply, 70 mV receiver hysteresis, 8-SOIC package). The only differences are product status (active vs. obsolete) and packaging format. No design changes are required.

Q: What is the key difference between MAX488 and ADM488 series? A: The ADM488 series provides a wider supply voltage range (4.5V–5.5V vs. 4.75V–5.25V). All other electrical parameters remain identical. The ADM488 is the manufacturer-recommended active alternative.

Q: When should I use LTC2863 instead of MAX488 or ADM488? A: Use LTC2863CS8-2 variants when your application requires lower supply voltage operation (down to 3V) or when you need higher receiver hysteresis (150 mV vs. 70 mV). The LTC2863CS8-1 variants support 20 Mbps data rates for high-speed RS422/RS485 applications. Standard 250 kbps applications should use MAX488 or ADM488 equivalents.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and MSL-1 moisture sensitivity ratings, matching the original MAX488ESA-T specifications.

Q: What packaging options are available for active equivalents? A: MAX488EESA+T and MAX488ESA+T are supplied in Cut Tape (CT) & Digi-Reel format. ADM488 variants are available in Tube (ABRZ) or Cut Tape & Digi-Reel (ARZ-REEL) formats. LTC2863 variants are available in Tube (#PBF) or Tape & Reel (#TRPBF) formats. Select packaging based on production volume and handling requirements.

Q: Is the 8-SOIC package identical across all substitute parts? A: Yes. All substitute parts use the same 8-SOIC package (0.154", 3.90mm width), ensuring PCB layout compatibility with the original MAX488ESA-T design.

Q: Can I mix different substitute parts in the same production run? A: Yes, provided your application operates within the overlapping parameter ranges. For standard 250 kbps RS422/RS485 applications with 4.75V–5.25V supply and -40°C–85°C temperature range, MAX488EESA+T, MAX488ESA+T, and all ADM488 variants are fully interchangeable. LTC2863 variants require application-specific evaluation due to different receiver hysteresis and temperature range specifications.

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