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MAX488ESA RS422/RS485 Transceiver Equivalent & Substitute Parts
Part Overview
The MAX488ESA 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, making identification of equivalent and substitute components essential for ongoing system support, design updates, and procurement continuity. Active alternatives with identical or compatible electrical and mechanical specifications are available from multiple manufacturers.
Substiute Parts
Key Parameters
| Parameter | MAX488ESA |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| 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 | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution of the MAX488ESA is determined by strict equivalence across the following critical parameters:
Primary Substitution Criteria:
- Protocol: RS422/RS485 full-duplex operation
- Number of Drivers/Receivers: 1/1 configuration
- Duplex Mode: Full-duplex capability
- Package Type: 8-SOIC form factor (0.154", 3.90mm Width)
- Mounting Type: Surface mount
- Receiver Hysteresis: 70 mV (parametric equivalent) or 150 mV (functional equivalent with higher noise immunity)
- Data Rate: 250 kbps or higher
- Supply Voltage Range: Minimum 4.5V to 5.5V compatibility
- Operating Temperature: -40°C to 85°C minimum range
- Compliance: ROHS3, REACH Unaffected, MSL 1
Substitution Categories:
-
Parametric Equivalents (Identical Specifications): MAX488ESA+, MAX488EESA+ — Same manufacturer, identical electrical and mechanical specifications, active product status.
-
Manufacturer Recommended Alternatives (Analog Devices): ADM488ABRZ, ADM488ABRZ-REEL7, ADM488ARZ-REEL, ADM488ARZ-REEL7 — Expanded supply voltage range (4.5V ~ 5.5V), identical protocol and package, active status.
-
Cross-Manufacturer Alternatives: DS8921ATM/NOPB (Texas Instruments), LTC2863CS8-1#PBF, LTC2863CS8-1#TRPBF, LTC2863CS8-2#PBF (Analog Devices) — Functionally equivalent with variations in receiver hysteresis and data rate specifications.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Protocol | Drivers/Receivers | Receiver Hysteresis | Data Rate | Supply Voltage | Operating Temp | Package | Packaging Type |
|---|---|---|---|---|---|---|---|---|---|---|
| MAX488ESA | Analog Devices/Maxim | Obsolete | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Tube |
| MAX488ESA+ | Analog Devices/Maxim | Active | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Tube |
| MAX488EESA+ | Analog Devices/Maxim | Active | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Tube |
| ADM488ABRZ | Analog Devices | Active | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Tube |
| ADM488ABRZ-REEL7 | Analog Devices | Active | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Tape & Reel |
| ADM488ARZ-REEL | Analog Devices | Active | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Cut Tape & Digi-Reel |
| ADM488ARZ-REEL7 | Analog Devices | Active | RS422, RS485 | 1/1 | 70 mV | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Cut Tape & Digi-Reel |
| DS8921ATM/NOPB | Texas Instruments | Active | RS422, RS485 | 1/1 | 70 mV | Not specified | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Tube |
| LTC2863CS8-1#PBF | Analog Devices | Active | RS422, RS485 | 1/1 | 150 mV | 20 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 8-SOIC | Tube |
| LTC2863CS8-1#TRPBF | Analog Devices | Active | RS422, RS485 | 1/1 | 150 mV | 20 Mbps | 3V ~ 5.5V | 0°C ~ 70°C | 8-SOIC | Tape & Reel |
| LTC2863CS8-2#PBF | Analog Devices | Active | RS422, RS485 | 1/1 | 150 mV | 250 kbps | 3V ~ 5.5V | 0°C ~ 70°C | 8-SOIC | Tube |
Engineering Selection Recommendations
Direct Replacement (Parametric Equivalents): MAX488ESA+ and MAX488EESA+ are direct parametric equivalents with identical electrical specifications and active product status. Both are ROHS3 compliant and REACH unaffected. These parts are recommended for applications requiring exact specification matching and are available in higher quantities.
Recommended Alternatives (Analog Devices ADM488 Series): The ADM488ABRZ, ADM488ABRZ-REEL7, ADM488ARZ-REEL, and ADM488ARZ-REEL7 variants offer expanded supply voltage tolerance (4.5V ~ 5.5V versus 4.75V ~ 5.25V), maintaining identical protocol, duplex mode, receiver hysteresis, data rate, and operating temperature specifications. All variants are active, ROHS3 compliant, and REACH unaffected. Packaging options include tube, tape & reel, and cut tape formats for procurement flexibility.
Cross-Manufacturer Alternative: DS8921ATM/NOPB (Texas Instruments) provides functional equivalence with identical receiver hysteresis (70 mV), duplex mode, driver/receiver configuration, and operating temperature range. Supply voltage range is 4.5V ~ 5.5V. Data rate is not specified but the part maintains RS422/RS485 protocol compatibility in the 8-SOIC package.
Extended Performance Alternative: LTC2863CS8-2#PBF maintains the 250 kbps data rate specification with expanded supply voltage range (3V ~ 5.5V) and higher receiver hysteresis (150 mV) for improved noise immunity. Operating temperature range is 0°C ~ 70°C. This part is suitable for applications with relaxed temperature requirements and lower supply voltage operation.
High-Speed Alternative: LTC2863CS8-1#PBF and LTC2863CS8-1#TRPBF support 20 Mbps data rates with 150 mV receiver hysteresis and 3V ~ 5.5V supply voltage range. These parts are appropriate for applications requiring higher data throughput than the 250 kbps specification of the MAX488ESA.
Frequently Asked Questions (FAQ)
Q: Can MAX488ESA+ be used as a direct replacement for MAX488ESA? A: Yes. MAX488ESA+ is a parametric equivalent with identical electrical and mechanical specifications, including protocol (RS422/RS485), duplex mode (full), receiver hysteresis (70 mV), data rate (250 kbps), supply voltage (4.75V ~ 5.25V), operating temperature (-40°C ~ 85°C), and 8-SOIC package. The primary difference is active product status versus obsolete status.
Q: What is the difference between ADM488ABRZ and MAX488ESA? A: The ADM488ABRZ maintains identical protocol, duplex mode, receiver hysteresis, data rate, operating temperature, and package specifications. The key difference is expanded supply voltage tolerance: ADM488ABRZ operates at 4.5V ~ 5.5V compared to MAX488ESA at 4.75V ~ 5.25V. This provides greater flexibility in power supply design while maintaining full functional compatibility.
Q: Are LTC2863 parts compatible with MAX488ESA applications? A: LTC2863 parts maintain RS422/RS485 protocol, 1/1 driver/receiver configuration, full-duplex operation, and 8-SOIC packaging. However, they differ in receiver hysteresis (150 mV versus 70 mV), data rate (20 Mbps or 250 kbps variants versus 250 kbps), supply voltage range (3V ~ 5.5V versus 4.75V ~ 5.25V), and operating temperature (0°C ~ 70°C versus -40°C ~ 85°C). Compatibility depends on application-specific requirements for these parameters.
Q: What packaging options are available for ADM488 alternatives? A: ADM488ABRZ is supplied in tube packaging. ADM488ABRZ-REEL7 and ADM488ARZ-REEL7 are supplied in tape & reel format. ADM488ARZ-REEL is supplied in cut tape & Digi-Reel format. Selection depends on procurement volume and assembly line requirements.
Q: Is the DS8921ATM/NOPB suitable for MAX488ESA replacement? A: DS8921ATM/NOPB from Texas Instruments maintains identical receiver hysteresis (70 mV), duplex mode (full), driver/receiver configuration (1/1), operating temperature range (-40°C ~ 85°C), and 8-SOIC package. Supply voltage range is 4.5V ~ 5.5V. Data rate is not specified in the provided parameters. Functional compatibility is established for RS422/RS485 applications within these specifications.
Q: Why does MAX488EESA+ have different inventory than MAX488ESA+? A: MAX488EESA+ and MAX488ESA+ are parametric equivalents with identical electrical specifications. Inventory differences reflect independent supply chain management and procurement patterns. Both parts are active and suitable for direct replacement applications.
Q: Can LTC2863CS8-1#PBF replace MAX488ESA in high-speed applications? A: LTC2863CS8-1#PBF supports 20 Mbps data rates compared to MAX488ESA at 250 kbps, providing higher throughput capability. However, operating temperature range is limited to 0°C ~ 70°C versus -40°C ~ 85°C. Substitution is appropriate only for applications within the 0°C ~ 70°C temperature range that require data rates up to 20 Mbps.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the MAX488ESA.
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