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SP3494CN-L Equivalent & Substitute Parts
Part Overview
The SP3494CN-L is a half-duplex RS422/RS485 transceiver interface IC manufactured by MaxLinear, Inc., housed in an 8-SOIC surface mount package. This device is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates at 3V to 3.6V supply voltage with a 2.5 Mbps data rate and is RoHS compliant with MSL-1 moisture sensitivity rating.
Substiute Parts
Key Parameters
| Parameter | SP3494CN-L |
|---|---|
| Manufacturer | MaxLinear, Inc. |
| Type | Transceiver Half Duplex |
| Protocol | RS422, RS485 |
| Drivers/Receivers | 1/1 |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Voltage Supply | 3V ~ 3.6V |
| Data Rate | 2.5 Mbps |
| Receiver Hysteresis | 20 mV |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS Compliant |
| MSL Rating | 1 (Unlimited) |
| Product Status | Discontinued |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict parameter matching across the following critical criteria:
- Protocol compatibility: RS422/RS485 half-duplex operation
- Electrical interface: 1 driver / 1 receiver configuration
- Package form factor: 8-SOIC surface mount only
- Supply voltage range: 3V to 3.6V operation
- Pin-compatible footprint: 0.154" width, 3.90mm standard
Substitute parts are grouped by data rate capability and operating temperature range. Parts with lower data rates (250 kbps, 500 kbps) are electrically compatible with the SP3494CN-L's 2.5 Mbps specification due to backward compatibility in RS422/RS485 protocol implementation. Extended temperature variants (-40°C to 125°C) provide broader operational envelope while maintaining core electrical compatibility.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Data Rate | Voltage Supply | Receiver Hysteresis | Operating Temp | Package | Product Status | RoHS | MSL |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SP3494CN-L | MaxLinear | RS422/RS485 | 1/1 | 2.5 Mbps | 3V ~ 3.6V | 20 mV | 0°C ~ 70°C | 8-SOIC | Discontinued | RoHS | 1 |
| ISL83483IBZ | Renesas | RS422/RS485 | 1/1 | 250 kbps | 3V ~ 3.6V | 50 mV | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 | 3 |
| ISL83483IBZ-T | Renesas | RS422/RS485 | 1/1 | 250 kbps | 3V ~ 3.6V | 50 mV | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 | 3 |
| ADM3072EARZ | Analog Devices | RS422/RS485 | 1/1 | 250 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3072EARZ-REEL7 | Analog Devices | RS422/RS485 | 1/1 | 250 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3072EYRZ | Analog Devices | RS422/RS485 | 1/1 | 250 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 125°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3072EYRZ-REEL7 | Analog Devices | RS422/RS485 | 1/1 | 250 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 125°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3075EARZ | Analog Devices | RS422/RS485 | 1/1 | 500 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3075EARZ-REEL7 | Analog Devices | RS422/RS485 | 1/1 | 500 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3075EYRZ | Analog Devices | RS422/RS485 | 1/1 | 500 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 125°C | 8-SOIC | Active | ROHS3 | 1 |
| ADM3075EYRZ-REEL7 | Analog Devices | RS422/RS485 | 1/1 | 500 kbps | 3V ~ 3.6V | 100 mV | -40°C ~ 125°C | 8-SOIC | Active | ROHS3 | 1 |
Engineering Selection Recommendations
All listed substitute parts maintain active product status with current manufacturer support, ensuring long-term availability and supply chain stability. The Analog Devices ADM3072 and ADM3075 series are manufacturer-recommended alternatives, offering ROHS3 compliance and MSL-1 moisture sensitivity equivalent to the original SP3494CN-L specification.
For applications requiring extended temperature operation beyond 70°C, ADM3072EYRZ, ADM3072EYRZ-REEL7, ADM3075EYRZ, and ADM3075EYRZ-REEL7 variants support -40°C to 125°C range. For standard industrial temperature requirements (-40°C to 85°C), all ADM3072 and ADM3075 variants provide suitable alternatives.
Renesas ISL83483IBZ and ISL83483IBZ-T parts are electrically compatible but feature MSL-3 moisture sensitivity rating, requiring extended bake-out procedures in high-humidity manufacturing environments. These parts are suitable for applications with standard moisture control protocols.
Packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) are available across all substitute families to match existing procurement and assembly workflows.
Frequently Asked Questions (FAQ)
Q: Can I use a 250 kbps rated part in place of the 2.5 Mbps SP3494CN-L?
A: Yes. RS422/RS485 transceivers with lower data rate specifications are backward compatible with higher-speed applications. The 250 kbps and 500 kbps rated parts operate correctly at the SP3494CN-L's 2.5 Mbps data rate due to protocol architecture. Verify application timing margins if operating near maximum specified data rates.
Q: What is the difference between ADM3072 and ADM3075 series?
A: Both are manufacturer-recommended substitutes with identical electrical interfaces and packaging. The primary difference is data rate specification: ADM3072 is rated for 250 kbps, while ADM3075 is rated for 500 kbps. Both operate correctly at the SP3494CN-L's 2.5 Mbps specification.
Q: Are the Renesas ISL83483 parts pin-compatible with SP3494CN-L?
A: Yes. ISL83483IBZ and ISL83483IBZ-T maintain identical 8-SOIC pinout and electrical interface. The primary consideration is MSL-3 moisture sensitivity versus the original MSL-1 rating, requiring appropriate handling procedures during assembly.
Q: What does the suffix difference mean (EARZ vs EYRZ vs IBZ)?
A: Suffixes indicate temperature grade and packaging configuration. EARZ and EYRZ are Analog Devices designations for different temperature ranges (-40°C to 85°C and -40°C to 125°C respectively). IBZ is the Renesas designation. All maintain 8-SOIC package compatibility.
Q: Can I mix packaging types in production?
A: Yes. Tube, Cut Tape & Digi-Reel, and Tape & Reel variants of the same part number are electrically and functionally identical. Packaging selection depends on assembly equipment compatibility and procurement volume requirements.
Q: Is RoHS3 compliance equivalent to RoHS compliance?
A: RoHS3 represents current RoHS directive compliance with updated substance restrictions. Parts marked RoHS3 are suitable for applications requiring RoHS compliance. The original SP3494CN-L RoHS marking is superseded by ROHS3 compliance in all active substitute parts.
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