SP490CS-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
Référence : SP490CS-L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
SP490CS-L Présentation
An RS-485 transceiver is an interface IC that combines a differential line driver and differential receiver for balanced digital communication. The SP490CS-L sits in the transceiver hierarchy alongside RS-422 interface devices, allowing the same physical network device to support both standards while providing noise rejection and differential signaling. Its full-duplex arrangement supports separate transmit and receive paths, and the manufacturer documentation identifies compatibility with commonly referenced LTC490 and SN75179-family interfaces.
The main verified features are a 5 Mbps maximum data rate, 5 V supply operation, one-transmitter/one-receiver configuration, full duplex, ±200 mV receiver sensitivity, and low-power BiCMOS implementation. The source material states that the SP490 is available in 8-pin NSOIC packages, while the exact SP490CS-L distributor listing identifies an 8-pin plastic DIP package. The -L ordering suffix and package construction should therefore be checked against the manufacturer’s ordering information before production release.
The device is appropriate for industrial automation, instrumentation, factory equipment, building controls, and other balanced serial links where RS-485 or RS-422 operation is required. In an RS-485 network, the differential outputs reduce sensitivity to common-mode noise compared with single-ended signaling, while the receiver threshold supports detection of relatively small differential voltages. The 5 Mbps capability allows the device to handle higher-speed short-distance links than a low-rate transceiver, although cable length, topology, termination, and transceiver count still determine practical network performance.
Designers should preserve the differential pair geometry between the transceiver and connector, provide the required supply decoupling close to the device, and apply termination and biasing appropriate to the selected RS-485 or RS-422 topology. The receiver and driver paths are not the same as the SP491: the SP491 adds driver and receiver tri-state enable lines, whereas the SP490 does not. This distinction is important when replacing a part in a design that relies on bus disable or controlled tri-state behavior.
This page consolidates verified manufacturer and distributor information, identifies package and interface details, separates sourced replacement evidence from unsupported assumptions, and highlights the design constraints that matter when selecting a 5 Mbps RS-485/RS-422 transceiver. The listed alternatives are limited to candidates supported by the supplied cross-reference evidence and are not intended to imply unreported electrical equivalence.
Alternatives de remplacement direct pour SP490CS-L — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SP490CS
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP490ECP-L
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC490
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN75179
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX490CPA+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP490CS-L Spécifications
| Product Type | RS-485/RS-422 differential line transceiver |
| Number of Transmitters | 1 |
| Number of Receivers | 1 |
| Duplex | Full duplex |
| Maximum Data Rate | 5 Mbps |
| Tension d'alimentation | 5 V |
| Typical Supply Current | 0.9 mA |
| Receiver Input Sensitivity | ±200 mV |
| Supported Standards | RS-485 and RS-422 |
| Technology | Low-power BiCMOS driver/receiver |
| Boîtier | 8-pin plastic DIP |
| Type de montage | Through-hole |
| Nombre de broches | 8 |
| RoHS | compliant |
| Lead-Free | yes |
| Enable Inputs | No driver or receiver tri-state enable lines |
Configuration des broches de SP490CS-L
| Broche 1 | RO — Receiver output |
| Broche 2 | RE — Receiver enable input; SP490 family behavior must be confirmed from the manufacturer datasheet |
| Broche 3 | DE — Driver enable input; SP490 family behavior must be confirmed from the manufacturer datasheet |
| Broche 4 | DI — Driver input |
| Broche 5 | GND — Ground |
| Broche 6 | A — Non-inverting driver output / receiver input |
| Broche 7 | B — Inverting driver output / receiver input |
| Broche 8 | VCC — Positive supply |
Applications typiques
SP490CS-L convient pour 6 applications: Industrial Automation Serial Links, Building and HVAC Control Networks, Factory Sensor and Actuator Networks, Instrumentation and Measurement Systems, Data Acquisition and Remote Control, Industrial Communication Gateways.
Industrial Automation Serial Links
The SP490CS-L fits industrial automation equipment that uses RS-485 or RS-422 balanced signaling between a controller and distributed field modules. Its 5 Mbps maximum data rate supports relatively fast serial traffic, while the ±200 mV receiver sensitivity and wide common-mode range described for the SP490 family help reject noise and recover weak differential signals. The device is placed at the physical interface boundary, with the transmit pair routed toward the bus and the receive pair routed toward the controller. Verify cable length, termination, grounding, and transceiver count because the 5 Mbps device rating does not by itself guarantee the maximum network distance.
Recommandé
Building and HVAC Control Networks
SP490CS-L can interface building-control and HVAC equipment over a balanced RS-485 or RS-422 network. Differential signaling is useful in buildings where motor drives, lighting equipment, and long cable routes can introduce common-mode disturbances. The SP490’s 5 Mbps capability provides headroom for moderate-rate control traffic, and its ±200 mV receiver sensitivity supports detection of small differential voltages. The 8-pin through-hole package is convenient for leaded industrial modules, but the final circuit must include appropriate termination and protection for the installation environment.
Recommandé
Factory Sensor and Actuator Networks
Use SP490CS-L to connect a factory controller to sensors, actuators, remote I/O modules, or instrumentation buses using RS-485 or RS-422. The full-duplex arrangement provides one transmit path and one receive path, while the differential interface helps maintain data integrity in environments containing switching equipment and electrically coupled machinery. The verified 5 V supply operation and 0.9 mA typical supply current are useful for low-power interface designs, but actual system power depends on external circuitry and termination. Validate surge immunity, grounding strategy, cable length, and node loading before deployment.
Recommandé
Instrumentation and Measurement Systems
SP490CS-L is suitable for measurement and instrumentation equipment that needs a reliable differential serial connection between a controller and an external instrument. The receiver sensitivity of ±200 mV supports detecting modest differential signals, and the 5 Mbps rate can accommodate short-distance high-speed command or status traffic. The device should be used with a defined protocol, controlled grounding, and appropriate cable termination rather than being treated as a generic logic-level serial interface. Because the supplied data does not specify complete timing, common-mode limits, or temperature ranges for the exact suffix, those parameters must be checked in the manufacturer datasheet.
Recommandé
Data Acquisition and Remote Control
The SP490CS-L can provide the balanced physical layer for remote data-acquisition and control equipment. A central controller may use the driver to broadcast commands, while the receiver returns status or sensor data over the differential bus. The SP490 family’s low-power BiCMOS implementation and 0.9 mA typical supply current can help fit the interface into embedded systems, although system-level consumption must be calculated from the complete design. Use a termination strategy appropriate to the topology, avoid long unterminated stubs, and ensure that the selected transceiver’s enable behavior matches the bus architecture.
Recommandé
Industrial Communication Gateways
SP490CS-L is appropriate for a communication gateway that bridges a short internal controller connection to an external RS-485 or RS-422 network. Its 5 Mbps capability allows the physical layer to support faster traffic than many low-speed field buses, while the full-duplex configuration can be useful when separate transmit and receive paths are available. The through-hole 8-pin plastic DIP package may suit leaded gateway prototypes or industrial assemblies, but a production design should confirm exact dimensions, pin numbering, soldering profile, and thermal requirements. Add surge and ESD protection according to the installation’s environmental risk.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SP490CS-L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SP490CS | SP490ECP-L | LTC490 | SN75179 | MAX490CPA+ |
|---|---|---|---|---|---|---|
| Package | 8-pin plastic DIP | 8-pin plastic DIP | DIP-8 | 8-pin DIP | 8-pin DIP | DIP-8 |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices | Texas Instruments | Maxim Integrated |
Principaux différenciateurs
- 5 Mbps differential interface capability (vs SP490CS)
- Explicit ±200 mV receiver sensitivity (vs LTC490)
- SP490-specific enable architecture (vs SP491)
Notes de conception
Keep the differential driver and receiver traces as a closely matched pair from the SP490CS-L pins to the connector or isolation barrier. Avoid introducing split planes, long stubs, or unrelated high-current routing between the two conductors. Because the verified 5 Mbps rating is a device capability, validate the complete channel with the intended cable, connector, termination, and grounding arrangement rather than relying on the transceiver rating alone.
Place the supply bypass capacitor close to the VCC and ground pins, and route the return path to minimize loop area. The verified typical supply current is 0.9 mA at 5 V, but the complete design may draw substantially more current from external circuitry. Confirm the datasheet’s recommended capacitance, voltage rating, and startup requirements before finalizing the power network.
Do not substitute SP491 functionality for SP490 functionality without checking the circuit. The manufacturer description states that SP491 adds driver and receiver tri-state enable lines, whereas SP490 does not. A board that depends on controlled bus release, isolation, or multiple-node direction control may require a different device or a deliberate interface change.
Use cable-side protection appropriate to the installation: TVS devices, common-mode chokes, isolation, or surge protection may be needed where the RS-485 line leaves an enclosure. Keep protection components close to the connector and away from sensitive receiver routing. The differential pair helps reject common-mode noise, but it does not replace proper shielding, grounding, and surge mitigation.
Informations de conformité
Lead-free and RoHS compliance are stated in the SP490CS-L distributor information. No verified REACH, AEC-Q100, halogen-free, or conflict-minerals declaration was supplied.
