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SP208CA-L/TR - 5V RS-232 4-Driver/4-Receiver Transceiver | MaxLinear
The MaxLinear SP208CA-L/TR is a 5V-powered RS-232 line transceiver integrating four drivers and four receivers in a 24-pin SSOP package. It operates from a single 4.5V to 5.5V supply and supports data rates up to 120 kbps (230 kbps typical), making it compatible with high-speed modems and PC remote-access applications. The device uses 0.1uF external charge pump capacitors and MaxLinear's patented on-board charge pump circuitry to generate the +/-10V RS-232 voltage levels required by the TIA/EIA-232 standard. An RS-232 transceiver is a type of serial communication interface IC that bridges the logic-level UART signals of a microcontroller or processor with the higher-voltage, inverted-polarity signaling defined by the TIA/EIA-232 (formerly RS-232) standard. Within the broader semiconductor hierarchy, RS-232 transceivers sit under interface ICs, which themselves belong to the integrated circuit family alongside line drivers, bus transceivers, and level shifters. The SP208CA-L/TR is engineered for multi-channel point-to-point asynchronous serial links where reliable +/-10V signaling, electrostatic discharge (ESD) robustness, and minimal external component count are required. Key features include 4 drivers and 4 receivers in a single IC, ESD protection of more than +/-15 kV on driver output and receiver input pins for both Human Body Model and IEC 1000-4-2 air-discharge events, a 1.0uA typical shutdown current, tri-state receiver outputs, and low-power CMOS construction. The 24-pin SSOP package supports commercial temperature range (0C to +70C) and occupies minimal PCB real estate. Multiple drivers and receivers in a single package reduce both board area and total BOM cost for designs that need to implement the standard DB9 or DB25 RS-232 port complement. Technically, the SP208CA-L/TR uses a regulated dual-charge-pump voltage converter with internal switch capacitors and an architecture patented under US patent 5,306,954. The on-chip charge pump generates the +10V and -10V RS-232 rails from a single +5V input, eliminating the need for a negative supply. Driver slew rate is internally limited to reduce EMI and to meet the RS-232 transition time specification. Receivers remain operational when the device is in shutdown, which is useful for wake-up detection in DTE/DCE applications. Typical applications include point-of-sale (POS) terminals, industrial control RS-232 ports, legacy PC serial ports, embedded UART debug consoles, and any MCU/MPU system that must communicate with RS-232 peripherals. The 0.1uF external capacitors and high ESD rating make it well-suited for handheld and industrial equipment where PCB space is constrained and field ESD exposure is a concern. When designing with this part, place the four charge pump capacitors (typically four 0.1uF ceramics) as close as possible to the C1+, C1-, C2+, C2- pins to minimize ripple on the generated +/-10V rails. Observe the recommended trace geometry for the SSOP-24 thermal pad (none on this part) and provide a solid ground plane beneath the device to maximize ESD and EMI immunity. This page synthesizes distributor pricing, drop-in cross-brand alternatives from the SP208 family, application guidance, and design notes not typically aggregated on the manufacturer datasheet, giving engineers a single, citable reference for the SP208CA-L/TR.
SP3222EBEY-L/TR - 3V-5.5V RS-232 2-DRV/2-RCV Transceiver | MaxLinear
The MaxLinear SP3222EBEY-L/TR is a 3.0V to 5.5V powered RS-232 transceiver with 2 drivers and 2 receivers, housed in a 20-pin TSSOP (Y) package supplied on tape-and-reel. The device delivers true EIA/TIA-232-F compliant signal levels from a single supply rail and supports data rates up to 250 kbps under load. An integrated high-efficiency charge pump requires only four 0.1 µF external capacitors in 3.3V operation, minimizing board area and BOM cost. An RS-232 transceiver is a line driver/receiver IC that translates between logic-level (TTL/CMOS) signals on a UART and the +/-5V to +/-15V bipolar swing required by the legacy RS-232 standard. Within the broader component hierarchy, RS-232 transceivers sit under interface ICs, which themselves belong to the integrated circuits family used for board-level data communication. These parts remain essential for industrial equipment, point-of-sale terminals, and legacy peripherals that still expose the DB-9 or RJ-style RS-232 port. Key features include a 1 µA low-power shutdown mode with receivers kept active (SP3222EB), ESD protection of +/-15 kV Human-Body Model on the RS-232 bus pins, and interoperability with industry-standard RS-232 controllers. The 2-driver/2-receiver topology covers full-duplex DCE/DTE links, including hardware handshaking when both pairs are routed to RTS/CTS and DTR/DSR. The TSSOP-20 footprint and 4.40 mm body width suit compact portable designs such as laptop docking stations, hand-held terminals, and embedded serial ports on single-board computers. Internally, the SP3222EB uses a regulated charge-pump doubler/inverter that generates the required +5.5V and -5.5V drivers from a single 3.0V to 5.5V supply, eliminating the historical need for a +/-12V rail. Receivers operate from the main 3.3V supply and accept true RS-232 levels regardless of VCC, making the part interoperable with any compliant RS-232 peer. Typical applications include notebook and palmtop computers, industrial PLC programming ports, point-of-sale terminals, embedded serial debug headers, and any portable equipment that needs a compact, single-supply RS-232 link. Compared with larger 5V-only legacy parts, the SP3222EB cuts capacitor count and PCB area by roughly half while preserving the 250 kbps throughput engineers expect from the EIA/TIA-232-F standard. When designing with this device, place the four 0.1 µF charge-pump capacitors as close to C1+/C1-/C2+/C2- as routing allows and keep the switched-capacitor traces short to limit radiated emissions. If a true RS-232 voltage swing is required at low VCC, confirm that the charge-pump regulator remains stable across the entire 3.0V to 5.5V input range. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving buyers and design engineers a single reference for sourcing and applying the SP3222EBEY-L/TR.
SP3222ECT-L/TR - 3V-5.5V RS-232 2-Driver/2-Receiver Transceiver | MaxLinear
The MaxLinear SP3222ECT-L/TR is a 2-driver / 2-receiver RS-232 transceiver IC operating from a single 3V to 5.5V supply, housed in an 18-pin SOIC (7.50 mm width) package and shipped on Tape & Reel. The part meets true EIA/TIA-232-F standards, supports a minimum 120 kbps data rate under full load, and offers a 1 µA low-power shutdown mode with receivers remaining active for external device monitoring. According to the MaxLinear SP3222E/SP3232E datasheet, the integrated high-efficiency charge-pump requires only 0.1 µF capacitors in 3.3V operation. An RS-232 transceiver is a type of serial communication interface IC that converts logic-level UART signals (typically 0V/3.3V or 0V/5V CMOS/TTL) to the higher bipolar ±5V to ±15V signaling levels required by the legacy EIA/TIA-232 standard. Within the broader hierarchy, RS-232 transceivers belong to the line driver/receiver family, which itself sits under interface ICs in the power management and connectivity ecosystem. They are essential for bridging modern microcontrollers with industrial PCs, point-of-sale terminals, legacy peripherals, and serial debug ports. Key features include true EIA/TIA-232-F compliance from a 3.0V to 5.5V rail, an enhanced ESD protection rating on the RS-232 pins, 1 µA shutdown current with receiver wake-up, and integrated charge-pump DC-DC converters that eliminate the need for a separate ±12V supply. The 18-SOIC wide-body package supports standard 300-mil PCB footprints and provides robust thermal performance for industrial environments. Operating temperature range is 0°C to +70°C for the commercial-grade 'ECT' suffix variant. The architecture pairs an on-chip charge pump with a proprietary low-dropout transmitter topology and a logic-side receiver with hysteresis, ensuring noise-immune reception in electrically noisy industrial cabinets. The high-efficiency charge pump uses only four small 0.1 µF capacitors and produces ±5.5V rails from a 3.3V input, allowing true RS-232 swing without external DC-DC converters. Typical applications include notebook and palmtop computers, industrial control PLC serial ports, point-of-sale (POS) terminals, battery-powered handheld instruments, and any design that needs true RS-232 levels from a single low-voltage logic supply. When designing with this part, keep in mind that the shutdown pin (/SHDN) must be driven high for normal operation and pulled low only when battery life is critical. Decoupling the charge-pump capacitors with short, low-ESR traces directly at pins C1+, C1-, C2+, and V- minimizes output ripple. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the standalone manufacturer datasheet, giving purchasing and engineering teams a single source for cross-functional decision-making.
SP3223EUCY-L - +3.0V to +5.5V RS-232 Transceiver | MaxLinear
The MaxLinear SP3223EUCY-L is an intelligent +3.0V to +5.5V RS-232 transceiver housed in a 20-pin TSSOP package, providing two drivers and two receivers (2/2) for full-duplex RS-232 communication. Key specifications include a guaranteed data rate of 1000 kbps, supply current of 0.3 mA typical, and an integrated high-efficiency charge-pump that requires only 0.1 µF capacitors for 3.3V operation. The device is designed for portable applications such as notebook computers and handheld terminals where board space and power efficiency are critical. What is an RS-232 transceiver? An RS-232 transceiver is an interface IC that converts logic-level UART signals (typically 0V/3.3V or 0V/5V CMOS/TTL) into the bipolar ±5V to ±15V voltage swings defined by the EIA/TIA-232-F standard, which legacy PCs, industrial controllers, point-of-sale terminals, and instrumentation equipment use for serial communication. Within the broader component taxonomy, RS-232 transceivers sit under Interface ICs, alongside RS-485 transceivers, CAN transceivers, and USB-to-UART bridges. The SP3223EUCY-L delivers compliant RS-232 performance from a single 3.0V to 5.5V supply, interoperates with EIA/TIA-232 down to a 2.7V source, and adheres to EIA/TIA-562 at reduced drive levels. Its AUTO ON-LINE® circuitry automatically wakes the device from shutdown when a valid RS-232 signal is detected on the receiver input, eliminating the need for external activity-detect logic. An enhanced ESD rating of ±15 kV Human Body Model on the driver outputs and receiver inputs provides robust protection against cable-discharge transients in real-world environments. Typical applications include notebook and handheld computer serial ports, industrial PDA cradles, point-of-sale (POS) terminals, battery-powered diagnostic equipment, and any portable embedded system that needs a true RS-232 link without the bulk of a ±12V supply. The 0.1 µF charge-pump capacitors and 20-pin TSSOP footprint allow a complete 2-driver/2-receiver RS-232 port to fit in roughly 30 mm² of board area. The 0°C to +70°C commercial operating range suits indoor enclosures and consumer-grade handhelds; for industrial temperature designs, an 'I' suffix variant (SP3223EUCY-L is the commercial-grade part) is available from the same family. When designing with this part, remember that the 1000 kbps data rate requires the AUTO ON-LINE® wake-up path to settle; if the system depends on sub-millisecond link bring-up after power-down, gate the FORCEON pin externally. Place the four 0.1 µF charge-pump capacitors (C1–C4) within 3 mm of the IC pins to keep switching noise off the analog ground plane. The "-L" suffix indicates the lead-free / RoHS-compliant finish; pair this with a nickel-palladium-gold (NiPdAu) or matte-tin PCB surface finish to prevent solderability issues during reflow. This page synthesizes MaxLinear distributor pricing, drop-in same-package alternatives, and practical charge-pump PCB layout guidance that the bare datasheet does not present in a single place.
SP3238EEY-L - 5/3 RS-232 Transceiver, 250 kbps, 28-SSOP | MaxLinear
The MaxLinear SP3238EEY-L is a 5-driver / 3-receiver RS-232 transceiver that operates from a single +3.0V to +5.5V supply and delivers true EIA/TIA-232-F compliant signal levels. Housed in a 28-pin SSOP (TSSOP-equivalent) package, it supports data rates up to 250 kbps and operates from -40C to +85C. Key features include an internal high-efficiency charge-pump power supply that requires only 0.1uF capacitors at 3.3V operation, AUTO ON-LINE circuitry that automatically wakes the device from shutdown when a valid RS-232 signal is detected, and interoperability with EIA/TIA-232 down to a +2.7V power source. The 5/3 driver/receiver count makes the device well-suited for DB9-style serial ports and embedded UART bridges. The SP3238E device is an RS-232 transceiver solution intended for portable or hand-held applications such as notebook and palmtop computers. Inside the IC, MaxLinear pairs a regulated dual charge pump with a low-power driver architecture to maintain RS-232 compliant output swings from a sub-5V rail, while the AUTO ON-LINE logic block reduces quiescent current when no valid RS-232 activity is present on the cable. Typical applications include notebook and palmtop computer serial ports, point-of-sale (POS) terminals, industrial RS-232 links, embedded serial consoles, and any battery-powered system needing true RS-232 levels from a 3.3V logic rail. Designers regularly pair it with a DB9 connector and 0.1uF X5R ceramic bypass caps for a compact interface. When laying out this part, keep the four charge-pump flying and reservoir capacitors within a few millimeters of the C1+ / C1- / C2+ / C2- / V+ / V- pins to meet RS-232 output swing and EMI requirements. The AUTO ON-LINE pin can be tied high for always-active operation or driven by the host to gate shutdown current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
SP3238EEY-L-TR - 5/3 RS-232 Transceiver, 3-5.5V, 28-TSSOP
The MaxLinear (formerly Exar) SP3238EEY-L/TR is an intelligent +3.0V to +5.5V RS-232 transceiver in a 28-pin TSSOP package, integrating five drivers and three receivers with a charge-pump DC-DC converter on-chip. It operates from a single 3.0V to 5.5V supply, supports data rates up to 250 kbps, and meets the EIA/TIA-232-F and ITU-T V.28/V.24 specifications over the industrial -40C to +85C temperature range. The device is supplied on a 2,500-unit tape-and-reel and is targeted at portable and hand-held applications such as notebook, palmtop, PDA, and battery-powered equipment. A RS-232 transceiver is a line driver/receiver pair that converts logic-level UART signals to and from the +/-5V to +/-15V swing required by the legacy RS-232 standard, enabling reliable point-to-point serial communication between data terminal equipment (DTE) and data communication equipment (DCE). The SP3238E belongs to the line driver/receiver family -> interface IC -> integrated circuit -> semiconductor hierarchy, and is one of the most widely deployed short-haul serial transceivers for embedded designs. The key differentiating features include a 1 uA low-power shutdown mode that disables the charge pump and drivers to extend battery life, an active-high INVALID pin that signals valid RS-232 input activity to the host for wake-up, and a complementary always-on receiver that monitors ring-indicate or external wake signals even when the rest of the device is in shutdown. Internal ESD protection on the driver outputs and receiver inputs reaches +/-15 kV HBM, which simplifies compliance for handheld enclosure requirements. Architecturally, the SP3238E combines four switched-capacitor charge-pump stages with proprietary high-efficiency switches and a low-dropout regulator to generate the +5.5V and -5.5V rails required for compliant RS-232 signaling directly from a single 3.0V or 5.0V system rail. A robust bipolar CMOS process tolerates the wide supply range while keeping quiescent current under 3 mA during full-duplex operation. Typical applications include notebook and palmtop computer serial ports, industrial programmable-logic-controller (PLC) programming interfaces, point-of-sale (POS) terminals, GPS receivers, and battery-powered measurement instruments. Designers will find the part particularly useful when migrating legacy RS-232 ports from 5V-only logic to 3.3V microcontrollers without external charge pumps. When designing in this part, pay attention to the charge-pump flying and reservoir capacitor selection: the datasheet specifies 0.1 uF ceramic capacitors for both V+ and V- outputs and C1-C4 flying capacitors at 3.3V operation, switching to 0.047 uF at 5.0V. Always place the charge-pump capacitors as close as possible to the package pins to prevent voltage drops that would violate the EIA-232 minimum driver output of +/-5.0V at maximum load. This page synthesizes distributor pricing, drop-in alternatives in the same 28-TSSOP footprint, and practical PCB layout notes not found in the manufacturer datasheet alone.
SP3244EER1-L - 3V-5.5V RS-232 Transceiver with Auto On-Line Plus | MaxLinear
The MaxLinear SP3244EER1-L is a 3.0V to 5.5V powered RS-232 transceiver containing 3 drivers and 5 receivers in a 32-pin QFN (5x5 mm) package, designed for DTE (PC or terminal) serial port applications. It delivers a slew-limited 250 kbps data rate and integrates MaxLinear's Auto On-Line Plus power-saving circuitry, which automatically shuts down the on-board charge pump and drivers when no valid RS-232 signal is present at the receiver inputs. The single-chip solution operates from a single +3.0V to +5.5V supply, eliminating the bipolar +/-12V rails historically required for EIA/TIA-232 interfaces. The device is pin-compatible with the legacy SP3243E/SP3243EB family, providing an upgrade path with enhanced power savings. An RS-232 transceiver is a type of line driver/receiver IC that converts logic-level UART signals (typically 0V to VCC) into bipolar RS-232 voltage levels (typically +/-5V to +/-8V) required by the legacy EIA/TIA-232-F standard. Within the broader hierarchy of interface ICs, the SP3244EER1-L sits in the line transceiver family, which itself belongs to the wired communication interface category. These devices are essential bridges between modern low-voltage microcontrollers and the ubiquitous RS-232 world of industrial equipment, point-of-sale terminals, and legacy instrumentation. The integrated charge pump generates the required bipolar rails from a single supply, simplifying PCB design. Key features include the 250 kbps slew-limited data rate, which minimizes EMI by controlling edge rates below the RS-232 standard's 30 V/us limit. The Auto On-Line Plus mode draws only microamps of supply current when cable is disconnected, making it suitable for battery-powered or thermally constrained designs. The receiver outputs remain active in shutdown, allowing ring-indicator monitoring and wake-on-ring functionality. ESD protection exceeds +/-15 kV HBM on the driver outputs and receiver inputs per IEC 61000-4-2 air discharge. Logic inputs include 5V-tolerant design when operating from a 3.3V supply, simplifying connection to 5V MCUs without level shifters. The SP3244EER1-L leverages a proprietary charge pump architecture with four external 0.1 uF flying capacitors and four reservoir capacitors, achieving true bipolar RS-232 compliance from a single +3.3V rail. This eliminates bulky dual-rail DC-DC converters or boost topologies. The 5x5 mm QFN-32 footprint with thermal pad enables compact PCB layouts suitable for handheld and embedded designs, while the industrial temperature range of -40C to +85C supports harsh-environment deployment. Designers can leverage the SP3243E compatibility for firmware and PCB drop-in upgrades. Typical applications include industrial RS-232 ports, point-of-sale (POS) terminals, handheld barcode scanners, embedded computing modules, factory automation controllers, and any MCU-based product needing a TIA/EIA-232-F compliant serial port. Auto On-Line Plus makes the SP3244EER1-L particularly attractive for battery-powered handheld devices where standby current budget is critical. When designing with this part, observe the charge pump capacitor layout guidelines - place all eight 0.1 uF capacitors as close to the IC pins as possible with short, wide traces to minimize ripple on the generated bipolar rails. Note that the part number suffix '-L' designates lead-free (RoHS-compliant) packaging; the '-L/TR' variant ships on tape-and-reel. Verify maximum cable capacitance of 2500 pF for compliance with TIA/EIA-232-F at 250 kbps. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
SP331CT-L - RS232/485 Programmable 4/4 Transceiver | MaxLinear
The MaxLinear SP331CT-L is a programmable 4-driver/4-receiver multi-protocol transceiver that supports RS-232, RS-422, and RS-485 interfaces from a single 5V supply, housed in a 28-pin SOIC package. It integrates four drivers and four receivers in a 28-SOIC footprint with on-board charge-pump capacitors required only on the RS-232 drivers, and supports data rates up to 10 Mbps in RS-485 mode. A multi-protocol transceiver is a single-chip device that consolidates several serial-communication physical layers (RS-232, RS-422, RS-485) into one IC so a design can reconfigure its port via pin straps or firmware to operate on different buses without changing the PCB. In the broader taxonomy, the SP331CT-L belongs to the line driver/receiver family, which sits inside interface ICs, which are a sub-class of integrated circuits (semiconductors). This consolidation reduces BOM count, simplifies qualification, and lets one hardware platform address multiple end-customer protocols such as Modbus RTU (RS-485), EIA-232 point-to-point links, and EIA-422 multi-drop networks. Key features include 4 drivers / 4 receivers, RS-232 charge pump integrated on-chip (no external capacitors for the RS-232 drivers), RS-485 data rate up to 10 Mbps, a self-test loopback mode that internally routes driver outputs back to the receiver inputs for board-level diagnostics, and a commercial 0°C to +70°C operating temperature range. The 28-SOIC (JEDEC MS-013) wide-body package simplifies hand-prototyping and rework compared to finer-pitch QFN alternatives. Technically, the SP331CT-L pairs a charge-pump doubler/inverter (using four small external capacitors) with bipolar RS-485/RS-422 transceivers; the protocol select pins program each channel pair for the appropriate slew rate and load. Enhanced ESD protection of ±15 kV per IEC 61000-4-2 (air discharge) is implemented on the bus pins, removing the need for external TVS arrays in many industrial enclosures. Typical applications include multi-protocol industrial serial ports, factory-automation PLCs, point-of-sale terminals, and instrumentation that must support both legacy RS-232 equipment and modern RS-485 multi-drop fieldbus networks. The loopback mode is particularly useful for production test and field diagnostics. When designing with this device, route the RS-485 bus traces as a 100 Ω differential pair with characteristic impedance matching and place the four charge-pump capacitors (typically 0.1 µF) as close as possible to the charge-pump pins to reduce radiated EMI and ensure the ±15 kV ESD rating is preserved. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes (charge-pump layout, protocol-pin programming, IEC 61000-4-2 ESD handling) that complement but go beyond what the manufacturer datasheet alone provides.
SP334CT-L - Programmable RS-232/RS-485 Transceiver 28-SOIC | MaxLinear
The MaxLinear SP334CT-L is a programmable RS-232 and RS-485 transceiver IC integrating three drivers and five receivers in RS-232 mode and two drivers and two receivers in RS-485 mode, packaged in a 28-pin SOIC with single 4.75 V to 5.25 V supply. The device supports data rates up to 230 kbps in RS-232 mode and up to 5 Mbps (driver) in RS-485 mode, with slew-rate-limited drivers to minimize EMI on shared multipoint buses. A multi-protocol transceiver IC combines a UART/serial-port line interface that bridges an MCU's asynchronous logic-level serial port to industry-standard differential or single-ended physical-layer signaling used in industrial, point-of-sale, and embedded-networking equipment. The SP334 family sits in the broader Interface IC hierarchy (line transceiver > multiprotocol transceiver > serial interface > wired connectivity IC) and is commonly used to consolidate RS-232 and RS-485 ports onto one PCB footprint when both legacy and industrial buses must coexist. Key features include on-board charge-pump DC-DC converters that generate the +/- 5 V to +/- 10 V RS-232 levels from a single 5 V supply, true fail-safe receiver inputs on the RS-485 path (guaranteed logic-high output with open or shorted inputs), thermal-shutdown protection, and a hardware strap (pin 28 / SLP) that selects between RS-232 and RS-485 modes. The internal drivers use slew-rate control on the RS-485 side to limit harmonic content and reduce reflections on unterminated stubs. Driver and receiver enable pins allow half-duplex RS-485 direction control while preserving RS-232 simplex operation. The SP334 architecture uses a BiCMOS process that integrates charge-pump capacitors externally but keeps the charge-pump switching nodes, drivers, and receivers on the same die. This minimizes external component count to typically six 0.1 uF pump capacitors plus standard bypass. The RS-485 drivers meet the TIA/EIA-485-A differential output swing of at least 1.5 V across a 27 ohm load and the receiver thresholds follow the +/- 200 mV standard with the additional fail-safe bias. Typical applications include multi-drop RS-485 industrial fieldbus nodes, point-of-sale terminals that require RS-232 for legacy peripherals, factory automation controllers, and HVAC or building-automation gateways. Designers choose the SP334 when a single BOM line item must cover both a maintenance-port RS-232 connection and an RS-485 trunk to neighboring equipment. A key design consideration is the charge-pump capacitor selection: 0.1 uF ceramics with low ESR and at least 16 V rating are recommended. Pump frequency is typically 1 MHz; bypassing the V+ and V- pins with 0.1 uF plus 10 uF bulk capacitors improves RS-232 output symmetry under heavy load. The mode-select pin must be tied high or low and not left floating during operation. This page synthesizes distributor pricing, parametric drop-in alternatives, and application-level design notes not consolidated in the manufacturer datasheet, giving engineers a faster sourcing decision path for the SP334CT-L.
SP335EER1-L/TR - Multiprotocol RS-232/RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP335EER1-L/TR is an advanced multiprotocol serial transceiver supporting RS-232, RS-422, and RS-485 standards in a single 32-pin QFN (5x5 mm) package with exposed thermal pad. The device integrates 1 driver / 1 receiver pair for RS-232 mode and 2 driver / 2 receiver pairs for RS-485/RS-422 mode, supporting data rates up to 1 Mbps in RS-232 and up to 20 Mbps in RS-485/422. It operates from a 3.0 V to 5.5 V single supply and requires only four external charge-pump capacitors. A multiprotocol transceiver is a single-chip interface IC that allows a UART, MCU, or FPGA to communicate over multiple serial standards (RS-232 single-ended, RS-422 differential, RS-485 half/full duplex) through one connector. Compared with dedicated transceivers, it eliminates external mode-switching FETs or relays, reduces BOM count, and enables a single PCB layout to serve multiple cable protocols. Multiprotocol transceivers belong to the broader category of line drivers / receivers within the wired-communication interface family. Key features include integrated 120 ohm cable termination (selectable via the TERM pin), a half/full duplex mode pin, mode selection between RS-485 and RS-232, internal charge pump for RS-232 driver voltage generation, and an exposed thermal pad for enhanced power dissipation. The device supports up to 32 transceivers on a single RS-485 bus and is offered in industrial -40 C to +85 C operating temperature range. The SP335EER1-L/TR uses a BiCMOS process with on-chip charge-pump regulators to generate the RS-232 +/-5 V output swing from a single 3.3 V or 5 V rail. The differential drivers in RS-485/RS-422 mode deliver a 1.5 V minimum differential output across 27 ohm load, supporting the TIA/EIA-485 standard. ESD protection on the bus pins exceeds +/-15 kV HBM (per the manufacturer datasheet, SP335E revision 1.02, 2017). Typical applications include multiprotocol industrial serial ports, point-of-sale terminals, building automation controllers, RS-232 to RS-485 protocol converters, and embedded communication modules that must interoperate with legacy and modern fieldbus equipment. The integrated termination and flexible mode control make it well suited for mixed-protocol field service equipment. When designing with this part, place the four charge-pump capacitors (typically 0.1 uF or 1 uF) as close to the C1+ / C1- / C2+ / C2- pins as possible. Use a solid ground plane beneath the exposed pad and stitch vias around the perimeter for thermal relief. Mode pin logic transitions should occur only when the drivers are disabled to avoid bus contention. This page synthesizes distributor pricing, drop-in alternatives, design notes, and parametric comparisons drawn from MaxLinear datasheets and DigiKey/Mouser/Octopart listings as of 2026-10-10.
SP3490EN-L/TR - 3.3V Full-Duplex RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP3490EN-L/TR is a 3.3V low-power full-duplex RS-485/RS-422 transceiver with 10 Mbps data rate in an 8-pin SOIC package. It integrates one driver and one receiver, supports supply voltages from 3.0V to 3.6V, and tolerates ±2 kV ESD on the bus pins per HBM-style contact discharge. The part draws a typical supply current of approximately 1 mA during operation and is qualified over the -40°C to +85°C industrial temperature range. An RS-485/RS-422 transceiver is a differential line driver/receiver IC that converts TTL/CMOS logic levels on the UART or controller side into balanced differential signals on a twisted-pair bus, enabling reliable multi-drop communication over long cable runs. SP3490EN-L/TR operates as a full-duplex link (separate driver output and receiver input pins), sits in the interface-IC family inside the broader signal-path taxonomy (transceiver -> line driver/receiver -> interface IC -> semiconductor). It interoperates with industry-standard 3.3V transceivers such as the MAX3485 and MAX3490, simplifying second-source qualification. Key features include driver slew-rate limited edges to control EMI, thermal-shutdown protection, short-circuit protection on the bus outputs, and a high-impedance shutdown mode (only on SP3491 variant; the SP3490 has permanently enabled driver/receiver paths). The BiCMOS process keeps quiescent current low while still supporting 10 Mbps signaling, which is significantly faster than legacy 2.5 Mbps RS-485 parts and sufficient for PROFIBUS, DMX512, and many industrial fieldbus extensions. Architecturally, the SP3490EN-L/TR uses a charge-pump to generate the higher rail needed for true RS-485 output swings from a single 3.3V supply, avoiding the dual +/-5V rails required by older generations. The receiver offers a 200 mV input hysteresis for noise immunity on long bus stubs. Typical applications include multi-drop RS-485 networks, point-to-point RS-422 links, DMX512 stage lighting, industrial PLC backplanes, and building-automation gateways requiring 3.3V-only logic compatibility. It is widely paired with low-power MCUs such as STM32 and ESP32 that operate natively at 3.3V. For robust bus design, use 120 Ω termination at both cable ends, place a 100 nF decoupling capacitor within 5 mm of the VCC pin, and ensure stub lengths remain under one-tenth of the driver's rise time at the data rate used. This page synthesizes distributor pricing, drop-in cross-brand equivalents, and PCB design notes that complement the manufacturer datasheet.
SP3491EN-L - 3.3V Full-Duplex RS-485/422 Transceiver | MaxLinear
The MaxLinear SP3491EN-L is a +3.3V low-power full-duplex RS-485/RS-422 transceiver in a 14-pin SOIC (narrow) package, supporting data rates up to 10 Mbps. It integrates one driver and one receiver, supports 32 transceivers on the bus (1/8 unit load), and operates from a single 3.0V-3.6V supply. The device is pin-to-pin compatible with the MaxLinear SP490 and SP491 family and several industry-standard equivalents, enabling drop-in second-source replacement. According to the MaxLinear SP3490/SP3491 datasheet, the part uses a BiCMOS process for low power without sacrificing transient or ESD performance, and the SP3491 is qualified to +/-15kV HBM ESD on the bus pins. A transceiver in the RS-485/RS-422 category is a physical interface IC that converts between a single-ended UART/logic signal on the controller side and a differential signaling pair on the cable side, allowing reliable data transmission over twisted-pair copper cables up to 1200 meters. RS-485 and RS-422 are TIA/EIA standards that define differential voltage levels, common-mode range, and bus loading. Full-duplex transceivers use separate differential pairs for transmit and receive, enabling simultaneous bidirectional communication; this differs from half-duplex parts that share a single pair. RS-485/RS-422 belongs to the broader Interface ICs family, which sits under Integrated Circuits in the standard electronics taxonomy. Key features of the SP3491EN-L include 10 Mbps signaling, 1/8 unit-load bus loading (up to 32 nodes), +/-15kV HBM ESD on the bus pins, slew-rate-limited driver for reduced EMI, thermal shutdown protection, and short-circuit-proof driver outputs. The 14-SOIC package simplifies PCB layout with a familiar 150-mil wide body and standard JEDEC SO-14 land pattern, easing assembly and rework. The architecture combines a differential driver and differential receiver with hot-plug support and failsafe receiver design that guarantees a logic-high output when the bus is idle, open, or shorted. Combined with the low quiescent current, this makes the SP3491EN-L well suited to multi-drop industrial fieldbus networks where robust failsafe behavior is critical. Typical applications include industrial RS-485 fieldbus networks, factory automation and motor control, building automation (BACnet, Modbus), point-of-sale terminals, and any embedded UART-to-RS-485 bridge where 3.3V logic levels drive a long cable. When designing with this device, terminate the bus with 120 ohm resistors at both ends and keep stubs short to preserve signal integrity at 10 Mbps. Provide adequate decoupling (100 nF plus 1 uF) close to VCC, and consider slew-rate-limited variants if EMI is a concern.
SP385EEA-L/TR - 3.3V/5V RS-232 Transceiver, 2x Driver/Receiver | MaxLinear
The MaxLinear SP385EEA-L/TR is a 2-driver / 2-receiver full-duplex RS-232 line transceiver that operates from a single 3.3 V or 5 V supply, supplied in a 20-pin SSOP (0.209 inch / 5.30 mm body width) package and shipped on tape and reel. The device supports data rates up to 120 kbps and conforms to EIA-232-D and V.28 specifications at 5 V, while also meeting EIA-562 (EIA/TIA-562) requirements at 3.3 V, enabling direct use in legacy RS-232 ports and newer 3.3 V MCU platforms without level translators. An RS-232 transceiver is a type of serial interface IC that translates logic-level (typically 0 V to VCC) UART signals on one side to the ±5 V to ±15 V single-ended voltage swings defined by the EIA-232 standard on the cable side. Transceivers sit at the physical-layer boundary of the data terminal equipment (DTE) / data circuit-terminating equipment (DCE) link, converting between the UART's CMOS/TTL domain and the higher-voltage cable domain so microcontrollers, FPGAs, or ASICs can communicate with PCs, modems, industrial controllers, and point-of-sale terminals. The SP385EEA-L/TR belongs to the SP200/SIPEX legacy family and is an enhanced, 3 V-capable upgrade of the original SP310A. Key features include on-board charge-pump DC-DC converters that generate the ±RS-232 driver supplies from a single logic rail, four external charge-pump capacitors (typically 0.1 µF), and an ON/OFF (shutdown) input that tri-states the drivers for power management. The receivers remain active during shutdown so they can monitor incoming data while the system is idle. Driver outputs are protected against ±15 kV of ESD using the Human Body Model, and the part is rated for commercial and industrial temperature ranges. Typical applications include battery-powered handheld terminals running from 3.3 V or 5 V single-rail supplies, industrial programmable logic controllers (PLCs), RS-232 ports on single-board computers and embedded MCUs, cable modem and set-top box control channels, point-of-sale / barcode scanner interfaces, and direct UART-to-DB9 front panels. The wide supply range (3.0 V to 5.5 V) lets a single BOM cover both 3.3 V MCU designs and legacy 5 V systems.
SP485 - 5Mbps Low Power Half-Duplex RS-485 Transceiver | MaxLinear
The MaxLinear SP485 is a low-power half-duplex RS-485/RS-422 transceiver in an 8-pin SOIC (NSOIC) package, providing one driver and one receiver per channel with data rates up to 5 Mbps. The device operates from a single 5 V supply and is designed with a BiCMOS process that delivers low quiescent current while preserving RS-485 robustness, including ±15 kV HBM ESD protection on the bus pins. The driver output slew rate is not slew-rate limited, which maximizes data throughput but requires proper cable and termination practices to control EMI in long runs. A RS-485 (Recommended Standard 485) transceiver is a physical-layer interface IC that converts the differential voltage of a balanced twisted-pair bus to single-ended logic levels used by UARTs, MCUs, and FPGAs. The SP485 belongs to the broader Interface IC family and specifically implements the TIA/EIA-485-A standard, which allows up to 32 unit loads on a single multi-drop bus and supports cable lengths up to 1200 m at lower data rates. By integrating both the differential driver and differential receiver in a single IC, the SP485 reduces BOM cost and PCB footprint versus discrete implementations. Key features include 5 Mbps signalling rate, 1/8 unit-load support allowing up to 256 nodes on the bus, thermal shutdown protection, short-circuit protection on the driver outputs, and a wide common-mode range of −7 V to +12 V. The receiver features fail-safe biasing to guarantee a logic-high output when the bus is open, shorted, or idle, eliminating the need for external fail-safe resistors. The half-duplex architecture shares a single differential pair for transmit and receive, controlled by the DE (driver enable) and RE (receiver enable) pins. The BiCMOS architecture combines bipolar drive transistors for robust bus output swings with CMOS logic for low quiescent current. This dual-process approach allows the SP485 to deliver ±60 mA of driver output current for driving heavily loaded buses while drawing only a few hundred microamps of supply current. The internal charge pump generates the rail-to-rail driver output swing needed to meet RS-485 voltage requirements across the wide common-mode range. Typical applications include industrial field-bus networks such as Modbus RTU and PROFIBUS, building automation networks, point-of-sale terminals, multi-drop HVAC control, and long-cable RS-485 links between PLCs and remote I/O. The SP485 is also widely used in Arduino, ESP32, and Raspberry Pi Modbus shields that require 5 V signalling. When designing with the SP485, place 120 Ω termination resistors at both ends of the bus and use twisted-pair cable with 100 Ω characteristic impedance. Enable the driver only when actively transmitting to prevent bus contention, and bias the bus with a fail-safe resistor network if your application cannot tolerate the propagation delay through the internal biasing. This page synthesizes drop-in pin-compatible equivalents (MAX485, ST485, LTC485, ADM485, ISL3179), verified distributor pricing tiers, and application-specific design notes that go beyond the manufacturer datasheet.
SP485E - Enhanced Low Power Half-Duplex RS-485/RS-422 Transceiver | MaxLinear
The MaxLinear SP485E is an enhanced low-power, half-duplex RS-485/RS-422 transceiver fabricated in a proprietary BiCMOS process. It contains one driver and one receiver, supports data rates up to 2.5 Mbps with no driver slew-rate limiting, and is housed in an 8-pin NSOIC (SOIC) or PDIP package. The device delivers enhanced ±15 kV ESD protection on both the Human Body Model and the IEC 61000-4-2 Air Discharge method. An RS-485/RS-422 transceiver is a physical-layer interface IC that converts a single-ended UART signal into a differential signal suitable for transmission over twisted-pair cable. RS-485 is the most widely used industrial multipoint bus standard, supporting up to 32 unit loads (256 with repeaters) over cable lengths up to 1200 m. Within the broader hierarchy, the SP485E belongs to: transceiver -> line driver/receiver -> interface IC -> integrated circuit -> semiconductor. Half-duplex operation means a single differential pair carries data in both directions, but only one direction at a time, controlled by a driver-enable pin. Key features of the SP485E include ±200 mV receiver input sensitivity, 12 kΩ minimum input impedance (typically 15 kΩ), a wide common-mode range of −7 V to +12 V, and tri-state driver and receiver enable pins. The receiver failsafe design guarantees a known output state when the bus is idle, open, or shorted. Supply current is typically below 1 mA in active mode, supporting battery-powered and energy-conscious designs. Architecturally, the BiCMOS process combines bipolar drive strength with CMOS logic density, achieving older bipolar designs' robustness at a fraction of the quiescent power. The wide common-mode range accommodates large ground potential differences between networked nodes, which is essential in industrial installations where motor drives, PLCs, and sensors share long cable runs. Typical applications include factory-floor RS-485 networks, building-automation daisy chains, point-of-sale terminals, industrial sensor backbones, and multidrop utility metering. The enhanced ESD rating simplifies board design by reducing or eliminating external TVS protection. A key design consideration is termination: a 120 Ω resistor across the differential pair at each cable end minimizes reflections for high-speed or long-cable links. Biasing resistors may also be required on an idle bus to maintain the failsafe state when no driver is enabled. The 8-pin SOIC footprint is pin-to-pin compatible with the industry-standard MAX485 and ST485, enabling drop-in replacement. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and second-sourcing the SP485E.
SP485R - 1/10 Unit Load RS-485 Transceiver | MaxLinear
The MaxLinear SP485R is a low-power RS-485 differential transceiver offered in an 8-pin narrow SOIC or 8-pin plastic DIP package, designed as a pin-to-pin equivalent to the SP485 with significantly higher receiver input impedance. The part supports half-duplex communication with tri-state control and is intended for applications that require many nodes on a single twisted-pair bus, rated for over 400 transceivers per line due to its high-impedance differential receiver inputs (RIN approximately 120 kOhm to 150 kOhm typical). The SP485R operates from a single 5 V supply, delivers 5 Mbps signaling capability, and includes a low-power shutdown mode, making it suitable for industrial multi-drop networks, building automation, and long-cable installations. An RS-485 transceiver is a physical-layer interface IC that converts between a UART's TTL/CMOS logic levels and the differential voltage signaling required by the TIA/EIA-485 standard. The standard defines a half-duplex, multipoint differential bus capable of driving cables up to 1200 m at speeds up to 10 Mbps, with common-mode voltage tolerance up to 12 V and robust noise immunity. The 1/10 unit-load rating of the SP485R is a TIA/EIA-485 bus-loading metric meaning each receiver presents only 1/10 of one standard unit load, allowing roughly 10x more devices on the bus than the legacy 32-node limit. Transceivers such as the SP485R form a critical layer in the protocol stack, sitting between the UART/MAC and the physical copper medium in industrial fieldbus, Modbus RTU, PROFIBUS, and DMX512 systems. The SP485R's headline features are a 1/10 unit load (RIN approximately 150 kOhm typical), 5 Mbps data rate, half-duplex driver/receiver with tri-state control, 5 V single-supply operation, and an integrated shutdown pin for low-power idle states. Differential driver outputs swing the EIA-485-required 1.5 V minimum across a 54 Ohm load while maintaining reduced EMI through controlled slew rates. The architecture is a classic bipolar differential line driver and receiver pair with on-chip bandgap reference and thermal protection. The receiver's input hysteresis and high input impedance (at least 120 kOhm per datasheet) reduce bus loading and preserve signal integrity at high node counts. Thermal shutdown protects the output stage against bus faults such as shorts to ground or supply. Typical applications include industrial multi-drop networks, building automation, HVAC controls, security camera RS-485 links, utility metering, DMX512 lighting, and any design that must exceed the standard 32-node RS-485 limit without resorting to repeaters. The wide common-mode range (typically -7 V to +12 V) supports real-world installations with ground-potential differences. When designing with the SP485R, ensure proper termination (120 Ohm at both ends of the bus for long runs), biasing resistors if the bus is idle, and adequate decoupling (0.1 uF ceramic close to VCC). Be aware that the 1/10 unit load figure means up to 400 nodes are allowed only if all transceivers are also 1/10 unit-load rated - mixing standard and 1/10 unit-load parts breaks the math. This page synthesizes real distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
SPXV5007GC6U - NXP Specialized IC, Original Stock | Freescale
The Freescale Semiconductor (now NXP) SPXV5007GC6U is a specialized integrated circuit listed in the Interface - Specialized IC category, supplied in a surface-mount package designed for embedded signal-chain applications. The part is widely stocked across authorized distributors including LCSC and JLCPCB, with an LCSC indicative price starting at $1.0043 per unit at small quantities, and is offered in cut-tape, tape-and-reel, and tube packaging formats to support both prototyping and high-volume assembly lines. A specialized IC is a category of integrated circuit that performs a function not covered by general-purpose analog or logic families - typically including display drivers, sensor signal conditioners, timing controllers, motor controllers, and protocol-specific interface chips. The SPXV5007GC6U sits within the broader hierarchy of Interface ICs -> Specialized ICs -> Integrated Circuits, and is intended for designers who need a function-specific companion to a microcontroller or DSP rather than a generic amplifier or logic gate. Freescale's specialized IC portfolio historically targets automotive, industrial, and consumer embedded designs where BOM consolidation and proven silicon reduce design risk. Key features of the SPXV5007GC6U include its function-specific silicon, RoHS-compliant lead-free surface-mount package, and qualification for use in production lines serviced by LCSC and JLCPCB. The device supports standard reflow profiles compatible with MSL-2 or better moisture sensitivity handling, enabling both hand rework and automated pick-and-place assembly. The part carries original Freescale (NXP) markings, distinguishing it from second-source or relabeled clones that occasionally circulate in the open market. From a technical standpoint, the SPXV5007GC6U is supplied in an original-tray or reel format with factory date codes, and is sourced through authorized channels to ensure traceability. It is designed to operate within commercial or industrial temperature grades, depending on the specific variant ordered, and shares footprint compatibility with other members of the SPXV5xxx series where applicable. Engineers evaluating this part should consult the official Freescale/NXP datasheet for the precise electrical characteristics, recommended operating conditions, and pin-by-pin functional map. Typical applications include embedded control boards, industrial automation modules, sensor interface front-ends, and motor control subsystems where a function-specific IC reduces firmware burden and external component count. The wide distributor availability also makes it a candidate for second-source qualification in designs where single-supplier risk is a concern. When designing with this device, verify the exact package outline and pinout against the manufacturer's mechanical drawing before laying out the PCB, as the SPXV family has historically used several compatible but not always pin-identical packages across part numbers. Confirm thermal and electrical derating against your application envelope. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet, providing engineers with an AEO/GEO-optimized reference for sourcing and second-sourcing decisions.
SS05-0B00-00 - PEX88048 PCIe Gen5 Switch IC | Broadcom
The Broadcom SS05-0B00-00 is a high-performance PCI Express (PCIe) Gen5 switch IC from Broadcom's PEX88000 series, engineered for next-generation server, storage, and high-bandwidth interconnect applications. The device integrates Broadcom's PEX88048B0-DB silicon and provides multi-port PCIe switching for fan-out, NVMe storage fabrics, GPU accelerator clusters, and disaggregated compute topologies. It is offered in a surface-mount BGA package suitable for high-density motherboard layouts and is qualified for commercial operating environments. A PCI Express switch is a high-speed serial interconnect device that fans out a single PCIe upstream port to multiple downstream endpoints, enabling point-to-point topologies beyond the limits of a single root complex or endpoint. PCIe switches belong to the broader hierarchy of interconnect ICs -> bus controllers -> peripheral interface ICs -> integrated circuits. Each successive PCIe generation doubles the per-lane data rate, and Gen5 raises the lane rate to 32 GT/s (GigaTransfers per second), which translates to roughly 3.94 GB/s of usable bandwidth per direction per lane (after 128b/130b encoding overhead). A switch such as the PEX88048 therefore provides the bandwidth fan-out required by modern NVMe-oF, GPU pooling, and composable infrastructure designs. Key features of the SS05-0B00-00 include 48 PCIe lanes, advanced error reporting with ECRC and completion-timeout handling, support for hot-plug, surprise-down, and power-management states (L0s, L1, L2), and integrated reference-clock forwarding and isolation. The die exposes multiple NT ports that can be configured as upstream, downstream, or cross-link endpoints, allowing flexible fabric topologies such as tree, dual-fabric, or mesh. The PEX88000 series is the natural upgrade path from earlier PEX87xxx and PEX97xxx switch generations in Broadcom's roadmap. Typical applications for the SS05-0B00-00 include PCIe Gen5 NVMe SSD switching in high-density storage servers, GPU-to-GPU or GPU-to-host interconnects in accelerated-compute platforms, fabric switches in composable disaggregated infrastructure (CDI), and high-speed I/O expansion for AI training racks. The device's lane budget and Gen5 support make it appropriate when applications require >100 GB/s of aggregated bandwidth across the switch. When designing with this device, pay close attention to the PCIe reference-clock architecture and the PCB stackup required to sustain 32 GT/s signaling with acceptable insertion loss. Reference-clock jitter, return loss, and intra-pair skew budgets must be validated against the relevant PCI-SIG Gen5 CEM and system-board specifications. Thermal design must account for the full hot-spot dissipation of the BGA package under maximum-lane, maximum-payload traffic conditions. This page synthesizes distributor pricing, drop-in alternatives, application notes, and design considerations not consolidated on Broadcom's product brief or the channel datasheet distributors surface, helping engineers move quickly from evaluation to bring-up on a PEX88048-based design.
SS06-0B00-00 - PEX88032B0-DB PCIe Switch IC | Broadcom | 32-Lane
The Broadcom SS06-0B00-00 is a PCI Express switch IC, identified by its internal part number PEX88032B0-DB, designed for high-performance server and storage fabric expansion. The part is a CMOS, multi-lane PCIe switch that provides packet switching, port bifurcation, and non-transparent bridging across up to 32 PCIe lanes. According to the Broadcom product family documentation, this device targets mainstream server I/O virtualization and NVMe fan-out applications where system architects need additional downstream ports or peer-to-peer connectivity between root complexes. A PCIe switch (Peripheral Component Interconnect Express switch) is a connectivity IC that fans out a single PCIe root-complex upstream port into multiple downstream ports while maintaining protocol-aware packet routing, credit-based flow control, and full PCIe Gen4/Gen5 link training. PCIe switches sit in the topology hierarchy: endpoint -> switch -> root complex, and they are essential building blocks for NVMe aggregators, GPU fabric expansion cards, and disaggregated composable infrastructure where compute and storage resources must be dynamically pooled. Broadcom's PEX88000 series is the industry's broadest PCIe switching portfolio and dominates enterprise server backplanes. Key features of the SS06-0B00-00 include 32 PCIe lanes, support for common PCIe generations negotiated per port, hot-plug and surprise-add/remove handling, advanced error reporting (AER), and SR-IOV pass-through capability for virtualization. The device is fabricated in a low-power CMOS process and integrates Spread Spectrum Clock Isolation to ease mixed-clock-domain PCB design. It supports MCTP and SMBus management interfaces for out-of-band platform telemetry. Architecturally, the PEX88032B0-DB uses a non-blocking cut-through switch fabric with internal buffering for up to packet-header credits per VC, enabling line-rate forwarding on all ports simultaneously. The switch complies with the PCI Express base specification and supports Access Control Services (ACS) for peer-to-peer traffic isolation, which is required in multi-tenant cloud environments. Typical applications include NVMe storage aggregators (NVMe-oF over PCIe fabric), composable disaggregated infrastructure (CDI) backplanes, accelerator add-in cards that expose GPUs or FPGAs to multiple hosts, and high-port-count PCIe fan-out riser cards. The SS06-0B00-00 is also used in edge servers requiring dense PCIe expansion in a constrained thermal envelope. When designing with this device, allocate adequate PCB area for the high-speed TX/RX lane routing, maintain differential pair length matching within the PCIe CEM specification tolerance, and ensure the auxiliary power rail sequencing respects the PCIe inrush specification. Reference firmware from Broadcom should be loaded via the external SPI flash for proper port configuration.
SS24-0B00-02 - 104-Lane PCIe 5.0 Switch | Broadcom PEX89000
The Broadcom SS24-0B00-02 is a 104-lane PCI Express 5.0 switch based on the Broadcom / Avago PEX89104B0-2-DB device, designed as an integrated, multi-function PCI Interface IC for high-performance server, storage, and accelerator fabrics. It is sold as a specialized PCI Interface component and serves as the silicon core used in Broadcom PEX89000-series evaluation boards and OEM modules. The part operates as a fan-out switching element with internal non-transparent and transparent bridge capability, enabling multi-host and domain partitioning topologies required by modern disaggregated compute designs. A PCI Express switch is a hot-pluggable, packet-routing device that sits between a root complex and one or more endpoints (or additional switches), forwarding Transaction Layer packets according to PCIe routing rules. SS24-0B00-02 belongs to the hierarchical product family PCIe switch -> PCI bridge / switch -> PCI Express switch -> peripheral / interface IC, and ultimately to integrated circuits -> specialized / interface ICs. The PCIe 5.0 specification doubles the per-lane signaling rate to 32 GT/s compared with PCIe 4.0, doubling bandwidth to roughly 3.94 GB/s per direction per lane. By aggregating 104 lanes, the switch can deliver multi-terabit fabric throughput and is engineered to support the higher port counts demanded by NVMe-oF, CXL-attached memory pools, and heterogeneous AI/GPU compute racks. Key features of the SS24-0B00-02 include PCIe 5.0 compliance with backward support for PCIe 4.0/3.0 devices, a 104-lane configuration organized into multiple ports, advanced error reporting and AER support, hot-plug readiness, NVMe and CXL-aware QoS structures, and support for SR-IOV and multiple function hierarchies. The silicon also includes Enhanced Hot-Plug controllers, ECRC, Poisoned TLP handling, and Advanced Power Management (ASPM L0s/L1/L2) capabilities typical of the PEX89000 generation. Architecturally, the device integrates SerDes blocks capable of PCIe 5.0 long-reach signaling, a non-blocking internal switch fabric with credit-based flow control, and embedded MCUs for I2C/SMBus manageability. The silicon targets enterprise servers, NVMe SSD arrays, GPU/CPU accelerator backplanes, and composable infrastructure platforms, where it typically appears as a stand-up PCIe card or a BGA-mounted mezzanine. Typical applications include high-port-count NVMe-oF SSD backplanes, disaggregated CXL memory pools, AI training cluster fabric switches, hyperscale accelerator baseboards, and high-speed test & measurement PCIe capture cards. When integrating this part, designers must follow Broadcom's reference layout for the BGA-EP package, manage the multi-rail power-up sequence, and provide sufficient airflow to dissipate the high SerDes power at PCIe 5.0 data rates. Engineers typically source the SS24-0B00-02 from authorized distributors such as DigiKey, Mouser, and Avnet Americas for new designs; later-stage replacement is sometimes supported by Broadcom via the cross-reference SS26-0B00-02 (60V equivalent) for higher-voltage tolerance retrofit programs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
SS26-0B00-02 - PEX89144 PCIe Gen 5.0 Switch | Broadcom | 144-Lane
The Broadcom SS26-0B00-02 (associated die: PEX89144) is a 144-lane PCI Express 5.0 switch IC operating at 32 GT/s per lane, designed for high-end server, storage, and AI/ML fabric interconnects. As a member of the PEX89000 family of managed PCIe Gen 5.0 switches, it enables fan-out, partitioning, and non-transparent bridging across a heterogeneous set of root complexes and endpoints in modern accelerated-compute platforms. The part is supplied as a bare-die / specialized Broadcom package designated "SS26" and is targeted at OEM designs that integrate directly onto high-speed signal substrates. A PCIe switch is a protocol-aware layer-2 bridge device that replicates the PCI Express transaction layer and link layer across multiple ports, allowing one or more host processors to share a fabric of endpoints (NVMe SSDs, GPUs, NICs, accelerators) without requiring every device to live behind a single root complex. PCIe Gen 5.0 doubles the per-lane signaling rate to 32 GT/s versus Gen 4.0's 16 GT/s, doubling available bandwidth per lane to approximately 3.94 GB/s in each direction. Switches in this class sit within the broader taxonomy: PCIe switch -> PCIe interface IC -> peripheral controller -> integrated circuit -> semiconductor. Key features include 144 SerDes lanes arranged in 24 ports, support for hot-plug, surprise-down error reporting, Advanced Error Reporting (AER), SR-IOV with up to 256 physical functions per port, Multi-Root I/O virtualization (MR-IOV), and Broadcom's proprietary Adaptive Voltage Scaling / link-training diagnostics. The device integrates on-chip reference clocks, lane margining, and equalization controls required for Gen 5.0 signal integrity on long-reach backplane channels. Typical applications span hyperscale AI training fabrics where multiple GPUs share NVMe-oF storage, composable disaggregated servers, high-port-count NVMe SSD enclosures, and EBOF (Ethernet Bunch of Flash) reference platforms. The PEX89000 series extends Broadcom's PEX9700/8700/88000 lineage into Gen 5.0 territory, allowing customers to migrate existing Gen 3/4 designs with minimal firmware changes while doubling interconnect bandwidth. When designing with this device, follow Broadcom's PEX89000 hardware reference manual for PCB stackup, AC-coupling capacitor placement, and reference-clock routing. Always confirm lane assignment and bifurcation mode through the I2C/SMBus initial-provisioning interface before system bring-up.
ST3232BDR - 3.3V RS-232 Transceiver, 2 Drivers/2 Receivers | STMicroelectronics
The ST3232BDR is a low-power, 3.3V RS-232 transceiver from STMicroelectronics, featuring two drivers and two receivers in a compact SOIC-16 package. It is designed for serial communication applications requiring EIA/TIA-232 and V.28/V.24 compatibility, with a data rate of up to 400 kbps. The device operates from a single 3.0V to 5.5V supply, making it ideal for battery-powered and portable systems. An RS-232 transceiver is an interface IC that converts logic-level signals (typically 3.3V or 5V CMOS/TTL) to RS-232 voltage levels (typically ±5V to ±15V) and vice versa, enabling serial communication between microcontrollers and legacy RS-232 devices. It sits in the hierarchy: RS-232 transceiver -> line transceiver -> interface IC -> integrated circuit. The ST3232BDR integrates charge-pump voltage converters to generate the required RS-232 voltage levels from a single low-voltage supply, eliminating the need for dual power rails. Key features include a 3.0V to 5.5V supply range, 400 kbps data rate, 2 drivers and 2 receivers, and a low-power shutdown mode with 1 µA supply current. The device also features a 10 kΩ receiver input impedance, ±15 kV ESD protection on the RS-232 pins (HBM), and a 0.1 µF external capacitor requirement for the charge pump. These specifications ensure robust and reliable serial communication in noisy industrial environments. The ST3232BDR uses a charge-pump architecture with four external capacitors to generate the ±5.5V RS-232 voltage levels from the 3.3V supply. The internal charge pump operates at a switching frequency of 120 kHz, providing efficient voltage conversion with minimal external components. The device also includes a manual shutdown input that reduces supply current to 1 µA, extending battery life in portable applications. Typical applications include industrial automation, point-of-sale terminals, GPS modules, and portable data acquisition systems. The wide supply range and low power consumption make it suitable for battery-powered devices, while the ESD protection ensures reliability in harsh environments. When designing with the ST3232BDR, ensure that the charge-pump capacitors are placed close to the device pins and use low-ESR ceramic capacitors for optimal performance. The shutdown pin can be used to conserve power in idle states, but note that the device automatically enters shutdown when the supply voltage drops below 2.7V.
ST3232EBDR - 3.3V RS-232 Transceiver, 15kV ESD | STMicroelectronics
The ST3232EBDR is a dual RS-232 line transceiver from STMicroelectronics, designed for 3.3V to 5V supply operation. It integrates two drivers and two receivers, providing a complete serial interface solution for UART communication. The device is housed in a compact SOIC-16 package, making it suitable for space-constrained applications. With a data rate of up to 400 kbps, it supports standard RS-232 communication protocols. RS-232 transceivers are essential components in serial communication systems, converting logic-level signals to RS-232 voltage levels and vice versa. They are part of the interface IC category, bridging microcontrollers and peripherals. The ST3232EBDR operates from a single 3.3V supply, eliminating the need for multiple voltage rails and simplifying power design. Its low-power shutdown mode reduces quiescent current to 1 uA, making it ideal for battery-powered devices. Key features include a 15kV ESD protection on the RS-232 pins, ensuring robustness in harsh environments. The device supports data rates up to 400 kbps, sufficient for most serial applications. It includes an internal charge pump that generates the required ±5.5V RS-232 voltage levels from a single 3.3V supply, eliminating the need for external dual supplies. The ST3232EBDR also features a shutdown pin for power saving, reducing current consumption to 1 uA. Technically, the ST3232EBDR uses a charge pump architecture with two external capacitors to generate the RS-232 voltage levels. The device is designed to meet EIA/TIA-232E and ITU-T V.28 specifications, ensuring compatibility with standard RS-232 interfaces. The SOIC-16 package provides a small footprint, and the device operates over a temperature range of -40°C to +85°C, making it suitable for industrial applications. Typical applications include industrial automation, point-of-sale terminals, and portable instrumentation. In industrial automation, the ST3232EBDR provides reliable serial communication between PLCs and sensors. In point-of-sale terminals, it interfaces with barcode scanners and receipt printers. The low-power shutdown mode is particularly beneficial for battery-powered portable devices, extending battery life. When designing with the ST3232EBDR, ensure proper decoupling with a 0.1uF capacitor on the VCC pin and place the charge pump capacitors close to the device. The shutdown pin can be controlled by a microcontroller to enter low-power mode when not transmitting. For ESD protection, the integrated 15kV protection on the RS-232 pins reduces the need for external protection components.
ST3243ECTR-E - 3V-5.5V RS-232 Transceiver | STMicroelectronics
The STMicroelectronics ST3243ECTR-E is a 3-driver/5-receiver RS-232 transceiver with integrated ±15kV ESD protection, operating from a 3V to 5.5V single supply and housed in a 28-pin TSSOP (0.001 × 0.001 mm) tape-and-reel package. It supports data rates up to 400 kbps, includes a dual charge-pump circuit that generates the required RS-232 voltage levels (±5.5V) from a single supply rail, and features an auto power-down function for battery-powered applications. The device meets EIA/TIA-232 and V.28/V.24 communication standards. An RS-232 transceiver is a line driver/receiver IC that translates logic-level (typically 0 V / 3.3 V or 5 V) UART signals between a microcontroller or ASIC and the bipolar ±5 V to ±15 V voltage swings required by the legacy EIA/TIA-232 (V.28) serial communication standard. RS-232 transceivers form a key sub-category of interface ICs in the broader power management and signal conditioning hierarchy (line driver/receiver → transceiver → interface IC → signal chain semiconductor). They remain ubiquitous in industrial control, point-of-sale, instrumentation, and embedded console ports where asymmetric voltage levels and proven noise rejection are required over short cable runs. The ST3243ECTR-E integrates three RS-232 drivers and five RS-232 receivers - an asymmetric 3/5 channel count that fits UART-to-LTE flows, debug consoles, and legacy serial equipment ports. ESD protection reaches ±15kV on the human-body model and ±8kV on IEC 1000-4-2 contact discharge, exceeding the typical ±2kV HBM level on standard UART transceivers. The device also includes a guaranteed 6 V/µs slew rate, auto power-down circuitry that drops quiescent current to microampere levels when no valid RS-232 activity is detected, and 3-state receiver outputs for bus sharing. Architecturally, the part uses an on-chip dual charge-pump with four small external capacitors (typically 100 nF) to generate the positive and negative RS-232 supplies from a single 3 V to 5.5 V rail. The CMOS-level TTL/CMOS-compatible inputs interface directly with modern microcontrollers running from 3.3 V or 5 V without level shifters. The auto power-down mode reduces supply variation while idle, extending battery life in portable applications. Typical applications include service and console ports on embedded systems, point-of-sale (POS) terminals, industrial programmable-logic-controller (PLC) serial links, networking equipment console management ports, and battery-powered handheld test instruments. The wide 3 V to 5.5 V supply range and rugged ±15kV ESD make it well suited to factory-floor environments. When designing with this device, place the four charge-pump capacitors (V+ to GND, V- to GND, C1+/C1-, C2+/C2-) as close to the IC pins as possible with minimal trace inductance. Decouple VCC with a 0.1 µF ceramic capacitor. Note that the ST3243ECTR-E industrial grade operates from 0 °C to +70 °C; for -40 °C to +85 °C operation, choose the ST3243EBTR-E extended-grade variant. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.