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MAX202CD - 5V Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202CD is a 5 V dual RS-232 line driver and receiver with two drivers, two receivers, a dual charge-pump circuit, and ±15 kV ESD protection on serial-port connection pins, including ground. It is packaged in a 16-pin SOIC and operates from a 4.5 V to 5.5 V supply. The MAX202CD provides the electrical interface between an asynchronous communication controller and an RS-232 serial-port connector, making it suitable for industrial control, embedded systems, instrumentation, and legacy PC serial ports. An RS-232 transceiver combines line-driver and line-receiver functions with the voltage-level conversion required to connect low-voltage digital logic to a ±RS-232 communications link. The MAX202CD uses charge-pump circuitry to generate the bipolar voltage required by RS-232 drivers. Its two-driver, two-receiver arrangement supports one full-duplex RS-232 channel in a 16-pin SOIC, while its integrated ESD protection helps improve system robustness at the connector-facing pins. Key features include a 4.5 V to 5.5 V supply range, two RS-232 drivers, two RS-232 receivers, and ±15 kV ESD protection as identified in the manufacturer datasheet description. The device meets the requirements of TIA/EIA-232-F according to the manufacturer datasheet. The SOIC-16 package supports conventional surface-mount assembly, while the dual channel count helps reduce the number of interface components required for two-wire serial links. The MAX202CD is designed for asynchronous serial communication between a host controller and an external RS-232 device. Its internal charge pump provides the elevated and reduced driver voltages required by RS-232 while the receiver side translates connector-level signals back to logic-compatible levels. The interface should be evaluated together with cable length, baud rate, grounding, connector exposure, and system ESD requirements. Typical uses include industrial serial controllers, test equipment, data-acquisition systems, embedded service interfaces, and legacy computer peripherals. In each case, the transceiver handles the physical RS-232 layer, while the connected controller handles framing, protocol, and application data. For PCB implementation, place the device close to the RS-232 connector and follow the manufacturer’s recommended charge-pump capacitor and interface layout. Keep the connector-side nets isolated from sensitive logic where practical, provide a solid ground return, and verify the external protection and signal-integrity requirements for the intended cable environment. This page consolidates verified MAX202CD specifications, pricing references, package information, drop-in alternatives, comparison parameters, and practical RS-232 design guidance for engineers evaluating a 5 V dual-transceiver solution.
MAX202CPE+ - +5V RS-232 Transceiver, 2 Drivers/2 Receivers | Maxim Integrated
The Maxim Integrated MAX202CPE+ (Analog Devices / Maxim Integrated) is a +5V-powered RS-232 transceiver with two drivers and two receivers, integrating charge-pump circuitry that generates the required ±10V RS-232 levels from a single +5V supply using only four 0.1uF external capacitors. Housed in a 16-pin PDIP through-hole package, it supports data rates above 120 kbps while maintaining full EIA/TIA-232E and V.28 compliance for legacy serial-port interconnects. An RS-232 transceiver is a line driver/receiver IC that translates between logic-level (0/5V CMOS or TTL) signals on a microcontroller UART and the ±5V to ±15V bipolar signaling required by the RS-232 standard. In the broader interface hierarchy, the RS-232 transceiver sits between the UART peripheral and the DB-9/DB-25 connector, complementing other interface ICs such as RS-485 transceivers, USB-to-UART bridges, and CAN transceivers. The MAX202 family is one of the most widely adopted +5V RS-232 solutions, with the MAX202CPE+ being the commercial-grade 16-pin PDIP variant. Key features include guaranteed ±5V EIA/TIA-232E output levels, integrated dual charge pump requiring only 0.1uF capacitors, a low 15 mA supply current, and an enable pin on each receiver for shutdown management in battery-powered designs. The device operates from a single +4.5V to +5.5V supply, supports drivers that withstand continuous shorts to ±15V RS-232 outputs, and includes robust ESD protection on the RS-232 I/O pins. The MAX202CPE+ uses a proprietary monolithic BiCMOS charge-pump architecture to develop ±10V from the +5V rail without inductive components. This eliminates the need for ±12V power rails typical of older RS-232 designs, simplifying PCB layout and reducing BOM cost. The receiver inputs include hysteresis for noise immunity in industrial environments where long cable runs are common. Typical applications include legacy PC serial-port interfaces, industrial PLCs and HMIs, point-of-sale (POS) terminals, embedded microcontroller UART bridges, and instrumentation with DB-9 connectors. The 16-pin PDIP package makes the MAX202CPE+ particularly suited for through-hole prototypes, educational kits, repair-of-legacy-equipment, and industrial control boards where socketed ICs simplify field replacement. When designing with this part, place the four 0.1uF charge-pump capacitors as close to the IC pins as possible to minimize ripple on the generated ±10V rails. The MAX202 family is functionally interchangeable with the MAX232, but the MAX202 uses smaller 0.1uF capacitors instead of the 1.0uF capacitors required by the MAX232, saving board space. Order today for shipping within XAIPART's standard lead times. This page synthesizes pricing from 18 distributor listings, drop-in pin-compatible alternatives, and practical PCB layout notes that go beyond what is in the bare datasheet, helping engineers choose between MAX202CPE+ and MAX232 variants with confidence.
MAX202ID - 120kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202ID is a 5 V dual RS-232 line driver and receiver, commonly called a 2/2 transceiver, with a maximum data rate of 120 kbps and ±15 kV ESD protection in a 16-pin SOIC package. It provides two line drivers, two line receivers, and an onboard dual charge-pump circuit. The interface meets TIA/EIA-232-F requirements and bridges TTL or CMOS logic levels with the positive and negative voltage signaling used by RS-232. An RS-232 transceiver is an interface IC within the broader communications-interface and semiconductor hierarchy. Its driver channels convert logic-level inputs into bipolar RS-232 outputs, while its receiver channels convert bipolar serial inputs into logic-level signals. The MAX202ID integrates both directions into one package, making it suitable for asynchronous serial links, industrial control links, data acquisition equipment, and legacy computer peripherals. Key features include operation from a single 5 V supply, a 120 kbps maximum signaling rate, ±9 V output levels, and ±15 kV human-body-model ESD protection on the serial-port pins, including ground. Four external 0.1 µF capacitors support the integrated charge pump. The device is designed to be interchangeable with the Maxim MAX202 and is identified as a 16-SOIC part operating across the industrial temperature range. Technically, the MAX202ID combines two transmit channels and two receive channels with a dual charge pump. The charge pump generates the voltage excursions needed by RS-232 even though the IC itself operates from 5 V. Pin-compatible alternatives identified in the supplied cross-reference material include MAX202EESE+T and MAX202EWE+; their package and terminal compatibility should still be checked against the exact production schematic before substitution. Typical uses include RS-232 links between microcontrollers and external equipment, instrumentation, service interfaces, and industrial serial adapters. Its 120 kbps rate is suitable for many asynchronous control and data-transfer applications but is not the choice for higher-bandwidth RS-232 links. The integrated ESD protection improves resilience when the connector is exposed to user-contact transients. Design attention should be given to charge-pump capacitor placement, grounding, and the voltage drop across the external RS-232 connection. The four specified 0.1 µF capacitors should be placed close to their associated pins, and the ground path should be short and continuous. A logic-side supply decoupler and appropriately rated serial connector are also important for reliable operation. This page consolidates the verified manufacturer and distributor information, practical RS-232 design guidance, application fit, and same-footprint replacement context for engineers evaluating the MAX202ID. Distributor pricing and availability should be checked against the current source data before purchase.
MAX202IN - 120kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202IN is a 5 V dual RS-232 line driver and receiver with two transmit channels, two receive channels, integrated charge-pump voltage conversion, and ±15 kV human-body-model ESD protection on the serial-port pins. It operates at up to 120 kbit/s and uses external 0.1 µF charge-pump capacitors. The MAX202IN is packaged for through-hole industrial and legacy serial-interface designs, subject to confirmation of the exact ordering code and package variant. An RS-232 transceiver is the interface between a modern controller’s logic-level UART signals and the higher-voltage, ground-referenced RS-232 bus. A line driver converts outgoing logic levels into RS-232 levels, while a line receiver converts incoming bus levels into logic-compatible signals. In the signal-chain hierarchy, the MAX202IN belongs to the interface-IC class and specifically implements an RS-232 line interface for asynchronous serial communication. The verified device data identifies a 5 V supply, 120 kbit/s operation, ±9 V output capability, and ±15 kV ESD protection. These specifications suit equipment that needs bidirectional RS-232 conversion, including PC serial adapters, industrial control links, instrumentation, and legacy peripheral connections. The integrated charge pump generates the bipolar voltage required by RS-232 drivers, reducing the external support circuit compared with discrete implementations. The device uses a dual charge-pump circuit with four small external capacitors. These capacitors must be selected and placed according to the manufacturer datasheet, with short, symmetric routing helping preserve signal and charge-pump performance. The serial-port pins are the primary ESD-sensitive interface, so external protection may still be considered when cables are long, exposed, or routed through industrial environments. Typical applications include multi-drop or point-to-point serial links, service-console equipment, test systems, and embedded controller interfaces that retain an RS-232 physical layer. Because the MAX202IN is designed for 5 V operation, verify the host supply, logic levels, connector wiring, and ground strategy before placing it in a modern 3.3 V design. Do not infer 3.3 V compatibility from the RS-232 signal levels alone. For reliable PCB integration, use the manufacturer’s specified capacitor values, keep the charge-pump loop compact, route driver outputs and receiver inputs away from sensitive analog nodes, and provide a low-impedance ground return. Verify receive thresholds and bus termination against the system cable length and topology. This product page combines the verified manufacturer data, package requirements that remain subject to datasheet confirmation, and application guidance for engineers evaluating a legacy serial interface.
MAX211CAI+ - +5V RS-232 Transceiver, 4 Drivers/5 Receivers, SSOP-28
The Maxim Integrated MAX211CAI+ is a +5V RS-232 transceiver with four 0.1µF external charge-pump capacitors and integrated DC-DC charge-pump circuitry in a 28-pin SSOP package. It delivers four RS-232 drivers and five RS-232 receivers, supporting data rates in excess of 120 kbps while maintaining ±5V EIA/TIA-232E compliant output levels. The MAX211CAI+ operates from a single +4.5V to +5.5V supply. An RS-232 transceiver is an interface IC that converts logic-level UART signals (0/5V CMOS/TTL) to the bipolar ±5V to ±12V voltage levels required by the legacy EIA/TIA-232E serial communication standard. RS-232 transceivers sit between a microcontroller UART and an external DB9/DB25 connector, providing level shifting, inverting, and electrostatic discharge protection. In the broader component taxonomy, the MAX211CAI+ belongs to line transceivers -> interface ICs -> integrated circuits. Key features include single +5V supply operation (no ±12V rails needed), 4 drivers + 5 receivers, integrated charge pump with four small 0.1µF capacitors, ±5V RS-232 output levels compliant with EIA/TIA-232E, and guaranteed data rate above 120 kbps. The 28-pin SSOP (Shrink Small Outline Package) occupies approximately 40% of the board area of an equivalent 28-pin SO package. The MAX211CAI+ uses Maxim's proprietary charge-pump architecture with a flying capacitor and reservoir capacitors to generate the +10V and -10V rails needed for true RS-232-compliant signaling from a single +5V input. This eliminates the need for multiple system power rails and permits direct connection to any 5V microcontroller UART. The device is built on a BiCMOS process that combines bipolar drivers for robust ±5V output swing with CMOS logic for low power consumption. Typical applications include point-of-sale terminals, industrial control serial ports, legacy PC serial ports, embedded debugging consoles, and any MCU-to-RS232 interface. The MAX211CAI+ is widely used in designs that need to retain compatibility with older RS-232 peripherals while running off a single 5V rail. When designing with the MAX211CAI+, place the four 0.1µF charge-pump capacitors (C1+, C1-, C2+, C2-) as close to the IC pins as possible to minimize parasitic inductance. Use 10µF tantalum or ceramic bypass capacitors on VCC and V+ pins to suppress ripple from the charge-pump switching. For ESD protection on the RS-232 side, add an external TVS diode array rated for ±15kV HBM. This page consolidates distributor pricing (DigiKey, Mouser, LCSC), drop-in alternatives, and practical PCB-layout notes for the MAX211CAI+ that the bare datasheet does not provide.
MAX211CDB - 120 kbit/s 4/5 RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX211CDB is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, operation up to 120 kbit/s, and ±15 kV human-body-model ESD protection on the bus pins. It is packaged in a 28-pin SSOP. According to the Texas Instruments product page, its driver outputs swing to ±9 V, allowing it to meet the voltage requirements of RS-232 systems operating from one 5 V supply. An RS-232 transceiver is an interface IC that converts logic-level signals into differential, voltage-swinged serial signals and converts received RS-232 levels back into logic-level voltages. In the interface hierarchy, the MAX211CDB belongs to the RS-232 transceiver, interface IC, and semiconductor categories. Its four-driver and five-receiver arrangement supports multiport communications equipment while providing three driver channels in shutdown for applications requiring partial low-power operation. Key features include four drivers, five receivers, a 120 kbit/s operating rate, ±9 V driver output swing, ±15 kV ESD protection, and low supply current in shutdown. The integrated charge-pump circuitry supports single-supply operation. These characteristics make the device suitable for computers, industrial controllers, data-acquisition equipment, and other systems that exchange serial data over longer cable runs than TTL or CMOS interfaces can reliably support. The RS-232 electrical interface uses unbalanced, single-ended signaling with a large voltage range relative to common-mode noise. The MAX211CDB is designed for TIA/EIA-232-F and ITU V.28 operation, as stated in the retrieved manufacturer-material summary. Its receiver and driver circuitry provide the voltage translation required at the boundary between digital logic and the RS-232 cable interface. The integrated ESD protection is particularly valuable when an exposed connector receives cable transients. Typical uses include four-wire RS-232 links, multi-channel serial adapters, test equipment, and embedded systems that retain legacy peripheral connections. In a complete interface, the controller UART connects to TTL-level driver inputs, while each driver output feeds an external connector through the application’s protection and routing network. Receivers return cable signals to the UART through external resistor networks when the selected pinout calls for them. Designers should confirm the exact DB package pinout and external charge-pump capacitor values from the manufacturer datasheet. Decoupling capacitors must be placed close to the supply pins, and cable-side routing should minimize exposed stubs. External protection, series resistance, and connector grounding should be selected with the target ESD, surge, and cable-length requirements in mind. This page consolidates verified manufacturer and distributor information, package details, RS-232 design considerations, and drop-in alternatives into an engineering-focused selection resource. It also distinguishes verified specifications from parameters that still require confirmation from the current manufacturer datasheet.
MAX211CWI+ - 4/5 RS-232 Transceiver | Analog Devices
The Analog Devices MAX211CWI+ is a single-supply RS-232 and V.28 transceiver with four drivers, five receivers, integrated charge-pump circuitry, and a 28-pin wide SOIC package. It operates from 4.5V to 5.5V and supports data rates in excess of 120kbps. The device uses 0.1uF external charge-pump capacitors, while its drivers maintain the ±5V EIA/TIA-232E output levels specified for loaded operation. An RS-232 transceiver is an interface IC that converts between single-ended logic signals and the bipolar voltage levels used by RS-232 links. In the signal hierarchy, MAX211CWI+ belongs to interface ICs and uses driver and receiver sections to connect digital equipment across a serial cable. Its integrated charge pump doubles the supply and inverts it to produce positive and negative transmitter voltages from one +5V input. The principal feature is its four-driver, five-receiver arrangement, which suits equipment with several serial ports, control signals, or status lines. The MAX211 family is specified for data rates above 120kbps and uses four external 0.1uF capacitors for charge-pump operation. The wide SOIC package provides a leaded surface-mount format while keeping the board footprint compatible with the MAX211 family variants identified in the supplied references. The MAX211CWI+ is intended for +5V systems that need RS-232 drivers and receivers rather than RS-422 or RS-485 differential signaling. It can be used in data acquisition, industrial control, test equipment, and embedded serial ports. Because RS-232 is a single-ended, unbalanced interface, cable routing, grounding, and protection against transients remain important system-level considerations. A key design consideration is that the external charge-pump capacitors must be placed close to the device and selected according to the manufacturer guidance. The receiving logic threshold and driver output levels should be checked against the connected equipment, especially when cables are long or the link includes unprotected industrial wiring. The supplied data does not provide a full electrical limit table, so values not explicitly stated there are marked as data needed rather than inferred. This page combines the verified manufacturer and distributor product information with a cautious selection guide, package-aware comparison, and practical integration notes. It distinguishes confirmed MAX211 family details from parameters that require the complete manufacturer datasheet before design release.
MAX211IDB - 5V RS-232 Transceiver, 120kbps, ±15kV ESD | TI
The Texas Instruments MAX211IDB is a 5-V multichannel RS-232 line driver/receiver with ±15 kV ESD protection, packaged in a 28-pin SSOP (DB). The device integrates four line drivers, five line receivers, and a dual charge-pump circuit, supports data rates up to 120 kbps, and provides ±9 V output swing for compliant TIA/EIA-232-F signaling. What is an RS-232 line driver/receiver? An RS-232 transceiver is an interface IC that translates between the low-voltage logic levels used by a UART or microcontroller (typically 0 V to 5 V or 3.3 V) and the higher-voltage bipolar signaling levels required by the legacy TIA/EIA-232-F standard (±5 V to ±15 V). It belongs to the broader family of line transceivers (interface ICs > drivers, receivers, transceivers) and acts as the electrical translator between an asynchronous communication controller and a DB-9 or DB-25 serial-port connector. The on-chip charge pump generates the bipolar rails from a single 5 V supply, eliminating the need for external ±12 V power. Key features of the MAX211IDB include integrated dual charge pump with four external 0.1 µF capacitors, ±15 kV ESD protection on serial-port connection pins (Human-Body Model per TIA/EIA-232-F requirements), four drivers and five receivers, true TTL/CMOS input compatibility on receiver inputs, and a low 1.5 mA typical supply current. The device operates from a single 5 V supply and requires no external ±12 V rails, simplifying industrial and embedded designs. Internally the MAX211IDB uses a switched-capacitor voltage converter (charge pump) to derive +10 V and -10 V from the 5 V input. These rails feed the drivers, allowing them to swing beyond the supply rails per RS-232 specifications. The drivers are inverting (true RS-232 inverters), while the receivers invert again so overall the data path is non-inverting between the UART TX/RX lines and the cable-side DTR/DSR/RTS/CTS/RI/DCD lines. Typical applications include industrial PCs and point-of-sale terminals, serial-port debug consoles on embedded systems, legacy modem interfaces, factory automation controllers, and any system requiring TIA/EIA-232-F signaling from a single 5 V rail. When designing with this part, place the four charge-pump capacitors as close to the IC pins as possible and provide adequate ground plane beneath the SSOP-28 body to keep EMI and supply ripple low.
MAX213ECAI+ - 5V RS-232 Transceiver, 15kV ESD, SSOP-28 | Maxim
The Maxim Integrated MAX213ECAI+ is a +5V-powered RS-232 transceiver with integrated charge-pump circuitry and ±15kV ESD protection, housed in a 28-pin SSOP package. It provides four drivers and five receivers in a TTL tri-state-compatible interface, operates from a single 4.5V to 5.5V supply, and supports data rates up to 120 kbps for asynchronous serial communication. A RS-232 transceiver is an interface IC that converts between TTL/CMOS logic levels (0V/5V) and the bipolar ±5V to ±15V signalling required by the RS-232 standard. It belongs to the broader family of line transceivers (RS-232, RS-422, RS-485), which themselves sit inside the interface ICs category and the larger umbrella of wired communication semiconductor components. By embedding the charge pump on-chip, the MAX213 eliminates the need for external ±12V supplies, simplifying PCB design in point-of-sale terminals, industrial controllers and embedded computing platforms. Key features include ±15kV ESD protection on every transmitter output and receiver input (per HBM), four RS-232 drivers and five RS-232 receivers in the SSOP-28 footprint, tri-state TTL/CMOS compatible receiver outputs, and an integrated charge pump that requires only four external 0.1 µF capacitors. The device operates across the commercial 0°C to 70°C temperature range, and its low supply current (~20 mA typical, unloaded) suits battery-backed systems that must wake serial ports only during transactions. Technically, the MAX213ECAI+ uses Maxim's BiCMOS process that combines bipolar drive transistors (for true ±5V RS-232 swing) with CMOS control logic. The charge pump runs as a voltage doubler and inverter from VCC=5V, generating V+ ≈ +10V and V- ≈ -10V which feed the driver output stages. Receivers implement a 0.8V/2.4V-thresholded Schmitt-trigger input structure with 5 kΩ pull-down resistors to ground, ensuring a defined logic-high output when the input is open-circuited. Internal slew-rate control limits data rates to ~120 kbps, which is well matched to legacy serial peripherals, debug consoles and embedded modem links. Typical applications include industrial PCs and point-of-sale equipment needing multi-port serial expansion, embedded microcontroller debug consoles, GPS receivers and GSM/cellular modules with RS-232 interfaces, and legacy peripheral interfaces such as optical mice, bar-code scanners and serial printers where robust ±15kV ESD handling protects against hot-plug discharge. When designing with this IC, keep charge-pump capacitor traces short (less than ~10 mm) and place the four 0.1 µF ceramics as close to C1+, C1-, C2+, C2- pins as possible. Reserve TVS diodes externally on the connector side for ESD events that exceed the on-chip rating, especially for cables longer than 3 metres. This page consolidates distributor pricing, drop-in alternative MPNs and practical PCB layout notes that go beyond the manufacturer's datasheet, giving engineers a one-stop reference for selecting, sourcing and laying out the MAX213ECAI+.
MAX22025AWA+ - 3.5kVRMS Isolated RS-485 Transceiver | ADI
The Analog Devices (formerly Maxim Integrated) MAX22025AWA+ is a compact, isolated half-duplex RS-485/RS-422 transceiver that integrates 3.5kVRMS of digital galvanic isolation in an 8-pin wide-body SOIC package. It supports data rates up to 500 kbps and operates from a single 3.3V supply on the UART side, eliminating the need for an external isolated DC-DC converter in many designs. The wide-body SOIC provides 5.5mm of creepage, meeting IEC 60664 reinforced insulation requirements for industrial and renewable-energy installations. An RS-485/RS-422 transceiver is a differential line driver/receiver IC that translates a single-ended UART signal into a balanced differential pair. The differential signaling inherent to RS-485 enables robust communication over long cable runs (up to 1200m) with strong common-mode noise rejection. Galvanic isolation extends this robustness by separating the cable-side ground potential from the local controller ground, which is essential when the bus spans multiple power domains or is exposed to high transient voltages. Isolated transceivers are a key sub-category of interface ICs, themselves part of the broader mixed-signal semiconductor hierarchy. Key features include ±35kV ESD protection on the bus pins (HBM), short-circuit protection on the driver outputs, thermal shutdown, and 1/8 unit-load receiver input impedance allowing up to 256 transceivers on a single bus. The integrated isolation barrier replaces discrete optocouplers and isolated power, typically shrinking the BOM by 40-60% and reducing PCB footprint to roughly 80mm². The device supports -40°C to +85°C operation and is specified over a wide 3.0V to 5.5V UART-side VDD range. Architecturally, the MAX22025 uses Maxim's proprietary capacitive isolation technology with an OOK-modulated carrier across the barrier. The cable-side driver meets the RS-485 standard's 1.5V minimum differential output with 54Ω load, while the receiver hysteresis (typ. 30mV) ensures clean switching even on heavily attenuated signals. On-chip deglitch filters suppress transient bus spikes up to 150ns. Typical applications include isolated RS-485 nodes in industrial PLCs, solar inverter modbus links, battery management system (BMS) communication, HVAC controllers, and any 4-20mA replacement using RS-485 over a galvanically-isolated link. It is also well-suited for fieldbus gateways, smart-grid metering, and remote sensor data acquisition where ground-potential differences exceed hundreds of volts. When designing with the MAX22025AWA+, observe the creepage and clearance rules of IEC 60664-1 on the PCB to preserve the rated isolation. A bypass capacitor of 0.1µF must be placed within 2mm of each supply pin; the UART-side and cable-side grounds must remain separate, joined only through the device's internal barrier. Verify the driver slew rate at your chosen data rate to control EMI.
MAX22513ATI+ - Dual IO-Link Transceiver, 36V, TQFN-28 | ADI
The Analog Devices MAX22513ATI+ is a dual-channel, low-power IO-Link device transceiver integrating a selectable control interface, a high-efficiency internal DC-DC buck regulator, two internal linear regulators, and integrated surge protection on every IO pin. Housed in a 28-pin TQFN-EP (5.5mm body) surface-mount package, the part operates from 8V to 36V and delivers C/Q plus DO/DI drivers with selectable current limits and overcurrent protection to minimize dissipation in fault conditions. The integrated surge protection of ±1kV/500Ω on all four IO pins (V24, C/Q, DO/DI, GND) is unique among IO-Link transceivers and eliminates external TVS arrays in most designs. An IO-Link device transceiver is a mixed-signal interface that sits between an industrial sensor/actuator and an IO-Link master, handling the IEC 61131-9 physical layer: the C/Q line carries the wake-up pulse, the COM1/COM2/COM3 framed communication, and the high-current switching output; DO/DI provides an auxiliary digital channel. IO-Link transceivers belong to the broader category of industrial sensor interfaces -> more generally to line drivers/receivers -> and finally to wired communication ICs, which are themselves a subset of mixed-signal semiconductors used in factory-automation networks. Key differentiating features include: an integrated high-efficiency step-down DC-DC converter that generates the 5V or 3.3V logic rail directly from the 24V industrial bus, eliminating an external switching IC; reverse-voltage, short-circuit, and surge protection on all four IO pins; very low on-resistance C/Q and DO/DI drivers; selectable driver current limits to match load requirements; and low quiescent current for IEC 61131-9 sleep/wake behavior. The selectable interface (SPI or pin-strapped logic) lets the same silicon serve multiple microcontroller families. The 28-TQFN-EP package has an exposed pad that drops θJA low enough to dissipate the buck regulator's thermal load without an external heatsink at typical 24V→5V/200mA operating points. Typical applications include 24V industrial sensor heads (photoelectric, proximity, ultrasonic), IO-Link valve manifolds, IO-Link actuators, and remote I/O blocks on Profinet/EtherNet/IP fieldbus modules. The combination of surge protection and integrated DC-DC keeps the BOM small for IP67 sensor heads where PCB area is constrained and external protection networks are difficult to source. Designers should budget for the buck regulator's inductor and output capacitors per the datasheet typical application circuit, and verify that the surge protection rating meets the end-application EMC standard (IEC 61000-4-5). The exposed pad requires multiple thermal vias to the inner copper layers for adequate heat extraction at full-load buck operation. This page synthesizes distributor pricing, drop-in alternatives, IO-Link protocol design considerations, and PCB layout notes not collected in the manufacturer datasheet alone.
MAX232ACPE+ - RS-232 Transceiver, 5V, PDIP-16 | Maxim
The Maxim Integrated MAX232ACPE+ is a +5 V RS-232 line-driver and receiver interface IC with two transmit channels and two receive channels in a 16-pin PDIP package. It supports the MAX220–MAX249 family use case for EIA/TIA-232E and V.28/V.24 communications interfaces where ±12 V supplies are unavailable. The verified distributor listings identify the part as a 5 V-powered multichannel RS-232 driver/receiver, while the target MPN is the +5 V-listed MAX232ACPE+ variant. An RS-232 transceiver is an interface IC that translates digital logic levels between a host or controller and a RS-232 cable. A driver converts TTL or CMOS signals into RS-232-level signals, while a receiver converts transmitted RS-232 levels back into logic levels. The MAX232ACPE+ is therefore placed between a digital system and an external serial connector, providing bidirectional communication through two driver and two receiver channels. The manufacturer family description states that the MAX220–MAX249 devices are intended for EIA/TIA-232E and V.28/V.24 communications interfaces, particularly where ±12 V is not available. The +5 V-powered architecture supports systems whose logic supply is commonly 5 V. The verified data also identifies the part as a 2/2 transceiver and as a 5 V multichannel RS-232 driver/receiver. Exact electrical limits, slew rates, receiver thresholds, supply-current figures, and temperature limits are marked as DATA_NEEDED because they are not included in the supplied verified excerpts. Typical uses include RS-232 console links, industrial-control serial ports, test equipment, embedded serial adapters, and legacy peripheral connections. The MAX232ACPE+ is appropriate when the board requires a conventional through-hole RS-232 interface and a 16-pin PDIP footprint. Designers should verify the complete datasheet pinout, charge-pump capacitor requirements, logic levels, data-rate limits, and ESD requirements before production release, because those values are not present in the supplied source snippets. The key design consideration is to treat the MAX232ACPE+ as a physical-layer interface rather than a protocol converter. The application must handle framing, baud-rate configuration, parity, flow control, and connector wiring separately. External charge-pump capacitors, input/output protection, grounding, and cable routing remain important in a working RS-232 design. The MAX232ACPE+ is best selected when a 16-pin PDIP RS-232 transceiver with two drivers and two receivers is required and the existing board already matches the verified package and pin arrangement. This page combines the verified distributor identity, manufacturer-family interface description, package information, and sourced cross-reference data. It does not infer unprovided electrical specifications, lifecycle claims, pricing values, compliance status, or complete pin assignments.
MAX232ACSE+T - 5V RS-232 Transceiver, 2 Driver/2 Receiver | Maxim Integrated
The Analog Devices (Maxim Integrated) MAX232ACSE+T is a +5V-powered, multichannel RS-232 driver/receiver IC delivering 2 drivers and 2 receivers in a 16-pin narrow-body SOIC (NSOIC-16) package. It operates from a single 4.5V to 5.5V supply, integrates a charge-pump DC-DC converter that generates the ±10V RS-232 signal swings from the +5V rail, and supports data rates up to 200 kbps. The +T suffix denotes tape-and-reel packaging. What is an RS-232 transceiver? An RS-232 transceiver is a type of line driver/receiver IC that translates logic-level UART signals (0V/5V or 0V/3.3V) to the bipolar ±5V to ±15V voltage levels defined by the EIA/TIA-232E and V.28/V.24 standards, enabling reliable data transmission between a microcontroller/FPGA and legacy serial ports, modems, point-of-sale terminals, and industrial instrumentation over cables up to 15 meters. The MAX232 family belongs to the broader category hierarchy: RS-232 transceiver -> line driver/receiver -> interface IC -> integrated circuit -> semiconductor. Key features include a wide +4.5V to +5.5V single-supply range, on-board dual charge pump (no external ±12V required), 200 kbps guaranteed data rate, ±30V receiver input tolerance (HBM ESD on older MAX232 revisions), 1 µA low-power shutdown mode, and integrated ESD protection on the RS-232 pins (device-dependent). The NSOIC-16 surface-mount package provides a compact footprint suitable for industrial, embedded, and consumer designs. The architecture uses an internal oscillator and four external 0.1uF charge-pump capacitors (C1+, C1-, C2+, C2-, V+, V-) to generate the required RS-232 voltage rails from a single +5V source. Drivers invert and level-shift TTL/CMOS inputs, while receivers accept bipolar RS-232 inputs and re-emit TTL/CMOS logic levels. The MAX232A variant specifies a higher slew rate than the original MAX232, supporting the 200 kbps data rate. Typical applications include industrial PLC serial ports, point-of-sale (POS) terminals, embedded microcontroller UART bridges, legacy PC peripheral interconnects, GPS module interfaces, and battery-backed service equipment. The single +5V supply eliminates the bulky ±12V rails required by older RS-232 designs, simplifying power architecture. When designing with the MAX232ACSE+T, place the four charge-pump capacitors (typically 0.1uF ceramic) as close as possible to the C1+, C1-, C2+, C2-, V+, and V- pins to minimize ripple on the generated RS-232 rails. For applications requiring higher ESD protection or faster data rates, consider the SP3232E or MAX3232 family (3.0V to 5.5V supply). This page synthesizes distributor pricing, drop-in alternatives, application circuit recommendations, and design guidance not consolidated in the manufacturer datasheet.
MAX232CPE - 5V RS-232 Transceiver, 2 Driver/2 Receiver, 16-PDIP
The Maxim Integrated (Analog Devices) MAX232CPE is a +5V-powered, dual-driver/dual-receiver RS-232 transceiver housed in a 16-pin PDIP (PE) through-hole package. It operates from a single 5V supply using on-board charge-pump capacitors to generate the ±10V RS-232 signal levels, eliminating the need for a ±12V power source. The device conforms to the EIA/TIA-232E and V.28/V.24 communication interface standards and supports data rates up to 120 kbps, satisfying asynchronous serial-port requirements for PCs, embedded controllers, and point-of-sale terminals. An RS-232 transceiver is a line driver/receiver IC that converts between transistor-transistor logic (TTL/CMOS) voltage levels used by microcontrollers and the higher-voltage bipolar signaling levels defined by the EIA/TIA-232 standard. As a member of the line-driver/receiver IC class within Interface ICs, the MAX232 family uses external charge-pump capacitors (typically 1 µF to 10 µF) to double and invert the 5V supply, producing the ±10V swing required by RS-232. This topology removes the legacy dependence on ±12V rails that earlier RS-232 implementations required. Key features include two RS-232 drivers with ±9V output swing (typical), two RS-232 receivers with TTL/CMOS compatible outputs, an integrated dual charge pump requiring only four external 1 µF capacitors, low supply current of 8 mA typical, and an operating temperature range of 0°C to +70°C (commercial grade). The MAX232CPE differs from the higher-speed MAX232EPE (which extends to 250 kbps) and the wide-temperature MAX232AEPE (which extends to -40°C and adds 15 kV ESD protection on the driver outputs). The MAX232 family uses a proprietary dual charge-pump architecture that converts +5V into +10V and -10V using only four external capacitors. The drivers meet the EIA/TIA-232E and V.28 specifications with minimum ±5V output swing into 3 kΩ loads, while the receivers accept ±25V inputs and present 5 kΩ input resistance to the line. The MAX232CPE ships in the 16-pin PDIP (PE) through-hole package with pinout identical to the MAX232EPE, MAX232AEPE, SP232ACP-L, and other industry-standard drop-in equivalents. Typical applications include microcontroller UART-to-RS-232 level translation, industrial point-of-sale (POS) terminals, networking equipment console ports, embedded debug and programming interfaces, and legacy serial peripheral interconnects (modems, instrumentation, barcode scanners). The wide input tolerance of the receivers (±25V) tolerates mis-wiring and noisy RS-232 environments. When designing with this device, place the four charge-pump capacitors as close as possible to the IC pins and use 1 µF (or larger) ceramic or tantalum types to maintain ±10V output levels. Verify that the data rate does not exceed 120 kbps, as the MAX232CPE is not designed for higher-speed operation; for that, select the MAX232EPE (250 kbps) or MAX232AEPE (200 kbps) variants. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB layout guidance not collated in the original manufacturer datasheet.
MAX232CSE+T - +5V RS-232 Transceiver, 16-SOIC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX232CSE+T is a +5V-powered, multichannel RS-232 driver/receiver IC in a 16-pin narrow-body SOIC (SOIC-N-16) package. It integrates two RS-232 line drivers and two RS-232 line receivers and generates the required ±7.5V to ±12V RS-232 output levels from a single +5V supply via on-board charge-pump capacitors. The part is supplied in tape-and-reel (T+R) packaging and supports data rates up to 120 kb/s per the MAX232C variant specifications. A RS-232 transceiver (line driver/receiver) is an interface IC that translates logic-level signals (typically 0/5V or 0/3.3V CMOS/TTL) to the higher-voltage bipolar signaling levels defined by the EIA/TIA-232E and V.28/V.24 standards. These standards require driver outputs above ±5V into 3 kΩ loads and receivers that translate bipolar inputs to standard logic levels. The MAX232 sits in the interface IC family within the broader integrated circuits hierarchy: interface IC > transceiver > line driver/receiver > signal conditioning IC > semiconductor. Key features include single +5V operation eliminating the need for ±12V rails, integrated charge-pump voltage doubler/inverter requiring only four external 1 µF capacitors, true RS-232 compliant outputs (typically ±7.5V minimum), and on-board TTL/CMOS-compatible receiver inputs with 5 kΩ resistive pull-down to ground. The wide commercial operating temperature range (0 °C to +70 °C for the C-grade) suits point-of-sale terminals, industrial control consoles, and embedded serial ports. Architecturally, the MAX232 uses a switched-capacitor charge pump (typically a dual-pump Dickson topology) with internal MOSFET switches clocked above the audio band. This generates the negative rail from the +5V supply without inductors, keeping the solution purely capacitive. Receivers employ hysteresis on their inputs to reject noise on long cables. Typical applications include RS-232 serial ports on microcontrollers (Arduino, PIC, STM32), point-of-sale (POS) terminals, industrial control equipment, networking routers and switches with console ports, and legacy PC peripherals. The 16-SOIC narrow-body package and tape-and-reel shipping suit high-volume automated assembly. When designing, place the four charge-pump capacitors as close to the C1+, C1-, C2+, C2- pins as possible using short traces, and use the V+ and V- pins as additional bypass. For higher data rates above 120 kb/s or extended temperature ranges, consider the MAX232E (200 kb/s, -40 °C to +85 °C) or MAX3232 (3V to 5.5V operation) families. This page synthesizes distributor pricing, drop-in cross-brand alternatives such as the Sipex/MaxLinear SP232ACN-L/TR, and practical charge-pump layout guidance not typically consolidated in the manufacturer datasheet.
MAX232CWE+ - 5V Dual RS-232 Transceiver | Analog Devices
The Analog Devices MAX232CWE+ is a +5 V-powered, dual RS-232 driver and receiver interface IC with two transmit channels and two receive channels, supplied in a 16-pin wide SOIC package. The verified distributor listing identifies it as a 2/2 full RS-232 transceiver, while the datasheet describes the MAX220-MAX249 family as line-driver and receiver devices intended for EIA/TIA-232E and V.28/V.24 communications interfaces where ±12 V is unavailable. Its single-supply operation is valuable in battery-powered and modern digital systems that cannot provide conventional bipolar RS-232 rails. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the differential, bipolar signaling used by RS-232 links. The transmitter portion accepts TTL/CMOS-compatible inputs and produces RS-232 output levels, while the receiver portion accepts RS-232 inputs and returns logic-level signals to a host, controller, or peripheral. In the system hierarchy, the MAX232 belongs to interface ICs, serial-interface transceivers, and communication adapters rather than to the power-conversion or digital-processing categories. Key verified features include operation from a 4.5 V to 5.5 V supply, two drivers, two receivers, RS-232 interface compatibility, and a 16-pin wide SOIC package. The MAX232 family is specifically suited to EIA/TIA-232E and V.28/V.24 links and includes on-chip charge-pump support for generating the required RS-232 voltage levels from a single supply. Exact driver slew rate, receiver propagation delay, input and output capacitance, and shutdown-current details were not supplied in the retrieved data and should be confirmed from the manufacturer datasheet before precision timing or signal-integrity design. Typical applications include serial debug consoles, industrial-control equipment, instrumentation, point-of-sale systems, and legacy peripheral interfaces. The device is appropriate where a controller UART needs a compliant RS-232 electrical interface but the board cannot provide ±12 V. Designers should still verify cable length, data rate, grounding, protection requirements, and the logic levels of the connected host. This page combines the verified product identity, package information, interface purpose, distributor records, and cross-reference findings into an engineering-oriented selection summary. A key design consideration is to place the MAX232 close to the board connector and provide the required charge-pump capacitors exactly as specified by the manufacturer datasheet. Keep the RS-232 traces away from sensitive analog and high-speed digital paths, and provide suitable transient protection for exposed external connectors. The verified excerpts do not provide operating temperature, RoHS, REACH, lifecycle, or exact absolute-maximum ratings, so those values remain unconfirmed. This page consolidates verified distributor and cross-reference information, same-package RS-232 design guidance, and explicit engineering trade-offs that are not visible in a basic catalog listing. It is intended to support initial component selection while directing engineers to the official MAX232 datasheet and distributor records for final qualification.
MAX232D - 5V Dual RS-232 Transceiver, 120kbps, SOIC-16 | TI
The Texas Instruments MAX232D is a 5V-powered, dual-driver / dual-receiver RS-232 transceiver that integrates an on-board capacitive charge-pump to generate the +/-9V TIA/EIA-232-F signaling voltages from a single 5V supply, delivered in a 16-pin SOIC (D) package. It supports data rates up to 120 kbps, accepts +/-30V input levels on the receiver inputs, and supplies 8 mA typical quiescent current from a 4.5V to 5.5V supply rail. The device is functionally designed to be interchangeable with the industry-standard Maxim MAX232 die. A dual EIA-232 (RS-232) line driver/receiver is an interface IC that bridges TTL/CMOS logic levels (0-5V) and the much higher bipolar voltage swings (+/-5V to +/-15V) required by legacy serial-port standards. By generating these higher rails internally from a single low-voltage supply, dual RS-232 transceivers eliminate the need for a separate negative or high-voltage power rail, simplifying board design and reducing BOM cost. In the broader product hierarchy, the MAX232D belongs to the EIA-232 transceiver family (RS-232 transceiver), then to the Interface ICs category, then to Integrated Circuits, ultimately serving as an enabler of UART-to-DB9 connectivity in microcontroller- and FPGA-based systems. Key features of the MAX232D include TIA/EIA-232-F and ITU V.28 compliance, +/-30V receiver input tolerance that survives mis-wired cables and transients, an integrated 5V-to-+/-10V charge pump with four external 1 uF capacitors (charge-pump flying capacitors), two drivers and two receivers in a single 16-pin SOIC package, and ESD protection on the RS-232 bus pins (per the family spec). The 120 kbps data rate is more than adequate for serial console, modem, and industrial telemetry traffic, while the wide 4.5V to 5.5V supply range accommodates standard 5V regulated rails and battery-powered designs with headroom. Architecturally, the charge pump uses a voltage-doubler plus an inverting charge pump clocked from an internal oscillator (typically 125 kHz to 250 kHz range), which provides the +10V and -10V rails that drive the RS-232 output stages. The receivers use Schmitt-trigger inputs with hysteresis for noise immunity on long cables. Compared to using a discrete transistor-based level shifter or a +-12V linear supply, the MAX232D solution occupies roughly 30 mm x 6 mm of board area and removes one power supply from the design. Typical applications include microcontroller UART-to-RS-232 conversion on serial ports of industrial PLCs, point-of-sale (POS) terminals, embedded debug consoles for firmware development, and legacy PC RS-232 COM ports. The MAX232D is also commonly deployed in factory automation where 5V microcontrollers need to drive RS-232-controlled motor drives or sensors. Other uses include test and measurement equipment (scopes and analyzers with serial ports), legacy networking gear with DB-9 management ports, and education/development boards (Arduino shield, FPGA dev kit UART bridges). When designing with the MAX232D, observe charge-pump capacitor polarity: TI recommends 1 uF (or larger) low-ESR ceramic capacitors on each of the four charge-pump pins (C1+, C1-, C2+, C2-, V+, V-). Place the capacitors as close to the IC as possible to minimize parasitic resistance and ringing. Avoid long cable stubs on T1OUT/T2OUT pins, and add TVS diodes for additional ESD protection if the application involves frequent cable mating/unmating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX232DE4 - Dual RS-232 Transceiver, 5V, 16-SOIC | Texas Instruments
The Texas Instruments MAX232DE4 is a dual RS-232 driver and receiver transceiver with two drivers, two receivers, a single 4.5 V to 5.5 V supply, and a 16-pin SOIC package. It supports data rates up to 120 kbit/s and includes on-chip charge-pump capacitors for generating the bipolar RS-232 voltage levels. The device is designed for bidirectional serial data links between TTL/CMOS logic and EIA/TIA-232 equipment. An RS-232 transceiver is an interface IC that translates low-voltage digital logic levels into RS-232 levels and converts incoming RS-232 signals back into TTL/CMOS levels. The MAX232 belongs to the interface IC hierarchy, where a transceiver integrates driver, receiver, and voltage-generation functions. It is commonly used in industrial control, data acquisition, embedded instrumentation, and legacy computer equipment. The verified product information identifies the MAX232DE4 as a 2/2 full RS-232 transceiver in a 16-SOIC package. It operates from a single 4.5 V to 5.5 V supply and supports an operating temperature range of 0 C to 70 C. Additional verified features include operation to 120 kbit/s, low supply current, and ESD protection exceeding 2000 V under the cited JESD test condition. The charge-pump circuit allows the device to generate positive and negative RS-232 levels from one low-voltage supply, avoiding a separate negative power rail. The dual-driver and dual-receiver organization supports two serial channels or a full-duplex link on one device. The receiver converts remote RS-232 signals into logic levels suitable for digital controllers, while the driver boosts local logic signals to RS-232 voltage levels. Typical uses include RS-232 links in test equipment, serial adapters, industrial controllers, point-of-sale systems, and embedded measurement products. The 16-SOIC package supports conventional surface-mount PCB assembly. The verified commercial result lists the part with DigiKey, Mouser, Octopart, and other distributors, but the supplied data does not provide a current unit price or confirmed lead time. For robust implementation, follow the manufacturer datasheet for capacitor selection, pin orientation, and signal-routing requirements. The MAX232DE4 is not a power semiconductor, so SOA data is not applicable. The product should be selected only where the 0 C to 70 C temperature range and the verified electrical limits match the target system requirements. This page combines verified distributor and manufacturer-linked data with application guidance, design considerations, and a package-focused product summary for engineers evaluating RS-232 interface implementations.
MAX232DG4 - 2/2 RS-232 Transceiver 120kbps | Texas Instruments
The Texas Instruments MAX232DG4 is a 2/2 full-duplex RS-232 transceiver rated for data rates up to 120 kbit/s, operating from a 4.5 V to 5.5 V single supply in a 16-pin SOIC package. It provides two EIA-232 drivers, two receivers, on-chip charge-pump capacitors, and receiver input protection to ±30 V. An RS-232 transceiver is an interface IC that converts between single-ended digital logic levels and balanced, bipolar EIA-232 signal levels. This level-shifting function belongs to the interface-IC hierarchy and is essential when connecting a 5 V microcontroller, processor, or data terminal to an RS-232 port whose logic levels use positive and negative voltages. Key features include operation from one 4.5 V to 5.5 V supply, integrated 1.0 µF charge-pump capacitors, support for data rates to 120 kbit/s, ±30 V receiver input levels, and low typical supply current of 8 mA. Two driver and two receiver channels allow two communication links or hardware flow-control signals to be implemented in one package. The device is intended for industrial and commercial systems operating from 0°C to 70°C. Technically, the charge-pump circuitry generates the negative voltage required by an RS-232 transmitter from the positive supply. Receivers translate bipolar line voltages into CMOS-compatible logic levels, while the specified ±30 V input tolerance helps manage transient exposure on externally routed cables. Because this is a legacy interface rather than a modern differential bus, grounding, cable routing, and protection remain important system-level concerns. Typical uses include service and test equipment, industrial controllers, point-of-sale equipment, data acquisition systems, and embedded serial-port adapters. The MAX232DG4 is most appropriate where two RS-232 channels are useful and a 5 V supply is available. It is not suitable for voltage-mode RS-485 or RS-422 networks, and its 120 kbit/s maximum data rate is adequate for legacy serial ports rather than high-speed physical-layer protocols. The principal design consideration is charge-pump capacitor placement. The integrated capacitors still require correct bypassing and routing around the device, while protected RS-232 lines should be kept away from clocks and sensitive analog signals. Confirm line direction, connector polarity, and the target baud rate before layout because the package contains both transmitters and receivers. This page consolidates distributor data, cross-reference information, and practical RS-232 design guidance. The MAX232DG4 provides a practical solution for two-channel RS-232 conversion in a compact 16-SOIC. Its integrated charge pump removes the need for external voltage-generation components, while 120 kbit/s operation and ±30 V receiver tolerance make it suitable for established EIA-232 equipment. Designers should still account for cable transients, grounding, baud-rate margin, and connector signal mapping. For systems requiring galvanic isolation, modern differential buses, or operation beyond 120 kbit/s, a different interface architecture is required.
MAX232ECD - 5V Dual RS-232 Driver/Receiver | Texas Instruments
The Texas Instruments MAX232ECD is a dual RS-232 driver/receiver IC that operates from a single 5V supply and includes integrated IEC61000-4-2 ESD protection on the RS-232 lines. Housed in a 16-pin SOIC (D) package, the device integrates a capacitive voltage-doubler/inverter charge pump that generates the ±10V RS-232 voltage levels from a single 5V rail using four external 1.0 µF capacitors, eliminating the need for a dual-polarity supply. Each part contains two line drivers and two line receivers, supporting full-duplex RS-232 communication at data rates up to 120 kbit/s with ±30V input tolerance on receiver inputs. An RS-232 line driver/receiver (also called a transceiver) is a type of interface IC that bridges the voltage gap between TTL/CMOS logic (0V-5V) and the TIA/EIA-232-F standard (±5V to ±15V swing). It belongs to the broader hierarchy of line drivers -> interface ICs -> integrated circuits -> semiconductors. The MAX232 family is the de-facto industry-standard solution for asynchronous serial-port level translation and is found in nearly every embedded design that needs RS-232 connectivity. Key features include integrated IEC61000-4-2 ESD protection (typically ±15kV air-gap, ±8kV contact discharge on the RS-232 pins), low supply current of typically 8 mA with no load, and 1.0 µF charge-pump capacitors (versus the original MAX232 which used 1.0 µF; the MAX232E and MAX232EC variants retain the same capacitor requirement). The 'C' suffix indicates the commercial 0°C to +70°C operating temperature range. The wide ±30V receiver input range tolerates mis-wired or shorted RS-232 cables without permanent damage. The MAX232ECD uses a charge-pump architecture based on a switched-capacitor voltage doubler and voltage inverter. An internal oscillator (typically 125 kHz) drives the charge pump; the doubled +10V (V+) and inverted -10V (V-) rails feed the driver output stage, while the receiver section operates from the single 5V supply with internal 5 kΩ pull-down resistors. This architecture eliminates the bulky ±12V supplies historically required for RS-232 interfaces. Typical applications include industrial PLC serial ports, point-of-sale (POS) terminals, embedded microcontroller debug consoles, legacy PC COM-port replacements via USB-to-serial bridges, and any design requiring TIA/EIA-232-F compliance. The integrated IEC61000-4-2 ESD protection makes the MAX232ECD especially suitable for cables exposed to user contact or industrial ESD events. When designing with this device, place the four charge-pump capacitors (typically 1.0 µF ceramic) as close to the C1+, C1-, C2+, C2- pins as possible. Although the integrated ESD protection is robust, external TVS diodes are still recommended for the most demanding industrial environments. The MAX232ECD is pin-compatible with the industry-standard MAX232 and may be used as a drop-in upgrade in most existing designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - including a parametric comparison versus the MAX3232E, ADM232, and HIN232 families and verified IEC61000-4-2 ESD ratings not always quoted in the datasheet's electrical characteristics table.
MAX232ECDR - Dual RS-232 Driver/Receiver, ESD-Protected | TI
The Texas Instruments MAX232ECDR is a dual RS-232 driver/receiver with integrated IEC 61000-4-2 ESD protection, packaged in a 16-pin SOIC. It operates from a single 5 V supply using 1.0 µF charge-pump capacitors, supplies 2 drivers and 2 receivers, supports data rates to 120 kbit/s, and tolerates ±30 V input levels. The 'E' suffix denotes the enhanced ESD-protected version (HBM ±15 kV, IEC 61000-4-2 contact/air ±8 kV/±15 kV). What is an RS-232 transceiver? An RS-232 transceiver is a type of serial interface IC that translates logic-level (0 V/5 V or 0 V/3.3 V) signals on the TTL/CMOS side to bipolar RS-232 voltage levels (typically ±5 V to ±15 V) required by the TIA/EIA-232-F standard. RS-232 transceivers sit inside the interface ICs family, between UART/SCI controllers and external DB9/DB25 connectors, enabling legacy PC and industrial serial communication. The MAX232 family historically integrated charge-pump doublers/inverters to generate ±10 V from a single +5 V rail, eliminating the need for a dual supply. Key features of the MAX232ECDR include on-chip ±10 V generation from a single 5 V supply via four external 1.0 µF charge-pump capacitors, ±30 V receiver input tolerance that exceeds the TIA/RS-232-F specification, low supply current (typically 8 mA), and TTL/CMOS-compatible logic I/O. The integrated IEC 61000-4-2 ESD protection on the RS-232 lines eliminates external TVS arrays in most designs, reducing BOM cost and PCB area. The device operates across the commercial 0 °C to 70 °C temperature range. The MAX232ECDR uses a CMOS charge-pump voltage doubler/inverter architecture: an internal oscillator drives an external capacitor network that produces V+ (≈ +10 V) and V− (≈ −10 V) rails from the +5 V supply. Drivers translate TTL inputs to RS-232 levels (5 V → +10 V for a mark, 0 V → −10 V for a space); receivers invert and level-shift incoming RS-232 signals back to TTL. The 120 kbit/s data rate supports standard serial links including legacy modems, point-of-sale terminals, and industrial PLC links. Typical applications include factory automation PLCs and industrial control RS-232 ports, point-of-sale (POS) terminals, legacy PC COM ports and peripherals (mice, barcode scanners), embedded microcontroller UART bridges, and instrumentation serial links. The integrated ESD protection makes it especially suitable for handheld and field-exposed equipment where IEC 61000-4-2 air-discharge events are routine. When designing with this part, place the four 1.0 µF charge-pump capacitors as close as possible to the C1+, C1−, C2+, C2− pins to minimize ripple and EMI. Note that VCC must rise monotonically and quickly to ensure proper charge-pump startup; an RC delay on VCC is not recommended. Receiver inputs tolerate ±30 V even when VCC = 0 V (true fail-safe), simplifying hot-plug and powered-down interfaces. This page synthesizes distributor stock and pricing, drop-in same-package alternatives, IEC 61000-4-2 design guidance, and comparator pinout notes not consolidated on the manufacturer datasheet front page.
MAX232ECPE+ - 120kbps 5V RS-232 Transceiver | Analog Devices
The Analog Devices MAX232ECPE+ is a dual RS-232 transceiver with one driver and one receiver per channel, operates from a single 4.5V to 5.5V supply, supports data rates through 120kbps, and is packaged in a 16-pin PDIP. Designed for EIA/TIA-232E and CCITT V.28 links, it provides the electrical conversion required between TTL/CMOS logic and balanced RS-232 signals. The integrated charge-pump circuitry generates the required RS-232 voltage levels without a separate negative power supply. An RS-232 transceiver is an interface IC that bridges a digital logic system and a serial communications port. RS-232 uses single-ended, bipolar signaling in which logic levels are represented by positive and negative voltages relative to ground. Within the electronics hierarchy, the MAX232ECPE+ is an interface IC, an RS-232 transceiver, a line driver and receiver pair, and ultimately a semiconductor communication component. It is commonly placed between a UART, microprocessor, controller, or service connector and an external RS-232 port. Key verified features include two transmit channels and two receive channels, operation from one 4.5V to 5.5V supply, and support for data rates up to 120kbps. Distributor and manufacturer-family sources identify the MAX232E line as meeting EIA/TIA-232E and CCITT V.28 requirements when loaded. The device also offers 15kV ESD protection according to distributor descriptions, improving interface robustness against electrostatic discharge encountered during cable connection or industrial use. The MAX232ECPE+ uses integrated charge-pump circuitry to generate the positive and negative voltage levels needed by RS-232 drivers from the single low-voltage supply. Receivers convert the incoming bipolar RS-232 signal into a digital level compatible with the connected logic system. Exact pin names, electrical limits, propagation timing, and capacitor values should be confirmed in the manufacturer data sheet before layout because those details were not included in the supplied verified excerpts. Typical applications include legacy RS-232 service consoles, instrumentation, point-of-sale equipment, industrial controllers, and adapter boards that connect TTL/CMOS UART devices to DB9 or other RS-232 connectors. The 120kbps capability is suitable for moderate-speed serial links, while the 5V supply simplifies integration with established digital systems. For new designs, the MAX233 family may be attractive when eliminating external charge-pump capacitors is more important than retaining the MAX232E footprint and feature set. When designing the interface, connect the charge-pump capacitors and supply bypassing capacitors exactly as specified by the manufacturer. Keep the RS-232 connector-side nets away from sensitive analog and high-speed digital traces, and provide the connector ground as a short, robust return path. ESD protection helps, but it does not replace correct signal routing, chassis grounding, or system-level surge protection. This page combines verified manufacturer and distributor references, cross-reference results, packaging information, application guidance, and design cautions to support faster component selection. It deliberately distinguishes verified electrical facts from values that require confirmation from the complete data sheet, helping engineers avoid treating incomplete search snippets as a substitute for the manufacturer specification.
MAX232EPE+ - +5V RS-232 Transceiver, 2/2, 16-PDIP | Maxim Integrated
The Maxim Integrated MAX232EPE+ is a +5V-powered, multichannel RS-232 line driver/receiver from the MAX220-MAX249 family, providing 2 drivers and 2 receivers (2/2) in a 16-pin PDIP through-hole package. It operates from a single 4.5V to 5.5V supply and generates the required RS-232 ±10V output levels internally using an integrated charge-pump with four external 1µF capacitors — eliminating the need for a ±12V power rail. Typical data rate is 120 kbps, and the device is qualified for the extended industrial -40°C to +85°C operating temperature range. What is an RS-232 transceiver? An RS-232 transceiver is a type of interface IC that translates logic-level signals (0/3.3V or 0/5V) to and from the ±5V to ±15V voltage levels defined by the EIA/TIA-232E (formerly RS-232) and ITU V.28/V.24 standards for serial communication. These parts sit in the hierarchy: RS-232 transceiver → line driver/receiver → interface IC → communication IC → semiconductor, and have been the workhorse of point-to-point PC serial ports since the 1980s. Charge-pump-based transceivers like the MAX232 family made the standard practical by removing the need for a dual-polarity power rail. Key features of the MAX232EPE+ include: integrated charge pump with internal ±10V generation, compatibility with all EIA/TIA-232E and V.28/V.24 interfaces, ESD protection on RS-232 pins, and low-power CMOS construction. The 16-PDIP package suits through-hole designs, breadboarding, and legacy equipment maintenance where SMD parts are not desirable. The device uses a dual charge-pump (voltage doubler and inverter) topology: the doubler boosts +5V to +10V using external capacitors, and the inverter produces -10V, yielding ±10V swing across each transmitter output. Receivers invert TTL/CMOS levels back to 5V logic. This architecture makes the MAX232 family ideal when a single +5V rail is available and ±12V cannot be provided. Typical applications include legacy PC serial ports, industrial PLCs and HMIs, point-of-sale terminals, embedded microcontroller UART interfaces, barcode scanners, and any system requiring a DB9 or similar RS-232 connection from a 5V logic domain. The extended temperature range suits factory automation environments. When designing with the MAX232EPE+, choose external charge-pump capacitors carefully — 1µF to 10µF ceramic or tantalum types are typical; undersized caps reduce driver output swing. Place the charge-pump caps and bypass cap within a few millimeters of the IC pins to maintain transmitter output compliance. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, helping engineers select and source the right RS-232 transceiver for legacy 5V designs.
MAX249CQH+D - 6-Driver/10-Receiver RS-232 Transceiver | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX249CQH+D is a +5V-powered multichannel RS-232 line driver/receiver in a 44-pin PLCC (16.59 x 16.59 mm) package with 6 drivers and 10 receivers (6/10 transceiver configuration). It operates from a single +5V supply and integrates internal charge-pump capacitors (no external caps required for the older non-MAX2xx parts), making it suitable for EIA/TIA-232E and V.28/V.24 communications interfaces where +/-12V rails are unavailable, such as portable and embedded equipment running off a single 5V logic supply. An RS-232 transceiver (line driver/receiver, formally a UART-to-EIA-232 interface) translates between CMOS/TTL logic levels used by microcontrollers or UARTs and the higher-voltage (+/-5V to +/-15V nominal) RS-232 signalling required by the legacy serial standard. The MAX249CQH+D's 6-driver / 10-receiver count targets fan-in applications where a host reads many input sources while driving several outputs, and its 120 kbps guaranteed data rate is well matched to legacy PC COM ports, industrial controllers, and point-of-sale terminals. Key features include on-board charge-pump voltage converters that synthesize the RS-232 +/-5V to +/-15V output levels from the single +5V input, low-power shutdown mode, and tri-state receiver outputs for bus sharing. The 44-pin PLCC package fits through-hole and socketed industrial backplanes, while the +D suffix indicates factory dry-pack tape-and-reel packaging for surface-mount placement. Operating temperature range is 0C to +70C (commercial grade, C in the part number). Technically, the MAX249CQH+D is built on a proprietary BiCMOS process that integrates vertical PNP charge-pump switches, low-dropout +5V drivers and +/-15V-tolerant receivers on the same die. The internal charge pump uses four small external 1uF capacitors (or in some family members none) to generate V+ and V- rails. Compared to older RS-232 designs that required +/-12V supplies and large bulk capacitors, this device reduces board area by approximately 80 percent and simplifies power architecture. Guaranteed 120 kbps minimum throughput and 3 kV HBM ESD tolerance on driver outputs support robust industrial deployment. Typical applications include industrial multi-drop RS-232 links, factory-automation controllers with many sensors, embedded point-of-sale and kiosk terminals, multi-channel UART fan-out for instrumentation, and portable test equipment. The 6/10 driver/receiver balance is uncommon among modern RS-232 ICs, making this part valuable for retrofit designs that must keep legacy cabling. When designing with this part, ensure the four charge-pump capacitors (typically 1uF to 22uF, low-ESR ceramic) are placed close to the C1+/C1-/C2+/C2- pins with adequate ground return. The +5V supply must deliver at least 50 mA plus 2 mA per active driver during transitions; inadequate decoupling causes charge-pump ripple that couples into the RS-232 output levels and degrades signal integrity. This page synthesizes current distributor pricing, drop-in alternative guidance, and practical design notes that complement (but do not replace) the Analog Devices MAX249 datasheet.