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MAX222IN - 5V Dual RS-232 Interface | Texas Instruments
The Texas Instruments MAX222IN is a 5 V dual RS-232 line driver and receiver with ±15 kV ESD protection, operating at up to 200 kbit/s in an 18-pin PDIP package. It provides two transmit channels and two receive channels, making it suitable for bidirectional serial interfaces, instrumentation, industrial control, and data acquisition equipment. The device is designed to meet TIA/EIA-232-F and ITU V.28 interface requirements while operating from a single 5 V supply. An RS-232 transceiver is an interface IC that converts logic-level digital signals between a host or controller and a RS-232 communication link. Unlike a differential bus such as RS-485, RS-232 uses single-ended signaling with positive and negative voltage levels. The MAX222IN combines drivers, receivers, and internal level-shift capability in one package, reducing the number of external interface components required in a conventional RS-232 port. The MAX222IN operates from a 5 V VCC supply and supports data rates up to 200 kbit/s. Its two drivers and two receivers support full-duplex point-to-point communication when connected to the corresponding RS-232 lines. The verified product description also identifies ±15 kV human-body-model ESD protection, low shutdown supply current, and operation over a -40 °C to +85 °C temperature range. These characteristics make the device appropriate for both commercial and industrial equipment. The MAX222IN is packaged in an 18-pin PDIP, identified by the N package designation in the part number. The through-hole package is appropriate for systems assembled with conventional plated-through-hole components and for prototypes or industrial controllers where through-hole interchangeability is useful. The verified distributor listing identifies the device as a 2/2 full RS-232 transceiver in an 18-PDIP package. Typical uses include RS-232 ports in test equipment, serial adapters, embedded controllers, industrial instrumentation, and communications equipment. Designers should provide the required charge-pump capacitors, connect the supply and ground correctly, and route the RS-232 connector-side signals away from sensitive low-level circuitry. External protection, grounding, and isolation may be required when the cable is exposed to long, unshielded, or electrically noisy environments. The product information supplied here combines distributor listings, datasheet search results, and the MAX222 family datasheet link. It distinguishes verified specifications from unavailable parameters and does not infer electrical limits that are not present in the supplied data.
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.
MAX232DR - 5V Dual RS-232 Transceiver, 120kbps, SOIC-16 | TI (Tape & Reel)
The Texas Instruments MAX232DR 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 MAX232DR 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 MAX232DR 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 MAX232DR 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 MAX232DR 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 MAX232DR, 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.
MAX232DRG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232DRG4 is a 5 V dual RS-232 transceiver IC with two drivers and two receivers, a maximum signaling rate of 120 kbps, and a 16-pin SOIC package. It generates the bipolar RS-232 voltage levels required by EIA/TIA-232 equipment from a single 5 V supply. A RS-232 transceiver is an interface IC that converts between digital logic levels and the bipolar voltage signaling used by serial-port equipment. The MAX232 belongs to the broader line-driver and line-receiver hierarchy, where the driver translates TTL or CMOS logic into RS-232 levels and the receiver converts transmitted RS-232 levels back into logic-compatible signals. This makes it a practical interface between a modern microcontroller UART and legacy RS-232 equipment. The MAX232 provides two transmit channels and two receive channels, allowing one RS-232 port to support full-duplex communication. Its stated maximum data rate is 120 kbps, while its 4.5 V to 5.5 V single-supply operating range supports conventional 5 V digital systems. According to the Texas Instruments product page, the device supports output voltages of positive and negative 9 V and includes positive and negative 2 kV ESD protection on the RS-232 pins. Internal charge-pump circuitry generates the positive and negative voltages required by RS-232 from the 5 V supply, eliminating the need for a separate positive and negative supply in many designs. The drivers and receivers are designed to interface UART controllers with external data-terminal equipment while maintaining logic-compatible digital-side signaling. Its dual-channel arrangement makes it suitable for point-to-point links, equipment control, configuration interfaces, and service ports. Typical uses include industrial controller serial ports, data acquisition systems, test equipment, maintenance interfaces, and communications links between a microcontroller and an RS-232 peripheral. The 120 kbps rate is appropriate for legacy serial protocols rather than high-speed differential buses such as RS-485. Cable length, capacitance, grounding, and signal integrity should be evaluated when designing longer interconnects. For a new layout, route the RS-232 driver outputs and receiver inputs directly to the connector while maintaining the separation recommended for exposed interfaces. Place charge-pump capacitors and interface bypass capacitors close to the device, follow the manufacturer pin description when assigning connector signals, and confirm supply tolerances, grounding, and ESD requirements before releasing the PCB. This page combines manufacturer product information, explicit distributor specifications, package-aware alternatives, and practical interface-design guidance to support component selection, schematic review, PCB implementation, and sourcing decisions for the MAX232DRG4.
MAX232DW - 120kbps Dual RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232DW is a dual RS-232 driver and receiver with two drivers, two receivers, a 120 kbit/s data rate, and a 16-pin SOIC package. It operates from a single 5 V supply and uses an on-chip capacitive voltage generator to produce the bipolar voltage levels required by TIA/EIA-232-F interfaces. Its approximately ±9 V driver output and ±2 kV ESD protection make it a standard choice for converting between 5 V TTL/CMOS logic and RS-232 signal levels. An RS-232 transceiver is an interface IC that bridges a digital logic system and a serial communications port using the voltage-defined RS-232 standard. The MAX232 belongs to the RS-232 transceiver hierarchy, where a line driver converts TTL/CMOS inputs into bipolar RS-232 outputs and a line receiver converts bipolar inputs into TTL/CMOS levels. This allows equipment with a 5 V UART or microprocessor interface to communicate with legacy RS-232 ports without implementing discrete level-shifting networks. Key features include two transmit channels, two receive channels, operation to 120 kbit/s, a typical 8 mA supply current, receiver input capability of ±30 V, and compatibility with TIA/EIA-232-F and ITU Recommendation V.28. The receiver has a typical transition threshold of 1.3 V and typical hysteresis of 0.5 V. These characteristics provide noise margin and stable interpretation of the bipolar RS-232 signal while retaining the familiar ±9 V driver levels. The device combines four RS-232 signal-conditioning channels with an on-chip charge-pump voltage generator. Charge-pump capacitors connected to the designated voltage-generator pins create the positive and negative supply levels needed by the drivers. This architecture eliminates the negative power supply otherwise required by many discrete RS-232 implementations, while the receiver side provides the electrical translation needed to protect and interface a 5 V logic device. Typical uses include industrial serial consoles, point-of-sale equipment, data-acquisition systems, test and measurement instruments, service interfaces, and legacy peripheral connections. A microcontroller can connect its UART TX and RX signals to the appropriate driver and receiver channels, while the external RS-232 connector receives the bipolar line outputs. The 120 kbit/s capability covers many legacy control and communications protocols without requiring a high-speed RS-485 interface. The principal design consideration is the charge-pump capacitor network and RS-232 connector routing. Capacitors must be connected exactly as required by the manufacturer datasheet, and external line protection should be evaluated for the target cable length and environment. Logic levels and signal polarity must also be checked at each UART channel because the MAX232 provides level conversion, not automatic inversion or protocol handling. This product page consolidates the verified manufacturer specifications, distributor availability, cross-reference information, and engineering guidance for MAX232DW. It also distinguishes a genuine same-package replacement from devices with different charge-pump capacitor requirements or package dimensions, helping engineers avoid substitutions that require PCB or component changes.
MAX232DWG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232DWG4 is a dual-channel RS-232 transceiver with two drivers and two receivers, operating from a single 5 V supply at up to 120 kbps in a 16-pin SOIC package. Its integrated charge-pump circuit generates the positive and negative voltages required by RS-232, while the driver outputs swing to approximately ±9 V. An RS-232 transceiver is an interface IC that converts logic-level signals between a host controller and a RS-232 port. It belongs to the hierarchy of interface ICs, communication transceivers, line-interface ICs, and semiconductor signal-conditioning devices. This bidirectional level translation allows equipment using 0 V to 5 V logic to communicate with legacy computers, industrial controllers, test equipment, and other peripherals that use voltage-based RS-232 signaling. The MAX232DWG4 combines four interface functions in one package: two transmit drivers and two receive channels. It supports data rates through 120 kbps, accepts input levels as high as ±30 V, and provides ±2 kV electrostatic-discharge protection. Typical supply current is 8 mA, making it practical for battery-operated instruments, portable test equipment, and embedded control systems where continuous power consumption must remain low. Its internal charge pump uses four external 1.0 µF capacitors to produce the required positive rail and negative rail. The circuit simplifies implementation because the system does not need a separate ±12 V supply. Communication is half-duplex on each channel because a driver and receiver can share the same signal pair, while direction must be controlled by the host if both sides transmit on the same line. Typical uses include serial service ports, industrial configuration interfaces, point-of-sale equipment, modems, embedded instrumentation, and legacy controller connectivity. The MAX232DWG4 is especially useful when the logic side operates at 5 V and the cable side must comply with RS-232 voltage levels. A protected connector and properly routed ground connection remain important because ESD protection does not eliminate the need for good system-level surge protection. During layout, place the four charge-pump capacitors close to their associated pins and provide the decoupling and ground-plane continuity required by the manufacturer datasheet. Keep the logic-side and cable-side routes separated to minimize noise injection. Confirm line-receiver thresholds, driver slew behavior, and cable length against the intended communication standard before releasing a production design. This page combines the MAX232DWG4 specifications, pin assignments, drop-in comparison choices, and practical interface-design guidance. It also highlights charge-pump layout, ESD considerations, application fit, and the distinction between pin-compatible variants so engineers can evaluate replacements without changing the PCB footprint.
MAX232DWR - Dual RS-232 Transceiver 120kbps | TI
Texas Instruments MAX232DWR is a dual RS-232 line driver and receiver with one 5 V supply, 120 kbit/s operation, ±9 V driver outputs, and ±2 kV ESD protection in a 16-pin SOIC package. The integrated capacitive voltage generator produces the bipolar voltages required by TIA/EIA-232-F and ITU V.28 interfaces, while the two receivers translate bipolar RS-232 signals into TTL/CMOS levels. An RS-232 transceiver is an interface IC that connects low-voltage digital logic to the voltage-tolerant, unbalanced serial signaling defined by EIA/TIA-232. Within the product hierarchy, the MAX232 is a dual driver/receiver, an RS-232 interface transceiver, and ultimately a semiconductor for serial communications and embedded data exchange. This category is especially useful when equipment needs a compact way to bridge a TTL/CMOS UART and an RS-232 port using only a single 5 V rail. Key features include two transmit channels, two receive channels, a maximum data rate of 120 kbit/s, and receiver input capability of ±30 V. Each receiver uses a typical input threshold of 1.3 V with 0.5 V of hysteresis. The MAX232 operates from a single 5 V supply, has a typical supply current of 8 mA, and provides ±9 V RS-232 output levels with ±2 kV ESD protection as stated on the Texas Instruments product page. Technically, the capacitive voltage generator converts the 5 V supply into the positive and negative voltages used by the drivers. The drivers add signal conditioning to create TIA/EIA-232-F output levels, while the receivers convert incoming bipolar signals into logic-compatible levels. This integrated charge-pump approach avoids a separate negative supply rail, but the required charge-pump capacitors and their placement remain important to reliable operation. Typical applications include industrial serial consoles, data acquisition equipment, legacy peripheral adapters, point-of-sale systems, and laboratory instrumentation. The 120 kbit/s rate supports conventional serial links while the ±30 V receiver tolerance helps protect logic-side systems when RS-232 cable noise or ground offsets exceed normal logic levels. The device is especially appropriate where a legacy RS-232 interface must coexist with a modern 5 V UART controller. Designers should follow the manufacturer datasheet for charge-pump capacitor values, receiver input handling, unused-pin configuration, and layout recommendations. Keep the charge-pump loop compact, provide the specified bypass and flyback capacitance, and verify the connected UART voltage levels and grounding before treating the interface as RS-232 compliant. This product page combines verified manufacturer specifications, distributor availability references, same-package replacement analysis, and practical interface-design guidance. It is intended to help engineers confirm electrical compatibility, identify genuine pin-compatible alternatives, and implement a dependable 5 V-to-RS-232 signal path without relying on packaging-only substitutions.
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.
MAX232EID - 120kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232EID is a dual RS-232 line driver and receiver with a single 5 V supply, data rates up to 120 kbit/s, and enhanced electrostatic-discharge protection. It is housed in a 16-pin SOIC package and provides two transmit channels and two receive channels for bidirectional serial interfaces. An RS-232 transceiver is an interface IC that translates logic-level signals between a host or controller and a noisy, long-distance serial link. The MAX232EID uses a capacitive voltage generator to produce the positive and negative voltages required by TIA/EIA-232-F and ITU V.28 interfaces. This places it within the RS-232 transceiver, interface IC, and broader semiconductor hierarchy. Key features include operation from one 5 V supply, support for 1.0 µF charge-pump capacitors, a maximum data rate of 120 kbit/s, and receiver input levels extending to ±30 V. According to the Texas Instruments MAX232E product information, all RS-232 pins provide 15 kV human-body-model protection, 15 kV IEC61000-4-2 air-gap discharge protection, and 8 kV IEC61000-4-2 contact-discharge protection. The MAX232EID combines two drivers and two receivers with the internal charge-pump circuitry required to generate bipolar RS-232 voltage levels from a 5 V supply. Its receivers convert incoming RS-232 signals to 5 V TTL or CMOS levels, while its drivers convert TTL or CMOS logic into TIA/EIA-232-F-compatible output levels. This integration simplifies legacy serial-port and industrial-control designs. Typical applications include RS-232 ports on embedded systems, industrial controllers, test equipment, data-acquisition systems, and legacy computer peripherals. The 120 kbit/s operating rate supports many point-to-point serial links, while the enhanced ESD ratings are useful where a cable or connector can expose the interface to electrostatic discharge. Use the pin-description and typical-application information in the manufacturer datasheet when assigning connector and protection components. Confirm the external charge-pump capacitor values, supply decoupling, logic-level compatibility, and connector-side protection against the operating environment before releasing a PCB layout. This page combines the manufacturer specifications with practical interface guidance, package details, and verified drop-in comparison information. It helps engineers assess the MAX232EID for legacy RS-232 connectivity, identify compatible alternatives, and plan ESD-aware PCB implementation without changing the core transceiver architecture.
MAX232EIN - 5V RS-232 Transceiver | Texas Instruments | DIP-16
The Texas Instruments MAX232EIN is a dual RS-232 driver and dual receiver interface IC with a 4.5 V to 5.5 V single supply, 250 kbps data rate, and IEC 61000-4-2 protection, housed in a 16-pin PDIP package. It provides two transmit channels and two receive channels for converting TTL/CMOS logic levels to RS-232 voltage levels and back again. A transceiver combines the functions of an RS-232 line driver and line receiver in one integrated circuit. In the broader semiconductor hierarchy, the MAX232EIN belongs to the interface IC class, where communication between systems with different voltage levels is handled by level-shifting and signal-conditioning devices. Its integrated charge-pump voltage generator allows the device to produce the positive and negative RS-232 voltages required by the standard from a single 5 V supply. The MAX232EIN is designed for 250 kbps data rates and uses on-chip protection against electrostatic discharge. Its integrated protection is identified in the product description as IEC 61000-4-2 protection, making it useful for industrial equipment, communications equipment, and other systems where an RS-232 connector may be exposed to user-contact transients. The 16-pin PDIP package is suitable for through-hole PCB layouts and hand-assembled prototypes. The device is used when a controller, terminal, printer, instrument, or another embedded system must communicate through an RS-232 port. Each receiver converts an RS-232 input to a logic-compatible signal, while each driver converts a logic input into an RS-232 output. The internal charge-pump circuit supplies the bipolar voltage levels required by the RS-232 interface without a separate negative power supply. For robust board implementation, place the charge-pump capacitors close to their associated pins and route the transmit and receive traces away from sensitive analog or high-speed digital signals. Decoupling capacitors should be located near the supply pins, and the external connector should include the required RS-232 signal-ground reference. The MAX232EIN is most appropriate when a single 5 V supply, a compact dual-channel interface, and a legacy RS-232 connection are required. This page combines the manufacturer device description with package information, drop-in comparison options, application guidance, and design notes for engineers selecting or replacing the MAX232EIN. The listed alternatives are limited to verified same-package choices; no cross-package RS-232 devices are presented as drop-in replacements.
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.
MAX232ID - 120kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232ID is a dual-channel RS-232 line-driver and receiver IC that operates up to 120 kbit/s from a single 4.5 V to 5.5 V supply. The device provides two drivers and two receivers, generates the required bipolar RS-232 voltage levels with external charge-pump capacitors, and is housed in a 16-pin SOIC package. Its drivers support plus or minus 9 V output levels, while the receivers tolerate plus or minus 30 V input levels. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 electrical levels and converts received RS-232 signals back into logic levels. Within the interface hierarchy, it is an RS-232 transceiver, an interface IC, and a semiconductor used to bridge TTL or CMOS equipment with a serial communications bus. The MAX232ID is specifically associated with conventional TIA/EIA-232-F and ITU V.28 signaling rather than low-voltage differential protocols such as RS-485. Key features include two RS-232 drivers, two RS-232 receivers, operation from one 5 V supply, and a maximum data rate of 120 kbit/s. External 1 uF charge-pump capacitors are required to generate the bipolar transmitter supply. The receiver section supports plus or minus 30 V input levels, improving tolerance to transient voltages commonly encountered on longer cable runs. Typical supply current is listed as 8 mA in the verified source data. The MAX232ID implements the electrical conversion required at the boundary between a digital controller or UART and an RS-232 port. Because the drivers actively produce RS-232-level voltages, the circuit does not require a separate external RS-232 line driver. Conversely, the receivers convert incoming bipolar signals into a digital voltage compatible with the host logic supply. The complete device therefore consolidates both directions of a two-channel serial interface into one IC. Typical applications include industrial serial consoles, data acquisition equipment, laboratory instruments, point-of-sale systems, embedded control systems, and legacy computer peripherals. The 120 kbit/s operating limit suits conventional serial ports and short-distance point-to-point links. It is also appropriate for troubleshooting and repair systems that must remain compatible with equipment using full-strength RS-232 rather than low-voltage variants. Designers must follow the charge-pump capacitor recommendations and provide the required bypassing on the 5 V rail. Protection, grounding, cable length, and connector selection remain external system considerations. The MAX232ID does not replace the transceiver with an RS-485 or USB interface, and its electrical compatibility should be verified against the connected equipment before substitution. This page consolidates verified manufacturer and distributor information, same-package alternatives, pricing data, and practical engineering guidance. It distinguishes true SOIC-16 drop-in candidates from functional alternatives and highlights the electrical checks required when replacing an RS-232 transceiver.
MAX232IDG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232IDG4 is a dual RS-232 line-driver and receiver interface IC supporting data rates up to 120 kbit/s from a single 5 V supply. The device provides two transmit channels, two receive channels, approximately ±9 V driver output levels, and ±2 kV ESD protection in a 16-pin SOIC package. Its specified temperature range is -40 °C to 85 °C. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts incoming RS-232 signals back into digital logic. Within the broader hierarchy, the MAX232 is a serial-interface transceiver, placing it under interface ICs and data-conversion components used to connect computer, industrial-control, and embedded systems to older RS-232 equipment. The MAX232IDG4 implements the EIA-232 and V.28 signaling requirements described by the manufacturer. Its dual-channel architecture allows one package to serve two RS-232 ports. A charge-pump circuit generates the positive and negative voltages required by the drivers from one 5 V supply, eliminating the need for a separate bipolar supply. The charge-pump network requires 1.0 µF capacitors. Key electrical features include ±30 V receiver input levels, 120 kbit/s operation, and low supply current with a typical value of 8 mA. The driver output swing reaches approximately ±9 V, while the receiver converts the RS-232 line voltage into CMOS-compatible logic. The integrated ESD protection is specified at ±2 kV, making the interface suitable for equipment where cables can introduce electrostatic discharge. Typical uses include industrial controller serial ports, configuration interfaces on embedded systems, test and measurement equipment, and service connections for legacy computer peripherals. Because RS-232 is a point-to-point, unbalanced standard, the MAX232IDG4 is best placed between a host UART and a protected external connector rather than used as a multi-drop network interface. The main design consideration is charge-pump capacitor and connector layout. Place the 1.0 µF capacitors close to the charge-pump pins, route driver outputs and receiver inputs away from sensitive digital signals, and provide the connector-side protection and chassis-ground strategy required by the target equipment standard. Confirm signal levels and polarity in the system firmware or hardware interface before deployment. This product page combines manufacturer specifications, verified price evidence, strict same-package replacement options, and practical interface-layout guidance to support component selection, PCB reuse, and robust RS-232 implementation.
MAX232IDR - 120 kbps Dual RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232IDR is a 5 V dual-channel RS-232 line transceiver with two drivers and two receivers, a maximum data rate of 120 kbit/s, and a 16-pin SOIC package. Its integrated charge-pump circuitry develops the positive and negative voltages required by the EIA-232 interface while the device operates from a single 4.5 V to 5.5 V supply. An RS-232 transceiver is an interface IC that converts logic-level signals into bipolar RS-232 levels and converts incoming bipolar signals back into logic levels. Within the interface hierarchy, the MAX232 belongs to the RS-232 transceiver family of interface ICs used to connect modern digital equipment with legacy serial ports. It is especially useful where a UART provides TTL or CMOS logic but the peripheral expects true RS-232 signaling. The MAX232IDR provides two transmit channels and two receive channels, making it suitable for implementing one or two complete point-to-point serial links. Its stated 120 kbit/s operating rate covers standard asynchronous serial communication, while the single-supply design simplifies PCB power planning. The manufacturer also identifies approximately ±9 V driver output levels and ±2 kV ESD protection as principal benefits of the MAX232 family. Internally, the charge-pump voltage converter supplies the bipolar levels required by the drivers. Receivers tolerate RS-232 input levels down to ±30 V, allowing connected equipment to present stronger transients without immediately damaging the receive path. The manufacturer lists low supply current of approximately 8 mA typical, and the device is designed for interchangeability with the classic Maxim MAX232. Typical applications include serial adapters, industrial control consoles, instrumentation, and embedded systems that communicate with RS-232 equipment through a UART. One receiver and driver can form a bidirectional data path when the transmit and receive lines are cross-connected; the second pair provides another channel or additional unidirectional interface. It is also useful when a legacy printer, controller, or service port requires RS-232 rather than TTL levels. Designers should place the charge-pump capacitors close to the IC and route the RS-232 traces away from sensitive analog and high-speed digital signals. Decoupling near VCC reduces supply disturbance, while the receiver’s ±30 V input capability should not be confused with ±30 V output capability: the specified driver output is approximately ±9 V. Cable protection and grounding remain necessary for reliable operation with external equipment. This page combines the manufacturer’s electrical specifications, ordering information, package details, cross-reference results, and practical implementation guidance. It also identifies same-footprint alternatives and explains the electrical distinctions that should be checked before replacing the MAX232IDR in an existing design.