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MAX3097EESE+ - Triple 32Mbps RS-422/RS-485 Receiver | Analog Devices
The Analog Devices MAX3097EESE+ is a triple RS-422/RS-485 line receiver with fault detection, 32 Mbps operation, and ±15 kV ESD protection, housed in a 16-pin NSOIC package. The device operates from a 3 V to 5.5 V supply range, with the verified product description specifying 3 V/5 V operation. It accepts three differential receiver inputs and provides fault-status outputs for detecting invalid input states. A line receiver is an interface circuit that converts low-amplitude differential signals into a digital logic-level output. RS-422 and RS-485 are balanced serial-interface standards used to transmit data reliably over cables and through electrically noisy environments. The MAX3097EESE+ belongs to the receiver and interface-IC hierarchy, combining differential signaling, fault indication, and transient protection in one device. Key features include three high-speed receivers, support for both RS-422 and RS-485 signaling, ±15 kV ESD protection, and operation up to 32 Mbps. The fault-detection circuitry indicates when a receiver input is not in a valid state, allowing system software or hardware monitoring logic to identify wiring faults, idle conditions, or abnormal bus states. The 16-pin NSOIC package supports conventional surface-mount PCB assembly. The MAX3097E family is intended for industrial data links, factory equipment, communications interfaces, and other systems that use balanced differential signaling. Its three-channel architecture reduces component count when several receiver channels are required on one board. The ±15 kV ESD rating is particularly relevant to externally connected communication lines, where static discharge and cable-borne transients can damage interface circuitry. Designers should verify the receiver’s fault-status logic, supply sequencing, input termination, and cable configuration against the manufacturer datasheet before production use. Differential receiver inputs should be routed as a matched pair, with appropriate grounding and protection implemented according to the system’s cable environment. The receiver is not a transmitter, so a separate RS-485 driver is required when a design needs bidirectional bus communication. This product page consolidates verified manufacturer and distributor information, pricing references, package details, and application guidance for engineers evaluating the MAX3097EESE+. It is intended as a technical buying and design reference rather than a substitute for the complete manufacturer datasheet.
MAX3160EAP+ - 3.0-5.5V Multiprotocol Transceiver | Analog Devices
The Analog Devices MAX3160EAP+ is a 3.0V to 5.5V RS-232/RS-485/RS-422 multiprotocol transceiver with a 20-pin SSOP package. It is programmable as a two-transmitter, two-receiver RS-232 interface or as a single RS-485/RS-422 transceiver, allowing one physical interface circuit to support multiple serial protocols. The device also supports pin-selectable transmitter slew rates for RS-232 and RS-485/422 operation, helping reduce EMI and cable reflections. Analog Devices identifies the MAX3160 family as a low-power multiprotocol interface solution, with a listed 1 uA operating-current feature and data rates up to 250 kbps for suitable operation. The MAX3160EAP+ is packaged as a 20-SSOP surface-mount device. Its protocol configurability makes it useful in industrial controls, interface converters, networking peripherals, point-of-sale equipment, and security systems where a board must accommodate legacy RS-232 alongside balanced RS-485 or RS-422 links. The MAX3160 family is pin-programmable, so the same PCB can be configured differently during assembly or test. Compared with a fixed RS-232 transceiver, the MAX3160EAP+ adds RS-485/RS-422 capability and selectable slew-rate control in one interface IC. Its low operating-current positioning is important for portable and space-constrained equipment, while the SSOP footprint simplifies integration with conventional surface-mount assembly. Design decisions should confirm the selected protocol, termination requirements, cable length, data rate, and logic-level compatibility against the manufacturer datasheet.
MAX31856MUD+ Precision Thermocouple Converter | Analog Devices
The Analog Devices MAX31856MUD+ is a precision thermocouple-to-digital converter with cold-junction compensation, digital linearization, Celsius-formatted output, and a 14-TSSOP package. The verified source data identifies 0.0078125°C resolution and supports readings from -55°C to 125°C for the listed device context, with thermocouple measurements reaching as high as +1800°C. It converts thermocouple signals into digital temperature data while supporting multiple thermocouple types through device configuration. A thermocouple-to-digital converter is an interface IC that conditions a low-voltage thermoelectric voltage, performs cold-junction compensation, applies the appropriate linearization for the selected thermocouple type, and transfers temperature data to a host controller. The MAX31856 belongs to the sensor and detector interface category and sits between physical temperature sensors and digital embedded systems. Its digital interface makes temperature monitoring suitable for industrial equipment, test systems, control loops, and embedded instrumentation. The verified manufacturer result identifies cold-junction compensation, thermocouple signal digitisation, linearization, Celsius output format, and 0.0078125°C resolution as central features. The device is supplied in a 14-pin TSSOP package, with the MUD+ ordering code shown by DigiKey as a thermocouple-to-digital converter IC. The source material does not provide a complete verified set of electrical limits, SPI timing values, thermocouple input ranges for every type, or package dimensions, so those values are not inferred here. Because a thermocouple measures the temperature difference between a sensing junction and a reference junction, cold-junction compensation is essential for accurate measurements near ambient temperature. The MAX31856 handles this function internally, allowing the host system to receive compensated digital temperature data rather than raw thermocouple voltage. Digital linearization further reduces the software burden associated with converting nonlinear thermocouple voltage into temperature. Typical uses include industrial furnace monitoring, temperature-controlled processes, laboratory equipment, environmental monitoring, and embedded thermal control. In each case, the thermocouple type, wiring, cold-junction implementation, grounding strategy, and digital interface configuration must be selected according to the manufacturer's datasheet. The verified data does not identify a specific companion MCU or application reference design, so companion products are not asserted as manufacturer-recommended parts. The principal design consideration is ensuring that the selected thermocouple, input filtering, grounding, and digital interface match the system measurement range. For thermocouple signals, keeping the analog input path away from switching nodes and noisy digital return currents helps preserve measurement integrity. This page consolidates verified distributor listings, the official Analog Devices product page, and the available cross-reference information without inventing missing electrical parameters.
MAX3221CDB - 250kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX3221CDB is a 3 V to 5.5 V, single-channel RS-232 line driver and receiver supporting data rates up to 250 kbps in a 16-pin SSOP package. The transceiver combines one driver, one receiver with a dedicated enable input, and a dual charge-pump circuit, while providing ±15 kV ESD protection on the serial-port connection pins, including ground. An RS-232 transceiver is an interface IC that converts logic-level signals between a host or controller and a RS-232 serial link. The MAX3221 belongs to the line-driver and line-receiver hierarchy within interface ICs and interface transceivers. It is useful where a compact embedded system must communicate with legacy serial equipment, industrial controllers, service consoles, or other RS-232 endpoints without using a higher-voltage ±5 V supply rail. Key electrical features include a 3 V to 5.5 V supply range, operation at up to 250 kbps, one full-duplex driver, one full-duplex receiver, and ±15 kV ESD protection. The integrated dual charge-pump circuit provides the RS-232 level-shifting function needed by the line driver, while the receiver provides inversion and thresholding appropriate for noisy serial environments. A dedicated receiver-enable input supports controlled receiver operation in systems where the serial line must be disabled temporarily. The MAX3221 architecture is intended for low-voltage systems that cannot conveniently support a traditional RS-232 supply. Operating the charge-pump and transceiver from 3 V to 5.5 V reduces system-voltage requirements, while the single-channel structure avoids the channel count and pin requirements of multi-driver RS-232 devices. The 16-pin SSOP package is suitable for compact industrial, communications, instrumentation, and embedded-control equipment. Typical applications include RS-232 configuration ports, programmable-instrument control, industrial serial adapters, point-of-sale equipment, and maintenance interfaces. Its 250 kbps capability is more than adequate for many legacy control protocols, while the receiver enable function is useful in systems that share, isolate, or periodically disconnect a serial port. A key design consideration is that the external RS-232 connector, cable, and ground path determine much of the real-world ESD and noise immunity. Place the transceiver close to the connector, route the interface ground appropriately, and use the datasheet-recommended charge-pump capacitor and driver-load arrangements to preserve signal integrity. This page consolidates the device specifications, pin-compatible family comparisons, application guidance, and design cautions needed to evaluate the MAX3221CDB alongside other single-channel RS-232 transceivers.
MAX3221CPW - 250kbps Single-Channel RS-232 Transceiver | TI
Texas Instruments MAX3221CPW is a single-channel RS-232 line driver/receiver with a 3 V to 5.5 V supply, operation up to 250 kbit/s, and ±15 kV ESD protection on the serial-port connection pins. The device is packaged in a 16-pin TSSOP package and includes one line driver, one line receiver with a dedicated enable pin, and a dual charge-pump circuit. It is designed to provide the electrical interface between an asynchronous communication controller and a serial-port connector while operating from a single supply voltage. An RS-232 transceiver is an interface IC that converts logic-level digital signals into RS-232 voltage levels and converts received RS-232 signals back into logic-level signals. The MAX3221 belongs to the RS-232 interface IC hierarchy, which includes line drivers, line receivers, and charge-pump-assisted transceivers used for serial communications equipment, industrial controls, instrumentation, and point-of-sale terminals. The dual charge-pump circuit generates the positive and negative voltage levels required by the RS-232 interface without requiring a separate negative supply. The MAX3221 operates from 3 V to 5.5 V, accepts 5 V logic input with a 3.3 V supply, and supports data rates to 250 kbit/s. Its low standby current of 1 µA typical and use of external 0.1 µF capacitors help support compact, power-conscious interface designs. The dedicated receiver enable pin allows the receiver to be disabled when the host does not need to monitor the serial link. The device meets TIA/EIA-232-F requirements and is also associated with ITU V.28 operation, providing a standard RS-232 electrical interface for asynchronous communication systems. The ±15 kV ESD protection is specified pin to pin, including the serial-port connection pins and ground. This protection helps improve system robustness when cables are exposed to electrostatic discharge during installation, servicing, or normal handling. Typical uses include single-channel serial console links, industrial serial adapters, programmable instrument interfaces, barcode and point-of-sale equipment, and embedded systems that require one bidirectional RS-232 channel. The 250 kbit/s capability is appropriate for legacy serial peripherals and control links, while the 3 V to 5.5 V operating range supports both 3.3 V and 5 V system rails. When laying out the circuit, place the charge-pump capacitors and the driver and receiver interface capacitors close to their associated pins, and route the RS-232 traces away from sensitive analog or high-speed digital signals. Confirm that the transceiver enable state matches the host controller’s serial-port requirements before relying on low-power standby operation. This page combines the manufacturer’s RS-232 interface specifications with package and application guidance, verified comparison candidates, and practical design notes for engineers evaluating the MAX3221CPW in compact serial-interface designs.
MAX3221CUE+ 3V-5.5V RS-232 Transceiver | Analog Devices
Analog Devices MAX3221CUE+ is a production RS-232 transceiver for single-driver, single-receiver communications links. It operates from +3V to +5.5V and is specified for EIA/TIA-232 and V.28/V.24 interfaces. The device includes one line driver, one receiver with a dedicated enable input, and a dual charge-pump circuit that supplies the RS-232 bipolar signal levels required by the communications interface. The MAX3221 family also uses Maxim’s AutoShutdown feature, allowing the on-board supply and drivers to shut down when no valid receiver signal is present, reducing supply consumption in systems where the interface is intermittently active. The MAX3221CUE+ is packaged in a 16-pin TSSOP and is identified by the C suffix and E-grade temperature designation in the manufacturer’s product family documentation. An RS-232 transceiver is an interface IC that translates between single-ended logic-level signals and the voltage-defined, bipolar signaling used by RS-232 equipment. In the transmit direction, the line driver converts logic-level data into an RS-232 signal; in the receive direction, the receiver converts the incoming RS-232 signal into a logic-level output. The dual charge-pump circuit supports the voltage translation required by the RS-232 standard without requiring a separate negative supply. The receiver enable pin gives the system designer a way to control whether the receiver is active, while AutoShutdown provides an additional power-management mechanism for ports that may be idle. The key verified characteristics of the MAX3221CUE+ include its +3V to +5.5V supply range, 1 µA-class shutdown current as described by the manufacturer family documentation, RS-232 transceiver operation, and its 16-pin TSSOP package. The Newark distributor listing identifies the part as an RS-232 transceiver with 120 Kbps signaling and a 70°C operating-temperature listing. The Analog Devices product page identifies the MAX3221 family as production and lists a starting list price of $2.52. Additional operating, electrical, and environmental details are available in the manufacturer datasheet and should be confirmed against the specific ordering code before design release. Typical uses include legacy serial-port equipment, industrial control links, data-acquisition equipment, and embedded systems that require a compact RS-232 port. The MAX3221CUE+ can be used when a design needs a low-voltage digital supply while retaining conventional RS-232 signaling at the connector. Its single-driver and single-receiver organization is appropriate for point-to-point links rather than multi-drop RS-232 networks. The dedicated receiver enable and AutoShutdown functions are useful in systems where the interface must remain available without continuously powering the complete driver and receiver circuitry. The primary design consideration is verifying the exact pinout, capacitor values, and signal-termination requirements from the MAX3221 manufacturer datasheet. Charge-pump capacitors must be placed close to their associated pins, and the RS-232 connector-side circuit should be designed for the voltage and ESD requirements of the application. The MAX3221CUE+ is appropriate when the required interface is one driver and one receiver in a 16-pin TSSOP footprint; designers needing multiple drivers or receivers should select a larger RS-232 transceiver family instead. This page combines manufacturer family information, distributor pricing, verified cross-reference results, application guidance, and design cautions to support practical sourcing and comparison of the MAX3221CUE+ rather than reproducing only the basic distributor description.
MAX3221EAE+ - 3V RS-232 Transceiver with AutoShutdown | Analog Devices
The Analog Devices MAX3221EAE+ is a 3V-powered, 1-driver/1-receiver RS-232 transceiver with AutoShutdown, operating from 3V to 5.5V and reaching 120 kbps in a 16-pin SSOP package. It provides one transmit driver, one receive path, automatic shutdown and wake-up, and enhanced ESD protection according to the verified manufacturer description. The device is intended for low-voltage serial interfaces where power efficiency, compact footprint, and reliable RS-232 signal translation are required. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the bipolar voltage levels used by RS-232 links. The MAX3221 family uses an internal charge-pump circuit to generate the RS-232 transmitter voltage from a single low-voltage supply. In the system hierarchy, it is a communication interface IC, a line-interface device, and a voltage-level translator used between host controllers and external serial equipment. Key verified characteristics include a 3V to 5.5V supply range, 120 kbps data-rate capability, 1 microamp supply-current operation in shutdown, one RS-232 driver, and one receiver. AutoShutdown reduces power use when the receiver does not detect a valid signal. The 16-SSOP package is specified as approximately 5.30 mm wide in the distributor result, making the device suitable for compact equipment designs. The MAX3221EAE+ is appropriate for embedded serial-console connections, industrial control links, point-of-sale systems, instrumentation, and USB-to-RS-232 adapters. The internal charge pump removes the need for a separate bipolar supply, while the receiver and driver provide the basic signal path between a low-voltage controller and an RS-232 connector. The tradeoff is that RS-232 is a single-ended, point-to-point interface with limited cable distance and no multidrop capability. For layout, place charge-pump capacitors and the receiver/transmitter interface components close to their associated pins, and follow the manufacturer's recommended capacitor values. Keep the RS-232 connector-side traces away from sensitive low-level logic where practical. Confirm line rates, cable length, ground continuity, and the system supply level before finalizing the design. This page combines the verified manufacturer description, distributor package information, application guidance, and comparison-oriented design notes to provide practical RS-232 transceiver information beyond a basic catalog listing.
MAX3221IDB - 250kbps Single RS-232 Transceiver | TI
The Texas Instruments MAX3221IDB is a single-channel RS-232 line driver and receiver with a 3 V to 5.5 V supply range, data rate up to 250 kbps, and ±15 kV ESD protection in a 16-pin SSOP package. The device provides one driver and one receiver with a dedicated receiver-enable function for serial-port interfaces. An RS-232 transceiver is an interface integrated circuit that converts logic-level UART signals into RS-232 voltage levels and converts returning RS-232 signals back into logic-compatible levels. The MAX3221IDB sits between an asynchronous communication controller and a serial connector, combining a line driver, line receiver, and dual charge-pump circuit in one compact package. Its headline operating specifications are a 3 V to 5.5 V supply range, 250 kbps maximum signaling rate, and ±15 kV pin-to-pin ESD protection. The integrated dual charge-pump circuit generates the positive and negative voltage levels required for RS-232 transmission without requiring an external supply. A dedicated receiver-enable pin supports controlled reception when the host does not need the incoming signal continuously. The device meets the electrical requirements stated for TIA/EIA-232-F and is intended for asynchronous serial communication. Because the MAX3221IDB combines only one transmit channel and one receive channel, it is most appropriate where the system needs a compact point-to-point RS-232 interface rather than multiple channels. Its 16-pin SSOP format also supports conventional surface-mount PCB assembly. Typical uses include industrial serial controllers, point-to-point data links, configuration-port interfaces, test equipment, and embedded systems that communicate with RS-232 equipment. The 250 kbps capability is suitable for common serial-port baud rates while the internal charge pumps simplify implementation compared with a discrete level-shifting circuit. When laying out the circuit, place the charge-pump capacitors and interface protection components close to their associated pins, and route the driver and receiver traces away from sensitive analog circuitry. Confirm connector-level signal integrity with the intended cable, baud rate, grounding arrangement, and ESD environment before production release. This page combines the manufacturer specifications, drop-in replacement information, application guidance, and design considerations needed to evaluate the MAX3221IDB for a single-channel RS-232 interface. Use the Request a Quote form on this page for current commercial availability and lead-time information.
MAX3221IPW - 250kbps Single RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX3221IPW is a single-channel RS-232 line driver/receiver with a 3 V to 5.5 V supply, a maximum data rate of 250 kbps, and ±15 kV ESD protection, housed in a 16-pin TSSOP package. It combines one transmit driver, one receive channel with a dedicated enable input, and a dual charge-pump circuit for converting low-voltage logic into RS-232 bipolar levels. An RS-232 transceiver is the interface between a low-voltage digital controller and a serial port using bipolar signal levels. Also called an RS-232 line driver/receiver or interface transceiver, it belongs to the interface IC hierarchy and translates controller-side logic into RS-232 levels while converting an incoming RS-232 signal back to logic. The MAX3221 supports one communications direction, making it suitable for point-to-point serial links, control consoles, industrial equipment, and embedded systems. Key features include operation from a 3 V to 5.5 V supply, support for data rates up to 250 kbps, and ±15 kV ESD protection on the serial-port connection pins, including ground. The device accepts 5 V logic input while operating from a 3.3 V supply. Its dual charge-pump architecture requires only 0.1 µF external capacitors, while low standby current supports power-conscious designs. Technically, the MAX3221 contains one line driver, one line receiver with a dedicated enable pin, and the charge-pump circuitry needed to generate positive and negative RS-232 voltage levels. According to the manufacturer datasheet, the interface meets TIA/EIA-232-F requirements and provides the electrical interface between an asynchronous communication controller and a serial-port connector. This combination allows a modern microcontroller or processor to communicate with legacy RS-232 equipment without implementing discrete level-shifting circuitry. Typical applications include industrial automation and factory equipment, point-to-point serial adapters, test and measurement instruments, security and access-control systems, and embedded diagnostic ports. The dedicated receiver enable provides a way to place the receive path in a controlled state, while the 3.3 V-compatible supply helps simplify interfaces based on modern logic rails. When designing a board around the MAX3221IPW, place the required charge-pump capacitors close to their corresponding pins and route the RS-232 connector interface away from sensitive analog or high-speed digital paths. External protection, grounding, and cable-routing practices remain important because the specified ±15 kV ESD rating applies to the device pins rather than to every possible system-level surge, lift, or cable event. This product record combines verified manufacturer specifications, distributor availability information, same-footprint replacement data, and practical interface-design guidance. It is intended to help engineers identify the correct RS-232 transceiver, verify package and pin compatibility, plan decoupling, and distinguish a genuine drop-in replacement from a merely similar line-driver or receiver.
MAX3222CPN+ - 3V RS-232 Transceiver, 1Mbps, 18-PDIP | Maxim
The Analog Devices (formerly Maxim Integrated) MAX3222CPN+ is a 3.0V to 5.5V powered, true RS-232 transceiver that integrates two line drivers, two line receivers, and a dual charge pump in a single 18-pin PDIP through-hole package. It supports data rates up to 1 Mbps (with the MAX3222/MAX3232 family) and uses only four external 0.1 uF capacitors to generate the ±5.5V RS-232 rails from a single 3V supply. The "+" suffix indicates a lead-free, RoHS-compliant shipping tube. A True RS-232 transceiver is a line driver/receiver IC that translates logic-level UART signals (0/VCC) to RS-232 voltage levels (±5V to ±15V) while also shifting external RS-232 levels back down to logic levels. It is a core sub-category of the serial-communication interface hierarchy: UART -> RS-232 transceiver -> line driver/receiver -> interface IC -> integrated circuit. The internal charge-pump voltage doubler/inverter eliminates the bulky ±12V supplies required by legacy RS-232 designs. Key features include an enhanced ESD protection of ±15 kV HBM on the RS-232 bus pins (driver outputs and receiver inputs), guaranteed 120 kbps data rate, and a low 1 uA supply current in shutdown. The MAX3222 is pin-, package-, and functionally compatible with the industry-standard MAX242, providing a low-power modern replacement for legacy designs. The MAX3222 architecture uses an internal dual charge pump (with external 0.1 uF flying and reservoir capacitors) to generate the +5.5V and -5.5V rails required by the RS-232 standard. It includes five receivers/drivers in companion parts (MAX3237 has 3 Rx / 5 Tx, MAX3241 has 5 Rx / 3 Tx) so designers can match port count to application without changing footprint. Typical applications include industrial point-of-sale terminals, networking equipment serial ports, embedded UART-to-RS-232 bridges, and legacy PC peripherals where a through-hole DIP form factor is preferred for hand-prototyping or repair. The wide 3.0V-5.5V supply range lets the same part work from a 3.3V MCU rail or a 5V logic rail. When designing with this device, place the four 0.1 uF charge-pump capacitors as close to the IC pins as possible to minimize supply ripple and meet RS-232 voltage levels under full load. For battery-powered designs, take advantage of the SHDN pin (active-low) to drop quiescent current to 1 uA between transmissions.
MAX3232CD - 2/2 RS-232 Transceiver, 250 kbit/s | Texas Instruments
The Texas Instruments MAX3232CD is a 3 V to 5.5 V multichannel RS-232 line driver and receiver with two drivers, two receivers, 250 kbit/s operation, and ±15 kV ESD protection, housed in a 16-pin SOIC package. It is designed for bidirectional serial-interface links where logic-level CMOS signals must cross a noisy RS-232 cable through level translation and electrostatic-discharge protection. An RS-232 transceiver is an interface IC that combines transmit drivers, receive buffers, and the voltage-level conversion required between low-voltage digital logic and the bipolar RS-232 signal system. The MAX3232CD belongs to the broader interface-IC hierarchy: RS-232 transceiver, communications interface, interface IC, and semiconductor. Its dual-channel arrangement suits point-to-point links, industrial-control connections, console ports, and embedded equipment where both directions of communication are required. The verified device data identifies a 3 V to 5.5 V supply range, two drivers, two receivers, operation up to 250 kbit/s, typical low supply current of 300 µA, and ±15 kV ESD protection. The interface accepts 5 V logic, while the integrated charge-pump and external-capacitor arrangement supports RS-232 signal generation without a separate external power supply. The 16-pin SOIC package provides a compact surface-mount footprint suitable for PCB-based equipment. Typical applications include RS-232 console connections, industrial serial controllers, point-of-sale equipment, test instruments, and embedded systems communicating with legacy peripherals. The 250 kbit/s capability supports substantially faster signaling than conventional low-speed serial links while retaining the standardized RS-232 voltage interface. The external charge-pump capacitors must be placed according to the manufacturer layout guidance to preserve signal integrity and ensure stable operation. When selecting MAX3232CD, verify the required package, temperature range, supply voltage, channel count, and cable-side signaling expectations. Do not substitute a similar part solely by transceiver count; check pinout, logic compatibility, propagation behavior, and the exact package suffix. The MAX3232CD is listed by distributors as a 16-SOIC, 2/2 full RS-232 transceiver, making the package and channel configuration central to drop-in design decisions. This page consolidates verified distributor pricing, source URLs, package information, interface specifications, and design guidance for engineers evaluating the MAX3232CD. It also distinguishes verified facts from fields that require datasheet confirmation before production release.
MAX3232CDW - 250kbps Dual RS-232 Transceiver | TI
The Texas Instruments MAX3232CDW is a dual RS-232 line driver and receiver transceiver operating from a 3 V to 5.5 V supply, supporting data rates up to 250 kbit/s and providing ±15 kV ESD protection in a 16-pin SOIC package. The device contains two drivers and two receivers for full-duplex RS-232 links and accepts 5 V logic signals. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line voltages and converts received line voltages back into digital logic levels. It belongs to the interface IC hierarchy, where a transceiver connects a UART or other serial controller to a physical RS-232 port. The MAX3232 also provides level translation between CMOS logic and bipolar RS-232 signaling. Key features include two RS-232 drivers, two RS-232 receivers, operation from a 3 V to 5.5 V supply, and a maximum data rate of 250 kbit/s. Its typical supply current is 300 µA, helping minimize power consumption in equipment that maintains an RS-232 port. The specified ±15 kV ESD protection applies to the serial-port terminals, including ground, improving robustness when cables are connected or disconnected. The MAX3232 meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards. It uses external 0.1 µF charge-pump capacitors to generate the positive and negative voltage levels required by RS-232. These capacitors must be placed close to the charge-pump pins because excessive trace resistance and inductance can reduce driver output performance or disrupt startup. Typical applications include industrial serial controllers, point-of-sale terminals, data acquisition equipment, test systems, and legacy peripheral connections. The dual-channel arrangement allows one port to transmit and receive simultaneously, while dual transceivers can support two complete RS-232 ports when additional multiplexers or connectors are used. The 16-pin SOIC package also simplifies assembly in conventional surface-mount industrial and commercial equipment. The primary design consideration is maintaining the exact capacitor values and placement specified by the manufacturer datasheet. Designers should also account for RS-232's unbalanced signaling, use suitable protection around external connectors, and avoid interpreting the ±15 kV ESD rating as immunity to every surge or ESD event. This page combines verified technical specifications, sourcing information, drop-in alternatives, and practical integration guidance.
MAX3232CPE+ - 3.0V to 5.5V Dual RS-232 Transceiver | Maxim Integrated
The Maxim Integrated MAX3232CPE+ is a 3.0V to 5.5V, low-power, full RS-232 transceiver with two drivers and two receivers, data rates up to 1 Mbps, and a 16-pin PDIP package. The MAX3232CPE+ converts TTL/CMOS logic levels to and from true RS-232 levels, making it suitable for serial equipment, industrial control, and legacy PC communication. An RS-232 transceiver is an interface IC that bridges the voltage-domain difference between digital logic and the bipolar, noise-tolerant RS-232 standard. MAX3232 belongs to the RS-232 transceiver hierarchy, which sits above interface ICs and semiconductor devices. Its dual charge-pump design generates the positive and negative voltages required by true RS-232 while operating from a single low-voltage supply. The key verified features include a 3.0V minimum and 5.5V maximum supply range, operation up to 1 Mbps, two drivers and two receivers, true RS-232 operation, and four external 0.1 uF charge-pump capacitors. The MAX3232CPE+ is identified by distributors as a 16-PDIP through-hole device. One distributor result also associates the family with low-power operation, making it suitable for portable and embedded systems where supply current and board area matter. The device uses a dual charge-pump architecture with a proprietary low-dropout transmitter output stage. This architecture provides true RS-232 output levels from a single 3.0V to 5.5V supply. The required charge-pump capacitors should be placed close to their associated pins, and the external capacitor values should follow the manufacturer datasheet rather than general-purpose substitution assumptions. Typical applications include RS-232 adapters, industrial serial controllers, test equipment, POS terminals, embedded debug ports, and communication links to legacy computers or peripherals. The two-driver, two-receiver arrangement supports bidirectional point-to-point serial links when paired with the appropriate line-side protection and connector design. When designing a board, reserve a dedicated 16-pin PDIP footprint, route the charge-pump network close to the IC, and keep RS-232 traces away from sensitive analog or high-speed digital signals. Add appropriate transient protection according to the cable length and exposure to industrial transients; the supplied data does not specify an external protection component, so protection selection remains a board-level design decision. This page combines distributor pricing, verified electrical facts, source links, and engineering-oriented design guidance for engineers evaluating MAX3232CPE+ procurement and implementation.
MAX3232CPWR - 250kbps Dual RS-232 Transceiver | TI
The Texas Instruments MAX3232CPWR is a dual-channel RS-232 line driver and receiver operating from a 3 V to 5.5 V single supply, with data rates up to 250 kbit/s and ±15-kV ESD protection. It is packaged in a 16-pin TSSOP (PW) surface-mount package. The device provides two transmit channels and two receive channels for bidirectional serial-interface conversion between TTL/CMOS logic and RS-232 levels. An RS-232 transceiver is an interface IC that translates low-voltage digital logic signals into differential bipolar voltage levels used by RS-232 equipment. The MAX3232CPWR is designed for asynchronous serial communication and uses external capacitors for its charge-pump voltage conversion, avoiding an external power supply while supporting 3 V, 3.3 V, and 5 V systems. Its dual-channel architecture suits equipment with two serial ports, point-to-point links, industrial controllers, and embedded systems requiring robust line-side protection. Key features include 250 kbit/s operation, two drivers, two receivers, low typical supply current of 300 µA, 5-V logic compatibility, and ±15-kV ESD protection. The MAX3232 family meets or exceeds TIA/EIA-232-F and ITU V.28 requirements, as stated in the manufacturer datasheet. The PW package supports compact PCB layouts, while the device’s low-voltage supply range makes it suitable for modern embedded systems. The dual charge-pump architecture generates the positive and negative voltage levels required by RS-232 drivers. External capacitors are connected to the charge-pump pins, and the supply decoupling network should follow the datasheet layout. The MAX3232CPWR is a practical choice where a system needs two RS-232 channels without a separate negative power rail. Typical uses include industrial control equipment, data acquisition systems, test and measurement instruments, USB-to-RS-232 adapters, point-of-sale terminals, and embedded serial bridges. The device is also appropriate for systems requiring robust protection when the cable may be exposed to electrostatic discharge events. When laying out a MAX3232CPWR circuit, place charge-pump capacitors and supply decoupling capacitors close to their associated pins, keep the RS-232 traces away from sensitive analog or high-speed digital paths, and verify the external capacitor values against the manufacturer datasheet. The ±15-kV ESD rating does not eliminate the need for good connector protection and cable routing. This page combines verified manufacturer specifications, pricing context, cross-reference alternatives, application guidance, and practical PCB recommendations for engineers evaluating the MAX3232CPWR.
MAX3232CUE+ - 2/2 RS-232 Transceiver, 3.0-5.5V | Maxim Integrated
The Maxim Integrated MAX3232CUE+ is a 2-driver, 2-receiver true RS-232 transceiver operating from a 3.0 V to 5.5 V supply at data rates up to 1 Mbps, packaged in a 16-pin TSSOP. It uses a dual charge-pump design with a low-dropout transmitter output stage to generate compliant RS-232 levels from a single low-voltage supply. A true RS-232 transceiver is an interface IC that converts logic-level signals between TTL or CMOS equipment and the voltage-defined RS-232 serial bus. In the signal path hierarchy, it belongs to the RS-232 interface family, which sits between computer serial ports, embedded controllers, industrial equipment, and communications cables. The MAX3232CUE+ supports both transmit and receive paths, making it suitable for bidirectional point-to-point serial links. The principal operating specifications are a 3.0 V to 5.5 V supply range, a maximum data rate of 1 Mbps, and a 16-TSSOP package. The transmitter design includes a low-dropout output stage, while the dual charge-pump circuit supports true RS-232 operation from a single supply. Only four external 0.1 µF charge-pump capacitors are required, simplifying implementation on compact boards. The MAX3232CUE+ is a 2/2 transceiver, meaning it provides two transmit channels and two receive channels. It is intended for low-power, low-voltage systems where traditional RS-232 transceivers would require a higher supply. Its electrical interface is suited to controller UARTs, test equipment, point-of-sale terminals, industrial control panels, and other equipment using serial command or data links. The E temperature designation indicates a 0 °C to 70 °C commercial operating range. The TSSOP package supports surface-mount assembly and is appropriate for compact embedded and industrial-control products. Compared with discrete TTL-to-RS-232 designs, the integrated transceiver also reduces board area and simplifies charge-pump implementation. Design the charge-pump capacitors close to the IC, route transceiver outputs away from sensitive analog signals, and use the manufacturer's pin-description table when assigning PCB tracks. Confirm the exact cable length, ground reference, baud rate, and electrical limits for the target RS-232 port before releasing the production design. This page combines the manufacturer specifications with package, sourcing, application, and replacement guidance. It highlights the MAX3232CUE+ operating envelope, explains its charge-pump implementation, and provides drop-in candidates that require careful electrical and pinout verification before substitution.
MAX3232ECD - 250kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX3232ECD is a dual-channel RS-232 line driver and receiver operating from 3 V to 5.5 V, supporting data rates up to 250 kbps and providing ±15-kV IEC ESD protection on the RS-232 bus pins. The device is packaged in a 16-pin SOIC for compact, surface-mount serial-interface designs. An RS-232 transceiver is the physical-layer interface between a host controller or data-processing equipment and an RS-232 port. It combines a line driver, which converts logic-level signals into RS-232 voltage levels, with a receiver, which converts incoming RS-232 signals back into logic-compatible levels. In the power-management hierarchy of communication systems, the MAX3232ECD provides bidirectional RS-232 signal conditioning between a UART controller and an external connector. Key operating features include two communication channels, a 3 V to 5.5 V supply range, and a maximum data rate of 250 kbps. The ±15-kV IEC ESD protection improves robustness when cables and connectors are exposed to electrostatic discharge. These characteristics make the device suitable for industrial control equipment, data acquisition systems, service interfaces, and legacy peripheral connections where a modern USB interface is not practical. The MAX3232 family uses charge-pump circuitry to generate the positive and negative voltage levels required by RS-232 from a single low-voltage supply. This allows the transceiver to operate from 3 V to 5.5 V instead of requiring the traditional ±12 V RS-232 supply. The manufacturer identifies the MAX3232 as a dual-channel 250-kbps line driver and receiver, while its comparison materials identify the MAX3232E as an improved direct drop-in replacement for the MAX3232. Typical applications include UART-to-RS-232 conversion in industrial controllers, programming and configuration ports in test equipment, service interfaces for embedded systems, and point-to-point links between computers or controllers and RS-232 equipment. Using one transceiver supports two RS-232 channels, allowing transmit and receive signals to share the same physical interface without requiring separate driver and receiver packages. The primary design consideration is ensuring that external cable transients remain within the device's operating and protection limits. Keep RS-232 traces away from sensitive clocks and data lines, provide a low-impedance ground return, and use the device pin descriptions in the manufacturer datasheet when assigning PCB functions. Power-supply bypassing and charge-pump capacitor placement should follow the datasheet's recommended layout to maintain stable operation and minimize coupling into adjacent circuitry. This product page combines the MAX3232ECD's electrical characteristics, package information, verified manufacturer resources, drop-in alternatives, comparison guidance, and practical interface-design notes. It is intended to help engineers confirm electrical compatibility, identify the correct 16-SOIC replacement, and plan PCB implementation before releasing a new RS-232 design.
MAX3232ECDB - RS-232 Transceiver 3-5.5V ±15kV ESD | TI
The Texas Instruments MAX3232ECDB is a 2-driver, 2-receiver RS-232 line transceiver operating from a single 3V to 5.5V supply, with ±15 kV IEC ESD protection on the RS-232 bus pins, packaged in a 16-pin SSOP (DB, 5.30 mm width) for commercial 0C to +70C operation. An RS-232 transceiver is a line driver/receiver IC that converts logic-level UART signals (TTL/CMOS, 0V to VCC) into the higher-voltage RS-232 signaling levels (nominally ±5V or more) required by serial ports, modems, and industrial equipment. Within the interface IC family hierarchy, it sits alongside CAN, RS-485, and USB transceivers as a physical-layer signal-conditioning device in the broader category of communication interface components. Key features include guaranteed 250 kbps minimum data rate, a charge-pump architecture that generates the required RS-232 voltage levels using only four small 0.1 uF external capacitors, and ESD protection exceeding ±15 kV (IEC 61000-4-2 air-gap and contact discharge) plus ±15 kV human-body model on the bus terminals. The device meets or exceeds TIA/EIA-232-F requirements and operates from a single supply across the full 3.0V to 5.5V range, eliminating the need for dual ±12V rails. Technically, the MAX3232E family uses proprietary on-chip charge pumps with automatic internal voltage doubling and inversion to produce V+ and V- from the single VCC rail. Two transmitters and two receivers enable a full-duplex UART link with hardware flow control (RTS/CTS). Low receiver-enable current and a shutdown-capable architecture suit battery-powered designs. Typical applications include embedded MCU UART-to-RS-232 ports, industrial programmable logic controller (PLC) console interfaces, point-of-sale equipment, and networking equipment management ports. The E-version ESD rating makes it especially appropriate for ports exposed to human contact. Design consideration: place the four charge-pump capacitors close to pins 1-6 and use 0.1 uF ceramic parts rated at 16V or more; larger values (up to 1 uF) are acceptable but slow the pump startup slightly. This page synthesizes distributor pricing, pin-to-pin drop-in alternatives across TI and MaxLinear/Exar, and practical design notes not found in the manufacturer datasheet.
MAX3232EID - 250kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX3232EID is a dual-channel RS-232 line driver and receiver transceiver rated for 250 kbps, operating from a 3 V to 5.5 V supply and providing ±15 kV ESD protection. It is packaged in a 16-pin SOIC package. The device is intended for portable and industrial equipment that converts logic-level UART signals into RS-232 levels and converts received RS-232 signals back to logic levels. An RS-232 transceiver is an interface IC within the broader class of interface semiconductors. It combines a line driver, line receiver, and charge-pump voltage converter in one package. The MAX3232EID provides two driver and two receiver channels, allowing two simultaneous RS-232 links or one bidirectional port when the driver and receiver channels are paired. Its single 3 V to 5.5 V supply simplifies integration with modern 3.3 V and 5 V digital systems. The principal features include two RS-232 drivers, two RS-232 receivers, a maximum signaling rate of 250 kbps, and ESD protection to ±15 kV on the serial-port connection pins. According to the Texas Instruments MAX3232 product page, the MAX3232 family is recommended for new designs. The MAX3232E is an improved direct drop-in replacement for the original MAX3232, while the MAX3232EID suffix identifies the specified device ordering configuration. Internally, the charge-pump circuit develops the positive and negative voltage levels required by the RS-232 signaling standard. Transmit drivers convert CMOS/TTL-compatible input signals to RS-232 levels, while receive channels detect bipolar RS-232 inputs and produce CMOS/TTL-compatible outputs. The architecture makes this device appropriate for equipment with a host UART, an embedded controller, or an industrial data-acquisition system that must communicate with a legacy serial port. Typical uses include barcode scanners, instrumentation, industrial control links, point-of-sale equipment, and service-console connections. The 250 kbps maximum data rate supports conventional serial communication while the ±15 kV ESD rating helps protect exposed connector inputs. In battery-powered or space-constrained equipment, its single-supply operation can simplify voltage planning and reduce the number of external rails. When laying out the circuit, place charge-pump capacitors and the charge-pump flyback capacitor close to their associated device pins, and route RS-232 connector traces away from sensitive analog and high-speed digital paths. Confirm that the selected transceiver supports the baud rate, cable length, logic levels, and connector protection required by the target RS-232 environment. The IC-level ESD rating does not replace correct signal routing and appropriate external protection. This page combines the device specifications, sourcing workflow, family-level alternatives, and application guidance into a practical engineering resource. It also distinguishes verified device characteristics from package-ordering details and highlights the checks needed when evaluating a pin-compatible replacement for an existing MAX3232EID design.
MAX3232ESE+ - Dual RS-232 Transceiver | Maxim Integrated
The Analog Devices MAX3232ESE+ is a dual RS-232 transceiver with two transmitters and two receivers, a 3.0 V to 5.5 V supply range, and operation up to 1 Mbps in a 16-pin SOIC package. It is designed for bidirectional serial-interface conversion between modern CMOS/TTL logic and RS-232 voltage levels. An RS-232 transceiver is an interface IC that converts low-voltage digital signaling into differential, bipolar RS-232-compatible levels and converts received RS-232 signals back into logic-compatible levels. The MAX3232 belongs to the broader transceiver and interface-IC hierarchy, bridging host controllers, industrial equipment, data-acquisition systems, and service ports. Key verified attributes include two driver channels, two receiver channels, full RS-232 operation, a 3.0 V to 5.5 V supply range, and data rates up to 1 Mbps. The low-power design is suitable for systems where an RS-232 connection must be retained without using a full-sized legacy driver. The 16-pin SOIC footprint supports conventional surface-mount assembly. The device is intended for applications requiring RS-232 electrical compatibility rather than differential RS-485 signaling. Its integrated transmitter and receiver sections make it useful for console connections, configuration ports, embedded control links, and equipment communication. The exact charge-pump capacitor values, receiver thresholds, propagation delays, and electrical limits are not provided in the verified web data and must be checked in the manufacturer datasheet before production design. Typical uses include low-voltage MCU serial consoles, industrial configuration interfaces, test equipment, and legacy peripheral connections. Because RS-232 is point-to-point and single-ended, cable routing, grounding, and protection practices remain important. Use ESD protection and appropriate cable-level transient protection when the connector is exposed to user or industrial environments. Designers should verify the exact MAX3232ESE+ pinout, supply decoupling requirements, capacitor selection, and logic-level compatibility from the manufacturer datasheet. This page combines distributor listings, cross-reference information, and engineering guidance; it does not substitute for the complete manufacturer datasheet for production release.
MAX3232ESE+T - 3.0-5.5V RS-232 Transceiver, 1Mbps, 16-SOIC | Maxim
The Maxim Integrated MAX3232ESE+T (now under Analog Devices / Maxim Integrated) is a 3.0 V to 5.5 V, true RS-232 transceiver with two drivers and two receivers, supporting data rates up to 1 Mbps in a 16-pin SOIC (NSOIC, 0.150 inch) package. It operates from a single 3.0 V to 5.5 V supply and integrates a high-efficiency charge pump with four external 0.1 µF capacitors to generate ±5.5 V RS-232 levels from the input rail. The device is offered on tape-and-reel (the +T is the reel indicator). An RS-232 transceiver is a line driver/receiver IC that translates logic-level (TTL/CMOS) signals from a microcontroller or UART to the +/-5 V to +/-15 V signaling required by the EIA/TIA-232 standard, and vice versa. RS-232 transceivers sit between the data terminal equipment (DTE) and data communication equipment (DCE) and form part of the physical layer of the UART/serial interface family, alongside RS-422 and RS-485 transceivers for longer-distance differential links. Key features of the MAX3232ESE+T include 1 Mbps guaranteed data rate (250 KB/s in the older 160 ns slew-rate version), low supply current of 1 mA typical, an enhanced ESD protection of +/-15 kV HBM on the RS-232 bus pins, and true RS-232 output swing with automatic power-down shutdown. It also provides a low-dropout transmitter output stage so true RS-232 levels are maintained even when VCC drops to 3.0 V. The architecture uses a regulated dual charge pump and four small 0.1 µF ceramic capacitors, eliminating the bulky +/-12 V rails and 1 µF / 10 µF pump capacitors required by classic MAX232 designs. This shrinks the BOM and PCB area and enables portable 3.3 V-only systems to drive full-spec RS-232 links without auxiliary supplies. The part is pin-compatible with the industry-standard MAX232 family. Typical applications include battery-powered serial ports on portable equipment, embedded UART-to-RS-232 bridges on 3.3 V microcontroller boards (e.g. PIC32 and STM32 designs), industrial control and point-of-sale terminals, GPS receiver interfaces, and legacy PC COM-port replacements. Designers of lithium-ion-powered products appreciate the 1 mA supply current. When designing with this part, place the four 0.1 µF charge-pump capacitors (C1-C4) as close as possible to the package and keep the RS-232 trace lengths short. Decouple VCC with 0.1 µF in parallel with 1 µF, and add a series ferrite or TVS if the link will see ESD events beyond the +/-15 kV HBM rating. Note that MAX3232ESE (slew-rate-limited, 160 ns version) is the 250 KBps part; the MAX3232E and 'E' suffix are typically the 1 Mbps variants - verify the exact suffix on the order code before committing to a 1 Mbps design. This page synthesizes distributor pricing, drop-in cross-brand alternatives (TI TRSF3232, Exar SP3232, TI TRS2023), application context not found in the datasheet alone, and an engineering-grade pinout to support sourcing, design-in, and drop-in substitution decisions.
MAX3232ESE+TG035 - 2x2 RS-232 Transceiver, 3-5.5V | Maxim
The Analog Devices Inc./Maxim Integrated MAX3232ESE+TG035 is a low-power, true RS-232 transceiver with 2 drivers and 2 receivers, operating from a 3.0V to 5.5V supply at data rates up to 1Mbps, housed in a 16-pin SOIC (N) package using only four external 0.1uF capacitors. An RS-232 transceiver is an interface IC that converts TTL/CMOS logic levels (typically 0-5V or 0-3.3V) into the RS-232 voltage convention (nominally +/-5V to +/-15V) and back, allowing microcontrollers to communicate with legacy serial ports, modems, and industrial equipment. Within the signal-chain hierarchy it belongs to interface ICs -> drivers/receivers/transceivers -> line transceivers, sitting between the UART logic pin of a processor and the physical DB-9 serial connector. Key features include the wide 3.0V to 5.5V single-supply range that supports both 3.3V and 5V systems, guaranteed 250kbps operation with 3V/1uF load and up to 1Mbps minimum data rate under standard conditions, and the proprietary charge-pump architecture requiring only four 0.1uF external capacitors instead of the large 5uF capacitors of older generation devices. Technically, the device integrates dual charge pumps with cascaded voltage doublers and inverters to generate +5.5V and -5.5V rails internally from the logic supply. The E-suffix grade is specified for -40C to +85C operation. The drivers meet or exceed EIA/TIA-232 and V.28 requirements, and the receivers feature a 0.5V input threshold with 5V-tolerant operation and schmitt-trigger hysteresis for noise immunity. Typical applications include industrial fieldbus adapters, point-of-sale terminals, battery-powered instrumentation with DB-9 debug ports, and legacy PC serial maintenance interfaces. The TG035 suffix identifies the tape-and-reel packaging variant for automated pick-and-place assembly. Design consideration: use 0.1uF charge-pump capacitors rated at 16V or higher and place them close to the IC pins; larger capacitors (1uF) are only needed when running near the 1Mbps rate at 3.3V. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX3232ID - 2/2 RS-232 Transceiver, 5.5V, SOIC-16 | TI
The Texas Instruments MAX3232ID is a 2/2 RS-232 line driver and receiver operating from a 3 V to 5.5 V supply in a 16-pin SOIC package. It supports data rates up to 250 kbit/s, accepts 5 V logic, and provides ±15 kV ESD protection on the RS-232 terminals. The device uses a dual charge-pump architecture and four external 0.1 µF capacitors to generate the bipolar voltage required for RS-232 signaling. An RS-232 transceiver is an interface IC that converts between low-voltage CMOS logic levels and the positive and negative voltage levels used by RS-232 ports. Within the broader semiconductor hierarchy, it is a line transceiver, then an interface IC, and finally a power-management and connectivity component. It is intended for asynchronous point-to-point serial communication, particularly where legacy computers, industrial equipment, test systems, or peripherals use DB-style RS-232 connectors. The principal features of the MAX3232ID are its dual-driver, dual-receiver configuration, 3 V to 5.5 V operation, 250 kbit/s maximum data rate, and ±15 kV terminal-to-terminal ESD protection. According to the manufacturer datasheet, it meets or exceeds TIA/EIA-232-F and ITU V.28 requirements. Its typical supply current is 300 µA, making it suitable for low-power serial interfaces where the host operates intermittently. The MAX3232ID uses a charge-pump voltage converter with external capacitors to develop the negative voltage required by an RS-232 driver. The logic-side pins remain compatible with 5 V CMOS systems, while the driver outputs deliver RS-232-compatible levels. The four required 0.1 µF capacitors should be placed close to their associated supply and ground pins to minimize switching noise and maintain stable charge-pump operation. Typical applications include industrial serial-port adapters, laboratory instrumentation, POS terminals, configuration ports, legacy peripheral upgrades, and embedded systems that retain an RS-232 physical interface. It is particularly appropriate where a 3.3 V or 5 V controller must communicate with an RS-232 device without adding a separate external negative-voltage supply. The primary design consideration is capacitance selection and PCB placement. Use the specified 0.1 µF capacitors, keep charge-pump loops compact, connect the device ground to the interface reference ground, and route the RS-232 traces away from sensitive analog or high-speed digital signals. External protection may still be needed for long or exposed cables even though the integrated terminals provide ±15 kV ESD protection. This product data combines verified manufacturer and distributor information with application guidance, package details, pricing context, and drop-in replacement analysis. It focuses on engineering decisions that are not apparent from a distributor title alone: data-rate capability, supply range, ESD coverage, charge-pump implementation, replacement compatibility, and layout constraints.
MAX3232IPW - 250kbps Dual RS-232 Transceiver | Texas Instruments
Texas Instruments MAX3232IPW is a dual-channel RS-232 line driver and receiver operating from 3V to 5.5V, supporting data rates up to 250kbit/s and providing ±15kV ESD protection. The device is packaged in a 16-pin TSSOP package. It combines two RS-232 drivers, two RS-232 receivers, and onboard charge-pump circuitry that produces the bipolar voltage levels required by the RS-232 interface. An RS-232 transceiver is an interface IC that bridges a low-voltage digital logic system and a serial communications link using single-ended, bipolar signaling. The MAX3232 belongs to the RS-232 interface transceiver hierarchy, where line drivers convert logic signals into RS-232 levels and receivers convert transmitted levels back into CMOS-compatible logic. Its onboard charge pumps allow operation from a single 3V to 5.5V supply rather than requiring a separate ±12V supply. The MAX3232 provides two transmit channels and two receive channels, making it appropriate for implementing a compact RS-232 port. Its maximum 250kbit/s data rate supports conventional serial-port communication while exceeding the throughput needed by many control, instrumentation, and industrial interfaces. The integrated protection is specified to ±15kV on the serial-port connection terminals, including ground, improving robustness when cables are exposed to electrostatic discharge. Internally, the charge-pump circuits generate the positive and negative voltages required by the drivers, while the receiver section provides RS-232 thresholding and noise-tolerant logic-level output. According to the manufacturer datasheet, the device meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28. It also accepts 5V logic, allowing the interface to operate alongside conventional 5V digital systems. Typical applications include industrial control links, test and measurement equipment, POS terminals, security systems, and embedded serial-port designs. The dual-channel arrangement can support one full-duplex RS-232 connection or two unidirectional links, depending on how the driver and receiver pins are assigned. The 16-pin TSSOP package also supports compact surface-mount PCB layouts. When laying out the circuit, place the required external charge-pump capacitors close to their designated pins and route the RS-232 connector-side traces away from sensitive logic. Confirm that the selected external capacitors meet the device's voltage and tolerance requirements. Also verify the electrical requirements of the connected equipment before substituting a similarly packaged transceiver. This page consolidates the verified manufacturer and distributor information with practical interface-layout guidance, pin-compatible alternatives, and a parameter comparison. It is intended to accelerate component selection while keeping all unverified electrical details explicitly identified rather than inferred.
MAX3238EAI+ - 3-5.5V RS-232 Transceiver with AutoShutdown Plus | ADI
The Analog Devices (formerly Maxim Integrated) MAX3238EAI+ is a true RS-232 transceiver operating from a single +3.0V to +5.5V supply in a 28-pin SSOP package. Per the Analog Devices datasheet, the device integrates 5 drivers and 3 receivers, supports data rates up to 250 kbps, and features the proprietary AutoShutdown Plus mode that drops supply current to 1 uA when the connected RS-232 cable is not in use. The internal dual charge-pump with four small 0.1 uF external capacitors generates the +/-5.5V RS-232 signal levels directly from a 3.3V or 5V logic supply, eliminating the need for a separate +-12V rail. An RS-232 transceiver is a line driver/receiver IC that translates logic-level UART signals (0V/3.3V or 0V/5V) into the +-5V to +-15V swing defined by the EIA/TIA-232 standard, providing the voltage translation and noise immunity required to communicate with PCs, modems, and legacy industrial equipment over cables up to 15 meters. The MAX3238EAI+ belongs to the multi-channel RS-232 transceiver category (part of the larger UART-to-RS232 interface transceiver hierarchy) within the wired communication IC market. Key features include 1 uA AutoShutdown Plus supply current, 250 kbps guaranteed data rate, integrated charge-pump requiring only four 0.1 uF capacitors, and compatibility with EIA/TIA-232 and V.28/V.24 standards. The IC also provides INVALID logic output to signal when receivers are out of range, plus FORCEON and FORCEOFF pins for manual shutdown control. The MAX3238EAI+ is the non-ESD version; the MAX3238E variant adds +/-15 kV IEC 61000-4-2 air-gap ESD protection on transceiver pins. The architecture pairs a switched-capacitor DC-DC converter (charge pump) that doubles and inverts the supply, with five RS-232 drivers and three RS-232 receivers. Compared with the older MAX232 family, the MAX3238EAI+ adds the AutoShutdown Plus feature, reducing quiescent current from typical 1 mA to 1 uA when no valid RS-232 signal is present - critical for battery-powered portable equipment. Typical applications include notebook and sub-notebook computers, PDAs, hand-held terminals, battery-powered point-of-sale equipment, and any portable system that needs an EIA/TIA-232 serial port running directly from a 3.3V or 5V battery. When designing with this part, place the four charge-pump capacitors as close to the IC as possible, use 0.1 uF ceramic with X7R or better dielectric, and tie unused driver inputs to GND through 100 kohm resistors to prevent supply-current oscillation. This page synthesizes distributor pricing, validated drop-in alternatives (MAX3238E family variants and TI MAX3238E), and practical design notes that complement the manufacturer datasheet.