Interface ICs
Subcategories
Products (3,400+)
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.
MAX3221ECDBRG4 - 3V-5.5V Single RS-232 Transceiver | TI
The Texas Instruments MAX3221ECDBRG4 is a 3 V to 5.5 V single-channel RS-232 line driver and receiver with ±15 kV IEC 61000-4-2 ESD protection, housed in a 16-SSOP package measuring 5.30 mm wide. The device combines one driver and one receiver in a compact interface suitable for bidirectional serial-port connections. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232-compatible voltage levels and restores incoming RS-232 signals to logic-compatible levels. It belongs to the interface IC hierarchy, where it connects digital logic or microcontrollers to legacy peripheral ports. The MAX3221E family also uses on-chip charge-pump circuitry to generate the bipolar voltage levels required by RS-232 without a separate negative supply. Key features include operation from 3 V to 5.5 V, one driver and one receiver, ±15 kV human-body-model ESD protection, ±8 kV IEC 61000-4-2 contact discharge protection, and ±15 kV air-gap discharge protection. The device uses four external 0.1 µF charge-pump capacitors. Its 16-SSOP surface-mount package supports compact industrial-control, instrumentation, and embedded equipment layouts. The MAX3221E architecture provides the electrical interface required by asynchronous serial systems. A single external capacitor at each charge-pump node supports the internal voltage conversion, while the driver presents the bipolar voltage levels expected by an RS-232 port and the receiver converts those levels back to digital logic. This integration simplifies PCB area compared with discrete level-shifting and charge-pump networks. Typical applications include debug-console connections, industrial serial adapters, point-of-sale equipment, test and measurement instruments, and embedded systems that retain an RS-232 port. For new designs, an RS-232 transceiver is most useful when an existing host or peripheral expects the physical RS-232 interface rather than USB, RS-485, or a proprietary differential link. Place the four 0.1 µF charge-pump capacitors close to their designated pins and route the driver output and receiver input traces away from sensitive analog or high-speed digital nodes. Confirm the board ground and cable shield arrangement before field deployment because connector-level ESD protection alone does not eliminate conducted noise entering through the cable. This product record combines the MAX3221ECDBRG4 electrical characteristics, package information, interface ratings, drop-in alternatives, comparison parameters, and practical layout guidance in one engineering-focused reference. It supports component selection, PCB footprint review, and RS-232 interface design without relying on a generic interface-IC overview.
MAX3221EEAE+ - 250kbps RS-232 Transceiver | Analog Devices
Analog Devices MAX3221EEAE+ is a single-driver, single-receiver RS-232 transceiver designed for portable and embedded equipment. It operates from 3.0V to 5.5V, supports data rates up to 250kbps, and is housed in a 16-pin SSOP package. The MAX3221E family also provides automatic shutdown and wake-up functions plus enhanced electrostatic-discharge protection on all transmitter outputs and receiver inputs. An RS-232 transceiver is an interface IC that converts a logic-level UART signal into RS-232 voltage levels and converts an incoming RS-232 signal back into CMOS-compatible logic. It belongs to the communication-interface hierarchy: RS-232 transceiver, line-driver and receiver interface, interface IC, and semiconductor. This bidirectional conversion allows a modern microcontroller or processor to communicate with legacy printers, industrial equipment, data terminals, and other RS-232 systems. The MAX3221EEAE+ combines a 3.0V to 5.5V supply range with a maximum data rate of 250kbps. Its AutoShutdown feature reduces supply current to 1uA when the system is inactive, helping conserve power in handheld and battery-operated equipment. Enhanced ESD protection rated to 15kV adds protection for the physical RS-232 connector interface, where cables can introduce electrostatic discharge into the equipment. The device uses a charge-pump-assisted interface architecture to generate the positive and negative voltages required by RS-232 while operating from a single low-voltage supply. One transmitter and one receiver support one complete bidirectional communication channel. The MAX3221 is the 16-pin member of the MAX3221E, MAX3223E, and MAX3243E interface family, while MAX3223E and MAX3243E provide additional driver or receiver channels for multi-port designs. Typical uses include handheld test equipment, portable data-collection systems, industrial serial adapters, point-of-sale terminals, and equipment with a legacy RS-232 port. The 16-pin SSOP package is useful when a compact interface is required without adding a larger multi-channel transceiver. The combination of low-voltage operation, 250kbps performance, AutoShutdown, and 15kV ESD protection makes the part appropriate for portable equipment that must maintain reliable serial connectivity. Designers should follow the manufacturer datasheet for capacitor selection, charge-pump layout, and RS-232 connector protection. Place the required charge-pump capacitors close to their associated pins, route the interface nets away from sensitive analog circuitry, and provide the specified bypass capacitance at the supply pins. The external RS-232 connector should also receive suitable protection appropriate to the cable length and environmental exposure. This page combines manufacturer specifications, packaging information, practical interface-design guidance, and technically meaningful drop-in comparisons. These engineering details help shorten component selection and PCB-layout work while making the trade-offs among the MAX3221E grade and package-ordering options easier to assess.
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.
MAX3221IPWR - 250kbps Single RS-232 Transceiver | Texas Instruments (Tape & Reel)
The Texas Instruments MAX3221IPWR 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 MAX3221IPWR, 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.
MAX322CUA+ - Dual SPST 35 Ohm Analog Switch | Analog Devices
Analog Devices MAX322CUA+ is a precision, dual-supply, dual SPST analog CMOS switch with 35 ohm on-resistance, housed in an 8-uMAX package. The device contains two independently controlled switches in a 1:1 configuration and operates from dual supply rails. Its low 1.25 mW power consumption, 100 pA maximum leakage current, and switching times of 150 ns maximum turn-on and 100 ns maximum turn-off make it suitable for precision signal-routing and battery-powered instrumentation. An analog switch is an electronic routing component that connects or isolates signal paths under digital control. A single-pole, single-throw, or SPST, switch provides one conducting path when enabled and a high-impedance path when disabled. The MAX322 family belongs to the analog-switch hierarchy within interface ICs and supports signal selection, test-point isolation, sampling circuits, and compact measurement systems. The MAX322CUA+ provides two independent switch channels, a 1:1 signal configuration, and 35 ohm on-resistance. Its 1.25 mW power consumption is particularly useful in portable equipment where continuous circuit loading affects battery life. Maximum leakage is listed at 100 pA, helping preserve the amplitude and accuracy of signals measured through high-impedance nodes. Maximum turn-on and turn-off times are 150 ns and 100 ns, respectively, while the specified switch charge is 5 pC. The dual-supply architecture allows signals to be routed around a zero-volt reference without adding a level-shifting function. Control inputs determine when each SPST path conducts, making the device appropriate for precision analog signal paths rather than high-voltage or high-current switching. Because the on-resistance is specified at 35 ohm, source impedance, signal amplitude, and downstream capacitance should be considered when calculating insertion error and settling behavior. Typical uses include battery-powered multimeters, low-power sensor acquisition, laboratory test equipment, audio measurement paths, and portable diagnostic instruments. In each case, the device can route a selected input to an amplifier, measurement converter, or control circuit while isolating inactive channels. The small 8-uMAX package also supports compact instruments where PCB area is limited. For layout, place the device close to the switched signal source and destination to minimize PCB capacitance and resistance. Keep sensitive analog traces away from digital control routing, provide a stable ground reference, and use the pin-description table in the manufacturer datasheet when assigning tracks. Do not use the switch as a power switch; its 35 ohm on-resistance is intended for signal routing rather than load-current distribution. This page combines the manufacturer product information, distributor listings, and cross-reference results with practical guidance on switching performance, layout, signal integrity, application fit, and replacement selection. It also identifies where package, pin, electrical, lifecycle, and compliance details must be confirmed in the official MAX322 documentation before a production release.
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.
MAX3232EIPWRQ1 - 250kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX3232EIPWRQ1 is an automotive-qualified, 2/2 RS-232 line-driver and receiver transceiver operating from a 3 V to 5.5 V supply at up to 250 kbit/s in a 16-pin TSSOP package. It provides pin-to-pin ±15 kV IEC ESD protection on the serial-port connection pins and incorporates a dual charge-pump circuit for RS-232 signal-level conversion. An RS-232 transceiver is the interface between a modern low-voltage digital controller and a physical serial port. It belongs to the interface-IC hierarchy, where transceivers combine digital line drivers, line receivers, voltage conversion, and electrostatic-discharge protection. The MAX3232E-Q1 family is designed for industrial and automotive systems requiring TIA/EIA-232-F and ITU V.28-compatible operation. The device includes two line drivers and two line receivers. Its 3 V to 5.5 V VCC operating range supports both 3.3 V and 5 V system rails, while its maximum data rate of 250 kbit/s covers legacy serial-port, industrial-control, and point-to-point communications. The typical standby current is 300 µA, and the dual charge pump supplies the positive and negative voltage levels required to generate compliant RS-232 output levels. The MAX3232EIPWRQ1 also meets or exceeds TIA/EIA-232-F and ITU V.28 requirements. Pin-to-pin ±15 kV IEC ESD protection strengthens the interface against electrostatic discharge on exposed serial connections. Because the IC combines level translation, charge-pump generation, and protection, the design can use fewer external components than a discrete RS-232 implementation. Typical applications include automotive diagnostic and service interfaces, industrial serial controllers, programmable-logic-controller communications, point-to-point RS-232 links, and embedded systems that retain a legacy serial console. The 16-pin TSSOP package supports compact control boards, while the automotive qualification makes the device suitable for electrically harsh vehicle environments when the complete system requirements are satisfied. Design the charge-pump capacitors and VCC bypass capacitor close to their associated pins, and keep the serial traces away from high-current switching paths. Confirm that cable length, baud rate, grounding, and connector selection remain suitable for the chosen RS-232 application. The maximum data rate is 250 kbit/s, so it should not be selected for faster differential links or unrelated high-speed serial protocols. This page consolidates the exact electrical ratings, package information, interface standards, application guidance, and verified drop-in alternatives of the MAX3232EIPWRQ1 into an engineering-focused selection reference.
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.
MAX3232EUE+ - 3.0-5.5V 1Mbps RS-232 Transceiver | Maxim
The Maxim Integrated MAX3232EUE+ is a 3.0 V to 5.5 V, low-power, true RS-232 transceiver with two transmitters, two receivers, and operation up to 1 Mbps in a 16-pin TSSOP package. Its dual charge-pump design generates the bipolar voltage levels required by RS-232 while allowing the device to operate from a single 3.0 V to 5.5 V supply. An RS-232 transceiver is an interface IC that converts between logic-level signals used by digital systems and bipolar voltage signals used by RS-232 links. It belongs to the interface IC category and connects host controllers, test equipment, industrial systems, and peripheral controllers through the EIA RS-232 standard. A dual transceiver supports two communication channels on one device while reducing board area and component count. The MAX3232EUE+ operates from 3.0 V to 5.5 V and supports data rates up to 1 Mbps. Its true RS-232 transmitter output stage uses low-dropout operation, while the internal dual charge pump requires only four external 0.1 uF capacitors. The 16-TSSOP package is suitable for compact surface-mount equipment, although its narrow lead pitch requires careful PCB assembly and soldering. The transceiver architecture separates the transmit and receive paths, allowing one side of the interface to remain active while the other handles incoming data. This makes the device suitable for systems with asynchronous serial links, local control ports, and communication with legacy RS-232 equipment. The single-supply implementation also simplifies power design in systems that do not provide a separate negative voltage rail. Typical applications include industrial controller serial ports, laboratory data acquisition, point-of-sale equipment, security systems, embedded instrument interfaces, and general-purpose RS-232 links. Systems requiring two serial channels can use the two transmitters and two receivers in one package. The 1 Mbps capability accommodates substantially faster links than the commonly used 115.2 kbaud RS-232 rate. When placing the device, position the four 0.1 uF charge-pump capacitors close to their associated pins and preserve the pinout shown in the manufacturer datasheet. Confirm cable-length limitations because higher baud rates reduce the practical distance supported by RS-232. The interface also needs appropriate protection and grounding when connected to exposed or industrial cabling. This page combines electrical specifications, package guidance, application fit, comparison data, and drop-in replacement information to support faster component selection and PCB implementation. It also identifies the key technical distinctions engineers should verify when considering another RS-232 transceiver.
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.
MAX3232IDBG4 - Dual 250kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX3232IDBG4 is a dual-channel RS-232 line driver and receiver operating from 3 V to 5.5 V at a maximum data rate of 250 kbps, supplied in a 16-pin SSOP package. The device combines two line drivers, two line receivers, and a dual charge-pump circuit, while its serial-port pins provide ±15 kV ESD protection. It is designed for bidirectional RS-232 interfaces in industrial, embedded, and data-communication equipment. An RS-232 transceiver is the interface circuit that converts logic-level signals into RS-232 voltage levels and restores incoming RS-232 signals to logic-compatible levels. The MAX3232 belongs to the interface IC and RS-232 transceiver hierarchy, where the charge-pump circuitry supports single-supply operation without a separate negative power rail. The two-driver, two-receiver arrangement provides two complete point-to-point serial channels in one package. Key features include a 3 V to 5.5 V operating range, 250 kbps data-rate capability, two drivers, two receivers, and ±15 kV ESD protection on the serial-port connections. According to the Texas Instruments MAX3232 datasheet, the device meets the requirements of TIA/EIA-232-F. Its industrial temperature option operates from −40°C to +85°C, making the part suitable for equipment operating across extended commercial and industrial temperature ranges. The internal dual charge-pump circuit generates the positive and negative voltage levels required by RS-232 while operating from one low-voltage supply. Charge-pump capacitors are required to implement this function, while the external interface also needs the application-specific charge-pump capacitor arrangement and input/output bypass capacitors described in the manufacturer datasheet. The charge pumps do not eliminate the need for correct bypass-capacitor selection; their switching activity must remain compatible with the signal quality required by the connected equipment. Typical uses include RS-232 adapters, industrial control panels, test equipment, barcode scanners, data loggers, embedded service interfaces, and legacy peripheral connections. A particularly suitable use is a two-channel industrial controller that requires two RS-232 ports while operating from a 3.3 V or 5 V system supply. For long cables or externally accessible connectors, the ±15 kV ESD rating adds protection, although board-level grounding and surge design must still address the complete enclosure and cable environment. Designers should preserve the manufacturer-specified charge-pump and bypass-capacitor values, place them close to their associated pins, and route RS-232 driver outputs and receiver inputs away from sensitive low-level circuitry. Do not substitute a functionally similar transceiver without checking its package pinout, supply range, driver and receiver count, data rate, and ESD implementation. These checks are essential because a shared package name alone does not guarantee electrical or timing compatibility. This product guide combines the manufacturer specification with application-oriented integration guidance, drop-in alternatives, and a parameter comparison that supports faster design reviews. It also emphasizes practical distinctions involving the improved MAX3232E family, package compatibility, operating temperature, channel count, and interface protection so engineers can select a replacement without overlooking board-level constraints.
MAX3232IDRE4 - 3V RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX3232IDRE4 is a 2/2 full-duplex RS-232 line-driver and receiver transceiver with a 3 V to 5.5 V supply range, data rates up to 250 kbit/s, and ±15 kV human-body-model ESD protection, packaged in a 16-pin SOIC. Its integrated charge-pump circuitry supports low-power RS-232 communication from 3 V or 5 V systems without requiring a separate negative supply. An RS-232 transceiver is an interface IC that converts logic-level TTL or CMOS signals into balanced, bipolar RS-232 line levels and converts received line signals back into logic levels. The MAX3232IDRE4 belongs to the RS-232 interface transceiver hierarchy within integrated circuits and provides the physical-layer conversion required between a digital controller and a serial data port. The device includes two line drivers and two line receivers, supporting two RS-232 channels in full-duplex operation. Its 3 V to 5.5 V operating range makes it suitable for systems using either 3.3 V or 5 V logic. The 250 kbit/s maximum data rate supports higher-speed point-to-point links, while ±15 kV HBM ESD protection improves robustness when cables connect the board to external equipment. The MAX3232IDRE4 uses the Maxim RS-232 approach in which on-chip charge pumps generate the positive and negative voltages required by RS-232 transmitters. Four external 0.1 µF capacitors support the charge-pump and transmit functions. This arrangement eliminates the need for a separate negative supply rail while retaining compatibility with established RS-232 interface practice. Typical uses include industrial serial consoles, point-to-point configuration links, embedded equipment interfaces, and peripheral connectivity. The device can also support full-duplex communication when one driver and one receiver are assigned to each direction. A 16-pin SOIC package supports compact surface-mount PCB construction and automated assembly. Designers should place the required 0.1 µF capacitors close to their associated pins and observe the polarity and voltage limits given in the manufacturer datasheet. External protection may still be needed for exposed cables or severe electrostatic environments. The maximum cable length and data rate should be selected together because both influence signal integrity and communication reliability. This product page brings together the principal electrical ratings, package information, drop-in replacement analysis, comparison data, and practical PCB guidance for engineers evaluating the MAX3232IDRE4 in a compact RS-232 interface design.