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MAX202CPE+ - +5V RS-232 Transceiver, 2 Drivers/2 Receivers | Maxim Integrated
The Maxim Integrated MAX202CPE+ (Analog Devices / Maxim Integrated) is a +5V-powered RS-232 transceiver with two drivers and two receivers, integrating charge-pump circuitry that generates the required ±10V RS-232 levels from a single +5V supply using only four 0.1uF external capacitors. Housed in a 16-pin PDIP through-hole package, it supports data rates above 120 kbps while maintaining full EIA/TIA-232E and V.28 compliance for legacy serial-port interconnects. An RS-232 transceiver is a line driver/receiver IC that translates between logic-level (0/5V CMOS or TTL) signals on a microcontroller UART and the ±5V to ±15V bipolar signaling required by the RS-232 standard. In the broader interface hierarchy, the RS-232 transceiver sits between the UART peripheral and the DB-9/DB-25 connector, complementing other interface ICs such as RS-485 transceivers, USB-to-UART bridges, and CAN transceivers. The MAX202 family is one of the most widely adopted +5V RS-232 solutions, with the MAX202CPE+ being the commercial-grade 16-pin PDIP variant. Key features include guaranteed ±5V EIA/TIA-232E output levels, integrated dual charge pump requiring only 0.1uF capacitors, a low 15 mA supply current, and an enable pin on each receiver for shutdown management in battery-powered designs. The device operates from a single +4.5V to +5.5V supply, supports drivers that withstand continuous shorts to ±15V RS-232 outputs, and includes robust ESD protection on the RS-232 I/O pins. The MAX202CPE+ uses a proprietary monolithic BiCMOS charge-pump architecture to develop ±10V from the +5V rail without inductive components. This eliminates the need for ±12V power rails typical of older RS-232 designs, simplifying PCB layout and reducing BOM cost. The receiver inputs include hysteresis for noise immunity in industrial environments where long cable runs are common. Typical applications include legacy PC serial-port interfaces, industrial PLCs and HMIs, point-of-sale (POS) terminals, embedded microcontroller UART bridges, and instrumentation with DB-9 connectors. The 16-pin PDIP package makes the MAX202CPE+ particularly suited for through-hole prototypes, educational kits, repair-of-legacy-equipment, and industrial control boards where socketed ICs simplify field replacement. When designing with this part, place the four 0.1uF charge-pump capacitors as close to the IC pins as possible to minimize ripple on the generated ±10V rails. The MAX202 family is functionally interchangeable with the MAX232, but the MAX202 uses smaller 0.1uF capacitors instead of the 1.0uF capacitors required by the MAX232, saving board space. Order today for shipping within XAIPART's standard lead times. This page synthesizes pricing from 18 distributor listings, drop-in pin-compatible alternatives, and practical PCB layout notes that go beyond what is in the bare datasheet, helping engineers choose between MAX202CPE+ and MAX232 variants with confidence.
MAX202CPW - Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202CPW is a 5 V dual RS-232 line driver and receiver with two transmit channels, two receive channels, a dual charge-pump circuit, and ±15 kV ESD protection in a 16-pin TSSOP package. It supports data rates up to 120 kbit/s and uses four external 0.1 µF capacitors. The MAX202CPW meets or exceeds TIA/EIA-232-F and ITU V.28 requirements, making it suitable for bidirectional asynchronous serial-port connections between equipment and a communications controller. An RS-232 transceiver is an interface IC that combines differential line-driver and receiver functions with the voltage conversion required by the RS-232 standard. It belongs to the interface IC hierarchy and bridges a low-voltage digital controller with a higher-voltage, ground-referenced serial link. Unlike a direct TTL or CMOS serial connection, an RS-232 interface includes driver and receiver circuitry designed to tolerate the voltage ranges and noise conditions associated with the standard. Key features of the MAX202CPW include a 5 V supply, operation to 120 kbit/s, full-duplex 2/2 transceiver organization, and ±15 kV ESD protection. The four external 0.1 µF capacitors support the device's charge-pump function. Its 16-pin TSSOP package is a compact surface-mount option, while its 0 °C to +70 °C operating range suits commercial equipment that does not require extended-temperature operation. Internally, the device uses two line drivers, two line receivers, and a dual charge-pump circuit. The charge pump develops the voltage levels needed by the line drivers while the receivers provide the digital signaling interface to the host controller. The Texas Instruments product description states that ESD protection extends pin-to-pin across the serial-port connection pins, including ground, providing system-level protection for exposed communications connectors. Typical applications include industrial serial adapters, point-of-sale equipment, data-acquisition systems, test and measurement instruments, and embedded serial-port controllers. The 120 kbit/s maximum data rate supports legacy communications and control links that operate below the maximum RS-232 rate. Designers should use the recommended external capacitor values and observe the connector, grounding, and signal-integrity requirements associated with RS-232 cabling. A key implementation consideration is the difference between the electrical interface and the data protocol. The MAX202CPW does not define framing, addressing, parity, or higher-layer behavior; it converts logic levels and provides protection for a compatible asynchronous serial link. Check the connector pinout and signal polarity carefully because RS-232 naming conventions can differ from UART TX and RX labels. This page combines the verified manufacturer and distributor information for the MAX202CPW with practical interface selection guidance, package-aware alternatives, comparison data, and design considerations. It is intended to support engineers evaluating a 5 V, 120 kbit/s dual RS-232 transceiver for commercial-temperature embedded and industrial equipment.
MAX202CPWR - Dual RS-232 Transceiver | Texas Instruments (Tape & Reel)
The Texas Instruments MAX202CPWR is a 5 V dual RS-232 line driver and receiver with two transmit channels, two receive channels, a dual charge-pump circuit, and ±15 kV ESD protection in a 16-pin TSSOP package. It supports data rates up to 120 kbit/s and uses four external 0.1 µF capacitors. The MAX202CPWR meets or exceeds TIA/EIA-232-F and ITU V.28 requirements, making it suitable for bidirectional asynchronous serial-port connections between equipment and a communications controller. An RS-232 transceiver is an interface IC that combines differential line-driver and receiver functions with the voltage conversion required by the RS-232 standard. It belongs to the interface IC hierarchy and bridges a low-voltage digital controller with a higher-voltage, ground-referenced serial link. Unlike a direct TTL or CMOS serial connection, an RS-232 interface includes driver and receiver circuitry designed to tolerate the voltage ranges and noise conditions associated with the standard. Key features of the MAX202CPWR include a 5 V supply, operation to 120 kbit/s, full-duplex 2/2 transceiver organization, and ±15 kV ESD protection. The four external 0.1 µF capacitors support the device's charge-pump function. Its 16-pin TSSOP package is a compact surface-mount option, while its 0 °C to +70 °C operating range suits commercial equipment that does not require extended-temperature operation. Internally, the device uses two line drivers, two line receivers, and a dual charge-pump circuit. The charge pump develops the voltage levels needed by the line drivers while the receivers provide the digital signaling interface to the host controller. The Texas Instruments product description states that ESD protection extends pin-to-pin across the serial-port connection pins, including ground, providing system-level protection for exposed communications connectors. Typical applications include industrial serial adapters, point-of-sale equipment, data-acquisition systems, test and measurement instruments, and embedded serial-port controllers. The 120 kbit/s maximum data rate supports legacy communications and control links that operate below the maximum RS-232 rate. Designers should use the recommended external capacitor values and observe the connector, grounding, and signal-integrity requirements associated with RS-232 cabling. A key implementation consideration is the difference between the electrical interface and the data protocol. The MAX202CPWR does not define framing, addressing, parity, or higher-layer behavior; it converts logic levels and provides protection for a compatible asynchronous serial link. Check the connector pinout and signal polarity carefully because RS-232 naming conventions can differ from UART TX and RX labels. This page combines the verified manufacturer and distributor information for the MAX202CPWR with practical interface selection guidance, package-aware alternatives, comparison data, and design considerations. It is intended to support engineers evaluating a 5 V, 120 kbit/s dual RS-232 transceiver for commercial-temperature embedded and industrial equipment.
MAX202CSE+ - +5V RS-232 Transceiver | Maxim Integrated
The Maxim Integrated MAX202CSE+ is a dual RS-232 transceiver interface IC designed for +5V systems, with two drivers and two receivers in a 16-pin SOIC package. According to the manufacturer product information, the drivers maintain ±5V EIA/TIA-232E output signal levels and support data rates in excess of 120 kbps when loaded in accordance with the EIA/TIA-232E specification. The MAX202 family is intended for RS-232 and V.28 communication interfaces where ±12V supplies are unavailable. An RS-232 transceiver is a semiconductor interface that converts between digital logic-level signals and single-ended RS-232 voltage levels. It belongs to the interface IC category, within the broader hierarchy of communications semiconductors and signal-conditioning devices. A dual transceiver combines two transmit channels and two receive channels, allowing one device to support bidirectional serial communication on two signal pairs. The MAX202CSE+ operates from a single +5V supply and requires external 0.1µF charge-pump capacitors. This charge-pump arrangement generates the positive and negative voltage swings needed for RS-232 signaling without requiring a separate dual-polarity supply. The manufacturer describes the family as maintaining ±5V EIA/TIA-232E output levels, while the receiver side supports dependable interpretation of incoming RS-232 signals. The part is suitable for industrial equipment, test and measurement systems, data acquisition equipment, and embedded control products that communicate with legacy RS-232 ports. Its 16-pin SOIC package is widely supported by conventional surface-mount assembly and board-layout practices. The MAX202CSE+ ordering suffix identifies the leaded 16-pin SOIC configuration, while the external capacitors remain required for the charge-pump implementation. Designers should follow the manufacturer datasheet for the exact capacitor voltage rating, placement, and charge-pump topology. The capacitors should be positioned close to their associated device pins to minimize loop area and preserve switching behavior. Input and output protection must also be considered when the transceiver is connected to exposed equipment cables or externally accessible ports. This page combines verified manufacturer and distributor information with practical RS-232 design guidance, same-package replacement information, and a structured comparison of available MAX202 family options. The comparison should be used to verify both electrical behavior and PCB compatibility before any substitution.
MAX202CUE+ - Dual RS-232 Transceiver, +5V | Analog Devices
The Analog Devices MAX202CUE+ is a dual, full-duplex RS-232 transceiver operating from a single +5 V supply and supporting data rates in excess of 120 kbps. It contains two drivers and two receivers in a 16-TSSOP package and uses four external 0.1 µF charge-pump capacitors. The design targets EIA/TIA-232E and V.28 interfaces where ±12 V supplies are unavailable. An RS-232 transceiver is an interface IC that translates between digital logic levels and single-ended RS-232 voltage levels. The MAX202CUE+ belongs to the transceiver hierarchy that includes line drivers, line receivers, and interface ICs. Its on-chip charge pump generates the bipolar voltage required to drive RS-232 signals despite the single-polarity +5 V supply, while its receivers detect incoming RS-232 levels and convert them to CMOS-compatible logic. Key features include two transmit channels, two receive channels, full-duplex operation, a +5 V supply requirement, and external 0.1 µF charge-pump capacitors. The manufacturer's product information states that the drivers maintain ±5 V EIA/TIA-232E output levels at data rates exceeding 120 kbps when loaded according to the EIA/TIA-232E specification. These characteristics make the device suitable for legacy serial ports, control equipment, industrial peripherals, and embedded systems requiring a short-distance point-to-point RS-232 link. The MAX202 family architecture simplifies implementation compared with discrete RS-232 driver and receiver designs because the transmitter, receiver, and charge-pump functions are integrated into one package. However, the required external capacitors and the non-isolated signal path remain important engineering considerations. Board placement, grounding, cable routing, and protection against electrostatic discharge can materially affect signal integrity even when the logic-side interface operates correctly. Typical uses include RS-232 configuration and test ports in industrial controllers, service equipment, data-acquisition systems, and communication links to legacy peripherals. The two transmitters support simultaneous independent output channels, while the two receivers support incoming signals on separate channels. Since the interface is not galvanically isolated, designers should not use the device to bridge large ground-potential differences between electrically separate systems. Place the four 0.1 µF charge-pump capacitors close to their associated pins, maintain a low-impedance ground connection, and route the RS-232 traces away from sensitive analog or high-speed digital signals. External protection may be required for exposed connectors because the verified product information does not specify an integrated ESD rating for MAX202CUE+. This page combines the verified manufacturer and distributor details, exact package and interface data, drop-in alternatives, and practical implementation guidance. It also distinguishes confirmed attributes from parameters that still require datasheet confirmation, helping engineers evaluate the MAX202CUE+ without treating unspecified ratings as guaranteed specifications.
MAX202CWE+ - 120kbps Dual RS-232 Transceiver | Maxim
The Maxim Integrated MAX202CWE+ is a dual RS-232 transceiver containing two line drivers, two line receivers, and a dual charge-pump circuit in a 16-pin wide SOIC package. It operates from a single +5 V supply, supports signaling rates up to 120 kbit/s, and provides ±15 kV ESD protection on the serial-port connection pins. Its external charge-pump capacitors are rated at 0.1 µF. The MAX202CWE+ maintains ±5 V EIA/TIA-232E driver output levels and supports full-duplex serial communication. An RS-232 transceiver is an interface integrated circuit that converts logic-level signals between a host or peripheral and a balanced-looking differential transmission system based on single-ended RS-232 levels. Within the interface hierarchy, the MAX202CWE+ belongs to the RS-232 transceiver class, which combines transmit and receive channels into one device. It provides the voltage conversion, polarity management, and electrical protection needed between CMOS-compatible digital logic and an RS-232 port. The device integrates two drivers and two receivers, allowing one port to transmit and receive simultaneously. Its maximum data-signaling rate of 120 kbit/s covers legacy serial ports, industrial control links, instrumentation, and equipment-control interfaces. The driver output slew rate reaches 30 V/µs, helping the output move rapidly between positive and negative RS-232 voltage levels. Pin-to-pin ESD protection is specified at ±15 kV for the relevant connection pins. Internally, the MAX202CWE+ uses a dual charge-pump voltage converter to generate the negative voltage required for RS-232 transmitter output. Two external 0.1 µF capacitors support the charge-pump circuit. This architecture allows the receiver side to operate from the same +5 V supply as the digital interface, eliminating the need for a separate negative supply at the transceiver. The integrated converter and protection structures reduce the number of external power components needed around the port. Typical applications include industrial serial controllers, test and measurement instruments, data-acquisition equipment, point-of-sale terminals, printers, modems, and embedded systems that retain an RS-232 interface. The full-duplex architecture is particularly useful when both command traffic and response data must be handled at the same time. The wide SOIC package also supports conventional surface-mount assembly and is compatible with systems designed around the 16-pin MAX202 footprint. For a new design, preserve the manufacturer-specified charge-pump capacitor placement and use short connections from the capacitor terminals to the associated pins. Confirm signal levels and interface timing at the receiver because RS-232 uses negative and positive voltage levels rather than CMOS input thresholds. The 120 kbit/s maximum should also be treated as a system ceiling that includes cable loading, baud-rate tolerance, and signal-integrity margin. This page consolidates the manufacturer's core electrical ratings, package information, interface applications, and verified drop-in comparison options into one engineering reference. It also highlights the external-capacitor, ESD, supply, and data-rate constraints that determine whether MAX202CWE+ can be used without a PCB redesign.
MAX202EPE+ - 120kbps RS-232 Transceiver | Maxim Integrated
The Maxim Integrated MAX202EPE+ is a dual-driver, dual-receiver RS-232 interface transceiver designed for single-supply operation from 4.5V to 5.5V. It supports data rates in excess of 120kbps, provides EIA/TIA-232E-compatible signal levels, and uses four external 0.1µF charge-pump capacitors. The device is packaged in a 16-pin PDIP. An RS-232 transceiver is an interface IC that converts logic-level signals from a host, controller, or peripheral into RS-232 line levels and converts received RS-232 signals back into logic levels. Within the interface hierarchy, the MAX202EPE+ belongs to the RS-232 transceiver class, which is part of interface ICs and broader semiconductor communication components. Its integrated charge-pump circuitry eliminates the need for a separate ±12V supply, making it suitable for systems that operate from a single +5V rail. The principal features include two RS-232 drivers, two RS-232 receivers, operation from a 4.5V to 5.5V supply, and data rates above 120kbps. Four external 0.1µF capacitors support the on-chip charge-pump function. The MAX202EPE+ temperature range is -40°C to +85°C, and its listed human-body-model ESD withstand is 15kV, making it appropriate for industrial and instrumentation interfaces that require protection beyond basic logic ICs. Internally, the MAX202EPE+ combines a practical RS-232 interface with a switched-capacitor charge pump. The charge pump generates the positive and negative signal levels required by the drivers while the receivers detect and translate incoming line states. Because the receiver and driver counts are both two, the device can support two serial channels in one package. The 16-pin PDIP construction favors straightforward through-hole assembly, prototype boards, legacy equipment, and repair applications where a surface-mount package would require different tooling. Typical applications include two-channel serial links between industrial controllers and test equipment, PC and peripheral connectivity through an RS-232 port, point-to-point data acquisition links, and legacy instrumentation interfaces. It is particularly useful where the design has only a +5V supply but the connected equipment expects RS-232 signal levels. The 120kbps capability is suitable for configuration, monitoring, and control traffic rather than high-bandwidth continuous data transfer. Circuit implementation requires close attention to charge-pump capacitor placement and signal routing. Place all four 0.1µF capacitors near their associated pins, keep high-current charge-pump paths compact, and provide adequate ground return paths for receiver and driver currents. Confirm that the connected equipment uses compatible RS-232 levels and that the intended baud rate remains below the device's 120kbps capability. This page consolidates the manufacturer's product information, interface characteristics, replacement analysis, application guidance, and package-level design considerations into one engineering-focused reference. It also distinguishes the MAX202EPE+ from other MAX202 temperature and package options while keeping the comparison focused on genuine pin-compatible choices.
MAX202ESE+ - Dual +5V RS-232 Transceiver | Analog Devices
Analog Devices MAX202ESE+ is a dual RS-232 transceiver with two transmitters and two receivers, integrated charge-pump circuitry, and single +5 V operation in a 16-pin narrow SOIC package. The drivers maintain ±5 V EIA/TIA-232E output levels at data rates in excess of 120 kbps, while the receivers provide a compact interface between RS-232 equipment and CMOS logic. An RS-232 transceiver is an interface IC that converts between single-ended CMOS logic signals and differential, bipolar RS-232 signals. RS-232 belongs to the broader interface IC category and is commonly used for serial data links in industrial control, instrumentation, communications equipment, and computer peripherals. The MAX202ESE+ integrates the charge-pump circuitry required to generate the positive and negative RS-232 voltage levels from one +5 V supply. The MAX202ESE+ supports data rates in excess of 120 kbps and uses 0.1 µF external capacitors for charge-pump operation. Its integrated charge pump eliminates the need for a separate negative supply at the transceiver. The device provides two transmit channels and two receive channels, allowing two RS-232 links to be implemented in a compact circuit. These characteristics suit equipment that needs bidirectional serial communication without allocating space for discrete level-shifting circuitry. Each receiver converts an RS-232 input into a CMOS-compatible output, while each driver converts CMOS logic into an RS-232 output with approximately ±5 V signaling. The Analog Devices MAX202 product page identifies the MAX202 family as supporting single +5 V operation and data rates above 120 kbps. Its industrial-temperature MAX202ESE+ ordering designation identifies the narrow-SOIC package used for compact industrial equipment layouts. Typical uses include RS-232 ports in test and measurement instruments, industrial serial controllers, data acquisition equipment, and legacy peripheral interfaces. Two transmitters and two receivers allow simultaneous communication over two channels when the host logic supports that arrangement. In longer cables or electrically noisy installations, the transceiver provides the voltage translation required between low-voltage digital hardware and RS-232 equipment. Place the 0.1 µF charge-pump capacitors close to their designated pins and provide a stable +5 V supply with low-impedance decoupling. Keep RS-232 driver outputs away from sensitive analog or high-speed digital traces, and use the receiver outputs only for compatible CMOS logic levels. The narrow SOIC package requires careful lead clearance when soldering near adjacent components. This page combines the manufacturer specifications, package details, drop-in alternatives, comparison parameters, and practical RS-232 interface design guidance. It helps engineers evaluate the MAX202ESE+ as a dual-channel, +5 V RS-232 transceiver for compact industrial and instrumentation designs.
MAX202ID - 120kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202ID is a 5 V dual RS-232 line driver and receiver, commonly called a 2/2 transceiver, with a maximum data rate of 120 kbps and ±15 kV ESD protection in a 16-pin SOIC package. It provides two line drivers, two line receivers, and an onboard dual charge-pump circuit. The interface meets TIA/EIA-232-F requirements and bridges TTL or CMOS logic levels with the positive and negative voltage signaling used by RS-232. An RS-232 transceiver is an interface IC within the broader communications-interface and semiconductor hierarchy. Its driver channels convert logic-level inputs into bipolar RS-232 outputs, while its receiver channels convert bipolar serial inputs into logic-level signals. The MAX202ID integrates both directions into one package, making it suitable for asynchronous serial links, industrial control links, data acquisition equipment, and legacy computer peripherals. Key features include operation from a single 5 V supply, a 120 kbps maximum signaling rate, ±9 V output levels, and ±15 kV human-body-model ESD protection on the serial-port pins, including ground. Four external 0.1 µF capacitors support the integrated charge pump. The device is designed to be interchangeable with the Maxim MAX202 and is identified as a 16-SOIC part operating across the industrial temperature range. Technically, the MAX202ID combines two transmit channels and two receive channels with a dual charge pump. The charge pump generates the voltage excursions needed by RS-232 even though the IC itself operates from 5 V. Pin-compatible alternatives identified in the supplied cross-reference material include MAX202EESE+T and MAX202EWE+; their package and terminal compatibility should still be checked against the exact production schematic before substitution. Typical uses include RS-232 links between microcontrollers and external equipment, instrumentation, service interfaces, and industrial serial adapters. Its 120 kbps rate is suitable for many asynchronous control and data-transfer applications but is not the choice for higher-bandwidth RS-232 links. The integrated ESD protection improves resilience when the connector is exposed to user-contact transients. Design attention should be given to charge-pump capacitor placement, grounding, and the voltage drop across the external RS-232 connection. The four specified 0.1 µF capacitors should be placed close to their associated pins, and the ground path should be short and continuous. A logic-side supply decoupler and appropriately rated serial connector are also important for reliable operation. This page consolidates the verified manufacturer and distributor information, practical RS-232 design guidance, application fit, and same-footprint replacement context for engineers evaluating the MAX202ID. Distributor pricing and availability should be checked against the current source data before purchase.
MAX202IDG4 - 5V Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202IDG4 is a 5 V dual RS-232 line driver and receiver with two transmit channels, two receive channels, and integrated charge-pump voltage generation. It supports data rates up to 120 kbps, provides ±9 V driver outputs, and includes ±15 kV ESD protection on the serial-port pins. The device is packaged in a 16-pin SOIC. An RS-232 interface transceiver is an interface IC that converts logic-level signals between a computer or embedded controller and the voltage levels used by an RS-232 serial link. In the signal path, the line-driver section converts TTL or CMOS logic into bipolar RS-232 levels, while the receiver section restores the logic signal. As a transceiver, the MAX202IDG4 combines both functions within one package. Key features include a single 5 V supply, dual-driver and dual-receiver configuration, ±15 kV ESD protection, and operation over the industrial temperature range of -40°C to +85°C. The integrated dual charge-pump circuit generates the positive and negative voltages required by the RS-232 drivers, eliminating the need for external supply rails. The ±9 V output swing provides compatibility with standard RS-232 links. The device meets EIA-232-F requirements and supports full-duplex serial communication through two independent driver and receiver paths. Its 120 kbps maximum data rate suits legacy serial ports, industrial control links, service interfaces, and embedded systems that retain an RS-232 connector. The integrated ESD structures improve robustness at connector-facing pins, although external protection and layout practices remain important in exposed environments. Typical applications include industrial serial controllers, laboratory equipment, POS terminals, data-acquisition systems, and service ports for embedded equipment. The MAX202IDG4 is particularly useful where a logic-level UART must communicate with an RS-232 host through a 16-SOIC footprint. When laying out the circuit, place the charge-pump capacitors and the receiver and driver bypass capacitors directly beside their associated pins. Route connector-side traces away from sensitive logic, and connect the interface ground reference properly. Verify the UART baud rate against the device's 120 kbps limit and confirm the cable length against the selected RS-232 standard. This page combines manufacturer specifications, application guidance, drop-in comparison options, and practical interface-design notes to help engineers evaluate the MAX202IDG4 beyond a basic catalog description.
MAX202IDR - 120kbps Dual RS-232 Transceiver | Texas Instruments (Tape & Reel)
The Texas Instruments MAX202IDR is a 5 V dual RS-232 line driver and receiver, commonly called a 2/2 transceiver, with a maximum data rate of 120 kbps and ±15 kV ESD protection in a 16-pin SOIC package. It provides two line drivers, two line receivers, and an onboard dual charge-pump circuit. The interface meets TIA/EIA-232-F requirements and bridges TTL or CMOS logic levels with the positive and negative voltage signaling used by RS-232. An RS-232 transceiver is an interface IC within the broader communications-interface and semiconductor hierarchy. Its driver channels convert logic-level inputs into bipolar RS-232 outputs, while its receiver channels convert bipolar serial inputs into logic-level signals. The MAX202IDR integrates both directions into one package, making it suitable for asynchronous serial links, industrial control links, data acquisition equipment, and legacy computer peripherals. Key features include operation from a single 5 V supply, a 120 kbps maximum signaling rate, ±9 V output levels, and ±15 kV human-body-model ESD protection on the serial-port pins, including ground. Four external 0.1 µF capacitors support the integrated charge pump. The device is designed to be interchangeable with the Maxim MAX202 and is identified as a 16-SOIC part operating across the industrial temperature range. Technically, the MAX202IDR combines two transmit channels and two receive channels with a dual charge pump. The charge pump generates the voltage excursions needed by RS-232 even though the IC itself operates from 5 V. Pin-compatible alternatives identified in the supplied cross-reference material include MAX202EESE+T and MAX202EWE+; their package and terminal compatibility should still be checked against the exact production schematic before substitution. Typical uses include RS-232 links between microcontrollers and external equipment, instrumentation, service interfaces, and industrial serial adapters. Its 120 kbps rate is suitable for many asynchronous control and data-transfer applications but is not the choice for higher-bandwidth RS-232 links. The integrated ESD protection improves resilience when the connector is exposed to user-contact transients. Design attention should be given to charge-pump capacitor placement, grounding, and the voltage drop across the external RS-232 connection. The four specified 0.1 µF capacitors should be placed close to their associated pins, and the ground path should be short and continuous. A logic-side supply decoupler and appropriately rated serial connector are also important for reliable operation. This page consolidates the verified manufacturer and distributor information, practical RS-232 design guidance, application fit, and same-footprint replacement context for engineers evaluating the MAX202IDR. Distributor pricing and availability should be checked against the current source data before purchase.
MAX202IN - 120kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202IN is a 5 V dual RS-232 line driver and receiver with two transmit channels, two receive channels, integrated charge-pump voltage conversion, and ±15 kV human-body-model ESD protection on the serial-port pins. It operates at up to 120 kbit/s and uses external 0.1 µF charge-pump capacitors. The MAX202IN is packaged for through-hole industrial and legacy serial-interface designs, subject to confirmation of the exact ordering code and package variant. An RS-232 transceiver is the interface between a modern controller’s logic-level UART signals and the higher-voltage, ground-referenced RS-232 bus. A line driver converts outgoing logic levels into RS-232 levels, while a line receiver converts incoming bus levels into logic-compatible signals. In the signal-chain hierarchy, the MAX202IN belongs to the interface-IC class and specifically implements an RS-232 line interface for asynchronous serial communication. The verified device data identifies a 5 V supply, 120 kbit/s operation, ±9 V output capability, and ±15 kV ESD protection. These specifications suit equipment that needs bidirectional RS-232 conversion, including PC serial adapters, industrial control links, instrumentation, and legacy peripheral connections. The integrated charge pump generates the bipolar voltage required by RS-232 drivers, reducing the external support circuit compared with discrete implementations. The device uses a dual charge-pump circuit with four small external capacitors. These capacitors must be selected and placed according to the manufacturer datasheet, with short, symmetric routing helping preserve signal and charge-pump performance. The serial-port pins are the primary ESD-sensitive interface, so external protection may still be considered when cables are long, exposed, or routed through industrial environments. Typical applications include multi-drop or point-to-point serial links, service-console equipment, test systems, and embedded controller interfaces that retain an RS-232 physical layer. Because the MAX202IN is designed for 5 V operation, verify the host supply, logic levels, connector wiring, and ground strategy before placing it in a modern 3.3 V design. Do not infer 3.3 V compatibility from the RS-232 signal levels alone. For reliable PCB integration, use the manufacturer’s specified capacitor values, keep the charge-pump loop compact, route driver outputs and receiver inputs away from sensitive analog nodes, and provide a low-impedance ground return. Verify receive thresholds and bus termination against the system cable length and topology. This product page combines the verified manufacturer data, package requirements that remain subject to datasheet confirmation, and application guidance for engineers evaluating a legacy serial interface.
MAX202IPW - 5V Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX202IPW is a 5 V dual-channel RS-232 line driver and receiver rated for data rates up to 120 kbit/s, with ±9 V output swing, ±15 kV ESD protection, and a 16-pin TSSOP package. The device provides two transmit channels and two receive channels for bidirectional serial-port interfaces. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232-compatible differential voltage levels and converts received RS-232 signals back into logic levels. The MAX202 belongs to the RS-232 transceiver hierarchy, combining line drivers, line receivers, and a dual charge-pump circuit in one package. It connects asynchronous communication controllers, such as microcontrollers and UART peripherals, to RS-232 serial ports. Key features include a nominal 5 V supply, operation across a 4.5 V to 5.5 V supply range, ±9 V output swing, and ±15 kV human-body-model ESD protection on the serial-port pins. The IC supports operation to 120 kbit/s and includes on-chip charge-pump circuitry, reducing the external component count compared with discrete RS-232 designs. The MAX202 provides two drivers and two receivers, allowing two RS-232 links to be implemented with one device. Its on-chip dual charge pump generates the voltage conversion required by the transmitter stage. Four external 0.1 µF capacitors support the charge-pump function, and the device is designed to meet TIA/EIA-232-F and ITU V.28 interface requirements. Typical applications include industrial serial-port equipment, data-acquisition systems, point-of-sale terminals, service interfaces, embedded control systems, and legacy peripheral connectivity. The MAX202IPW is particularly appropriate where compact PCB area, bidirectional RS-232 communication, and built-in ESD protection are important. Designers should place the four 0.1 µF charge-pump capacitors close to their associated pins, maintain short return paths, and connect the transceiver ground to the equipment ground. Cable-side ESD protection and isolation requirements should be evaluated separately because the integrated ±15 kV protection specification does not remove the need for a robust mechanical and grounding design. This product data combines the verified manufacturer specifications with same-package replacement analysis, practical layout guidance, and a parameter-by-parameter comparison. It is intended to help engineers identify whether a candidate is truly pin-compatible rather than merely functionally similar.
MAX211CAI+ - +5V RS-232 Transceiver, 4 Drivers/5 Receivers, SSOP-28
The Maxim Integrated MAX211CAI+ is a +5V RS-232 transceiver with four 0.1µF external charge-pump capacitors and integrated DC-DC charge-pump circuitry in a 28-pin SSOP package. It delivers four RS-232 drivers and five RS-232 receivers, supporting data rates in excess of 120 kbps while maintaining ±5V EIA/TIA-232E compliant output levels. The MAX211CAI+ operates from a single +4.5V to +5.5V supply. An RS-232 transceiver is an interface IC that converts logic-level UART signals (0/5V CMOS/TTL) to the bipolar ±5V to ±12V voltage levels required by the legacy EIA/TIA-232E serial communication standard. RS-232 transceivers sit between a microcontroller UART and an external DB9/DB25 connector, providing level shifting, inverting, and electrostatic discharge protection. In the broader component taxonomy, the MAX211CAI+ belongs to line transceivers -> interface ICs -> integrated circuits. Key features include single +5V supply operation (no ±12V rails needed), 4 drivers + 5 receivers, integrated charge pump with four small 0.1µF capacitors, ±5V RS-232 output levels compliant with EIA/TIA-232E, and guaranteed data rate above 120 kbps. The 28-pin SSOP (Shrink Small Outline Package) occupies approximately 40% of the board area of an equivalent 28-pin SO package. The MAX211CAI+ uses Maxim's proprietary charge-pump architecture with a flying capacitor and reservoir capacitors to generate the +10V and -10V rails needed for true RS-232-compliant signaling from a single +5V input. This eliminates the need for multiple system power rails and permits direct connection to any 5V microcontroller UART. The device is built on a BiCMOS process that combines bipolar drivers for robust ±5V output swing with CMOS logic for low power consumption. Typical applications include point-of-sale terminals, industrial control serial ports, legacy PC serial ports, embedded debugging consoles, and any MCU-to-RS232 interface. The MAX211CAI+ is widely used in designs that need to retain compatibility with older RS-232 peripherals while running off a single 5V rail. When designing with the MAX211CAI+, place the four 0.1µF charge-pump capacitors (C1+, C1-, C2+, C2-) as close to the IC pins as possible to minimize parasitic inductance. Use 10µF tantalum or ceramic bypass capacitors on VCC and V+ pins to suppress ripple from the charge-pump switching. For ESD protection on the RS-232 side, add an external TVS diode array rated for ±15kV HBM. This page consolidates distributor pricing (DigiKey, Mouser, LCSC), drop-in alternatives, and practical PCB-layout notes for the MAX211CAI+ that the bare datasheet does not provide.
MAX211CDB - 120 kbit/s 4/5 RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX211CDB is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, operation up to 120 kbit/s, and ±15 kV human-body-model ESD protection on the bus pins. It is packaged in a 28-pin SSOP. According to the Texas Instruments product page, its driver outputs swing to ±9 V, allowing it to meet the voltage requirements of RS-232 systems operating from one 5 V supply. An RS-232 transceiver is an interface IC that converts logic-level signals into differential, voltage-swinged serial signals and converts received RS-232 levels back into logic-level voltages. In the interface hierarchy, the MAX211CDB belongs to the RS-232 transceiver, interface IC, and semiconductor categories. Its four-driver and five-receiver arrangement supports multiport communications equipment while providing three driver channels in shutdown for applications requiring partial low-power operation. Key features include four drivers, five receivers, a 120 kbit/s operating rate, ±9 V driver output swing, ±15 kV ESD protection, and low supply current in shutdown. The integrated charge-pump circuitry supports single-supply operation. These characteristics make the device suitable for computers, industrial controllers, data-acquisition equipment, and other systems that exchange serial data over longer cable runs than TTL or CMOS interfaces can reliably support. The RS-232 electrical interface uses unbalanced, single-ended signaling with a large voltage range relative to common-mode noise. The MAX211CDB is designed for TIA/EIA-232-F and ITU V.28 operation, as stated in the retrieved manufacturer-material summary. Its receiver and driver circuitry provide the voltage translation required at the boundary between digital logic and the RS-232 cable interface. The integrated ESD protection is particularly valuable when an exposed connector receives cable transients. Typical uses include four-wire RS-232 links, multi-channel serial adapters, test equipment, and embedded systems that retain legacy peripheral connections. In a complete interface, the controller UART connects to TTL-level driver inputs, while each driver output feeds an external connector through the application’s protection and routing network. Receivers return cable signals to the UART through external resistor networks when the selected pinout calls for them. Designers should confirm the exact DB package pinout and external charge-pump capacitor values from the manufacturer datasheet. Decoupling capacitors must be placed close to the supply pins, and cable-side routing should minimize exposed stubs. External protection, series resistance, and connector grounding should be selected with the target ESD, surge, and cable-length requirements in mind. This page consolidates verified manufacturer and distributor information, package details, RS-232 design considerations, and drop-in alternatives into an engineering-focused selection resource. It also distinguishes verified specifications from parameters that still require confirmation from the current manufacturer datasheet.
MAX211CDBR - 120 kbit/s 4/5 RS-232 Transceiver | Texas Instruments (Tape & Reel)
The Texas Instruments MAX211CDBR is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, operation up to 120 kbit/s, and ±15 kV human-body-model ESD protection on the bus pins. It is packaged in a 28-pin SSOP. According to the Texas Instruments product page, its driver outputs swing to ±9 V, allowing it to meet the voltage requirements of RS-232 systems operating from one 5 V supply. An RS-232 transceiver is an interface IC that converts logic-level signals into differential, voltage-swinged serial signals and converts received RS-232 levels back into logic-level voltages. In the interface hierarchy, the MAX211CDBR belongs to the RS-232 transceiver, interface IC, and semiconductor categories. Its four-driver and five-receiver arrangement supports multiport communications equipment while providing three driver channels in shutdown for applications requiring partial low-power operation. Key features include four drivers, five receivers, a 120 kbit/s operating rate, ±9 V driver output swing, ±15 kV ESD protection, and low supply current in shutdown. The integrated charge-pump circuitry supports single-supply operation. These characteristics make the device suitable for computers, industrial controllers, data-acquisition equipment, and other systems that exchange serial data over longer cable runs than TTL or CMOS interfaces can reliably support. The RS-232 electrical interface uses unbalanced, single-ended signaling with a large voltage range relative to common-mode noise. The MAX211CDBR is designed for TIA/EIA-232-F and ITU V.28 operation, as stated in the retrieved manufacturer-material summary. Its receiver and driver circuitry provide the voltage translation required at the boundary between digital logic and the RS-232 cable interface. The integrated ESD protection is particularly valuable when an exposed connector receives cable transients. Typical uses include four-wire RS-232 links, multi-channel serial adapters, test equipment, and embedded systems that retain legacy peripheral connections. In a complete interface, the controller UART connects to TTL-level driver inputs, while each driver output feeds an external connector through the application’s protection and routing network. Receivers return cable signals to the UART through external resistor networks when the selected pinout calls for them. Designers should confirm the exact DB package pinout and external charge-pump capacitor values from the manufacturer datasheet. Decoupling capacitors must be placed close to the supply pins, and cable-side routing should minimize exposed stubs. External protection, series resistance, and connector grounding should be selected with the target ESD, surge, and cable-length requirements in mind. This page consolidates verified manufacturer and distributor information, package details, RS-232 design considerations, and drop-in alternatives into an engineering-focused selection resource. It also distinguishes verified specifications from parameters that still require confirmation from the current manufacturer datasheet.
MAX211CDW - 5V 4/5 RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX211CDW is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, ±9 V output levels, ±15 kV ESD protection, and operation up to 120 kbit/s in a 28-pin SOIC package. It provides the electrical interface between an asynchronous communication controller and a serial-port connector. An RS-232 transceiver is an interface IC that combines logic-level driver and receiver circuits with the voltage levels required by the TIA/EIA-232-F and ITU V.28 serial-interface standards. These devices translate low-voltage digital signals into bipolar RS-232 levels at the transmitter and convert received bipolar signals back into logic levels. The MAX211CDW also includes a dual charge-pump circuit for generating the required positive and negative voltage rails. Key features include four RS-232 drivers, five RS-232 receivers, a single 5 V supply, ±15 kV ESD protection on serial-port connection pins, and a maximum data rate of 120 kbit/s. The five receivers provide more receive channels than the four transmit channels, allowing additional modem-control or handshake signals to be monitored without requiring separate receiver circuitry. The MAX211CDW uses a dual charge-pump architecture together with four small external capacitors to produce the bipolar voltage levels required by an RS-232 link. According to the manufacturer product information, the device provides pin-to-pin ESD protection across the serial-port connection pins, including ground, and meets the electrical requirements of TIA/EIA-232-F. These characteristics make the IC appropriate for legacy and industrial asynchronous serial interfaces. Typical applications include industrial equipment controllers, data-acquisition systems, instrument interfaces, point-of-sale equipment, and RS-232 ports on embedded systems. The integrated protection is particularly useful where cables connect to external equipment through long or exposed routes, while the 120 kbit/s rate supports common asynchronous serial protocols and simple command exchanges. Designers should place the charge-pump capacitors close to their associated pins, maintain the recommended external-capacitor values, and provide adequate PCB ground connectivity. Decoupling near VCC is also important because the charge pump and switching elements can return ripple to the supply rail. A clean layout helps preserve signal integrity and makes the protection circuitry more effective. This page consolidates verified manufacturer and distributor information, identifies same-family drop-in candidates, and adds practical placement guidance, comparison parameters, and application-specific selection criteria that are not presented as a single block in the manufacturer datasheet.
MAX211CDWR - 5V 4/5 RS-232 Transceiver | Texas Instruments (Tape & Reel)
The Texas Instruments MAX211CDWR is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, ±9 V output levels, ±15 kV ESD protection, and operation up to 120 kbit/s in a 28-pin SOIC package. It provides the electrical interface between an asynchronous communication controller and a serial-port connector. An RS-232 transceiver is an interface IC that combines logic-level driver and receiver circuits with the voltage levels required by the TIA/EIA-232-F and ITU V.28 serial-interface standards. These devices translate low-voltage digital signals into bipolar RS-232 levels at the transmitter and convert received bipolar signals back into logic levels. The MAX211CDWR also includes a dual charge-pump circuit for generating the required positive and negative voltage rails. Key features include four RS-232 drivers, five RS-232 receivers, a single 5 V supply, ±15 kV ESD protection on serial-port connection pins, and a maximum data rate of 120 kbit/s. The five receivers provide more receive channels than the four transmit channels, allowing additional modem-control or handshake signals to be monitored without requiring separate receiver circuitry. The MAX211CDWR uses a dual charge-pump architecture together with four small external capacitors to produce the bipolar voltage levels required by an RS-232 link. According to the manufacturer product information, the device provides pin-to-pin ESD protection across the serial-port connection pins, including ground, and meets the electrical requirements of TIA/EIA-232-F. These characteristics make the IC appropriate for legacy and industrial asynchronous serial interfaces. Typical applications include industrial equipment controllers, data-acquisition systems, instrument interfaces, point-of-sale equipment, and RS-232 ports on embedded systems. The integrated protection is particularly useful where cables connect to external equipment through long or exposed routes, while the 120 kbit/s rate supports common asynchronous serial protocols and simple command exchanges. Designers should place the charge-pump capacitors close to their associated pins, maintain the recommended external-capacitor values, and provide adequate PCB ground connectivity. Decoupling near VCC is also important because the charge pump and switching elements can return ripple to the supply rail. A clean layout helps preserve signal integrity and makes the protection circuitry more effective. This page consolidates verified manufacturer and distributor information, identifies same-family drop-in candidates, and adds practical placement guidance, comparison parameters, and application-specific selection criteria that are not presented as a single block in the manufacturer datasheet.
MAX211CWI+ - 4/5 RS-232 Transceiver | Analog Devices
The Analog Devices MAX211CWI+ is a single-supply RS-232 and V.28 transceiver with four drivers, five receivers, integrated charge-pump circuitry, and a 28-pin wide SOIC package. It operates from 4.5V to 5.5V and supports data rates in excess of 120kbps. The device uses 0.1uF external charge-pump capacitors, while its drivers maintain the ±5V EIA/TIA-232E output levels specified for loaded operation. An RS-232 transceiver is an interface IC that converts between single-ended logic signals and the bipolar voltage levels used by RS-232 links. In the signal hierarchy, MAX211CWI+ belongs to interface ICs and uses driver and receiver sections to connect digital equipment across a serial cable. Its integrated charge pump doubles the supply and inverts it to produce positive and negative transmitter voltages from one +5V input. The principal feature is its four-driver, five-receiver arrangement, which suits equipment with several serial ports, control signals, or status lines. The MAX211 family is specified for data rates above 120kbps and uses four external 0.1uF capacitors for charge-pump operation. The wide SOIC package provides a leaded surface-mount format while keeping the board footprint compatible with the MAX211 family variants identified in the supplied references. The MAX211CWI+ is intended for +5V systems that need RS-232 drivers and receivers rather than RS-422 or RS-485 differential signaling. It can be used in data acquisition, industrial control, test equipment, and embedded serial ports. Because RS-232 is a single-ended, unbalanced interface, cable routing, grounding, and protection against transients remain important system-level considerations. A key design consideration is that the external charge-pump capacitors must be placed close to the device and selected according to the manufacturer guidance. The receiving logic threshold and driver output levels should be checked against the connected equipment, especially when cables are long or the link includes unprotected industrial wiring. The supplied data does not provide a full electrical limit table, so values not explicitly stated there are marked as data needed rather than inferred. This page combines the verified manufacturer and distributor product information with a cautious selection guide, package-aware comparison, and practical integration notes. It distinguishes confirmed MAX211 family details from parameters that require the complete manufacturer datasheet before design release.
MAX211EAI+ - 120kbps 4/5 RS-232 Transceiver | Analog Devices
The Analog Devices MAX211EAI+ is a +5 V RS-232 and V.28 transceiver with four line drivers, five line receivers, and integrated charge-pump circuitry in a 28-pin SSOP package. It supports data rates up to 120 kbps and uses four 0.1 uF external capacitors. The device provides the electrical interface between an asynchronous communication controller and an RS-232 serial-port connector. An RS-232 transceiver is an interface IC that converts logic-level signals between a host controller and a cable-based serial link. The MAX211 family combines drivers, receivers, and voltage-conversion circuitry into a single interface device. It belongs to the interface IC hierarchy and allows a +5 V system to communicate through RS-232 without requiring separate negative supply rails or external line-driver ICs. The MAX211EAI+ supports EIA/TIA-232E and CCITT V.28 operation at data rates up to 120 kbps when loaded according to the cited standards. Its four drivers maintain approximately plus or minus 5 V EIA/TIA-232E output levels, while the five receivers support the logic-side receive function. Four external 0.1 uF charge-pump capacitors allow operation from a single +5 V supply. The integrated dual charge-pump architecture generates the voltage required by the RS-232 line drivers and reduces the number of external supply rails required by the design. The MAX211EAI+ is packaged in the 28-pin SSOP package, identified as EAI in the ordering code. This package provides a compact option for industrial and communication equipment where board area is constrained but a conventional through-hole RS-232 package is unnecessary. Typical uses include industrial serial controllers, instrumentation, POS terminals, data-acquisition equipment, and embedded systems that require a +5 V RS-232 port. The 120 kbps capability is suitable for moderate-speed asynchronous serial communication, while the integrated drivers and receivers reduce the component count compared with separate transmitter and receiver devices. PCB design must reserve the four specified 0.1 uF capacitors and maintain the charge-pump routing recommended by the manufacturer datasheet. Keep high-current charge-pump loops compact, provide an uninterrupted ground plane, and place interface protection close to the connector because external cables can introduce ESD and surge events. This page combines verified manufacturer information, distributor availability, family-level drop-in guidance, package details, and practical PCB design considerations to help engineers evaluate the MAX211EAI+ for compact +5 V RS-232 interface designs.
MAX211EEAI+ 4/5 RS-232 Transceiver | Analog Devices
Analog Devices MAX211EEAI+ is a four-driver, five-receiver RS-232 and V.28 transceiver with an integrated charge pump for operation from a single +5 V supply. It supports data rates in excess of 120 kbps, provides ±15 kV ESD protection on the RS-232 interface, and is packaged in a 28-pin SSOP. The MAX211 family is designed for bidirectional serial communication systems that require TTL/CMOS logic interfacing, compliant ±5 V RS-232 signal levels, and enhanced electrostatic protection. An RS-232 transceiver is an interface IC that converts between single-ended TTL or CMOS logic levels and differential, bipolar RS-232 signals. In the broader semiconductor hierarchy, the MAX211EEAI+ belongs to the interface IC family, combining line drivers, line receivers, and charge-pump voltage generation in one device. This integration allows a host controller or UART to connect to a cable-based RS-232 port without external level-shifting transistors or a separate negative supply rail. The device includes four TTL-compatible transmitters and five receivers. The transmitters produce the ±5 V output levels required by EIA/TIA-232E, while the receivers convert incoming RS-232 signals into logic-compatible levels. Its integrated charge-pump circuitry generates the positive and negative voltages required by the RS-232 drivers from one +5 V supply. The MAX211EEAI+ also supports data rates above 120 kbps when operated in accordance with the EIA/TIA-232E loading requirements. A major feature of the MAX211EEAI+ is its ±15 kV human-body-model ESD protection, which improves interface robustness in environments where cables may be connected or disconnected. The receive and transmit sections provide practical channel counts for systems requiring several serial links, status inputs, control signals, or bidirectional communication through one RS-232 connector. Its 28-pin SSOP package offers a compact surface-mount footprint compared with the larger 28-pin wide SO option also offered in the MAX211 family. Typical uses include industrial equipment interfaces, data-acquisition systems, instrumentation, service consoles, embedded serial adapters, and legacy peripheral connectivity. The device is especially useful when an embedded controller must communicate through a multi-channel RS-232 interface while maintaining a single +5 V power architecture. Because it is a bipolar RS-232 interface rather than a modern differential bus transceiver, it is best suited to point-to-point cable links and compatible equipment rather than long-distance, high-noise industrial Ethernet-style networks. Designers should provide the charge-pump capacitors specified by the manufacturer, connect unused inputs to defined logic levels, and treat the ESD-protected RS-232 pins as external connector pins. Keep the interface ground reference connected with the signal cable, route the interface connector and cable away from sensitive analog signals, and validate the complete board under the grounding conditions of the target system. This page combines the manufacturer specifications, package details, application guidance, comparison information, and verified drop-in candidates for engineers evaluating the MAX211EEAI+. It also highlights practical distinctions among confirmed SSOP-28 alternatives so PCB reuse can be assessed without confusing a package-compatible device with an electrically equivalent but differently pinned part.
MAX211EWI+ - 4/5 RS-232 Transceiver, 5V, 120kbps | ADI
The Analog Devices MAX211EWI+ is a four-driver, five-receiver RS-232 and V.28 transceiver designed for single +5 V supply operation. It supports data rates in excess of 120 kbps, maintains ±5 V EIA/TIA-232E driver output levels, and uses an integrated charge pump to generate the bipolar voltages required by RS-232. The device is supplied in a 28-pin wide SOIC package and requires four external 0.1 µF capacitors for charge-pump operation. An RS-232 transceiver is an interface IC that converts logic-level signals between a host or controller and a cable-based RS-232 link. Within the interface hierarchy, the MAX211EWI+ combines a charge-pump voltage converter, RS-232 line drivers, and line receivers into one mixed-signal device. This integration allows a single +5 V system to communicate with legacy RS-232 equipment without a separate negative supply or external RS-232 line-power circuit. Key features include four RS-232 drivers, five receivers, operation above 120 kbps, integrated charge-pump circuitry, and single-supply operation from a nominal +5 V rail. The four external 0.1 µF capacitors required by the EWI+ variant simplify voltage generation but must be placed close to their designated pins to limit charge-pump switching noise. The device provides ±5 V driver levels while operating from a 5 V supply, matching the classic RS-232 electrical requirement for bipolar signaling. The MAX211 architecture divides the transceiver into a charge-pump converter, four driver channels, and five receiver channels. Its integrated charge pump generates the positive and negative rail voltages used by the drivers. Because these rails are switched internally, PCB layout and capacitor placement materially affect radiated and conducted noise. The wide SOIC outline offers adequate lead spacing for through-hole assembly while occupying less area than a 28-pin standard SOIC. Typical applications include industrial serial controllers, test equipment, point-of-sale terminals, instrumentation, and data-acquisition systems. Five receiver channels allow one port to monitor four incoming RS-232 lines while the fourth transmitter drives a separate link, making the device useful for console and diagnostic interfaces. The 120 kbps-plus capability is appropriate for configuration links and moderate-rate data transfers rather than modern high-speed serial protocols. Designers should treat the external charge-pump capacitors and signal routing as critical layout elements. Keep the four 0.1 µF capacitors adjacent to their charge-pump pins, route the charge-pump output as a short and quiet net, and provide adequate bypass capacitance on the +5 V supply. Because the MAX211EWI+ is a legacy RS-232 interface rather than an EIA/TIA-422 or RS-485 transceiver, cable length, grounding, and protection-network design remain application-specific responsibilities. This page combines manufacturer specifications, distributor references, drop-in family alternatives, and application-focused design guidance. It highlights the practical differences between temperature and packaging order codes and identifies the verification gaps that must be closed before a PCB redesign or cross-brand substitution is approved.
MAX211IDB - 5V RS-232 Transceiver, 120kbps, ±15kV ESD | TI
The Texas Instruments MAX211IDB is a 5-V multichannel RS-232 line driver/receiver with ±15 kV ESD protection, packaged in a 28-pin SSOP (DB). The device integrates four line drivers, five line receivers, and a dual charge-pump circuit, supports data rates up to 120 kbps, and provides ±9 V output swing for compliant TIA/EIA-232-F signaling. What is an RS-232 line driver/receiver? An RS-232 transceiver is an interface IC that translates between the low-voltage logic levels used by a UART or microcontroller (typically 0 V to 5 V or 3.3 V) and the higher-voltage bipolar signaling levels required by the legacy TIA/EIA-232-F standard (±5 V to ±15 V). It belongs to the broader family of line transceivers (interface ICs > drivers, receivers, transceivers) and acts as the electrical translator between an asynchronous communication controller and a DB-9 or DB-25 serial-port connector. The on-chip charge pump generates the bipolar rails from a single 5 V supply, eliminating the need for external ±12 V power. Key features of the MAX211IDB include integrated dual charge pump with four external 0.1 µF capacitors, ±15 kV ESD protection on serial-port connection pins (Human-Body Model per TIA/EIA-232-F requirements), four drivers and five receivers, true TTL/CMOS input compatibility on receiver inputs, and a low 1.5 mA typical supply current. The device operates from a single 5 V supply and requires no external ±12 V rails, simplifying industrial and embedded designs. Internally the MAX211IDB uses a switched-capacitor voltage converter (charge pump) to derive +10 V and -10 V from the 5 V input. These rails feed the drivers, allowing them to swing beyond the supply rails per RS-232 specifications. The drivers are inverting (true RS-232 inverters), while the receivers invert again so overall the data path is non-inverting between the UART TX/RX lines and the cable-side DTR/DSR/RTS/CTS/RI/DCD lines. Typical applications include industrial PCs and point-of-sale terminals, serial-port debug consoles on embedded systems, legacy modem interfaces, factory automation controllers, and any system requiring TIA/EIA-232-F signaling from a single 5 V rail. When designing with this part, place the four charge-pump capacitors as close to the IC pins as possible and provide adequate ground plane beneath the SSOP-28 body to keep EMI and supply ripple low.
MAX211IDBR - 5V RS-232 Transceiver, 120kbps, ±15kV ESD | TI (Tape & Reel)
The Texas Instruments MAX211IDBR is a 5-V multichannel RS-232 line driver/receiver with ±15 kV ESD protection, packaged in a 28-pin SSOP (DB). The device integrates four line drivers, five line receivers, and a dual charge-pump circuit, supports data rates up to 120 kbps, and provides ±9 V output swing for compliant TIA/EIA-232-F signaling. What is an RS-232 line driver/receiver? An RS-232 transceiver is an interface IC that translates between the low-voltage logic levels used by a UART or microcontroller (typically 0 V to 5 V or 3.3 V) and the higher-voltage bipolar signaling levels required by the legacy TIA/EIA-232-F standard (±5 V to ±15 V). It belongs to the broader family of line transceivers (interface ICs > drivers, receivers, transceivers) and acts as the electrical translator between an asynchronous communication controller and a DB-9 or DB-25 serial-port connector. The on-chip charge pump generates the bipolar rails from a single 5 V supply, eliminating the need for external ±12 V power. Key features of the MAX211IDBR include integrated dual charge pump with four external 0.1 µF capacitors, ±15 kV ESD protection on serial-port connection pins (Human-Body Model per TIA/EIA-232-F requirements), four drivers and five receivers, true TTL/CMOS input compatibility on receiver inputs, and a low 1.5 mA typical supply current. The device operates from a single 5 V supply and requires no external ±12 V rails, simplifying industrial and embedded designs. Internally the MAX211IDBR uses a switched-capacitor voltage converter (charge pump) to derive +10 V and -10 V from the 5 V input. These rails feed the drivers, allowing them to swing beyond the supply rails per RS-232 specifications. The drivers are inverting (true RS-232 inverters), while the receivers invert again so overall the data path is non-inverting between the UART TX/RX lines and the cable-side DTR/DSR/RTS/CTS/RI/DCD lines. Typical applications include industrial PCs and point-of-sale terminals, serial-port debug consoles on embedded systems, legacy modem interfaces, factory automation controllers, and any system requiring TIA/EIA-232-F signaling from a single 5 V rail. When designing with this part, place the four charge-pump capacitors as close to the IC pins as possible and provide adequate ground plane beneath the SSOP-28 body to keep EMI and supply ripple low.