Interface ICs
Subcategories
Products (3,400+)
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.
MAX211IDW - 5V 120kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX211IDW is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, and ±15 kV ESD protection, packaged in a 28-pin SOIC. It supports data rates up to 120 kbit/s and operates across the industrial -40°C to +85°C temperature range. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts received line-level signals back into digital logic. Within the interface hierarchy, MAX211IDW is a multichannel RS-232 transceiver built around four RS-232 line drivers, five line receivers, and a dual charge-pump circuit. This topology allows multiple serial channels to share one supply while providing bipolar voltage generation for the driver outputs. Key features include a 5 V supply, operation to 120 kbit/s, four line drivers, five line receivers, and ±15 kV ESD protection across the serial-port connection pins, including ground. The device is designed to meet the requirements of TIA/EIA-232-F and ITU V.28. Its additional fifth receiver provides flexibility for monitoring a modem handshake signal when the four main driver and receiver channels are already assigned. The MAX211 architecture uses a dual charge-pump circuit to generate the positive and negative voltages required by RS-232 drivers. Four small external capacitors support charge-pump operation. The resulting interface can place a communication controller on the logic side and a DB9 or other RS-232 connector on the line side without requiring discrete level-shifting circuits. Pin-to-pin ESD protection extends robustness across exposed serial-port connections. Typical uses include industrial serial-port adapters, data-acquisition equipment, POS terminals, service interfaces, and legacy computer peripherals. The 120 kbit/s operating rate supports moderate-speed asynchronous communication, while the four-driver and five-receiver arrangement is useful for systems requiring several handshake or control lines. The -40°C to +85°C range also suits industrial environments where commercial-temperature interface ICs may be insufficient. Designers should use the manufacturer's charge-pump capacitor and bypass-capacitor recommendations, place the external capacitors close to their pins, and keep sensitive logic and communications routing separated from exposed connector and ESD paths. The device is marked last-time-buy by a verified distributor listing, so new designs should confirm availability and consider a supported modern interface before committing to a large production run. This page combines verified manufacturer and distributor information with lifecycle context, drop-in alternatives, comparison parameters, and practical interface-design guidance. It highlights where MAX211IDW remains suitable for multichannel RS-232 and where supply availability or newer USB-to-serial solutions may be more appropriate.
MAX211IDWR - 5V 120kbps RS-232 Transceiver | Texas Instruments (Tape & Reel)
Texas Instruments MAX211IDWR is a 5 V multichannel RS-232 line driver and receiver with four drivers, five receivers, and ±15 kV ESD protection, packaged in a 28-pin SOIC. It supports data rates up to 120 kbit/s and operates across the industrial -40°C to +85°C temperature range. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts received line-level signals back into digital logic. Within the interface hierarchy, MAX211IDWR is a multichannel RS-232 transceiver built around four RS-232 line drivers, five line receivers, and a dual charge-pump circuit. This topology allows multiple serial channels to share one supply while providing bipolar voltage generation for the driver outputs. Key features include a 5 V supply, operation to 120 kbit/s, four line drivers, five line receivers, and ±15 kV ESD protection across the serial-port connection pins, including ground. The device is designed to meet the requirements of TIA/EIA-232-F and ITU V.28. Its additional fifth receiver provides flexibility for monitoring a modem handshake signal when the four main driver and receiver channels are already assigned. The MAX211 architecture uses a dual charge-pump circuit to generate the positive and negative voltages required by RS-232 drivers. Four small external capacitors support charge-pump operation. The resulting interface can place a communication controller on the logic side and a DB9 or other RS-232 connector on the line side without requiring discrete level-shifting circuits. Pin-to-pin ESD protection extends robustness across exposed serial-port connections. Typical uses include industrial serial-port adapters, data-acquisition equipment, POS terminals, service interfaces, and legacy computer peripherals. The 120 kbit/s operating rate supports moderate-speed asynchronous communication, while the four-driver and five-receiver arrangement is useful for systems requiring several handshake or control lines. The -40°C to +85°C range also suits industrial environments where commercial-temperature interface ICs may be insufficient. Designers should use the manufacturer's charge-pump capacitor and bypass-capacitor recommendations, place the external capacitors close to their pins, and keep sensitive logic and communications routing separated from exposed connector and ESD paths. The device is marked last-time-buy by a verified distributor listing, so new designs should confirm availability and consider a supported modern interface before committing to a large production run. This page combines verified manufacturer and distributor information with lifecycle context, drop-in alternatives, comparison parameters, and practical interface-design guidance. It highlights where MAX211IDWR remains suitable for multichannel RS-232 and where supply availability or newer USB-to-serial solutions may be more appropriate.
MAX213ECAI+ - 5V RS-232 Transceiver, 15kV ESD, SSOP-28 | Maxim
The Maxim Integrated MAX213ECAI+ is a +5V-powered RS-232 transceiver with integrated charge-pump circuitry and ±15kV ESD protection, housed in a 28-pin SSOP package. It provides four drivers and five receivers in a TTL tri-state-compatible interface, operates from a single 4.5V to 5.5V supply, and supports data rates up to 120 kbps for asynchronous serial communication. A RS-232 transceiver is an interface IC that converts between TTL/CMOS logic levels (0V/5V) and the bipolar ±5V to ±15V signalling required by the RS-232 standard. It belongs to the broader family of line transceivers (RS-232, RS-422, RS-485), which themselves sit inside the interface ICs category and the larger umbrella of wired communication semiconductor components. By embedding the charge pump on-chip, the MAX213 eliminates the need for external ±12V supplies, simplifying PCB design in point-of-sale terminals, industrial controllers and embedded computing platforms. Key features include ±15kV ESD protection on every transmitter output and receiver input (per HBM), four RS-232 drivers and five RS-232 receivers in the SSOP-28 footprint, tri-state TTL/CMOS compatible receiver outputs, and an integrated charge pump that requires only four external 0.1 µF capacitors. The device operates across the commercial 0°C to 70°C temperature range, and its low supply current (~20 mA typical, unloaded) suits battery-backed systems that must wake serial ports only during transactions. Technically, the MAX213ECAI+ uses Maxim's BiCMOS process that combines bipolar drive transistors (for true ±5V RS-232 swing) with CMOS control logic. The charge pump runs as a voltage doubler and inverter from VCC=5V, generating V+ ≈ +10V and V- ≈ -10V which feed the driver output stages. Receivers implement a 0.8V/2.4V-thresholded Schmitt-trigger input structure with 5 kΩ pull-down resistors to ground, ensuring a defined logic-high output when the input is open-circuited. Internal slew-rate control limits data rates to ~120 kbps, which is well matched to legacy serial peripherals, debug consoles and embedded modem links. Typical applications include industrial PCs and point-of-sale equipment needing multi-port serial expansion, embedded microcontroller debug consoles, GPS receivers and GSM/cellular modules with RS-232 interfaces, and legacy peripheral interfaces such as optical mice, bar-code scanners and serial printers where robust ±15kV ESD handling protects against hot-plug discharge. When designing with this IC, keep charge-pump capacitor traces short (less than ~10 mm) and place the four 0.1 µF ceramics as close to C1+, C1-, C2+, C2- pins as possible. Reserve TVS diodes externally on the connector side for ESD events that exceed the on-chip rating, especially for cables longer than 3 metres. This page consolidates distributor pricing, drop-in alternative MPNs and practical PCB layout notes that go beyond the manufacturer's datasheet, giving engineers a one-stop reference for selecting, sourcing and laying out the MAX213ECAI+.
MAX22025AWA+ - 3.5kVRMS Isolated RS-485 Transceiver | ADI
The Analog Devices (formerly Maxim Integrated) MAX22025AWA+ is a compact, isolated half-duplex RS-485/RS-422 transceiver that integrates 3.5kVRMS of digital galvanic isolation in an 8-pin wide-body SOIC package. It supports data rates up to 500 kbps and operates from a single 3.3V supply on the UART side, eliminating the need for an external isolated DC-DC converter in many designs. The wide-body SOIC provides 5.5mm of creepage, meeting IEC 60664 reinforced insulation requirements for industrial and renewable-energy installations. An RS-485/RS-422 transceiver is a differential line driver/receiver IC that translates a single-ended UART signal into a balanced differential pair. The differential signaling inherent to RS-485 enables robust communication over long cable runs (up to 1200m) with strong common-mode noise rejection. Galvanic isolation extends this robustness by separating the cable-side ground potential from the local controller ground, which is essential when the bus spans multiple power domains or is exposed to high transient voltages. Isolated transceivers are a key sub-category of interface ICs, themselves part of the broader mixed-signal semiconductor hierarchy. Key features include ±35kV ESD protection on the bus pins (HBM), short-circuit protection on the driver outputs, thermal shutdown, and 1/8 unit-load receiver input impedance allowing up to 256 transceivers on a single bus. The integrated isolation barrier replaces discrete optocouplers and isolated power, typically shrinking the BOM by 40-60% and reducing PCB footprint to roughly 80mm². The device supports -40°C to +85°C operation and is specified over a wide 3.0V to 5.5V UART-side VDD range. Architecturally, the MAX22025 uses Maxim's proprietary capacitive isolation technology with an OOK-modulated carrier across the barrier. The cable-side driver meets the RS-485 standard's 1.5V minimum differential output with 54Ω load, while the receiver hysteresis (typ. 30mV) ensures clean switching even on heavily attenuated signals. On-chip deglitch filters suppress transient bus spikes up to 150ns. Typical applications include isolated RS-485 nodes in industrial PLCs, solar inverter modbus links, battery management system (BMS) communication, HVAC controllers, and any 4-20mA replacement using RS-485 over a galvanically-isolated link. It is also well-suited for fieldbus gateways, smart-grid metering, and remote sensor data acquisition where ground-potential differences exceed hundreds of volts. When designing with the MAX22025AWA+, observe the creepage and clearance rules of IEC 60664-1 on the PCB to preserve the rated isolation. A bypass capacitor of 0.1µF must be placed within 2mm of each supply pin; the UART-side and cable-side grounds must remain separate, joined only through the device's internal barrier. Verify the driver slew rate at your chosen data rate to control EMI.
MAX222CN - 5V Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX222CN is a 5 V dual RS-232 line driver and receiver, also described as a two-driver, two-receiver full-duplex transceiver, with operation to 200 kbit/s and ±15 kV human-body-model ESD protection in an 18-pin PDIP package. The device is intended for legacy and industrial RS-232 links where a 5 V supply, through-hole construction, and dual-channel signal conditioning are required. An RS-232 transceiver is an interface IC that combines differential line-driver and receiver functions into a system-facing serial port. Its hierarchy is transceiver > RS-232 interface > line driver/receiver > semiconductor. The MAX222CN translates logic-level signals between a host UART and RS-232 line drivers, while its receivers convert incoming RS-232 levels into CMOS-compatible digital signals. The integrated dual-channel arrangement reduces the component count for two-wire, full-duplex RS-232 communication. Key verified features include a 5 V VCC supply, operation to 200 kbit/s, ±15 kV human-body-model ESD protection, low shutdown supply current, and external-capacitor charge-pump operation using 0.1 µF. The listed standards claim compliance with or exceedance of TIA/EIA-232-F and ITU V.28 requirements. Its 18-pin PDIP package supports through-hole PCB assembly rather than compact surface-mount layouts. The MAX222CN is a legacy RS-232 interface, not an RS-485 transceiver and not a modern USB-to-serial converter. Its receiver hysteresis and supply range are listed in distributor data, while the complete electrical limits should be checked in the manufacturer datasheet before using the part outside the stated conditions. The dual drivers and receivers support point-to-point RS-232 links, instrumentation connections, and embedded systems that already expose a UART. Typical uses include industrial control consoles, test equipment, serial adapters, and legacy peripheral interconnects. The principal design consideration is that RS-232 is a single-ended, unbalanced interface intended for shorter distances than differential buses. Designers should use suitable protection, grounding, and cable practices, and should not treat ±15 kV ESD protection as a substitute for external surge or lightning protection. This page consolidates the verified distributor descriptions, package information, RS-232 capability, and cross-reference research for MAX222CN. It does not invent electrical limits, pricing, or pin assignments that were not supplied in the verified data.
MAX222IN - 5V Dual RS-232 Interface | Texas Instruments
The Texas Instruments MAX222IN is a 5 V dual RS-232 line driver and receiver with ±15 kV ESD protection, operating at up to 200 kbit/s in an 18-pin PDIP package. It provides two transmit channels and two receive channels, making it suitable for bidirectional serial interfaces, instrumentation, industrial control, and data acquisition equipment. The device is designed to meet TIA/EIA-232-F and ITU V.28 interface requirements while operating from a single 5 V supply. An RS-232 transceiver is an interface IC that converts logic-level digital signals between a host or controller and a RS-232 communication link. Unlike a differential bus such as RS-485, RS-232 uses single-ended signaling with positive and negative voltage levels. The MAX222IN combines drivers, receivers, and internal level-shift capability in one package, reducing the number of external interface components required in a conventional RS-232 port. The MAX222IN operates from a 5 V VCC supply and supports data rates up to 200 kbit/s. Its two drivers and two receivers support full-duplex point-to-point communication when connected to the corresponding RS-232 lines. The verified product description also identifies ±15 kV human-body-model ESD protection, low shutdown supply current, and operation over a -40 °C to +85 °C temperature range. These characteristics make the device appropriate for both commercial and industrial equipment. The MAX222IN is packaged in an 18-pin PDIP, identified by the N package designation in the part number. The through-hole package is appropriate for systems assembled with conventional plated-through-hole components and for prototypes or industrial controllers where through-hole interchangeability is useful. The verified distributor listing identifies the device as a 2/2 full RS-232 transceiver in an 18-PDIP package. Typical uses include RS-232 ports in test equipment, serial adapters, embedded controllers, industrial instrumentation, and communications equipment. Designers should provide the required charge-pump capacitors, connect the supply and ground correctly, and route the RS-232 connector-side signals away from sensitive low-level circuitry. External protection, grounding, and isolation may be required when the cable is exposed to long, unshielded, or electrically noisy environments. The product information supplied here combines distributor listings, datasheet search results, and the MAX222 family datasheet link. It distinguishes verified specifications from unavailable parameters and does not infer electrical limits that are not present in the supplied data.
MAX22513ATI+ - Dual IO-Link Transceiver, 36V, TQFN-28 | ADI
The Analog Devices MAX22513ATI+ is a dual-channel, low-power IO-Link device transceiver integrating a selectable control interface, a high-efficiency internal DC-DC buck regulator, two internal linear regulators, and integrated surge protection on every IO pin. Housed in a 28-pin TQFN-EP (5.5mm body) surface-mount package, the part operates from 8V to 36V and delivers C/Q plus DO/DI drivers with selectable current limits and overcurrent protection to minimize dissipation in fault conditions. The integrated surge protection of ±1kV/500Ω on all four IO pins (V24, C/Q, DO/DI, GND) is unique among IO-Link transceivers and eliminates external TVS arrays in most designs. An IO-Link device transceiver is a mixed-signal interface that sits between an industrial sensor/actuator and an IO-Link master, handling the IEC 61131-9 physical layer: the C/Q line carries the wake-up pulse, the COM1/COM2/COM3 framed communication, and the high-current switching output; DO/DI provides an auxiliary digital channel. IO-Link transceivers belong to the broader category of industrial sensor interfaces -> more generally to line drivers/receivers -> and finally to wired communication ICs, which are themselves a subset of mixed-signal semiconductors used in factory-automation networks. Key differentiating features include: an integrated high-efficiency step-down DC-DC converter that generates the 5V or 3.3V logic rail directly from the 24V industrial bus, eliminating an external switching IC; reverse-voltage, short-circuit, and surge protection on all four IO pins; very low on-resistance C/Q and DO/DI drivers; selectable driver current limits to match load requirements; and low quiescent current for IEC 61131-9 sleep/wake behavior. The selectable interface (SPI or pin-strapped logic) lets the same silicon serve multiple microcontroller families. The 28-TQFN-EP package has an exposed pad that drops θJA low enough to dissipate the buck regulator's thermal load without an external heatsink at typical 24V→5V/200mA operating points. Typical applications include 24V industrial sensor heads (photoelectric, proximity, ultrasonic), IO-Link valve manifolds, IO-Link actuators, and remote I/O blocks on Profinet/EtherNet/IP fieldbus modules. The combination of surge protection and integrated DC-DC keeps the BOM small for IP67 sensor heads where PCB area is constrained and external protection networks are difficult to source. Designers should budget for the buck regulator's inductor and output capacitors per the datasheet typical application circuit, and verify that the surge protection rating meets the end-application EMC standard (IEC 61000-4-5). The exposed pad requires multiple thermal vias to the inner copper layers for adequate heat extraction at full-load buck operation. This page synthesizes distributor pricing, drop-in alternatives, IO-Link protocol design considerations, and PCB layout notes not collected in the manufacturer datasheet alone.
MAX232ACPE+ - RS-232 Transceiver, 5V, PDIP-16 | Maxim
The Maxim Integrated MAX232ACPE+ is a +5 V RS-232 line-driver and receiver interface IC with two transmit channels and two receive channels in a 16-pin PDIP package. It supports the MAX220–MAX249 family use case for EIA/TIA-232E and V.28/V.24 communications interfaces where ±12 V supplies are unavailable. The verified distributor listings identify the part as a 5 V-powered multichannel RS-232 driver/receiver, while the target MPN is the +5 V-listed MAX232ACPE+ variant. An RS-232 transceiver is an interface IC that translates digital logic levels between a host or controller and a RS-232 cable. A driver converts TTL or CMOS signals into RS-232-level signals, while a receiver converts transmitted RS-232 levels back into logic levels. The MAX232ACPE+ is therefore placed between a digital system and an external serial connector, providing bidirectional communication through two driver and two receiver channels. The manufacturer family description states that the MAX220–MAX249 devices are intended for EIA/TIA-232E and V.28/V.24 communications interfaces, particularly where ±12 V is not available. The +5 V-powered architecture supports systems whose logic supply is commonly 5 V. The verified data also identifies the part as a 2/2 transceiver and as a 5 V multichannel RS-232 driver/receiver. Exact electrical limits, slew rates, receiver thresholds, supply-current figures, and temperature limits are marked as DATA_NEEDED because they are not included in the supplied verified excerpts. Typical uses include RS-232 console links, industrial-control serial ports, test equipment, embedded serial adapters, and legacy peripheral connections. The MAX232ACPE+ is appropriate when the board requires a conventional through-hole RS-232 interface and a 16-pin PDIP footprint. Designers should verify the complete datasheet pinout, charge-pump capacitor requirements, logic levels, data-rate limits, and ESD requirements before production release, because those values are not present in the supplied source snippets. The key design consideration is to treat the MAX232ACPE+ as a physical-layer interface rather than a protocol converter. The application must handle framing, baud-rate configuration, parity, flow control, and connector wiring separately. External charge-pump capacitors, input/output protection, grounding, and cable routing remain important in a working RS-232 design. The MAX232ACPE+ is best selected when a 16-pin PDIP RS-232 transceiver with two drivers and two receivers is required and the existing board already matches the verified package and pin arrangement. This page combines the verified distributor identity, manufacturer-family interface description, package information, and sourced cross-reference data. It does not infer unprovided electrical specifications, lifecycle claims, pricing values, compliance status, or complete pin assignments.
MAX232ACSE+T - 5V RS-232 Transceiver, 2 Driver/2 Receiver | Maxim Integrated
The Analog Devices (Maxim Integrated) MAX232ACSE+T is a +5V-powered, multichannel RS-232 driver/receiver IC delivering 2 drivers and 2 receivers in a 16-pin narrow-body SOIC (NSOIC-16) package. It operates from a single 4.5V to 5.5V supply, integrates a charge-pump DC-DC converter that generates the ±10V RS-232 signal swings from the +5V rail, and supports data rates up to 200 kbps. The +T suffix denotes tape-and-reel packaging. What is an RS-232 transceiver? An RS-232 transceiver is a type of line driver/receiver IC that translates logic-level UART signals (0V/5V or 0V/3.3V) to the bipolar ±5V to ±15V voltage levels defined by the EIA/TIA-232E and V.28/V.24 standards, enabling reliable data transmission between a microcontroller/FPGA and legacy serial ports, modems, point-of-sale terminals, and industrial instrumentation over cables up to 15 meters. The MAX232 family belongs to the broader category hierarchy: RS-232 transceiver -> line driver/receiver -> interface IC -> integrated circuit -> semiconductor. Key features include a wide +4.5V to +5.5V single-supply range, on-board dual charge pump (no external ±12V required), 200 kbps guaranteed data rate, ±30V receiver input tolerance (HBM ESD on older MAX232 revisions), 1 µA low-power shutdown mode, and integrated ESD protection on the RS-232 pins (device-dependent). The NSOIC-16 surface-mount package provides a compact footprint suitable for industrial, embedded, and consumer designs. The architecture uses an internal oscillator and four external 0.1uF charge-pump capacitors (C1+, C1-, C2+, C2-, V+, V-) to generate the required RS-232 voltage rails from a single +5V source. Drivers invert and level-shift TTL/CMOS inputs, while receivers accept bipolar RS-232 inputs and re-emit TTL/CMOS logic levels. The MAX232A variant specifies a higher slew rate than the original MAX232, supporting the 200 kbps data rate. Typical applications include industrial PLC serial ports, point-of-sale (POS) terminals, embedded microcontroller UART bridges, legacy PC peripheral interconnects, GPS module interfaces, and battery-backed service equipment. The single +5V supply eliminates the bulky ±12V rails required by older RS-232 designs, simplifying power architecture. When designing with the MAX232ACSE+T, place the four charge-pump capacitors (typically 0.1uF ceramic) as close as possible to the C1+, C1-, C2+, C2-, V+, and V- pins to minimize ripple on the generated RS-232 rails. For applications requiring higher ESD protection or faster data rates, consider the SP3232E or MAX3232 family (3.0V to 5.5V supply). This page synthesizes distributor pricing, drop-in alternatives, application circuit recommendations, and design guidance not consolidated in the manufacturer datasheet.
MAX232CPE - 5V RS-232 Transceiver, 2 Driver/2 Receiver, 16-PDIP
The Maxim Integrated (Analog Devices) MAX232CPE is a +5V-powered, dual-driver/dual-receiver RS-232 transceiver housed in a 16-pin PDIP (PE) through-hole package. It operates from a single 5V supply using on-board charge-pump capacitors to generate the ±10V RS-232 signal levels, eliminating the need for a ±12V power source. The device conforms to the EIA/TIA-232E and V.28/V.24 communication interface standards and supports data rates up to 120 kbps, satisfying asynchronous serial-port requirements for PCs, embedded controllers, and point-of-sale terminals. An RS-232 transceiver is a line driver/receiver IC that converts between transistor-transistor logic (TTL/CMOS) voltage levels used by microcontrollers and the higher-voltage bipolar signaling levels defined by the EIA/TIA-232 standard. As a member of the line-driver/receiver IC class within Interface ICs, the MAX232 family uses external charge-pump capacitors (typically 1 µF to 10 µF) to double and invert the 5V supply, producing the ±10V swing required by RS-232. This topology removes the legacy dependence on ±12V rails that earlier RS-232 implementations required. Key features include two RS-232 drivers with ±9V output swing (typical), two RS-232 receivers with TTL/CMOS compatible outputs, an integrated dual charge pump requiring only four external 1 µF capacitors, low supply current of 8 mA typical, and an operating temperature range of 0°C to +70°C (commercial grade). The MAX232CPE differs from the higher-speed MAX232EPE (which extends to 250 kbps) and the wide-temperature MAX232AEPE (which extends to -40°C and adds 15 kV ESD protection on the driver outputs). The MAX232 family uses a proprietary dual charge-pump architecture that converts +5V into +10V and -10V using only four external capacitors. The drivers meet the EIA/TIA-232E and V.28 specifications with minimum ±5V output swing into 3 kΩ loads, while the receivers accept ±25V inputs and present 5 kΩ input resistance to the line. The MAX232CPE ships in the 16-pin PDIP (PE) through-hole package with pinout identical to the MAX232EPE, MAX232AEPE, SP232ACP-L, and other industry-standard drop-in equivalents. Typical applications include microcontroller UART-to-RS-232 level translation, industrial point-of-sale (POS) terminals, networking equipment console ports, embedded debug and programming interfaces, and legacy serial peripheral interconnects (modems, instrumentation, barcode scanners). The wide input tolerance of the receivers (±25V) tolerates mis-wiring and noisy RS-232 environments. When designing with this device, place the four charge-pump capacitors as close as possible to the IC pins and use 1 µF (or larger) ceramic or tantalum types to maintain ±10V output levels. Verify that the data rate does not exceed 120 kbps, as the MAX232CPE is not designed for higher-speed operation; for that, select the MAX232EPE (250 kbps) or MAX232AEPE (200 kbps) variants. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB layout guidance not collated in the original manufacturer datasheet.
MAX232CPE-C70055 - RS-232 Transceiver | Analog Devices
Analog Devices MAX232CPE-C70055 is a dual RS-232 line-driver and receiver transceiver integrated circuit in a 16-pin PDIP package. The device provides two transmit channels and two receive channels for converting TTL/CMOS logic levels to and from EIA/TIA-232E-compatible signal levels. Its primary role is to bridge a digital controller, computer, or microcontroller UART with a physical RS-232 port, allowing equipment to communicate over a wired serial interface without a separate level-conversion circuit. The MAX232 family belongs to the interface-IC hierarchy: RS-232 transceiver -> line driver and receiver -> logic interface IC -> semiconductor. A MAX232-type device uses an on-chip charge-pump voltage converter to generate the positive and negative voltages required by RS-232 drivers. This allows a circuit powered from a single positive supply to communicate with equipment using RS-232 signal levels. The device is intended for applications where traditional RS-232 communication is required but higher-speed differential or differential alternatives are not appropriate. The C70055 ordering suffix identifies a specific manufacturer-specified configuration associated with the MAX232CPE family. The verified product information identifies the device as a dual-driver, dual-receiver RS-232 interface IC in a 16-pin PDIP package. The standard MAX232CPE family is described as an EIA/TIA-232E and V.28/V.24-compatible interface for systems where positive and negative supply rails are unavailable. Key engineering considerations include the external charge-pump capacitor values, supply bypass, unused-line handling, and the difference between logic-level and RS-232-level signals. Typical uses include industrial control equipment, data acquisition systems, service interfaces, test fixtures, serial adapters, and embedded equipment that needs a conventional RS-232 port. The MAX232 is most appropriate when the system uses a UART with TTL logic and requires a legacy RS-232 connector. It is not the right choice when the design needs galvanic isolation, very high data rates, long unrepeated cable distances, or modern USB-to-serial conversion. A practical design should follow the manufacturer's application circuit, including the specified charge-pump capacitors, local supply decoupling, and controlled handling of unused receiver and driver outputs. PCB placement should keep the charge-pump loop compact and connect the connector-side return path carefully to reduce noise pickup. For a new design, verify the exact C70055 ordering code, electrical limits, and package drawings against the current Analog Devices or Maxim Integrated documentation before releasing the PCB.
MAX232CPE.C70062 5V RS-232 Transceiver | Analog Devices
Analog Devices MAX232CPE.C70062 is a 5 V RS-232 line-driver and receiver transceiver with two driver and two receiver channels, packaged in a 16-pin PDIP. It is designed for EIA/TIA-232E and V.28/V.24 communications interfaces where positive and negative supply voltages around ±12 V are not available. The MAX232 family uses onboard charge-pump circuitry to generate the negative voltage required by the RS-232 receiver threshold. An RS-232 transceiver is an interface IC that translates logic-level signals between a computer or controller and a cable-based serial link. The MAX220–MAX249 family belongs to the RS-232 interface hierarchy, which includes line drivers, line receivers, transceivers, and interface controller devices. This distinction matters because an RS-232 transmitter converts single-ended digital logic into a bipolar differential signal, while its receiver restores the logic-level signal received from the cable. The MAX232CPE.C70062 provides a 16-pin PDIP package, a nominal 5 V supply, and two transmit plus two receive channels. Its principal system benefit is the elimination of separate negative power rails at the transceiver. The integrated charge-pump circuit generates the negative bias needed to interpret RS-232 receive levels, allowing the device to operate from a single positive supply while maintaining compatibility with standard RS-232 equipment. Typical uses include industrial control interfaces, serial service ports, instrumentation, embedded equipment, and legacy peripheral connections. Designers should use the manufacturer pin-description table when assigning connector signals and should account for the non-logic RS-232 voltage levels at the line pins. The communications path also requires suitable board layout, cable selection, grounding, and protection practices to achieve reliable operation in industrial environments. The MAX232CPE.C70062 is the MAX232CPE part number with the C70062 customer ordering suffix. Verify the suffix, package marking, shipping configuration, and documentation revision before releasing a production order. Because this suffix identifies a specific ordering configuration, engineers should treat it as a distinct line item rather than silently substituting the base MAX232CPE designation. This page consolidates interface details, package information, application guidance, and verified drop-in alternatives for MAX232CPE.C70062. It also provides selection criteria for comparing same-footprint transceivers without confusing a functional alternative with a true pin-to-pin replacement. Review the electrical limits and pin descriptions in the manufacturer datasheet before finalizing a circuit. For a new design, confirm availability, lifecycle expectations, and the exact ordering code through the Request a Quote form on this page. For an existing PCB, validate the pinout, supply voltage, channel count, and RS-232 electrical requirements before approving any alternative.
MAX232CSE+ - Dual RS-232 Transceiver, 16-SOIC | Analog Devices
Analog Devices MAX232CSE+ is a dual RS-232 line-driver and receiver IC with one transmitter and one receiver per channel, a 4.5 V to 5.5 V supply range, and a 16-pin SOIC package. It is designed to add bipolar RS-232 signal conditioning to systems whose logic-side supply is 5 V and whose external interface does not provide the positive and negative voltages required by the EIA/TIA-232E standard. An RS-232 transceiver is an interface IC that converts low-voltage logic-level signals into differential, bipolar line signals and converts received line signals back into logic-compatible levels. The MAX232 belongs to the RS-232 interface transceiver category, combining line drivers, line receivers, and an on-chip charge-pump voltage converter in one package. This integration allows a 5 V circuit to communicate with legacy serial equipment without a separate negative-power supply. The device provides two driver channels and two receiver channels, supporting full-duplex serial communication when both directions are used. Its 4.5 V to 5.5 V operating supply supports conventional 5 V digital systems, while the internal charge pump generates the positive and negative voltages required to drive RS-232 loads. The wide-logic compatibility and integrated level translation make the MAX232 suitable for UART-based links, control equipment, and legacy peripheral connections. The MAX220 through MAX249 family is specified for EIA/TIA-232E and V.28/V.24 communications interfaces. This is particularly important where the equipment must interoperate with older RS-232 ports rather than only with modern low-voltage serial standards. The C suffix identifies the capacitor and operating-temperature configuration, while the E suffix denotes the narrow SOIC package and the trailing plus identifies the lead-free ordering code. Typical uses include industrial controller-to-console links, configuration ports on test equipment, service interfaces for printers and scanners, and communication links between 5 V microcontrollers and RS-232 equipment. The two receiver channels can also monitor two incoming lines when only one transmit channel is needed. System designers should account for the charge-pump capacitors, grounding, logic levels, and the slower edge rates associated with the selected RS-232 implementation. Place the charge-pump capacitors and interface-decoupling capacitor close to their associated pins and route driver outputs and receiver inputs away from sensitive clock, reset, and analog signals. Keep the ground and supply return paths short because the receiver must distinguish small logic-side transitions from bipolar RS-232 levels. Confirm signal polarity, baud rate, and flow-control requirements at the software interface before replacing an existing MAX232 implementation. This product page combines the confirmed electrical identity, package information, interface standards, and drop-in alternatives with application-oriented design guidance. It helps engineers identify the correct RS-232 transceiver, verify footprint compatibility, and plan charge-pump capacitance and PCB layout before committing a MAX232CSE+ to a new PCB.
MAX232CSE+T - +5V RS-232 Transceiver, 16-SOIC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX232CSE+T is a +5V-powered, multichannel RS-232 driver/receiver IC in a 16-pin narrow-body SOIC (SOIC-N-16) package. It integrates two RS-232 line drivers and two RS-232 line receivers and generates the required ±7.5V to ±12V RS-232 output levels from a single +5V supply via on-board charge-pump capacitors. The part is supplied in tape-and-reel (T+R) packaging and supports data rates up to 120 kb/s per the MAX232C variant specifications. A RS-232 transceiver (line driver/receiver) is an interface IC that translates logic-level signals (typically 0/5V or 0/3.3V CMOS/TTL) to the higher-voltage bipolar signaling levels defined by the EIA/TIA-232E and V.28/V.24 standards. These standards require driver outputs above ±5V into 3 kΩ loads and receivers that translate bipolar inputs to standard logic levels. The MAX232 sits in the interface IC family within the broader integrated circuits hierarchy: interface IC > transceiver > line driver/receiver > signal conditioning IC > semiconductor. Key features include single +5V operation eliminating the need for ±12V rails, integrated charge-pump voltage doubler/inverter requiring only four external 1 µF capacitors, true RS-232 compliant outputs (typically ±7.5V minimum), and on-board TTL/CMOS-compatible receiver inputs with 5 kΩ resistive pull-down to ground. The wide commercial operating temperature range (0 °C to +70 °C for the C-grade) suits point-of-sale terminals, industrial control consoles, and embedded serial ports. Architecturally, the MAX232 uses a switched-capacitor charge pump (typically a dual-pump Dickson topology) with internal MOSFET switches clocked above the audio band. This generates the negative rail from the +5V supply without inductors, keeping the solution purely capacitive. Receivers employ hysteresis on their inputs to reject noise on long cables. Typical applications include RS-232 serial ports on microcontrollers (Arduino, PIC, STM32), point-of-sale (POS) terminals, industrial control equipment, networking routers and switches with console ports, and legacy PC peripherals. The 16-SOIC narrow-body package and tape-and-reel shipping suit high-volume automated assembly. When designing, place the four charge-pump capacitors as close to the C1+, C1-, C2+, C2- pins as possible using short traces, and use the V+ and V- pins as additional bypass. For higher data rates above 120 kb/s or extended temperature ranges, consider the MAX232E (200 kb/s, -40 °C to +85 °C) or MAX3232 (3V to 5.5V operation) families. This page synthesizes distributor pricing, drop-in cross-brand alternatives such as the Sipex/MaxLinear SP232ACN-L/TR, and practical charge-pump layout guidance not typically consolidated in the manufacturer datasheet.
MAX232CWE+ - 5V Dual RS-232 Transceiver | Analog Devices
The Analog Devices MAX232CWE+ is a +5 V-powered, dual RS-232 driver and receiver interface IC with two transmit channels and two receive channels, supplied in a 16-pin wide SOIC package. The verified distributor listing identifies it as a 2/2 full RS-232 transceiver, while the datasheet describes the MAX220-MAX249 family as line-driver and receiver devices intended for EIA/TIA-232E and V.28/V.24 communications interfaces where ±12 V is unavailable. Its single-supply operation is valuable in battery-powered and modern digital systems that cannot provide conventional bipolar RS-232 rails. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the differential, bipolar signaling used by RS-232 links. The transmitter portion accepts TTL/CMOS-compatible inputs and produces RS-232 output levels, while the receiver portion accepts RS-232 inputs and returns logic-level signals to a host, controller, or peripheral. In the system hierarchy, the MAX232 belongs to interface ICs, serial-interface transceivers, and communication adapters rather than to the power-conversion or digital-processing categories. Key verified features include operation from a 4.5 V to 5.5 V supply, two drivers, two receivers, RS-232 interface compatibility, and a 16-pin wide SOIC package. The MAX232 family is specifically suited to EIA/TIA-232E and V.28/V.24 links and includes on-chip charge-pump support for generating the required RS-232 voltage levels from a single supply. Exact driver slew rate, receiver propagation delay, input and output capacitance, and shutdown-current details were not supplied in the retrieved data and should be confirmed from the manufacturer datasheet before precision timing or signal-integrity design. Typical applications include serial debug consoles, industrial-control equipment, instrumentation, point-of-sale systems, and legacy peripheral interfaces. The device is appropriate where a controller UART needs a compliant RS-232 electrical interface but the board cannot provide ±12 V. Designers should still verify cable length, data rate, grounding, protection requirements, and the logic levels of the connected host. This page combines the verified product identity, package information, interface purpose, distributor records, and cross-reference findings into an engineering-oriented selection summary. A key design consideration is to place the MAX232 close to the board connector and provide the required charge-pump capacitors exactly as specified by the manufacturer datasheet. Keep the RS-232 traces away from sensitive analog and high-speed digital paths, and provide suitable transient protection for exposed external connectors. The verified excerpts do not provide operating temperature, RoHS, REACH, lifecycle, or exact absolute-maximum ratings, so those values remain unconfirmed. This page consolidates verified distributor and cross-reference information, same-package RS-232 design guidance, and explicit engineering trade-offs that are not visible in a basic catalog listing. It is intended to support initial component selection while directing engineers to the official MAX232 datasheet and distributor records for final qualification.
MAX232D - 5V Dual RS-232 Transceiver, 120kbps, SOIC-16 | TI
The Texas Instruments MAX232D is a 5V-powered, dual-driver / dual-receiver RS-232 transceiver that integrates an on-board capacitive charge-pump to generate the +/-9V TIA/EIA-232-F signaling voltages from a single 5V supply, delivered in a 16-pin SOIC (D) package. It supports data rates up to 120 kbps, accepts +/-30V input levels on the receiver inputs, and supplies 8 mA typical quiescent current from a 4.5V to 5.5V supply rail. The device is functionally designed to be interchangeable with the industry-standard Maxim MAX232 die. A dual EIA-232 (RS-232) line driver/receiver is an interface IC that bridges TTL/CMOS logic levels (0-5V) and the much higher bipolar voltage swings (+/-5V to +/-15V) required by legacy serial-port standards. By generating these higher rails internally from a single low-voltage supply, dual RS-232 transceivers eliminate the need for a separate negative or high-voltage power rail, simplifying board design and reducing BOM cost. In the broader product hierarchy, the MAX232D belongs to the EIA-232 transceiver family (RS-232 transceiver), then to the Interface ICs category, then to Integrated Circuits, ultimately serving as an enabler of UART-to-DB9 connectivity in microcontroller- and FPGA-based systems. Key features of the MAX232D include TIA/EIA-232-F and ITU V.28 compliance, +/-30V receiver input tolerance that survives mis-wired cables and transients, an integrated 5V-to-+/-10V charge pump with four external 1 uF capacitors (charge-pump flying capacitors), two drivers and two receivers in a single 16-pin SOIC package, and ESD protection on the RS-232 bus pins (per the family spec). The 120 kbps data rate is more than adequate for serial console, modem, and industrial telemetry traffic, while the wide 4.5V to 5.5V supply range accommodates standard 5V regulated rails and battery-powered designs with headroom. Architecturally, the charge pump uses a voltage-doubler plus an inverting charge pump clocked from an internal oscillator (typically 125 kHz to 250 kHz range), which provides the +10V and -10V rails that drive the RS-232 output stages. The receivers use Schmitt-trigger inputs with hysteresis for noise immunity on long cables. Compared to using a discrete transistor-based level shifter or a +-12V linear supply, the MAX232D solution occupies roughly 30 mm x 6 mm of board area and removes one power supply from the design. Typical applications include microcontroller UART-to-RS-232 conversion on serial ports of industrial PLCs, point-of-sale (POS) terminals, embedded debug consoles for firmware development, and legacy PC RS-232 COM ports. The MAX232D is also commonly deployed in factory automation where 5V microcontrollers need to drive RS-232-controlled motor drives or sensors. Other uses include test and measurement equipment (scopes and analyzers with serial ports), legacy networking gear with DB-9 management ports, and education/development boards (Arduino shield, FPGA dev kit UART bridges). When designing with the MAX232D, observe charge-pump capacitor polarity: TI recommends 1 uF (or larger) low-ESR ceramic capacitors on each of the four charge-pump pins (C1+, C1-, C2+, C2-, V+, V-). Place the capacitors as close to the IC as possible to minimize parasitic resistance and ringing. Avoid long cable stubs on T1OUT/T2OUT pins, and add TVS diodes for additional ESD protection if the application involves frequent cable mating/unmating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX232DE4 - Dual RS-232 Transceiver, 5V, 16-SOIC | Texas Instruments
The Texas Instruments MAX232DE4 is a dual RS-232 driver and receiver transceiver with two drivers, two receivers, a single 4.5 V to 5.5 V supply, and a 16-pin SOIC package. It supports data rates up to 120 kbit/s and includes on-chip charge-pump capacitors for generating the bipolar RS-232 voltage levels. The device is designed for bidirectional serial data links between TTL/CMOS logic and EIA/TIA-232 equipment. An RS-232 transceiver is an interface IC that translates low-voltage digital logic levels into RS-232 levels and converts incoming RS-232 signals back into TTL/CMOS levels. The MAX232 belongs to the interface IC hierarchy, where a transceiver integrates driver, receiver, and voltage-generation functions. It is commonly used in industrial control, data acquisition, embedded instrumentation, and legacy computer equipment. The verified product information identifies the MAX232DE4 as a 2/2 full RS-232 transceiver in a 16-SOIC package. It operates from a single 4.5 V to 5.5 V supply and supports an operating temperature range of 0 C to 70 C. Additional verified features include operation to 120 kbit/s, low supply current, and ESD protection exceeding 2000 V under the cited JESD test condition. The charge-pump circuit allows the device to generate positive and negative RS-232 levels from one low-voltage supply, avoiding a separate negative power rail. The dual-driver and dual-receiver organization supports two serial channels or a full-duplex link on one device. The receiver converts remote RS-232 signals into logic levels suitable for digital controllers, while the driver boosts local logic signals to RS-232 voltage levels. Typical uses include RS-232 links in test equipment, serial adapters, industrial controllers, point-of-sale systems, and embedded measurement products. The 16-SOIC package supports conventional surface-mount PCB assembly. The verified commercial result lists the part with DigiKey, Mouser, Octopart, and other distributors, but the supplied data does not provide a current unit price or confirmed lead time. For robust implementation, follow the manufacturer datasheet for capacitor selection, pin orientation, and signal-routing requirements. The MAX232DE4 is not a power semiconductor, so SOA data is not applicable. The product should be selected only where the 0 C to 70 C temperature range and the verified electrical limits match the target system requirements. This page combines verified distributor and manufacturer-linked data with application guidance, design considerations, and a package-focused product summary for engineers evaluating RS-232 interface implementations.
MAX232DG4 - 2/2 RS-232 Transceiver 120kbps | Texas Instruments
The Texas Instruments MAX232DG4 is a 2/2 full-duplex RS-232 transceiver rated for data rates up to 120 kbit/s, operating from a 4.5 V to 5.5 V single supply in a 16-pin SOIC package. It provides two EIA-232 drivers, two receivers, on-chip charge-pump capacitors, and receiver input protection to ±30 V. An RS-232 transceiver is an interface IC that converts between single-ended digital logic levels and balanced, bipolar EIA-232 signal levels. This level-shifting function belongs to the interface-IC hierarchy and is essential when connecting a 5 V microcontroller, processor, or data terminal to an RS-232 port whose logic levels use positive and negative voltages. Key features include operation from one 4.5 V to 5.5 V supply, integrated 1.0 µF charge-pump capacitors, support for data rates to 120 kbit/s, ±30 V receiver input levels, and low typical supply current of 8 mA. Two driver and two receiver channels allow two communication links or hardware flow-control signals to be implemented in one package. The device is intended for industrial and commercial systems operating from 0°C to 70°C. Technically, the charge-pump circuitry generates the negative voltage required by an RS-232 transmitter from the positive supply. Receivers translate bipolar line voltages into CMOS-compatible logic levels, while the specified ±30 V input tolerance helps manage transient exposure on externally routed cables. Because this is a legacy interface rather than a modern differential bus, grounding, cable routing, and protection remain important system-level concerns. Typical uses include service and test equipment, industrial controllers, point-of-sale equipment, data acquisition systems, and embedded serial-port adapters. The MAX232DG4 is most appropriate where two RS-232 channels are useful and a 5 V supply is available. It is not suitable for voltage-mode RS-485 or RS-422 networks, and its 120 kbit/s maximum data rate is adequate for legacy serial ports rather than high-speed physical-layer protocols. The principal design consideration is charge-pump capacitor placement. The integrated capacitors still require correct bypassing and routing around the device, while protected RS-232 lines should be kept away from clocks and sensitive analog signals. Confirm line direction, connector polarity, and the target baud rate before layout because the package contains both transmitters and receivers. This page consolidates distributor data, cross-reference information, and practical RS-232 design guidance. The MAX232DG4 provides a practical solution for two-channel RS-232 conversion in a compact 16-SOIC. Its integrated charge pump removes the need for external voltage-generation components, while 120 kbit/s operation and ±30 V receiver tolerance make it suitable for established EIA-232 equipment. Designers should still account for cable transients, grounding, baud-rate margin, and connector signal mapping. For systems requiring galvanic isolation, modern differential buses, or operation beyond 120 kbit/s, a different interface architecture is required.
MAX232DR - 5V Dual RS-232 Transceiver, 120kbps, SOIC-16 | TI (Tape & Reel)
The Texas Instruments MAX232DR is a 5V-powered, dual-driver / dual-receiver RS-232 transceiver that integrates an on-board capacitive charge-pump to generate the +/-9V TIA/EIA-232-F signaling voltages from a single 5V supply, delivered in a 16-pin SOIC (D) package. It supports data rates up to 120 kbps, accepts +/-30V input levels on the receiver inputs, and supplies 8 mA typical quiescent current from a 4.5V to 5.5V supply rail. The device is functionally designed to be interchangeable with the industry-standard Maxim MAX232 die. A dual EIA-232 (RS-232) line driver/receiver is an interface IC that bridges TTL/CMOS logic levels (0-5V) and the much higher bipolar voltage swings (+/-5V to +/-15V) required by legacy serial-port standards. By generating these higher rails internally from a single low-voltage supply, dual RS-232 transceivers eliminate the need for a separate negative or high-voltage power rail, simplifying board design and reducing BOM cost. In the broader product hierarchy, the MAX232DR belongs to the EIA-232 transceiver family (RS-232 transceiver), then to the Interface ICs category, then to Integrated Circuits, ultimately serving as an enabler of UART-to-DB9 connectivity in microcontroller- and FPGA-based systems. Key features of the MAX232DR include TIA/EIA-232-F and ITU V.28 compliance, +/-30V receiver input tolerance that survives mis-wired cables and transients, an integrated 5V-to-+/-10V charge pump with four external 1 uF capacitors (charge-pump flying capacitors), two drivers and two receivers in a single 16-pin SOIC package, and ESD protection on the RS-232 bus pins (per the family spec). The 120 kbps data rate is more than adequate for serial console, modem, and industrial telemetry traffic, while the wide 4.5V to 5.5V supply range accommodates standard 5V regulated rails and battery-powered designs with headroom. Architecturally, the charge pump uses a voltage-doubler plus an inverting charge pump clocked from an internal oscillator (typically 125 kHz to 250 kHz range), which provides the +10V and -10V rails that drive the RS-232 output stages. The receivers use Schmitt-trigger inputs with hysteresis for noise immunity on long cables. Compared to using a discrete transistor-based level shifter or a +-12V linear supply, the MAX232DR solution occupies roughly 30 mm x 6 mm of board area and removes one power supply from the design. Typical applications include microcontroller UART-to-RS-232 conversion on serial ports of industrial PLCs, point-of-sale (POS) terminals, embedded debug consoles for firmware development, and legacy PC RS-232 COM ports. The MAX232DR is also commonly deployed in factory automation where 5V microcontrollers need to drive RS-232-controlled motor drives or sensors. Other uses include test and measurement equipment (scopes and analyzers with serial ports), legacy networking gear with DB-9 management ports, and education/development boards (Arduino shield, FPGA dev kit UART bridges). When designing with the MAX232DR, observe charge-pump capacitor polarity: TI recommends 1 uF (or larger) low-ESR ceramic capacitors on each of the four charge-pump pins (C1+, C1-, C2+, C2-, V+, V-). Place the capacitors as close to the IC as possible to minimize parasitic resistance and ringing. Avoid long cable stubs on T1OUT/T2OUT pins, and add TVS diodes for additional ESD protection if the application involves frequent cable mating/unmating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX232DRE4 - Dual RS-232 Transceiver, 120 kbit/s | TI
Texas Instruments MAX232DRE4 is a dual RS-232 driver/receiver transceiver with two drivers and two receivers, a 4.5 V to 5.5 V single-supply range, and data rates up to 120 kbit/s. It is packaged in a 16-pin SOIC for industrial-control, instrumentation, and legacy serial-interface equipment. An RS-232 transceiver is an interface IC that converts low-voltage TTL or CMOS logic signals into balanced RS-232 voltage levels and converts incoming RS-232 signals back into logic levels. Within the interface hierarchy, the MAX232 belongs to the RS-232 transceiver family, providing physical-layer conversion for UART, serial-port, and point-to-point communication systems. It simplifies the interface by generating the positive and negative RS-232 voltages from one 5 V supply. The MAX232DRE4 supports operation from 4.5 V to 5.5 V, data rates up to 120 kbit/s, and receiver input levels as high as ±30 V. Its typical supply current is 8 mA, while 500 mV receiver hysteresis improves noise immunity at the logic threshold. The commercial-temperature version operates from 0°C to 70°C and is available in a 16-SOIC package. The device uses charge-pump capacitors to produce the bipolar voltage swings required by RS-232. Its two driver channels translate TTL outputs into RS-232 levels, while its two receiver channels perform the inverse conversion. This architecture suits point-to-point links where full-duplex communication and deterministic logic-level interfacing are required without adding a separate external power-supply circuit. Typical uses include RS-232 ports on industrial controllers, laboratory instruments, barcode readers, data-acquisition equipment, service interfaces, and embedded systems that retain a legacy serial connector. The 120 kbit/s maximum rate provides ample margin for configuration consoles, control commands, firmware downloads, and low-to-moderate-rate telemetry. PCB design should prioritize short connections between the charge-pump capacitors, supply pins, and device ground. Place the required 1.0 µF capacitors close to their associated pins, use a solid ground plane, and keep the RS-232 connector interface area physically separated from sensitive analog circuitry to reduce ESD and surge-related coupling. This page combines electrical specifications, package and application guidance, practical layout considerations, and a structured comparison with verified same-family and cross-brand alternatives. It is intended to help engineers evaluate MAX232DRE4 for a new RS-232 design or determine whether an existing 16-SOIC board can be supported by a pin-compatible replacement.
MAX232DRG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232DRG4 is a 5 V dual RS-232 transceiver IC with two drivers and two receivers, a maximum signaling rate of 120 kbps, and a 16-pin SOIC package. It generates the bipolar RS-232 voltage levels required by EIA/TIA-232 equipment from a single 5 V supply. A RS-232 transceiver is an interface IC that converts between digital logic levels and the bipolar voltage signaling used by serial-port equipment. The MAX232 belongs to the broader line-driver and line-receiver hierarchy, where the driver translates TTL or CMOS logic into RS-232 levels and the receiver converts transmitted RS-232 levels back into logic-compatible signals. This makes it a practical interface between a modern microcontroller UART and legacy RS-232 equipment. The MAX232 provides two transmit channels and two receive channels, allowing one RS-232 port to support full-duplex communication. Its stated maximum data rate is 120 kbps, while its 4.5 V to 5.5 V single-supply operating range supports conventional 5 V digital systems. According to the Texas Instruments product page, the device supports output voltages of positive and negative 9 V and includes positive and negative 2 kV ESD protection on the RS-232 pins. Internal charge-pump circuitry generates the positive and negative voltages required by RS-232 from the 5 V supply, eliminating the need for a separate positive and negative supply in many designs. The drivers and receivers are designed to interface UART controllers with external data-terminal equipment while maintaining logic-compatible digital-side signaling. Its dual-channel arrangement makes it suitable for point-to-point links, equipment control, configuration interfaces, and service ports. Typical uses include industrial controller serial ports, data acquisition systems, test equipment, maintenance interfaces, and communications links between a microcontroller and an RS-232 peripheral. The 120 kbps rate is appropriate for legacy serial protocols rather than high-speed differential buses such as RS-485. Cable length, capacitance, grounding, and signal integrity should be evaluated when designing longer interconnects. For a new layout, route the RS-232 driver outputs and receiver inputs directly to the connector while maintaining the separation recommended for exposed interfaces. Place charge-pump capacitors and interface bypass capacitors close to the device, follow the manufacturer pin description when assigning connector signals, and confirm supply tolerances, grounding, and ESD requirements before releasing the PCB. This page combines manufacturer product information, explicit distributor specifications, package-aware alternatives, and practical interface-design guidance to support component selection, schematic review, PCB implementation, and sourcing decisions for the MAX232DRG4.
MAX232DW - 120kbps Dual RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232DW is a dual RS-232 driver and receiver with two drivers, two receivers, a 120 kbit/s data rate, and a 16-pin SOIC package. It operates from a single 5 V supply and uses an on-chip capacitive voltage generator to produce the bipolar voltage levels required by TIA/EIA-232-F interfaces. Its approximately ±9 V driver output and ±2 kV ESD protection make it a standard choice for converting between 5 V TTL/CMOS logic and RS-232 signal levels. An RS-232 transceiver is an interface IC that bridges a digital logic system and a serial communications port using the voltage-defined RS-232 standard. The MAX232 belongs to the RS-232 transceiver hierarchy, where a line driver converts TTL/CMOS inputs into bipolar RS-232 outputs and a line receiver converts bipolar inputs into TTL/CMOS levels. This allows equipment with a 5 V UART or microprocessor interface to communicate with legacy RS-232 ports without implementing discrete level-shifting networks. Key features include two transmit channels, two receive channels, operation to 120 kbit/s, a typical 8 mA supply current, receiver input capability of ±30 V, and compatibility with TIA/EIA-232-F and ITU Recommendation V.28. The receiver has a typical transition threshold of 1.3 V and typical hysteresis of 0.5 V. These characteristics provide noise margin and stable interpretation of the bipolar RS-232 signal while retaining the familiar ±9 V driver levels. The device combines four RS-232 signal-conditioning channels with an on-chip charge-pump voltage generator. Charge-pump capacitors connected to the designated voltage-generator pins create the positive and negative supply levels needed by the drivers. This architecture eliminates the negative power supply otherwise required by many discrete RS-232 implementations, while the receiver side provides the electrical translation needed to protect and interface a 5 V logic device. Typical uses include industrial serial consoles, point-of-sale equipment, data-acquisition systems, test and measurement instruments, service interfaces, and legacy peripheral connections. A microcontroller can connect its UART TX and RX signals to the appropriate driver and receiver channels, while the external RS-232 connector receives the bipolar line outputs. The 120 kbit/s capability covers many legacy control and communications protocols without requiring a high-speed RS-485 interface. The principal design consideration is the charge-pump capacitor network and RS-232 connector routing. Capacitors must be connected exactly as required by the manufacturer datasheet, and external line protection should be evaluated for the target cable length and environment. Logic levels and signal polarity must also be checked at each UART channel because the MAX232 provides level conversion, not automatic inversion or protocol handling. This product page consolidates the verified manufacturer specifications, distributor availability, cross-reference information, and engineering guidance for MAX232DW. It also distinguishes a genuine same-package replacement from devices with different charge-pump capacitor requirements or package dimensions, helping engineers avoid substitutions that require PCB or component changes.
MAX232DWG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232DWG4 is a dual-channel RS-232 transceiver with two drivers and two receivers, operating from a single 5 V supply at up to 120 kbps in a 16-pin SOIC package. Its integrated charge-pump circuit generates the positive and negative voltages required by RS-232, while the driver outputs swing to approximately ±9 V. An RS-232 transceiver is an interface IC that converts logic-level signals between a host controller and a RS-232 port. It belongs to the hierarchy of interface ICs, communication transceivers, line-interface ICs, and semiconductor signal-conditioning devices. This bidirectional level translation allows equipment using 0 V to 5 V logic to communicate with legacy computers, industrial controllers, test equipment, and other peripherals that use voltage-based RS-232 signaling. The MAX232DWG4 combines four interface functions in one package: two transmit drivers and two receive channels. It supports data rates through 120 kbps, accepts input levels as high as ±30 V, and provides ±2 kV electrostatic-discharge protection. Typical supply current is 8 mA, making it practical for battery-operated instruments, portable test equipment, and embedded control systems where continuous power consumption must remain low. Its internal charge pump uses four external 1.0 µF capacitors to produce the required positive rail and negative rail. The circuit simplifies implementation because the system does not need a separate ±12 V supply. Communication is half-duplex on each channel because a driver and receiver can share the same signal pair, while direction must be controlled by the host if both sides transmit on the same line. Typical uses include serial service ports, industrial configuration interfaces, point-of-sale equipment, modems, embedded instrumentation, and legacy controller connectivity. The MAX232DWG4 is especially useful when the logic side operates at 5 V and the cable side must comply with RS-232 voltage levels. A protected connector and properly routed ground connection remain important because ESD protection does not eliminate the need for good system-level surge protection. During layout, place the four charge-pump capacitors close to their associated pins and provide the decoupling and ground-plane continuity required by the manufacturer datasheet. Keep the logic-side and cable-side routes separated to minimize noise injection. Confirm line-receiver thresholds, driver slew behavior, and cable length against the intended communication standard before releasing a production design. This page combines the MAX232DWG4 specifications, pin assignments, drop-in comparison choices, and practical interface-design guidance. It also highlights charge-pump layout, ESD considerations, application fit, and the distinction between pin-compatible variants so engineers can evaluate replacements without changing the PCB footprint.