Interface ICs
Subcategories
Products (3,400+)
MAX232DWR - Dual RS-232 Transceiver 120kbps | TI
Texas Instruments MAX232DWR is a dual RS-232 line driver and receiver with one 5 V supply, 120 kbit/s operation, ±9 V driver outputs, and ±2 kV ESD protection in a 16-pin SOIC package. The integrated capacitive voltage generator produces the bipolar voltages required by TIA/EIA-232-F and ITU V.28 interfaces, while the two receivers translate bipolar RS-232 signals into TTL/CMOS levels. An RS-232 transceiver is an interface IC that connects low-voltage digital logic to the voltage-tolerant, unbalanced serial signaling defined by EIA/TIA-232. Within the product hierarchy, the MAX232 is a dual driver/receiver, an RS-232 interface transceiver, and ultimately a semiconductor for serial communications and embedded data exchange. This category is especially useful when equipment needs a compact way to bridge a TTL/CMOS UART and an RS-232 port using only a single 5 V rail. Key features include two transmit channels, two receive channels, a maximum data rate of 120 kbit/s, and receiver input capability of ±30 V. Each receiver uses a typical input threshold of 1.3 V with 0.5 V of hysteresis. The MAX232 operates from a single 5 V supply, has a typical supply current of 8 mA, and provides ±9 V RS-232 output levels with ±2 kV ESD protection as stated on the Texas Instruments product page. Technically, the capacitive voltage generator converts the 5 V supply into the positive and negative voltages used by the drivers. The drivers add signal conditioning to create TIA/EIA-232-F output levels, while the receivers convert incoming bipolar signals into logic-compatible levels. This integrated charge-pump approach avoids a separate negative supply rail, but the required charge-pump capacitors and their placement remain important to reliable operation. Typical applications include industrial serial consoles, data acquisition equipment, legacy peripheral adapters, point-of-sale systems, and laboratory instrumentation. The 120 kbit/s rate supports conventional serial links while the ±30 V receiver tolerance helps protect logic-side systems when RS-232 cable noise or ground offsets exceed normal logic levels. The device is especially appropriate where a legacy RS-232 interface must coexist with a modern 5 V UART controller. Designers should follow the manufacturer datasheet for charge-pump capacitor values, receiver input handling, unused-pin configuration, and layout recommendations. Keep the charge-pump loop compact, provide the specified bypass and flyback capacitance, and verify the connected UART voltage levels and grounding before treating the interface as RS-232 compliant. This product page combines verified manufacturer specifications, distributor availability references, same-package replacement analysis, and practical interface-design guidance. It is intended to help engineers confirm electrical compatibility, identify genuine pin-compatible alternatives, and implement a dependable 5 V-to-RS-232 signal path without relying on packaging-only substitutions.
MAX232ECD - 5V Dual RS-232 Driver/Receiver | Texas Instruments
The Texas Instruments MAX232ECD is a dual RS-232 driver/receiver IC that operates from a single 5V supply and includes integrated IEC61000-4-2 ESD protection on the RS-232 lines. Housed in a 16-pin SOIC (D) package, the device integrates a capacitive voltage-doubler/inverter charge pump that generates the ±10V RS-232 voltage levels from a single 5V rail using four external 1.0 µF capacitors, eliminating the need for a dual-polarity supply. Each part contains two line drivers and two line receivers, supporting full-duplex RS-232 communication at data rates up to 120 kbit/s with ±30V input tolerance on receiver inputs. An RS-232 line driver/receiver (also called a transceiver) is a type of interface IC that bridges the voltage gap between TTL/CMOS logic (0V-5V) and the TIA/EIA-232-F standard (±5V to ±15V swing). It belongs to the broader hierarchy of line drivers -> interface ICs -> integrated circuits -> semiconductors. The MAX232 family is the de-facto industry-standard solution for asynchronous serial-port level translation and is found in nearly every embedded design that needs RS-232 connectivity. Key features include integrated IEC61000-4-2 ESD protection (typically ±15kV air-gap, ±8kV contact discharge on the RS-232 pins), low supply current of typically 8 mA with no load, and 1.0 µF charge-pump capacitors (versus the original MAX232 which used 1.0 µF; the MAX232E and MAX232EC variants retain the same capacitor requirement). The 'C' suffix indicates the commercial 0°C to +70°C operating temperature range. The wide ±30V receiver input range tolerates mis-wired or shorted RS-232 cables without permanent damage. The MAX232ECD uses a charge-pump architecture based on a switched-capacitor voltage doubler and voltage inverter. An internal oscillator (typically 125 kHz) drives the charge pump; the doubled +10V (V+) and inverted -10V (V-) rails feed the driver output stage, while the receiver section operates from the single 5V supply with internal 5 kΩ pull-down resistors. This architecture eliminates the bulky ±12V supplies historically required for RS-232 interfaces. Typical applications include industrial PLC serial ports, point-of-sale (POS) terminals, embedded microcontroller debug consoles, legacy PC COM-port replacements via USB-to-serial bridges, and any design requiring TIA/EIA-232-F compliance. The integrated IEC61000-4-2 ESD protection makes the MAX232ECD especially suitable for cables exposed to user contact or industrial ESD events. When designing with this device, place the four charge-pump capacitors (typically 1.0 µF ceramic) as close to the C1+, C1-, C2+, C2- pins as possible. Although the integrated ESD protection is robust, external TVS diodes are still recommended for the most demanding industrial environments. The MAX232ECD is pin-compatible with the industry-standard MAX232 and may be used as a drop-in upgrade in most existing designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - including a parametric comparison versus the MAX3232E, ADM232, and HIN232 families and verified IEC61000-4-2 ESD ratings not always quoted in the datasheet's electrical characteristics table.
MAX232ECDR - Dual RS-232 Driver/Receiver, ESD-Protected | TI
The Texas Instruments MAX232ECDR is a dual RS-232 driver/receiver with integrated IEC 61000-4-2 ESD protection, packaged in a 16-pin SOIC. It operates from a single 5 V supply using 1.0 µF charge-pump capacitors, supplies 2 drivers and 2 receivers, supports data rates to 120 kbit/s, and tolerates ±30 V input levels. The 'E' suffix denotes the enhanced ESD-protected version (HBM ±15 kV, IEC 61000-4-2 contact/air ±8 kV/±15 kV). What is an RS-232 transceiver? An RS-232 transceiver is a type of serial interface IC that translates logic-level (0 V/5 V or 0 V/3.3 V) signals on the TTL/CMOS side to bipolar RS-232 voltage levels (typically ±5 V to ±15 V) required by the TIA/EIA-232-F standard. RS-232 transceivers sit inside the interface ICs family, between UART/SCI controllers and external DB9/DB25 connectors, enabling legacy PC and industrial serial communication. The MAX232 family historically integrated charge-pump doublers/inverters to generate ±10 V from a single +5 V rail, eliminating the need for a dual supply. Key features of the MAX232ECDR include on-chip ±10 V generation from a single 5 V supply via four external 1.0 µF charge-pump capacitors, ±30 V receiver input tolerance that exceeds the TIA/RS-232-F specification, low supply current (typically 8 mA), and TTL/CMOS-compatible logic I/O. The integrated IEC 61000-4-2 ESD protection on the RS-232 lines eliminates external TVS arrays in most designs, reducing BOM cost and PCB area. The device operates across the commercial 0 °C to 70 °C temperature range. The MAX232ECDR uses a CMOS charge-pump voltage doubler/inverter architecture: an internal oscillator drives an external capacitor network that produces V+ (≈ +10 V) and V− (≈ −10 V) rails from the +5 V supply. Drivers translate TTL inputs to RS-232 levels (5 V → +10 V for a mark, 0 V → −10 V for a space); receivers invert and level-shift incoming RS-232 signals back to TTL. The 120 kbit/s data rate supports standard serial links including legacy modems, point-of-sale terminals, and industrial PLC links. Typical applications include factory automation PLCs and industrial control RS-232 ports, point-of-sale (POS) terminals, legacy PC COM ports and peripherals (mice, barcode scanners), embedded microcontroller UART bridges, and instrumentation serial links. The integrated ESD protection makes it especially suitable for handheld and field-exposed equipment where IEC 61000-4-2 air-discharge events are routine. When designing with this part, place the four 1.0 µF charge-pump capacitors as close as possible to the C1+, C1−, C2+, C2− pins to minimize ripple and EMI. Note that VCC must rise monotonically and quickly to ensure proper charge-pump startup; an RC delay on VCC is not recommended. Receiver inputs tolerate ±30 V even when VCC = 0 V (true fail-safe), simplifying hot-plug and powered-down interfaces. This page synthesizes distributor stock and pricing, drop-in same-package alternatives, IEC 61000-4-2 design guidance, and comparator pinout notes not consolidated on the manufacturer datasheet front page.
MAX232ECPE+ - 120kbps 5V RS-232 Transceiver | Analog Devices
The Analog Devices MAX232ECPE+ is a dual RS-232 transceiver with one driver and one receiver per channel, operates from a single 4.5V to 5.5V supply, supports data rates through 120kbps, and is packaged in a 16-pin PDIP. Designed for EIA/TIA-232E and CCITT V.28 links, it provides the electrical conversion required between TTL/CMOS logic and balanced RS-232 signals. The integrated charge-pump circuitry generates the required RS-232 voltage levels without a separate negative power supply. An RS-232 transceiver is an interface IC that bridges a digital logic system and a serial communications port. RS-232 uses single-ended, bipolar signaling in which logic levels are represented by positive and negative voltages relative to ground. Within the electronics hierarchy, the MAX232ECPE+ is an interface IC, an RS-232 transceiver, a line driver and receiver pair, and ultimately a semiconductor communication component. It is commonly placed between a UART, microprocessor, controller, or service connector and an external RS-232 port. Key verified features include two transmit channels and two receive channels, operation from one 4.5V to 5.5V supply, and support for data rates up to 120kbps. Distributor and manufacturer-family sources identify the MAX232E line as meeting EIA/TIA-232E and CCITT V.28 requirements when loaded. The device also offers 15kV ESD protection according to distributor descriptions, improving interface robustness against electrostatic discharge encountered during cable connection or industrial use. The MAX232ECPE+ uses integrated charge-pump circuitry to generate the positive and negative voltage levels needed by RS-232 drivers from the single low-voltage supply. Receivers convert the incoming bipolar RS-232 signal into a digital level compatible with the connected logic system. Exact pin names, electrical limits, propagation timing, and capacitor values should be confirmed in the manufacturer data sheet before layout because those details were not included in the supplied verified excerpts. Typical applications include legacy RS-232 service consoles, instrumentation, point-of-sale equipment, industrial controllers, and adapter boards that connect TTL/CMOS UART devices to DB9 or other RS-232 connectors. The 120kbps capability is suitable for moderate-speed serial links, while the 5V supply simplifies integration with established digital systems. For new designs, the MAX233 family may be attractive when eliminating external charge-pump capacitors is more important than retaining the MAX232E footprint and feature set. When designing the interface, connect the charge-pump capacitors and supply bypassing capacitors exactly as specified by the manufacturer. Keep the RS-232 connector-side nets away from sensitive analog and high-speed digital traces, and provide the connector ground as a short, robust return path. ESD protection helps, but it does not replace correct signal routing, chassis grounding, or system-level surge protection. This page combines verified manufacturer and distributor references, cross-reference results, packaging information, application guidance, and design cautions to support faster component selection. It deliberately distinguishes verified electrical facts from values that require confirmation from the complete data sheet, helping engineers avoid treating incomplete search snippets as a substitute for the manufacturer specification.
MAX232EID - 120kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232EID is a dual RS-232 line driver and receiver with a single 5 V supply, data rates up to 120 kbit/s, and enhanced electrostatic-discharge protection. It is housed in a 16-pin SOIC package and provides two transmit channels and two receive channels for bidirectional serial interfaces. An RS-232 transceiver is an interface IC that translates logic-level signals between a host or controller and a noisy, long-distance serial link. The MAX232EID uses a capacitive voltage generator to produce the positive and negative voltages required by TIA/EIA-232-F and ITU V.28 interfaces. This places it within the RS-232 transceiver, interface IC, and broader semiconductor hierarchy. Key features include operation from one 5 V supply, support for 1.0 µF charge-pump capacitors, a maximum data rate of 120 kbit/s, and receiver input levels extending to ±30 V. According to the Texas Instruments MAX232E product information, all RS-232 pins provide 15 kV human-body-model protection, 15 kV IEC61000-4-2 air-gap discharge protection, and 8 kV IEC61000-4-2 contact-discharge protection. The MAX232EID combines two drivers and two receivers with the internal charge-pump circuitry required to generate bipolar RS-232 voltage levels from a 5 V supply. Its receivers convert incoming RS-232 signals to 5 V TTL or CMOS levels, while its drivers convert TTL or CMOS logic into TIA/EIA-232-F-compatible output levels. This integration simplifies legacy serial-port and industrial-control designs. Typical applications include RS-232 ports on embedded systems, industrial controllers, test equipment, data-acquisition systems, and legacy computer peripherals. The 120 kbit/s operating rate supports many point-to-point serial links, while the enhanced ESD ratings are useful where a cable or connector can expose the interface to electrostatic discharge. Use the pin-description and typical-application information in the manufacturer datasheet when assigning connector and protection components. Confirm the external charge-pump capacitor values, supply decoupling, logic-level compatibility, and connector-side protection against the operating environment before releasing a PCB layout. This page combines the manufacturer specifications with practical interface guidance, package details, and verified drop-in comparison information. It helps engineers assess the MAX232EID for legacy RS-232 connectivity, identify compatible alternatives, and plan ESD-aware PCB implementation without changing the core transceiver architecture.
MAX232EIN - 5V RS-232 Transceiver | Texas Instruments | DIP-16
The Texas Instruments MAX232EIN is a dual RS-232 driver and dual receiver interface IC with a 4.5 V to 5.5 V single supply, 250 kbps data rate, and IEC 61000-4-2 protection, housed in a 16-pin PDIP package. It provides two transmit channels and two receive channels for converting TTL/CMOS logic levels to RS-232 voltage levels and back again. A transceiver combines the functions of an RS-232 line driver and line receiver in one integrated circuit. In the broader semiconductor hierarchy, the MAX232EIN belongs to the interface IC class, where communication between systems with different voltage levels is handled by level-shifting and signal-conditioning devices. Its integrated charge-pump voltage generator allows the device to produce the positive and negative RS-232 voltages required by the standard from a single 5 V supply. The MAX232EIN is designed for 250 kbps data rates and uses on-chip protection against electrostatic discharge. Its integrated protection is identified in the product description as IEC 61000-4-2 protection, making it useful for industrial equipment, communications equipment, and other systems where an RS-232 connector may be exposed to user-contact transients. The 16-pin PDIP package is suitable for through-hole PCB layouts and hand-assembled prototypes. The device is used when a controller, terminal, printer, instrument, or another embedded system must communicate through an RS-232 port. Each receiver converts an RS-232 input to a logic-compatible signal, while each driver converts a logic input into an RS-232 output. The internal charge-pump circuit supplies the bipolar voltage levels required by the RS-232 interface without a separate negative power supply. For robust board implementation, place the charge-pump capacitors close to their associated pins and route the transmit and receive traces away from sensitive analog or high-speed digital signals. Decoupling capacitors should be located near the supply pins, and the external connector should include the required RS-232 signal-ground reference. The MAX232EIN is most appropriate when a single 5 V supply, a compact dual-channel interface, and a legacy RS-232 connection are required. This page combines the manufacturer device description with package information, drop-in comparison options, application guidance, and design notes for engineers selecting or replacing the MAX232EIN. The listed alternatives are limited to verified same-package choices; no cross-package RS-232 devices are presented as drop-in replacements.
MAX232EPE+ - +5V RS-232 Transceiver, 2/2, 16-PDIP | Maxim Integrated
The Maxim Integrated MAX232EPE+ is a +5V-powered, multichannel RS-232 line driver/receiver from the MAX220-MAX249 family, providing 2 drivers and 2 receivers (2/2) in a 16-pin PDIP through-hole package. It operates from a single 4.5V to 5.5V supply and generates the required RS-232 ±10V output levels internally using an integrated charge-pump with four external 1µF capacitors — eliminating the need for a ±12V power rail. Typical data rate is 120 kbps, and the device is qualified for the extended industrial -40°C to +85°C operating temperature range. What is an RS-232 transceiver? An RS-232 transceiver is a type of interface IC that translates logic-level signals (0/3.3V or 0/5V) to and from the ±5V to ±15V voltage levels defined by the EIA/TIA-232E (formerly RS-232) and ITU V.28/V.24 standards for serial communication. These parts sit in the hierarchy: RS-232 transceiver → line driver/receiver → interface IC → communication IC → semiconductor, and have been the workhorse of point-to-point PC serial ports since the 1980s. Charge-pump-based transceivers like the MAX232 family made the standard practical by removing the need for a dual-polarity power rail. Key features of the MAX232EPE+ include: integrated charge pump with internal ±10V generation, compatibility with all EIA/TIA-232E and V.28/V.24 interfaces, ESD protection on RS-232 pins, and low-power CMOS construction. The 16-PDIP package suits through-hole designs, breadboarding, and legacy equipment maintenance where SMD parts are not desirable. The device uses a dual charge-pump (voltage doubler and inverter) topology: the doubler boosts +5V to +10V using external capacitors, and the inverter produces -10V, yielding ±10V swing across each transmitter output. Receivers invert TTL/CMOS levels back to 5V logic. This architecture makes the MAX232 family ideal when a single +5V rail is available and ±12V cannot be provided. Typical applications include legacy PC serial ports, industrial PLCs and HMIs, point-of-sale terminals, embedded microcontroller UART interfaces, barcode scanners, and any system requiring a DB9 or similar RS-232 connection from a 5V logic domain. The extended temperature range suits factory automation environments. When designing with the MAX232EPE+, choose external charge-pump capacitors carefully — 1µF to 10µF ceramic or tantalum types are typical; undersized caps reduce driver output swing. Place the charge-pump caps and bypass cap within a few millimeters of the IC pins to maintain transmitter output compliance. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, helping engineers select and source the right RS-232 transceiver for legacy 5V designs.
MAX232ESE+ - Dual RS-232 Transceiver | Maxim Integrated
The Maxim Integrated MAX232ESE+ is a dual RS-232 line-driver and receiver interface IC operating from a 4.5 V to 5.5 V supply in a 16-pin SOIC package. It provides two transmit channels and two receive channels for systems that cannot directly use ±12 V RS-232 levels. The device supports data rates up to 120 kbps and is designed for EIA/TIA-232E, CCITT V.28, and V.24 communications interfaces. An RS-232 transceiver is an interface IC that converts low-voltage digital logic signals into RS-232-compatible electrical levels and converts incoming RS-232 signals back into logic-compatible levels. Within the broader hierarchy of interface ICs, transceiver ICs connect processor or controller logic to communication ports. The MAX232 family is especially useful where a positive single supply is available but the external line requires bipolar RS-232 voltage levels. The MAX232ESE+ uses CMOS circuitry and includes the charge-pump circuitry required to generate the bipolar levels used by the RS-232 drivers. Two driver outputs support transmit channels, while two receiver inputs support receive channels. Its stated operating supply range of 4.5 V to 5.5 V supports conventional +5 V digital systems. The manufacturer describes the family as particularly suitable for battery-powered equipment because a shutdown mode can reduce power consumption when the interface is not active. Its principal application is point-to-point serial communication between a host controller and an external RS-232 device. Typical examples include industrial control terminals, data-acquisition equipment, service interfaces, and legacy peripheral connections. At data rates up to 120 kbps, the device accommodates many legacy asynchronous serial protocols while operating from a single 5 V rail. A 120 kbps capability should not be confused with the much higher data rates sometimes associated with USB-to-serial converters. Circuit design requires correct treatment of RS-232 signal levels, including ground reference and, where cable length or noise conditions require it, protection for the external interface. Charge-pump capacitors must be connected exactly as shown in the manufacturer’s recommended application circuit. Keep the charge-pump and communication traces away from sensitive analog inputs, and verify the logic levels and connector-side protection before releasing a board. This page combines the manufacturer interface specifications, package information, application guidance, and verified cross-reference findings in a format intended for schematic review and sourcing decisions. It also distinguishes pin-compatible alternatives from options that require different packages or electrical changes, helping engineers assess replacement risk before modifying a PCB.
MAX232ID - 120kbps Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232ID is a dual-channel RS-232 line-driver and receiver IC that operates up to 120 kbit/s from a single 4.5 V to 5.5 V supply. The device provides two drivers and two receivers, generates the required bipolar RS-232 voltage levels with external charge-pump capacitors, and is housed in a 16-pin SOIC package. Its drivers support plus or minus 9 V output levels, while the receivers tolerate plus or minus 30 V input levels. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 electrical levels and converts received RS-232 signals back into logic levels. Within the interface hierarchy, it is an RS-232 transceiver, an interface IC, and a semiconductor used to bridge TTL or CMOS equipment with a serial communications bus. The MAX232ID is specifically associated with conventional TIA/EIA-232-F and ITU V.28 signaling rather than low-voltage differential protocols such as RS-485. Key features include two RS-232 drivers, two RS-232 receivers, operation from one 5 V supply, and a maximum data rate of 120 kbit/s. External 1 uF charge-pump capacitors are required to generate the bipolar transmitter supply. The receiver section supports plus or minus 30 V input levels, improving tolerance to transient voltages commonly encountered on longer cable runs. Typical supply current is listed as 8 mA in the verified source data. The MAX232ID implements the electrical conversion required at the boundary between a digital controller or UART and an RS-232 port. Because the drivers actively produce RS-232-level voltages, the circuit does not require a separate external RS-232 line driver. Conversely, the receivers convert incoming bipolar signals into a digital voltage compatible with the host logic supply. The complete device therefore consolidates both directions of a two-channel serial interface into one IC. Typical applications include industrial serial consoles, data acquisition equipment, laboratory instruments, point-of-sale systems, embedded control systems, and legacy computer peripherals. The 120 kbit/s operating limit suits conventional serial ports and short-distance point-to-point links. It is also appropriate for troubleshooting and repair systems that must remain compatible with equipment using full-strength RS-232 rather than low-voltage variants. Designers must follow the charge-pump capacitor recommendations and provide the required bypassing on the 5 V rail. Protection, grounding, cable length, and connector selection remain external system considerations. The MAX232ID does not replace the transceiver with an RS-485 or USB interface, and its electrical compatibility should be verified against the connected equipment before substitution. This page consolidates verified manufacturer and distributor information, same-package alternatives, pricing data, and practical engineering guidance. It distinguishes true SOIC-16 drop-in candidates from functional alternatives and highlights the electrical checks required when replacing an RS-232 transceiver.
MAX232IDG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232IDG4 is a dual RS-232 line-driver and receiver interface IC supporting data rates up to 120 kbit/s from a single 5 V supply. The device provides two transmit channels, two receive channels, approximately ±9 V driver output levels, and ±2 kV ESD protection in a 16-pin SOIC package. Its specified temperature range is -40 °C to 85 °C. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts incoming RS-232 signals back into digital logic. Within the broader hierarchy, the MAX232 is a serial-interface transceiver, placing it under interface ICs and data-conversion components used to connect computer, industrial-control, and embedded systems to older RS-232 equipment. The MAX232IDG4 implements the EIA-232 and V.28 signaling requirements described by the manufacturer. Its dual-channel architecture allows one package to serve two RS-232 ports. A charge-pump circuit generates the positive and negative voltages required by the drivers from one 5 V supply, eliminating the need for a separate bipolar supply. The charge-pump network requires 1.0 µF capacitors. Key electrical features include ±30 V receiver input levels, 120 kbit/s operation, and low supply current with a typical value of 8 mA. The driver output swing reaches approximately ±9 V, while the receiver converts the RS-232 line voltage into CMOS-compatible logic. The integrated ESD protection is specified at ±2 kV, making the interface suitable for equipment where cables can introduce electrostatic discharge. Typical uses include industrial controller serial ports, configuration interfaces on embedded systems, test and measurement equipment, and service connections for legacy computer peripherals. Because RS-232 is a point-to-point, unbalanced standard, the MAX232IDG4 is best placed between a host UART and a protected external connector rather than used as a multi-drop network interface. The main design consideration is charge-pump capacitor and connector layout. Place the 1.0 µF capacitors close to the charge-pump pins, route driver outputs and receiver inputs away from sensitive digital signals, and provide the connector-side protection and chassis-ground strategy required by the target equipment standard. Confirm signal levels and polarity in the system firmware or hardware interface before deployment. This product page combines manufacturer specifications, verified price evidence, strict same-package replacement options, and practical interface-layout guidance to support component selection, PCB reuse, and robust RS-232 implementation.
MAX232IDR - 120 kbps Dual RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232IDR is a 5 V dual-channel RS-232 line transceiver with two drivers and two receivers, a maximum data rate of 120 kbit/s, and a 16-pin SOIC package. Its integrated charge-pump circuitry develops the positive and negative voltages required by the EIA-232 interface while the device operates from a single 4.5 V to 5.5 V supply. An RS-232 transceiver is an interface IC that converts logic-level signals into bipolar RS-232 levels and converts incoming bipolar signals back into logic levels. Within the interface hierarchy, the MAX232 belongs to the RS-232 transceiver family of interface ICs used to connect modern digital equipment with legacy serial ports. It is especially useful where a UART provides TTL or CMOS logic but the peripheral expects true RS-232 signaling. The MAX232IDR provides two transmit channels and two receive channels, making it suitable for implementing one or two complete point-to-point serial links. Its stated 120 kbit/s operating rate covers standard asynchronous serial communication, while the single-supply design simplifies PCB power planning. The manufacturer also identifies approximately ±9 V driver output levels and ±2 kV ESD protection as principal benefits of the MAX232 family. Internally, the charge-pump voltage converter supplies the bipolar levels required by the drivers. Receivers tolerate RS-232 input levels down to ±30 V, allowing connected equipment to present stronger transients without immediately damaging the receive path. The manufacturer lists low supply current of approximately 8 mA typical, and the device is designed for interchangeability with the classic Maxim MAX232. Typical applications include serial adapters, industrial control consoles, instrumentation, and embedded systems that communicate with RS-232 equipment through a UART. One receiver and driver can form a bidirectional data path when the transmit and receive lines are cross-connected; the second pair provides another channel or additional unidirectional interface. It is also useful when a legacy printer, controller, or service port requires RS-232 rather than TTL levels. Designers should place the charge-pump capacitors close to the IC and route the RS-232 traces away from sensitive analog and high-speed digital signals. Decoupling near VCC reduces supply disturbance, while the receiver’s ±30 V input capability should not be confused with ±30 V output capability: the specified driver output is approximately ±9 V. Cable protection and grounding remain necessary for reliable operation with external equipment. This page combines the manufacturer’s electrical specifications, ordering information, package details, cross-reference results, and practical implementation guidance. It also identifies same-footprint alternatives and explains the electrical distinctions that should be checked before replacing the MAX232IDR in an existing design.
MAX232IN - Dual 120kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232IN is a dual EIA-232 driver and receiver interface IC that operates from a single 5 V supply, supports data rates up to 120 kbit/s, and provides +9 V and -9 V RS-232 outputs. The device includes two drivers, two receivers, and an on-chip capacitive voltage generator, and is packaged in a 16-pin PDIP. According to the manufacturer product page, the MAX232 also provides ±2 kV electrostatic-discharge protection on the RS-232 lines. An RS-232 transceiver is an interface IC that converts logic-level signals into voltage levels suitable for a serial communications link. Its hierarchy is transceiver > driver/receiver > interface IC > integrated circuit. The MAX232IN belongs to this category because it bridges a 5 V TTL or CMOS system and a ±9 V RS-232 port. It is useful when a controller, programmable logic, or test system needs bidirectional serial communication over longer distances than a logic-level UART connection can provide. The principal features include two transmit channels, two receive channels, a maximum data rate of 120 kbit/s, receiver input tolerance of ±30 V, and low supply current of 8 mA typical. Its on-chip charge-pump circuit derives the negative RS-232 voltage required by the drivers, so the device needs only one 5 V supply rather than a separate negative supply. The ±2 kV ESD protection rating adds a useful layer of protection for exposed connector-facing pins. The receivers convert RS-232 input voltages to TTL/CMOS logic levels and have a typical threshold of 1.3 V with 0.5 V typical hysteresis. The drivers convert TTL/CMOS logic inputs into RS-232 levels with +9 V and -9 V output capability. The combination of receiver hysteresis and input overvoltage tolerance helps distinguish valid signals from noise, while the dual-channel arrangement allows two RS-232 directions on one device. Typical applications include legacy RS-232 equipment interfaces, industrial controller ports, point-of-sale equipment, data acquisition systems, and service or diagnostic ports. A MAX232IN can connect a 5 V microcontroller UART to a DB9 or equivalent RS-232 connector, provided the board also includes the connector, protection components, grounding strategy, and any required line-conditioning components. The main design consideration is that the MAX232IN is a through-hole PDIP device and its charge-pump network requires the external capacitors specified by the manufacturer. Place those capacitors close to the supply and charge-pump pins, provide an uninterrupted ground path, and confirm signal levels and polarity at the connector. Although the receiver can accept ±30 V inputs, normal RS-232 operation still requires correct common-ground and cable arrangements. This page combines verified manufacturer and distributor information with practical interface guidance, same-package replacement options, parameter comparisons, and design notes for engineers evaluating MAX232IN in legacy RS-232 designs.
MAX232N - 5V Dual RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232N is a 5 V dual-channel RS-232 line driver and receiver capable of operating at 120 kbit/s, with ±9 V driver outputs, ±30 V receiver input tolerance, and ±2 kV ESD protection in a 16-pin PDIP package. It provides two drivers and two receivers plus an on-chip capacitive voltage generator, allowing a single 5 V supply to interface TTL or CMOS logic with TIA/EIA-232-F signals. An RS-232 interface transceiver is an interface IC that converts low-voltage digital logic levels into the bipolar voltage levels required by RS-232, then converts received bipolar signals back into TTL or CMOS levels. In the product hierarchy, the MAX232N belongs to the RS-232 transceiver class within interface ICs. The dual-channel architecture supports two simultaneous communication paths, while the integrated voltage generator eliminates the need for a separate negative supply rail. The MAX232N's principal features include support for data rates up to 120 kbit/s, two transmit channels, two receive channels, ±30 V receiver input tolerance, and ±2 kV ESD protection. Its capacitive voltage generator produces the negative voltage required by the RS-232 drivers from a single 5 V supply. The receiver threshold is typically 1.3 V with approximately 0.5 V hysteresis, helping reject noise while resolving valid logic states. The MAX232N combines TTL/CMOS-compatible inputs and outputs with RS-232 line-driver outputs. According to the manufacturer datasheet, the receivers accept signals as high as ±30 V, while the drivers produce approximately ±9 V output levels. This combination is useful when a system must tolerate legacy serial connectors, ground-potential differences, or electrostatic-discharge exposure while maintaining a conventional 5 V logic interface. Typical uses include industrial serial controllers, service equipment, data-acquisition systems, point-of-sale terminals, and legacy computer serial ports. The 120 kbit/s maximum data rate suits asynchronous RS-232 links that operate below high-speed differential-interface rates. The two-driver, two-receiver arrangement can also implement one bidirectional data path and one unidirectional status path, or two lower-speed channels. Designers should provide the charge-pump capacitors specified by the manufacturer and connect the interface connector through protection components suited to the required ESD and surge environment. The device is not a multi-drop RS-232 solution, and cable length, termination, grounding, and logic levels must be checked against the target system rather than inferred only from the 120 kbit/s headline specification. This page consolidates the verified manufacturer and distributor information, same-package replacement guidance, and practical interface-design considerations for engineers evaluating the MAX232N. It also distinguishes documented MAX232N characteristics from package or lead-time details that were not supplied by the retrieved sources.
MAX232NE4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
The Texas Instruments MAX232NE4 is a dual RS-232 driver and receiver transceiver built for two independent data channels, operating at up to 120 kbit/s from a single 5 V supply. It is packaged in a 16-pin PDIP and includes the charge-pump circuitry and external charge-pump capacitors needed to generate EIA-232 signal levels from a 5 V source. The device accepts input levels up to ±30 V and provides 8 mA typical ESD protection on its driver outputs, with the MAX232 family also specified for ±2 kV human-body-model ESD protection. An RS-232 transceiver is an interface IC that bridges the voltage-domain gap between TTL/CMOS logic and the bipolar, single-ended signal system defined by EIA-232. Within the broader electronics hierarchy, the MAX232NE4 is a line transceiver, which is a communication interface IC used to connect a digital controller or embedded system to a serial port. Two driver channels convert TTL/CMOS inputs into RS-232 levels, while two receiver channels convert RS-232 inputs into logic-compatible signals. Key electrical attributes include a 4.5 V to 5.5 V supply range, two drivers, two receivers, full RS-232 operation, a maximum signaling rate of 120 kbit/s, and ±30 V input-level capability. The integrated charge pump eliminates the need for a negative supply rail. The recommended implementation uses 1.0 uF charge-pump capacitors, which must be installed close to the device to limit loop area and preserve switching performance. The MAX232NE4 is appropriate for legacy RS-232 ports, industrial equipment, service interfaces, and embedded-control systems where a 5 V logic domain must communicate with a PC or peripheral over an RS-232 link. Unlike a modern USB-to-serial converter, it remains a wired, point-to-point interface and requires a host-side UART or another system that already provides serial framing. Designers should confirm the PCB footprint, charge-pump capacitor type, driver slew behavior, and receiver logic thresholds before substitution. The ±30 V input rating improves robustness against exposed or noisy cabling, but it does not remove the need for correct grounding, twisted-pair routing where applicable, and protection against sustained overvoltage events. This page consolidates verified manufacturer and distributor information, identifies only package-compatible cross-reference candidates, and adds application guidance and design cautions that are not summarized on a typical distributor listing.
MAX232NG4 - 5V Dual RS-232 Transceiver | Texas Instruments
Texas Instruments MAX232NG4 is a 5 V dual RS-232 line driver and receiver with two transmit channels, two receive channels, full-duplex operation, and a 120 kbps data rate in a 16-pin PDIP package. The device accepts a 4.5 V to 5.5 V supply, generates RS-232 voltage levels from one 5 V rail, converts incoming RS-232 signals to TTL/CMOS logic, and includes ±2 kV ESD protection according to the manufacturer product page. An RS-232 transceiver is an interface IC that bridges the voltage-domain difference between computer serial ports and embedded logic. The MAX232 family combines line drivers, line receivers, and a capacitive charge-pump voltage generator. This hierarchy places it within interface ICs and semiconductor signal-conditioning components, while its EIA/TIA-232-F function makes it useful for legacy serial communication, industrial control, and equipment interfaces. The principal operating characteristics include a 4.5 V to 5.5 V supply range, full-duplex operation, and a maximum signaling rate of 120 kbps. Each receiver converts an RS-232 input to a TTL/CMOS output, with a typical input threshold of 1.3 V, typical hysteresis of 500 mV, and the ability to accept inputs up to ±30 V. The integrated voltage generator avoids a separate ±12 V power supply when only one 5 V rail is available. The MAX232NG4 uses a charge-pump architecture to develop positive and negative RS-232 levels. That architecture simplifies board-level power design but requires the external charge-pump capacitors specified by the manufacturer. The device is intended for through-hole PCB assembly in the 16-pin PDIP package. The MAX232NG4 orderable variant is listed as obsolete, so new production designs should confirm current family options and lifecycle status before committing a BOM. Typical uses include legacy PC serial ports, programmable instrumentation, industrial control interfaces, service consoles, and embedded systems that exchange RS-232 commands with external equipment. The 120 kbps rate is appropriate for conventional serial links rather than high-speed differential networking. For a new board, the related MAX232 family in a surface-mount package may simplify assembly, but changing package construction requires PCB layout and thermal-soldering review. The primary design consideration is preserving the charge-pump capacitor connection and ensuring that connector-side signals and ground routing follow the manufacturer layout guidance. Input and output logic levels must also be checked against the connected host voltage. Because the MAX232NG4 package is obsolete, engineers should treat any replacement search as a lifecycle decision as well as an electrical and pin-compatibility assessment. This page consolidates the verified manufacturer and distributor information with lifecycle context, application guidance, practical design considerations, and a parameter-by-parameter comparison with documented same-package alternatives. It is intended to support engineering selection and sourcing decisions without obscuring the distinction between electrical equivalence and manufacturing-status changes.
MAX232NS - 2/2 RS-232 Transceiver, 120 kbps | Texas Instruments
Texas Instruments MAX232NS is a dual RS-232 transceiver with two drivers and two receivers, a maximum data rate of 120 kbps, a 4.5 V to 5.5 V supply range, and a 16-pin SOIC package. Designed for bidirectional serial communication, it converts TTL/CMOS logic levels to TIA/EIA-232-F signal levels and converts received RS-232 signals back to logic levels using one 5 V supply. An RS-232 transceiver is an interface IC within the broader transceiver and interface IC hierarchy. It bridges the voltage-domain difference between a modern digital system and a legacy RS-232 port. The MAX232NS includes an on-chip capacitive voltage generator, so the external circuit requires the specified charge-pump capacitors rather than a separate negative supply. This integration makes it suitable for equipment with a single positive supply rail. Key features include two transmit channels, two receive channels, a 120 kbps maximum data rate, and receiver hysteresis of 500 mV. According to the Texas Instruments datasheet SLLS047N, the receivers have a typical threshold of 1.3 V and can accept input voltages of ±30 V. The device operates from 4.5 V to 5.5 V and is offered here in the commercial-temperature 0 °C to 70 °C range. Technically, the transmitters convert TTL/CMOS inputs into RS-232 levels, while the receivers perform the inverse conversion. The integrated voltage generator produces the bipolar voltage required for RS-232 signaling from the 5 V supply. Receiver hysteresis helps reject noise around the input switching threshold, improving reliability on connections that may pick up interference. The dual-channel arrangement supports two independent RS-232 directions on one board. Typical uses include serial adapters, industrial control links, service equipment, data-acquisition systems, and legacy computer or peripheral connections. A transmit-and-receive pair can support one full-duplex RS-232 port, while the second channel can serve another port or provide an additional direction. The 16-pin SOIC package supports conventional surface-mount PCB assembly and standard automated production lines. The principal design consideration is charge-pump capacitor selection and placement. Use the capacitor values specified by the manufacturer and keep the associated traces short, because long or poorly routed paths can degrade startup behavior and increase supply transients. The supply must also remain within 4.5 V to 5.5 V, and exposed RS-232 inputs require protection appropriate to the installation environment. This page consolidates the verified manufacturer specifications, RS-232 application guidance, source links, and same-package replacement information. It is designed to help engineers identify the correct electrical limits, package, procurement data, and design considerations without relying on assumptions about unverified parameters.
MAX232NSR - 2/2 RS-232 Transceiver, 120 kbps | Texas Instruments (Tape & Reel)
Texas Instruments MAX232NSR is a dual RS-232 transceiver with two drivers and two receivers, a maximum data rate of 120 kbps, a 4.5 V to 5.5 V supply range, and a 16-pin SOIC package. Designed for bidirectional serial communication, it converts TTL/CMOS logic levels to TIA/EIA-232-F signal levels and converts received RS-232 signals back to logic levels using one 5 V supply. An RS-232 transceiver is an interface IC within the broader transceiver and interface IC hierarchy. It bridges the voltage-domain difference between a modern digital system and a legacy RS-232 port. The MAX232NSR includes an on-chip capacitive voltage generator, so the external circuit requires the specified charge-pump capacitors rather than a separate negative supply. This integration makes it suitable for equipment with a single positive supply rail. Key features include two transmit channels, two receive channels, a 120 kbps maximum data rate, and receiver hysteresis of 500 mV. According to the Texas Instruments datasheet SLLS047N, the receivers have a typical threshold of 1.3 V and can accept input voltages of ±30 V. The device operates from 4.5 V to 5.5 V and is offered here in the commercial-temperature 0 °C to 70 °C range. Technically, the transmitters convert TTL/CMOS inputs into RS-232 levels, while the receivers perform the inverse conversion. The integrated voltage generator produces the bipolar voltage required for RS-232 signaling from the 5 V supply. Receiver hysteresis helps reject noise around the input switching threshold, improving reliability on connections that may pick up interference. The dual-channel arrangement supports two independent RS-232 directions on one board. Typical uses include serial adapters, industrial control links, service equipment, data-acquisition systems, and legacy computer or peripheral connections. A transmit-and-receive pair can support one full-duplex RS-232 port, while the second channel can serve another port or provide an additional direction. The 16-pin SOIC package supports conventional surface-mount PCB assembly and standard automated production lines. The principal design consideration is charge-pump capacitor selection and placement. Use the capacitor values specified by the manufacturer and keep the associated traces short, because long or poorly routed paths can degrade startup behavior and increase supply transients. The supply must also remain within 4.5 V to 5.5 V, and exposed RS-232 inputs require protection appropriate to the installation environment. This page consolidates the verified manufacturer specifications, RS-232 application guidance, source links, and same-package replacement information. It is designed to help engineers identify the correct electrical limits, package, procurement data, and design considerations without relying on assumptions about unverified parameters.
MAX249CQH+D - 6-Driver/10-Receiver RS-232 Transceiver | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX249CQH+D is a +5V-powered multichannel RS-232 line driver/receiver in a 44-pin PLCC (16.59 x 16.59 mm) package with 6 drivers and 10 receivers (6/10 transceiver configuration). It operates from a single +5V supply and integrates internal charge-pump capacitors (no external caps required for the older non-MAX2xx parts), making it suitable for EIA/TIA-232E and V.28/V.24 communications interfaces where +/-12V rails are unavailable, such as portable and embedded equipment running off a single 5V logic supply. An RS-232 transceiver (line driver/receiver, formally a UART-to-EIA-232 interface) translates between CMOS/TTL logic levels used by microcontrollers or UARTs and the higher-voltage (+/-5V to +/-15V nominal) RS-232 signalling required by the legacy serial standard. The MAX249CQH+D's 6-driver / 10-receiver count targets fan-in applications where a host reads many input sources while driving several outputs, and its 120 kbps guaranteed data rate is well matched to legacy PC COM ports, industrial controllers, and point-of-sale terminals. Key features include on-board charge-pump voltage converters that synthesize the RS-232 +/-5V to +/-15V output levels from the single +5V input, low-power shutdown mode, and tri-state receiver outputs for bus sharing. The 44-pin PLCC package fits through-hole and socketed industrial backplanes, while the +D suffix indicates factory dry-pack tape-and-reel packaging for surface-mount placement. Operating temperature range is 0C to +70C (commercial grade, C in the part number). Technically, the MAX249CQH+D is built on a proprietary BiCMOS process that integrates vertical PNP charge-pump switches, low-dropout +5V drivers and +/-15V-tolerant receivers on the same die. The internal charge pump uses four small external 1uF capacitors (or in some family members none) to generate V+ and V- rails. Compared to older RS-232 designs that required +/-12V supplies and large bulk capacitors, this device reduces board area by approximately 80 percent and simplifies power architecture. Guaranteed 120 kbps minimum throughput and 3 kV HBM ESD tolerance on driver outputs support robust industrial deployment. Typical applications include industrial multi-drop RS-232 links, factory-automation controllers with many sensors, embedded point-of-sale and kiosk terminals, multi-channel UART fan-out for instrumentation, and portable test equipment. The 6/10 driver/receiver balance is uncommon among modern RS-232 ICs, making this part valuable for retrofit designs that must keep legacy cabling. When designing with this part, ensure the four charge-pump capacitors (typically 1uF to 22uF, low-ESR ceramic) are placed close to the C1+/C1-/C2+/C2- pins with adequate ground return. The +5V supply must deliver at least 50 mA plus 2 mA per active driver during transitions; inadequate decoupling causes charge-pump ripple that couples into the RS-232 output levels and degrades signal integrity. This page synthesizes current distributor pricing, drop-in alternative guidance, and practical design notes that complement (but do not replace) the Analog Devices MAX249 datasheet.
MAX3051ESA+ - 3.3V 1Mbps CAN Transceiver SOIC-8 | Maxim
The Maxim Integrated MAX3051ESA+ is a +3.3V, 1Mbps, low-supply-current CAN (Controller Area Network) bus transceiver housed in an 8-pin SOIC narrow-body package. It interfaces between a CAN protocol controller and the physical differential bus wires, providing a differential transmit path to the bus and a differential receive path back to the controller. The +3.3V single-supply operation targets modern low-voltage MCUs and ASICs that cannot tolerate the legacy 5V CAN transceivers. A CAN transceiver is the physical-layer (OSI layer 1) interface between a digital CAN controller and the two-wire differential bus. It converts digital transmit/receive logic into differential voltages compliant with ISO 11898, while also providing bus-side ESD protection and common-mode tolerance. The MAX3051 belongs to the Maxim CAN transceiver family (3.3V, low-Iq) which sits inside the broader categories of LIN/CAN/FlexRay transceivers, interface ICs, and finally wired-connectivity semiconductors used in industrial automation, building control, and harsh-environment embedded networks. Key features include a 1Mbps maximum data rate in high-speed mode, programmable slew-rate control for EMI-sensitive networks, and four operating modes: high-speed, slope-control, standby, and shutdown. The shutdown and standby states draw only a few hundred microamps, making the part well suited for battery-backed or sleep-cycling nodes. The bus-side common-mode range spans -7V to +12V, well beyond the ISO 11898 minimum of -2V to +7V, allowing reliable operation in electrically noisy industrial environments with large ground shifts. The MAX3051 is fabricated on a low-power CMOS process with on-chip bus drivers that meet ISO 11898-2 physical-layer signaling. The wide common-mode window, combined with the part's ±6kV HBM ESD rating on the bus pins (per Maxim datasheet), enables robust operation in non-automotive harsh environments such as factory floor nodes, building automation backbones, and motor-drive gateways where ground-potential differences exceed ISO 11898 minimums. Typical applications include industrial CAN nodes (PLC modules, sensor hubs), building-automation networks (BACnet over CAN, HVAC controllers), motor-drive CAN command links, embedded sensor networks, and any 3.3V MCU needing CAN connectivity without the cost or power of an automotive-grade transceiver. The low Iq also suits solar or battery-powered remote nodes. When designing with the MAX3051ESA+, place 100nF supply-bypass capacitors as close as possible to VCC and route the CANH/CANL traces as a tightly-coupled 100-ohm differential pair with characteristic impedance of 120 ohms per ISO 11898. Always include a split-termination network (60 ohms + 4.7nF at each end) to suppress common-mode ringing in long stubs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
MAX3070EAPD+ - 3.3V 250kbps RS-485/422 Transceiver | Analog Devices
Analog Devices MAX3070EAPD+ is a 3.3V full-duplex RS-485/RS-422 interface IC rated for data rates up to 250kbps, with ±15kV ESD protection, fail-safe receiver operation, and hot-swap capability. The device is packaged in a 14-pin PDIP and integrates one driver and one receiver for bidirectional point-to-point or multidrop industrial communication links. An RS-485/RS-422 transceiver is an interface integrated circuit that converts logic-level signals into differential bus voltages and converts received differential signals back into CMOS-compatible logic. These differential interfaces belong to the broader serial-interface IC and industrial-communication hierarchy. Their common-mode tolerance, noise immunity, and fault-safe thresholds help preserve data integrity across cables, connectors, motors, automation equipment, and industrial controllers. The MAX3070EAPD+ operates from a 3.3V supply and combines several protection-oriented features in one transceiver. Its ±15kV ESD rating supports robust connection to external equipment, while fail-safe receiver circuitry provides defined behavior during bus idle, driver disconnect, or shorted-driver conditions. Hot-swap operation permits the device to join a live bus without disruptive initialization, making it useful in systems with removable or field-serviceable communication modules. This member of the MAX3070E through MAX3079E family combines a one-driver, one-receiver arrangement with full RS-485 and RS-422 operation. The 250kbps maximum signaling rate suits moderate-speed control and monitoring links rather than high-bandwidth storage or video networks. Differential signaling reduces susceptibility to common-mode noise relative to single-ended implementations, especially on industrial cables routed near motors, relays, and switching power equipment. Typical uses include industrial automation controllers, programmable-logic-crane controllers, building-control equipment, instrumentation, motor-control interfaces, and isolated or non-isolated industrial data links. The transceiver can also bridge legacy controller UART signals to differential RS-485 equipment. Because the device provides both transmit and receive paths, a full-duplex connection requires two differential pairs and separate driver-enable and receiver-enable control according to the bus architecture. PCB design should preserve controlled differential impedance, minimize stub lengths, and keep the transceiver close to the connector. Place protection devices near the external interface, provide local supply decoupling, and route the logic ground cleanly to the bus-return path. Verify termination, biasing, and enable sequencing against the cable length, node count, and topology used by the target network. This product reference combines the exact MAX3070EAPD+ ratings, package information, interface role, application guidance, drop-in family alternatives, and engineering-focused comparison points to support faster component selection, PCB implementation, and sourcing decisions.
MAX3070EASD+ - 3.3V Fail-Safe RS-485/RS-422 | Analog Devices
Analog Devices MAX3070EASD+ is a 3.3 V RS-485/RS-422 interface transceiver with one driver and one receiver, ±15 kV ESD protection, fail-safe receiver operation, and hot-swap capability in a 14-pin SOIC package. It is designed for bidirectional industrial data links requiring reliable operation when bus drivers are disabled, disconnected, shorted, or replaced. An RS-485/RS-422 transceiver is an interface IC that converts digital logic signals into differential bus voltages and converts returning differential signals into logic levels. The MAX3070E family belongs to the RS-485/RS-422 interface IC category, supporting industrial communications, data acquisition, instrumentation, and control systems where noise immunity and deterministic bus behavior are important. The MAX3070EASD+ combines a 3.3 V operating supply with ±15 kV ESD-protected bus terminals. Its fail-safe circuitry produces a receiver logic-high output when receiver inputs are open or shorted, avoiding an indeterminate receiver state when all transmitters are disabled. The hot-swap feature further supports systems where a transceiver may be connected to an active bus without disrupting communication. The device contains one driver and one receiver, allowing a full-duplex RS-422 connection or a half-duplex RS-485 connection when the driver and receiver directions are managed appropriately. Its differential interface is suited to industrial environments where common-mode voltage, ground offsets, and electrostatic discharge can degrade single-ended logic links. The SOIC-14 package supports conventional surface-mount assembly and compact board placement. Typical applications include industrial RS-485 sensor networks, factory-floor equipment interfaces, building automation controllers, remote instrument links, and data-acquisition systems. The fail-safe and hot-swap functions are especially useful in bus architectures where nodes may be powered on or off at different times. RS-422 wiring is preferred for point-to-point full-duplex links, while RS-485 permits multi-drop buses when termination and biasing are designed correctly. PCB design should preserve the differential signal path, provide the supply and bypass capacitance required by the manufacturer data sheet, and place protection components close to the connector. Keep the ground reference continuous beneath the interface and route driver and receiver differential pairs together to avoid converting common-mode noise into differential errors. This page combines the manufacturer’s stated interface capabilities, package information, lifecycle context, cross-part comparisons, and practical bus-layout guidance. It is designed to help engineers identify whether the MAX3070EASD+ fits an existing RS-485 or RS-422 design before completing footprint, protection, termination, and sourcing reviews.
MAX3070EEPD+ - 3.3V Fail-Safe RS-485 Transceiver | Analog Devices
Analog Devices MAX3070EEPD+ is a 3.3V RS-485/RS-422 half-duplex transceiver with one driver, one receiver, a 250 kbps data rate, and a 14-pin PDIP package. It provides ±15 kV ESD protection, fail-safe receiver operation, and hot-swap capability. The device operates from a 2.97 V to 3.63 V supply and is intended for industrial communications equipment. An RS-485/RS-422 transceiver is an interface IC that converts between digital logic signals and balanced differential bus signals. The MAX3070EEPD+ belongs to the interface transceiver hierarchy, combining a line driver, line receiver, protection circuitry, and fail-safe logic in one package. Balanced signaling improves noise immunity and permits reliable data transfer over longer cable runs than single-ended interfaces in electrically noisy environments. The principal features are a 3.3 V operating supply, one-driver/one-receiver configuration, and a maximum data rate of 250 kbps. The ±15 kV ESD rating helps protect the bus-facing pins from electrostatic discharge encountered during installation or maintenance. Fail-safe circuitry guarantees a logic-high receiver output when the receiver inputs are open or shorted, avoiding an indeterminate logic state on an idle or faulted bus. The MAX3070EEPD+ is designed for RS-485 and RS-422 networks that require a low-noise, fault-tolerant differential interface. Its one-driver, one-receiver organization can support half-duplex communication when the direction of data flow is controlled by an external transceiver-enable circuit. The device also supports hot-plug behavior, which is useful in systems where an attached node may connect or disconnect while the bus is active. Typical applications include industrial sensor networks, factory automation equipment, building-control systems, data acquisition units, instrument interfaces, and embedded serial links. A 3.3 V microcontroller or processor can use the transceiver to connect a logic-level UART to a field bus while receiving differential bus signals through the receiver channel. Designers should confirm the receiver and driver enable polarity, bus termination, grounding, and connector arrangement before layout. The ±15 kV protection rating applies to specified ESD conditions; it does not replace surge protection for the complete installation. Keep the ground reference consistent across connected equipment and use twisted-pair wiring for the differential bus. This page consolidates device specifications, package and application guidance, parameter comparisons, and engineering design notes into a focused engineering reference for selecting and implementing the MAX3070EEPD+ in 3.3 V RS-485 and RS-422 systems.
MAX3070EESD+ - 3.3V RS-485/RS-422 Transceiver | Maxim Integrated
The Maxim Integrated MAX3070EESD+ is a 3.3 V RS-485/RS-422 interface transceiver featuring one driver, one receiver, ±15 kV ESD protection, fail-safe operation, and hot-swap capability in a 14-pin SOIC package. Its combination of RS-485 and RS-422 support makes it suitable for industrial communication links that require robust differential signaling. An RS-485/RS-422 transceiver is a line-interface IC that converts between single-ended logic signals and differential physical-layer signals. It belongs to the interface IC hierarchy within integrated circuits and combines a differential line driver, a differential receiver, and protection circuitry. Differential signaling improves noise immunity by representing information as the voltage difference between two conductors rather than the voltage referenced only to ground. Key features include a 3.3 V supply, ±15 kV ESD protection, fail-safe receiver behavior, and hot-swap capability. The fail-safe circuit guarantees a logic-high receiver output when receiver inputs are open or shorted, helping prevent uncontrolled bus states. The device also supports both RS-485 and RS-422 applications through its one-driver, one-receiver configuration. Technically, the MAX3070E family combines low-power 3.3 V operation with protected communication interfaces. The differential driver communicates over long cable runs, while the receiver distinguishes the intended differential signal from common-mode noise. ESD protection is especially important in industrial environments where cables can be connected or disconnected while the equipment remains powered. Typical uses include industrial RS-485 buses, factory automation equipment, building-control systems, instrumentation links, and isolated or non-isolated communication interfaces. The 14-pin SOIC package is suitable for conventional surface-mount PCB assembly, while the extended industrial temperature range supports operation from -40°C to 85°C. Designers should verify the complete pinout, termination requirements, driver enable timing, and supply decoupling against the manufacturer datasheet before layout. A controlled-impedance or properly terminated differential pair is important for reliable field-bus operation, and exposed connector routes may require additional board-level ESD protection. This product data combines manufacturer information, current distributor observations, verified alternatives, package details, and application-oriented engineering guidance. It also distinguishes confirmed target-device facts from parameters that still require datasheet verification, helping procurement and design teams make more reliable decisions.
MAX3070EESD+T - 3.3V RS-485/RS-422 Transceiver | Analog Devices
Analog Devices MAX3070EESD+T is a 3.3V full-duplex RS-485/RS-422 interface transceiver with one driver, one receiver, ±15kV ESD protection, fail-safe receiver operation, and hot-swap capability in a 14-pin narrow SOIC package. Its 2.97V to 3.63V supply range supports low-voltage industrial and embedded communication systems. An RS-485/RS-422 transceiver is an interface IC that converts between digital logic signals and balanced differential bus signals. It belongs to the transceiver hierarchy within interface ICs, connecting UART, microcontrollers, and industrial controllers to long, noise-resistant differential buses. RS-422 emphasizes point-to-point, full-duplex communication, while RS-485 supports multidrop buses and half-duplex operation depending on how the driver enable is controlled. The MAX3070E family combines a 250kbps-class RS-485/RS-422 interface with protective and operational features intended for industrial environments. ±15kV ESD protection improves tolerance of electrostatic discharge on bus-facing pins. Fail-safe receiver circuitry guarantees a logic-high receiver output when the receiver inputs are open or shorted, avoiding an indeterminate logic state on a disconnected bus. Hot-swap support allows the device to tolerate connection to a powered bus. The transceiver uses separate driver and receiver paths for full-duplex communication. The MAX3070EESD+T operates from a 2.97V to 3.63V supply, making it appropriate for 3.3V systems where a 5V interface device would exceed the permitted supply range. Its one-driver, one-receiver arrangement maps naturally to four-wire RS-422 links and can also support half-duplex RS-485 designs when the bus implementation and enable control are configured accordingly. Typical uses include industrial serial links, building automation, process-control equipment, instrumentation, POS terminals, and factory data-acquisition systems. The balanced differential bus reduces susceptibility to common-mode noise relative to single-ended communication, while fail-safe operation improves system behavior during cable faults or disconnected nodes. Designers should preserve the transceiver’s specified supply voltage, termination, protection-network, and common-mode limits. Place the device close to the bus connector, provide a low-impedance ground reference, and follow the manufacturer’s pin-description table and recommended interface circuit. This page also organizes practical application guidance, comparison parameters, and sourcing information around the exact MAX3070EESD+T ordering code. This page provides a concise engineering synthesis of the MAX3070EESD+T interface function, operating constraints, application fit, and design considerations. It translates the manufacturer’s product information into selection guidance for engineers evaluating a robust 3.3V differential bus transceiver.