Analog Devices Inc./Maxim Integrated

The MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.All devices achieve a 1µA supply current using Maxim's revolutionary AutoShutdown Plus™ feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiver input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system.The MAX3225E/MAX3227E/MAX3245E also feature MegaBaud™ operation, guaranteeing 1Mbps for high-speed applications such as communicating with ISDN modems. The MAX3224E/MAX3226E/MAX3244E guarantee 250kbps operation. The transceivers have a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation from a 3.3V supply. The MAX3224E–MAX3227E feature a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.All devices are available in a space-saving TQFN, SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/MAX3245E) packages.ApplicationsAutomotiveBattery-Powered EquipmentCellular PhonesHandheld EquipmentNotebook, Subnotebook, and Palmtop ComputersPeripheralsPrinters

The MAX3238E/MAX3248E transceivers use Maxim's revolutionary AutoShutdown Plus™ feature to achieve 10nA supply current. These devices shut down the on-board power supply and drivers when they do not sense a valid signal transition on either the receiver or transmitter inputs. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The devices turn on again when a valid transition is applied to any RS-232 receiver or transmitter input. AutoShutdown Plus automatically achieves this power savings through its on-board circuitry, as no changes are required to the existing BIOS or operating system.All RS-232 inputs and outputs, as well as the logic I/O pins, have enhanced ESD protection to ±15kV. The additional ESD protection on the logic I/O pins makes the MAX3238E/MAX3248E ideal for cell phone data cable applications because it eliminates the need for costly external TransZorb™ or protection schemes.The MAX3238E/MAX3248E contain five drivers and three receivers and are 3V-powered EIA/TIA-232 and V.28/V.24 communication interfaces intended for cell phones, data cables, and modem applications. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. A guaranteed data rate of 250kbps provides compatibility with popular software for communicating with personal computers.The MAX3238E and the MAX3248E differ only in their input logic thresholds. The MAX3238E has standard logic thresholds, while the MAX3248E has low-level logic thresholds of 0.6V to 1.2V, which are ideal for 1.8V systems.The transmitter inputs, FORCEON, and active-low FORCEOFF have a 400 kilohms active positive feedback resistor. Once driven to a valid logic level, they will retain this level if the driving signal is removed or goes high impedance. Unused transmitter and logic inputs may be left unconnected. The MAX3238E/MAX3248E can operate with supply voltages ranging from +3.0V to +5.5V.ApplicationsBattery-Powered ApplicationsCellular Data CablesData CradlesModemsPeripheralsPrinters

The MAX3250 is a 3.0V to 5.5V powered, ±50V isolated EIA/TIA-232 and V.28/V.24 communications interface with high data-rate capabilities. The MAX3250 is a dual die part that operates with up to ±50V difference between the RS-232 side and the logic side (ISOCOM to GND). This makes the device ideal for operation in noisy conditions with high common-mode voltages. This feature prevents damage to the device if RS-232 lines are inadvertently short-circuited to a +24V or ±48V power bus.The MAX3250 is powered by a single 3V to 5.5V supply on the logic side. Power is transferred from the logic side to the isolated side by ±100V external capacitors.The MAX3250 has two receivers (Rx) and two drivers (Tx) and is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels. The transceivers have a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a 3V to 5.5V supply with a dual charge pump. The device features an active-low FAULT open-drain output to signal an excessive isolated-side voltage condition on any of the RS-232 inputs. This output can drive an alarm LED or can be monitored by the processor to prevent operation under these conditions. The receiver outputs are high impedance in shutdown, allowing multiple interfaces (IrDA, RS-232, RS-485) to be connected to the same UART.The MAX3250 is available in a space-saving 28-pin SSOP package.ApplicationsDiagnostic PortsIndustrial ControlPC-to-Router ConnectionsPoint-of-Sale EquipmentProgrammable Logic ControllersTelecom Equipment

DeepCover®embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.The DeepCover Secure microcontroller (MAX32510) provides an interoperable, secure, and cost-effective solution to build new generations of trusted devices. The MAX32510 includes an Arm®Cortex®-M3 core, 512KB of embedded flash, 96KB of system RAM, 1KB of battery-backed AES self-encrypted NVSRAM. It includes a cryptographic engine, a true random number generator, battery-backed RTC, environmental and tamper detection circuitry, and a smart card UART. It also includes a vast array of peripherals, such as I2C, USB, SPIs, UARTs, DMA, and ADC that add flexibility to control and differentiate the system design.Thanks to its flexible architecture, the MAX32510 can be used as the main processor of an embedded device or as a coprocessor for applications that require more computing power. It can support the most frequent requirements for connected or standalone objects including secure key storage, secure boot, secure communications, certificates distribution and management as well as NVSRAM with instant content destruction capability which can support FIPS 140-2 level 3 or 4.ApplicationsGateways and RoutersInternet Of Things securitySet-Top Boxes

DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.The DeepCover secure microcontroller MAX32520 provides an interoperable, secure, and cost-effective solution to build new generations of trusted embedded systems and communication devices such as IoT, IoT gateways, and wireless access points.The MAX32520 incorporates Maxim's patented ChipDNA™ PUF technology. ChipDNA technology involves a physically unclonable function (PUF) that enables cost-effective protection against invasive physical attacks. Using the random variation of semiconductor device characteristics that naturally occur during wafer fabrication, the ChipDNA circuit generates a unique output value that is repeatable over time, temperature, and operating voltage. Attempts to probe or observe ChipDNA operation modifies the underlying circuit characteristics, preventing discovery of the unique value used by the chip cryptographic functions. The MAX32520 utilizes the ChipDNA output as key content to cryptographically secure all device stored data including user firmware. User firmware encryption provides ultimate software IP protection. The ChipDNA can also generate a private key for the ECDSA signing operation.The MAX32520 integrates an Arm® Cortex® -M4 processor, 2MB of Flash, 136KB of system RAM + 34KB ECC, 8KB of one-time-programmable (OTP) memory and 128KB of boot ROM.The MAX32520 provides a FIPS/NIST compliant TRNG, environmental and tamper detection circuitry to facilitate system-level security.Multiple high-speed interfaces are supported including SPI, UART, and an I²C. The four on-chip timers also support PWM output generation for direct control of external devices. One of the SPI ports has a serial flash emulation mode allowing direct code fetching enabling secure boot for a host microcontroller.ApplicationsEmbedded Communication Equipment (Routers, Gateways, etc.)Embedded Connected SystemsIoT Nodes and GatewaysSecure Industrial Appliances, Sensors, and ControllersSet-Top Boxes

DeepCover®embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.The DeepCover Secure microcontroller (MAX32552) provides an interoperable, secure, and cost-effective solution to build new generations of trusted devices such as mobile chip and pin pads. The MAX32552 is based on an Arm®Cortex®-M3 processor with 1MB of embedded flash, 384KB of system RAM, 8KB of battery-backed AES self-encrypted NVSRAM. In addition to a high-performance QSPI®interface for secure code execution and data storage, it includes most of the essential functions of mobile POS terminal including a cryptographic engine, a true random number generator, battery-backed RTC, environmental and tamper detection circuitry, a magnetic stripe reader, a smart card controller with embedded transceiver to directly support 1.8V, 3.3V, and 5V cards, and an integrated secure keypad controller. It also provides a seamless interface to monochrome graphic displays and includes a vast array of peripherals, SPIs, UARTs, DMA, ADC, and DAC that add flexibility to control and differentiate the system design.ApplicationsATM KeyboardsContact Pin PadsEMV Card ReaderPCI Mobile Payment Terminals (mPOS)

DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.The DeepCover Secure microcontroller (MAX32555) provides an interoperable, secure, and cost-effective solution to build new generations of trusted devices such as mobile chip and pin pads. The MAX32555 is based on an Arm Cortex M3 processor with 512KB of embedded flash, 96KB of system RAM, 1KB of battery-backed AES self-encrypted NVSRAM. It includes all the essential functions of mobile POS terminal including a cryptographic engine, a true random number generator, battery-backed RTC, environmental and tamper detection circuitry, a magnetic stripe reader, a smart card controller with embedded transceiver to directly support 1.8V, 3.3V, and 5V cards, and an integrated secure keypad controller. It also includes a vast array of peripherals, SPIs, UARTs, DMA, ADC, and DAC that add flexibility to control and differentiate the system design.ApplicationsATM KeyboardsEMV Card ReaderPCI Mobile Payment Terminals (mPOS)