| RF and Wireless | 7 | Active | |
MAX704Low-Cost Microprocessor Supervisory Circuits with Battery Backup | RF Transmitters | 33 | Active | These microprocessor (µP) supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in µP systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components.These devices are designed for use in systems powered by 3.0V or 3.3V supplies. See the selector guide in the back of this data sheet for similar devices designed for 5V systems. The suffixes denote different reset threshold voltages: 3.075V (T), 2.925V (S), and 2.625V (R) (seeReset Thresholdsection in theDetailed Description). All these parts are available in 8-pin DIP and SO packages. Functions offered in this series are as follows:PartActive-Low ResetActive-High ResetWatchdog InputManual Reset InputBackup-Battery SwitchPower-Fail Threshold AccuracyPower-Fail ComparatorReset WindowMAX690√√√±4%√±75mVMAX704√√√±4%√±75mVMAX802√√√±2%√±2%MAX804√√√±2%√±2%MAX805√√√±4%√±75mVMAX806√√√±2%√±2%ApplicationsBattery-Powered Computers/ControllersCritical µP MonitoringEmbedded ControllersIntelligent InstrumentsPortable Equipment |
MAX7042308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver | RF Receivers | 4 | Active | The MAX7042 fully integrated, low-power, CMOS superheterodyne RF receiver is designed to receive frequency-shift-keyed (FSK) data at rates up to 66kbps nonreturn-to-zero (NRZ) (33kbps Manchester). The MAX7042 requires only a few external components to realize a complete wireless RF receiver at 308, 315, 418, and 433.92MHz.The MAX7042 includes all the active components required in a superheterodyne receiver including a low-noise amplifier (LNA), an image-rejection (IR) mixer, a fully integrated phase-locked loop (PLL), local oscillator (LO), 10.7MHz IF limiting amplifier with received-signal-strength indicator (RSSI), low-noise FM demodulator, and a 3V regulator. Differential peak-detecting data demodulators are included for baseband data recovery.The MAX7042 is available in a 32-pin TQFN and is specified over the automotive -40°C to +125°C temperature range.ApplicationsHome and Office Lighting ControlHome AutomationLocal Telemetry SystemsRemote Keyless Entry (RKE)Remote SensingSecurity SystemsSmoke AlarmsTire-Pressure Monitoring (TPM) |
| RF Transmitters | 2 | Obsolete | |
| RF, RFID, Wireless Evaluation Boards | 3 | Active | |
MAX705Low-Cost, µP Supervisory Circuits | Integrated Circuits (ICs) | 19 | Active | The MAX705–MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components.The MAX705/MAX706/MAX813L provide four functions:A reset output during power-up, power-down, and brownout conditions.An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds.A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V.An active-low manual-reset input.The MAX707/MAX708 are the same as the MAX705/MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of active-low RESET.Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and µMAX®packages.ApplicationsComputersControllersCritical µP Power MonitoringIntelligent Instruments |
| RF Transmitters | 2 | Obsolete | |
MAX7058315MHz/390MHz Dual-Frequency ASK Transmitter | RF, RFID, Wireless Evaluation Boards | 3 | Active | The MAX7058 UHF transmitter alternatively transmits ASK/OOK data at 315MHz or 390MHz using a single crystal. The MAX7058 has internal tuning capacitors at the output of the power amplifier that can be programmed for matching to the antenna or load. The MAX7058 can transmit at a data rate up to 100kbps NRZ (50kbps Manchester coded). Typical transmitted power into a 50Ω load is +10dBm. The MAX7058 operates from +2.1V to +3.6V and draws under 8.0mA of current. The standby current is less than 1µA at room temperature. A 15MHz crystal is used as the reference for 315MHz and 390MHz operation by selecting synthesizer-divide ratios of 21 and 26, respectively.The MAX7058 is available in a 4mm × 4mm, 24-pin thin QFN package and is specified to operate in the –40°C to +125°C automotive temperature range.ApplicationsGarage Door OpenersHome AutomationRF Remote ControlsSecurity SystemsWireless Sensors |
MAX706+3V Voltage Monitoring, Low-Cost, µP Supervisory Circuits | Integrated Circuits (ICs) | 77 | Active | The MAX706P/R/S/T, MAX706AP/AR/AS/AT, and MAX708R/S/T microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor +3V power-supply levels in +3V to +5V µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components.The MAX706P/R/S/T and MAX706AP/AR/AS/AT supervisory circuits provide the following four functions:1) A reset output during power-up, power-down, and brownout conditions.2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s.3) A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than the main supply.4) An active-low, manual-reset input.The only difference between the MAX706R/AR, MAX706S/AS, and MAX706T/AT is the reset-threshold voltage levels, which are 2.63V, 2.93V, and 3.08V, respectively. All have active-low reset output signals. The MAX706P/AP are identical to the MAX706R/AR, except the reset output signal is active-high. The watchdog timer function for the MAX706AP/AR/AS/AT disables when the WDI input is left open or connected to a high-impedance state of a low-leakage tri-state output.The MAX708R/S/T provide the same functions as the MAX706R/S/T and MAX706AR/AS/AT except they do not have a watchdog timer. Instead, they provide both active-low RESET and RESET outputs. As with the MAX706, devices with R, S, and T suffixes have reset thresholds of 2.63V, 2.93V, and 3.08V, respectively.These devices are available in 8-pin SO, DIP, and µMAX® packages and are fully specified over the operating temperature range.ApplicationsBattery-Powered EquipmentComputersControllersCritical µP Power MonitoringIntelligent InstrumentsPortable Instruments |
| Evaluation Boards | 4 | Obsolete | |
