MAXIM Manuals

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The MAX730A/MAX738A/MAX744A are 5V-output CMOS, step-down switching regulators. The MAX738A/ MAX744A accept inputs from 6V to 16V and deliver 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply current is 1.7mA and only 6µA in shutdown. Pulse-width modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±5% over line, load, and temperature variations. Fixed-frequency switching allows easy filtering of output ripple and noise, as well as the use of small external components. These regulators require only a single inductor value to work in most applications, so no inductor design is necessary. The MAX730A/MAX738A/MAX744A also feature cycle- by-cycle current limiting, overcurrent limiting, undervolt- age lockout, and programmable soft-start protection.

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The MAX7384 is a dual-speed silicon oscillator produced by Texas Instruments. It is used in 3V, 3.3V, and 5V circuits and has high accuracy, anti-interference, and low power consumption. It can be used in home appliances, industrial, and automotive applications.

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max7383 is a clock oscillator produced by dinghao electronic technology co., LTD., which has a high-speed oscillator and a 32.768khz oscillator. The clock output can be switched at any time between the high-speed clock and the 32.768khz clock for low-power operation. The high-output-drive current and the absence of high-impedance nodes make the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range as standard, the MAX7383 is a good choice for demanding home appli- ance and automotive environments.

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The MAX7382 is a silicon oscillator that replaces ceramic resonators, crystals, and crystal oscillator modules as the clock source for microcontrollers. It features resistance to vibration and EMI, making it suitable for 3V, 3.3V, and 5V applications. The MAX7382 has a factory-programmed oscillator and a microprocessor power-on-reset supervisor. It has a high-output-drive current and no high-impedance nodes, making it less susceptible to dirty or humid operating conditions. It is a good choice for demanding home appliance and automotive environments.

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The MAX7381 is a silicon oscillator intended as a low-cost improvement to ceramic resonators, crystals, and crystal oscillator modules as the clock source for microcontrollers and UARTs in 3V, 3.3V, and 5V applications. The MAX7381 is an integrated oscillator, supplied at specific frequencies, just like crystals and resonators, and with a rail-to-rail, 50%, duty-cycle square-wave output. The oscillator frequency is generated directly without the use of a phase-locked loop (PLL). No additional components are required for setting or adjusting the frequency. Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7381 is resistant to vibration and EMI. The high output-drive current and absence of high-impedance nodes make the oscillator invulnerable to dirty or humid operating conditions. With a wide operating temperature range as standard, the oscillator is a good choice for demanding appliance and automotive environments. The MAX7381 is available with frequencies in the 10MHz to 16MHz range. The MAX7381 is offered in a space-saving 3-pin SC70 package. All ICs are guaranteed to operate over the -55°C to +135°C temperature range and specified from the -40°C to +125°C temperature range.

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The MAX7378 is a silicon oscillator with reset from MAXIM that provides the primary and secondary clock source and reset function for microcontrollers in 3V, 3.3V, and 5V applications. It is resistant to vibration and EMI.

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The MAX7377 is a dual-speed silicon oscillator with reset that is a replacement for ceramic resonators, crystals, crystal oscillator modules, and discrete reset circuits. The device provides the primary and secondary clock source for microcontrollers in 3V, 3.3V, and 5V applications. The MAX7377 features a factory-programmed high-speed oscillator, a 32.768kHz oscillator, and a clock selector input. The clock output can be switched at any time between the high-speed clock and the 32.768kHz clock for low-power operation. Switchover is synchronized internally to provide glitch-free clock switching. Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7377 is resistant to vibration and EMI. The high-output-drive current and absence of high- impedance nodes make the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range as standard, the MAX7377 is a good choice for demanding home appliance, industrial, and automotive environments. The MAX7377 is available in factory-programmed frequencies from 32.768kHz to 10MHz. See Table 1 for standard frequencies and contact the factory for custom frequencies. The MAX7377 is available in a 5-pin SOT23 package. Refer to the MAX7383 data sheet for frequencies ≥10MHz. The MAX7377 standard operating tempera- ture range is -40°C to +125°C. See the Applications Information section for the extended operating temper- ature range.

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MAX7376 is a silicon oscillator with reset that replaces ceramic resonators, crystals, crystal oscillator modules, and discrete reset circuits. It provides the primary clock source and reset function for microcontrollers in 3V, 3.3V, and 5V applications. The MAX7376 features a factory-programmed high-speed oscillator and a microprocessor (µP) power-on-reset (POR) supervisor. Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7376 is resistant to vibration and EMI. The high-output-drive current and absence of high-impedance nodes make the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range as standard, the MAX7376 is a good choice for demanding home appliance, industrial, and automotive environments. The MAX7376 is available in factory-programmed frequencies from 32.768kHz to 10MHz. See Table 2 for standard frequencies and contact the factory for custom frequencies. The MAX7376 is available in a 5-pin SOT23 package. Refer to the MAX7382 data sheet for frequencies ≥10MHz. The MAX7376 standard operating temperature range is -40°C to +125°C. See the Applications Information section for the extended operating temperature range.

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MAX7324 is a 2-wire serial interface peripheral with 16 I/O ports that are divided into eight push-pull outputs and eight inputs. Its applications include cell phones, notebooks, SAN/NAS, automotive servers, satellite radio, etc.

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MAX7321 is a 8-channel input-output chip from Texas Instruments

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The MAX7323 is a 2-wire serial-interfaced peripheral with eight I/O ports. Four ports are push-pull outputs and the other four are open-drain I/O ports, independent of supply voltage. The four I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the open-drain INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7323 is subsequently accessed through the serial interface, any pending interrupt is cleared. The four push-pull and four open-drain outputs are rated to sink 20mA and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication to or from the MAX7323. The MAX7323 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables or disables internal 40kΩ pullups for the input ports in groups of two ports. The MAX7323 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports.

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The MAX7319 is a 2-wire serial-interfaced peripheral with eight input ports, selectable internal pullups, overvoltage protection, and transition detection with interrupt output. It supports 16 I2C slave addresses. It also supports hot insertion.

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