LM1949N

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The LM1949N from Texas Instruments is designed for applications such as automotive body electronics and consumer appliances, specifically for the control of Integrated Management Central Timers (IMCTs). With an operating temperature range from -40 to 125 °C and an absolute maximum continuous junction temperature of 150 °C, the LM1949N is ideal for many demanding applications.

The LM1949N is a power management integrated circuit (PMIC) that provides digital control of IMCTs, including a wide range of functions, such as integrated input filters, buffered outputs, clock synchronization, voltage conversion, and three user-selectable power supply voltages. Additionally, the device features a single power supply design and a common mode reference ground.

The LM1949N features an on-chip, self-diagnostics function, allowing the host system to detect whether the IMCT is functioning properly. The device can detect errors such as open circuit, individual wire shorts, and the presence of power on the DC input lines. The device also features an integrated reset circuit that can be synchronously disabled by the host system and a fail-safe input mode.

The LM1949N also offers many digital control features. The device has an inbuilt clock synchronization circuit that permits the device to synchronize with a variety of clock sources, including both external and internal clock sources. The device also supports a wide range of input logic levels, including TTL, CMOS, and ECL levels. Additionally, the device supports three levels of input voltage: 5V, 12V and 24V.

The LM1949N PMIC provides a complete, integrated solution for the control of IMCTs, with features such as input filtering, buffered outputs, synchronization, and user-selectable power supply voltages. Additionally, the device offers self-diagnostics, an integrated reset circuit, and support for a wide variety of logic levels. The device includes an advanced input filter to reduce EMI and is built on a single power supply design.

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