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In digital electronics, a level shifter, also called level converter or logic level shifter, or voltage level translator, is a circuit used to translate signals from one logic level or voltage domain to another, allowing compatibility between integrated circuits with different voltage requirements, such as TTL and CMOS.
A level shifter connects one digital circuit that uses one logic level to another digital circuit that uses another logic level. Often two level shifters are used, one at each system: A line driver converts from internal logic levels to standard interface line levels; a line receiver converts from interface levels to internal voltage levels.
2 voltage regulators: 5V-1A and 3.3V-800mA; I2C bus header, compatible with RTC breakouts modules such as DS1307 and DS3231; Internet connection via ESP8266 module (model ESP-01) Integrated 5v to 3.3v level shifter (IC 74HC4050) Digital ports D3, D4, D9, D10, D11 and D13 are available both in 5V and 3.3V
MAX232 chip in DIP-16 package The die of a MAX232 MAX232 pinout: Red: power, Yellow: charge pump capacitors, Blue: outputs, Green: inputs, Pins 9–12: TTL/CMOS I/O voltages. The MAX232 is an integrated circuit by Maxim Integrated Products, now a subsidiary of Analog Devices, that converts signals from a TIA-232 (RS-232) serial port to signals suitable for use in TTL-compatible digital logic ...
A common application for charge-pump circuits is in RS-232 level shifters, where they are used to derive positive and negative voltages (often +10 V and −10 V) from a single 5 V or 3 V power supply rail. Charge pumps can also be used as LCD or white-LED drivers, generating high bias voltages from a single low-voltage supply, such as a battery.
Haswell featured a FIVR.. Most voltage regulator module implementations are soldered onto the motherboard.Some processors, such as Intel Haswell and Ice Lake CPUs, feature some voltage regulation components on the same CPU package, reduce the VRM design of the motherboard; such a design brings certain levels of simplification to complex voltage regulation involving numerous CPU supply voltages ...
The 64K generation of DRAMs required a transition from 12V & +/−5V to 5V-only operation, in order to free the +12V and −5V pins for use as addresses (the +5V and ground pins were assigned to pins 8 and 16, respectively, rather than the 16-pin TTL DIP standard of pin 8 for ground and pin 16 for +5V).
Built on the PMOS process that was common in the early 1970s, the 5065 required three voltage supply levels, -12V (VGG), +5V(VSS), -5V (VDD) and ground. It was packaged in a 40-pin DIP, as was common for most processors of the era. The use of the multiplexed bus reduced pin use to the point that five pins were left unconnected. [10]