HT7044A

HT70XX Voltage Detector Features · · · Low power consumption Low temperature coefficient Built-in high-stability reference source · · Built-in hysteresis characteristic TO-92 & SOT-89 package Applications · · · Battery checkers Level selectors Power failure detectors · · · Microcomputer reset Battery memory backup Non-volatile RAM signal storage protectors General Description The HT70XX series is a set of three-terminal low power voltage detectors implemented in CMOS technology. Each voltage detector in the series detects a particular fixed voltage ranging from 2.4V to 7V. The voltage detectors consist of a high-precision and low power consumption standard voltage source, a comparator, hysteresis circuit, and an output driver. CMOS technology ensures low power consumption. Although designed primarily as fixed voltage detectors, these devices can be used with external components to detect user specified threshold voltages (NMOS open drain type only). Selection Table Part No. HT7024A HT7027A HT7033A HT7039A HT7044A HT7050A HT7070A Detectable Voltage 2.4V 2.7V 3.3V 3.9V 4.4V 5V 7V Hysteresis Width 0.12V 0.135V 0.165V 0.195V 0.22V 0.25V 0.35V Tolerance ±5% ±5% ±5% ±5% ±5% ±5% ±5% Note: The output type selection codes are: NMOS open drain normal open, active low PMOS open drain normal open, active high For example: The HT7070A is a 7V, NMOS open drain active low output 1 May 3, 2000 HT70XX Output type selection table VDD Type VOUT A VDD>VDET(+) Hi-Z VDD£VDET(-) VSS B...