HT7044A-1

TinyPower TM HT70xxA-1 Voltage Detector Features General Description • Low power consumption The HT70xxA-1 series devices area 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 2.2V to 5.0V. The voltage detectors consist of a high-precision and low power consumption standard voltage source as well as a comparator, hysteresis circuit, and an output driver. CMOS technology ensures low power consumption. • Low temperature coefficient • High input voltage range (up to 30V) • Quiescent current 3μA • Output voltage accuracy: tolerance ±3% • Built-in hysteresis characteristic • TO92, SOT89, SOT23 and SOT23-5 package Although designed primarily as fixed voltage detectors, these devices can be used with external components to detect user specified threshold voltages. Applications • Battery checkers • Level selectors • Power failure detectors • Microcomputer reset • Battery memory backup • Non-volatile RAM signal storage protectors Selection Table Part No. Detectable Voltage Hysteresis Width HT7022A-1 2.2V 0.110V HT7024A-1 2.4V 0.120V HT7027A-1 2.7V 0.135V HT7033A-1 3.3V 0.165V HT7039A-1 3.9V 0.195V HT7044A-1 4.4V 0.220V HT7050A-1 5.0V 0.250V Tolerance Package Marking ±3% TO92 SOT89 SOT23 SOT23-5 70xxA-1 (for TO92) 70xxA-1 (for SOT89) 0xxA (for SOT23) 0xxA (for SOT23-5) Note: ″xx″ stands for detectable voltages. Rev. 2.10 1 March 19, 2014 HT70xxA-1 Block Diagram N Channel Open Drain Output (Normal Open; Active Low)               Output Table & Curve V VDD VDD>VDET(+) VDD≤VDET(−) VOUT Hi-Z VSS O U T D a s h lin e ... V S o lid lin e ... V V V D E T V D E T V  1 .0 5 IN IN fro m L fro m H O I  H  L O I IN H Y S Pin Assignment                                                                                                                       Rev. 2.10       2 March 19, 2014 HT70xxA-1 Absolute Maximum Ratings Supply Voltage ....................................................VSS−0.3V to VSS+33V Power Consumption.................................................................. 200mW Output Voltage................................................... VSS−0.3V to VDD+0.3V Storage Temperature.................................................... −50°C to 125°C Output Current............................................................................. 50mA Operating Temperature.................................................. −40°C to 85°C Note: These are stress ratings only. Stresses exceeding the range specified under ″Absolute Maximum Ratings″ may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Electrical Characteristics HT7022A-1 Ta=25°C Symbol Parameter Test Conditions VDD Conditions Min. Typ. Max. Unit V VDET Detection Voltage — — 2.134 2.200 2.266 VHYS Hysteresis Width — — 0.02VDET 0.05VDET 0.10VDET V IDD Operating Current 3.2V — 3 6 µA VDD Operating Voltage 1.5 — 30 V IOL Output Sink Current 1 2 — mA — ±100 — ppm/°C              Temperature Coefficient No load — — VDET–0.2V VOUT=0.2V — -40°C