LESHAN RADIO COMPANY, LTD. LR8808 Micropocessor Reset Circuits General Description The LR8808 series are ultar-low current voltage detectors,which can be used to monitor the power supplies in microprocessor and digital systems. There are two output forms,and Nch open-drain and CMOS output are available. The LR8808 series are available SOT23(-3 -5) package.Performance is specified for -40℃to +85℃ temperature range. Features ★0.95V to 8V input range ★Reset Threshold:1.5V～6.0V in 0.1V increments ★High-precision detection voltage: ±2.0 % ★Ultra-low current consumption: 1.0μ[email protected](typ) ★SOT23-3 SOT23-5 package ★NMOS Open Drain and CMOS Output (Active Low) ★40℃ to +85℃ junction temperature range for operation Applications ★Battery-Powered Systems ★Power Supply Monitoring ★Handheld and Portable Equipment ★Processor Supervisor Reset Typical Application Circuit Block Diagram(*1: parasitic diode) 1/6 LESHAN RADIO COMPANY, LTD. LR8808 Pin Descriptions SOT23 SOT23-5 Pin No A M R 1 2 3 4 5 Gnd Vout Vcc － － Vout Gnd Vcc － － Vout Vcc Gnd No connection No connection Connection Diagrams SOT23 package SOT23-5 package Ordering Information The package type,the detector threshold,the output type and the taping type of LR8808 series can be designated at user’s request as following: CODE SYMBOL DESCRIPTION a 1.5~6.0 Detect Voltage b C CMOS Output N Nch open drain Output A/M Package:SOT23 R Package:SOT23-5 c Absolute Maximum Ratings VIN VOUT Junction Temperature Storage Temperature Power Dissipation Gnd to Gnd +10V Gnd to Gnd +10V −40°C to +85°C −40°C to +125°C SOT23 250mW Operating Ratings VIN VOUT Junction Temperature Junction-to-Ambient Thermal Resistance (θJA) 0.95V to 8V 0 to VIN −40°C to +85°C SOT23 301°C /W SOT23-5 220°C /W 2/6 LESHAN RADIO COMPANY, LTD. LR8808 Electrical Characteristics Unless otherwise specified,Typical values and limits appearing in standard typeface are for Ta = 25°C. Symbol −VDET (Figure1) VHYS (Figure1) Iss Vcc IOUT ILEAK TPLH Item Detection voltage Hysteresis Width Current Consumption Operating voltage Output Current Leakage current Temperature coefficient Conditions Min −VDET（S） ×0.98 － Type −VDET（S） Max Unit −VDET（S） ×1.02 V −VDET（S） −VDET（S） −VDET（S） － LR8808－2.0～2.6 C/N LR8808－2.6～3.9 C/N LR8808－3.9～6.0 C/N VCC = −VDET+0.5V － LR8808－2.0～2.6 NMOS: C/N VOUT=0.5V LR8808－2.6～3.9 Vcc=−VDET−0.5 C/N LR8808－3.9～6.0 C/N LR8808－2.0～2.6 PMOS: C/N Vcc−VOUT=0.5V LR8808－2.6～3.9 Vcc=−VDET+0.5 C/N LR8808－3.9～6.0 C/N Only for NMOS open-drain output products, VCC =8.0 V, VOUT =8.0 V Ta=−40°C to +85°C Delay time ×0.02 ×0.05 ×0.08 V － 1.0 2.0 µA － 1.2 2.5 µA － 1.5 3.0 µA 0.95 － 8 V 3.0 13.0 － mA 3.0 15.0 － mA 3.0 18.0 － mA 1.5 4.0 － mA 1.5 6.0 － mA 1.5 8.0 － mA － 0.1 µA ±120 ±360 ppm/ °C µs － 200 Figure1 3/6 LESHAN RADIO COMPANY, LTD. LR8808 Making Information DN159 LR8808-1.5 DN169 LR8808-1.6 DN179 LR8808-1.7 DN189 LR8808-1.8 DN199 LR8808-1.9 DN209 LR8808-2.0 DN219 LR8808-2.1 DN229 LR8808-2.2 DN239 LR8808-2.3 DN249 LR8808-2.4 DN259 LR8808-2.5 DN269 LR8808-2.6 DN279 LR8808-2.7 DN289 LR8808-2.8 DN299 LR8808-2.9 DN309 LR8808-3.0 DN319 LR8808-3.1 DN329 LR8808-3.2 DN339 LR8808-3.3 DN349 LR8808-3.4 DN359 LR8808-3.5 DN369 LR8808-3.6 DN379 LR8808-3.7 DN389 DN399 DN409 DN419 DN429 DN439 DN449 DN459 DN469 DN479 DN489 DN499 DN509 DN519 DN529 DN539 DN549 DN559 DN569 DN579 DN589 DN599 DN609 LR8808-3.8 LR8808-3.9 LR8808-4.0 LR8808-4.1 LR8808-4.2 LR8808-4.3 LR8808-4.4 LR8808-4.5 LR8808-4.6 LR8808-4.7 LR8808-4.8 LR8808-4.9 LR8808-5.0 LR8808-5.1 LR8808-5.2 LR8808-5.3 LR8808-5.4 LR8808-5.5 LR8808-5.6 LR8808-5.7 LR8808-5.8 LR8808-5.9 LR8808-6.0 4/6 LESHAN RADIO COMPANY, LTD. LR8808 Physical Dimensions 5/6 LESHAN RADIO COMPANY, LTD. LR8808 6/6