PCS809/PCS810 January 2007 rev 0.1 3-Pin µP Voltage Supervisor DESCRIPTION FEATURES • Ultra Low Supply Current 1µA(typ.) PCS809/PCS810 are low-power microprocessor (µP) • Guaranteed Reset Valid to VCC=0.9V supervisory circuits used to monitor power supplies in µP • • • Available in three Output Types: Open Drain and digital systems. They provide applications with Active Low (PCS809N), Push-Pull Active Low benefits of circuit reliability and low cost by eliminating (PCS809), Push-Pull Active High (PCS810) external components. 140ms Min. Power-On Reset Pulse Width Internally Fixed Threshold 2.3V, 2.6V, 2.9V, These devices perform as valid singles in applications with 3.1V, 4.0V, 4.4V, and 4.6V VCC ranging from 6.0V down to 0.9V. The reset signal • Tight Voltage Threshold Tolerance: 1.5% lasts for a minimum period of 140ms whenever VCC • Low profile Package: SOT-23-3 supply voltage falls below preset threshold. Both PCS809 and PCS810 were designed with a reset comparator to APPLICATIONS help identify invalid signals, which last less than 140ms. • Notebook Computers The only difference between them is that they have an • Digital Still Cameras active-low RESET output and active-high RESET output, • PDAs respectively. • Critical Microprocessor Monitoring Low supply current (1µA) makes PCS809/PCS810 ideal RESET THRESHOLD Suffix Voltage(V) L 4.6 M 4.4 J 4.0 T 3.1 S 2.9 Q 2.6 P 2.3 for portable equipment. The devices are available in 3SOT-23 package Typical Operating Circuit VCC VCC PCS809 PCS810 RESET (RESET) GND VCC µP RESET INPUT GND Push-Pull Output PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018 www.pulsecoresemi.com Notice: The information in this document is subject to change without notice. PCS809/PCS810 January 2007 rev 0.1 Pin Diagram GND 1 PCS809 PCS810 3 VCC RESET (RESET) 2 Pin Description Pin# PCS809 PCS810 1 1 2 - - 2 3 3 Pin Name Description Ground. GND RESET is asserted LOW if VCC falls below VTH. RESET remains LOW for atleast RESET 140ms (TRST) once VCC exceeds the Threshold. In addition, RESET is active LOW RESET is asserted HIGH if VCC falls below VTH. RESET remains HIGH for atleast RESET VCC 140ms (TRST) once VCC exceeds the threshold. In addition, RESET is active HIGH Power supply input voltage (3.0V, 3.3V, 5.0V) Block Diagrams N-ch Open-Drain Type RESET Bandgap VCC Reset Generator R1 NMOS R2 GND Push-Pull Type Bandgap VCC R1 Reset Generator RESET (RESET) R2 GND 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 2 of 8 PCS809/PCS810 January 2007 rev 0.1 Detailed Description RESET OUTPUT returns above the reset threshold, and RESET remains µP will be activated at a valid reset state. These µP low for the reset timeout period. supervisory circuits assert reset to prevent code execution errors during power-up, power-down, or brownout BENEFITS OF HIGHLY ACCURATE RESET conditions. THRESHOLD RESET is guaranteed to be a logic low for VTH>VCC>0.9V. Once VCC exceeds the reset threshold, 3V±10% are ideal for systems using a 5V±5% or 3V±5% an internal timer keeps RESET low for the reset timeout power supply. The reset is guaranteed to assert after the period; after this interval, RESET goes high. power supply falls out of regulation, but before power If a brownout condition occurs (VCC drops below the reset drops below the minimum specified operating voltage threshold), RESET goes low. Any time VCC goes below range of the system ICs. The pre-trimmed thresholds are the reset threshold, the internal timer resets to zero, and reducing the range over which an undesirable reset may RESET goes low. The internal timer is activated after VCC occur. PCS809/810 with specified voltage as 5V±10% or Application Information NEGATIVE-GOING VCC TRANSIENTS VCC below 0.9V. However in applications where RESET In addition to issuing a reset to the µP during power-up, must be valid down to 0V, adding a pull-down resistor to power-down, and brownout conditions, PCS809 series are RESET causes any leakage currents to flow to ground, relatively resistant to short-duration negative-going VCC holding RESET low. transient. ENSURING A VALID RESET OUTPUT DOWN TO INTERFACING TO µP WITH BIDIRECTIONAL RESET VCC=0 PINS When VCC falls below 0.9V, PCS809 RESET output no The RESET output on the PCS809 is open drain, this longer sinks current; it becomes an open circuit. In this device interfaces easily with µPs that have bidirectional case, high-impedance CMOS logic inputs connecting to reset pins. Connecting the µP supervisor’s RESET output RESET can drift to undetermined voltages. Therefore, directly to the microcontroller’s RESET pin with a single PCS809/810 with CMOS is perfect for most applications of pull-up resistor allows either device to assert reset. 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 3 of 8 PCS809/PCS810 January 2007 rev 0.1 Absolute Maximum Rating Parameter Min Max Unit VCC 0.3 6.5 V RESET,RESET 0.3 Vcc+0.3 V Input Current (VCC,MR) 20 mA Output Current (RESET or RESET) 20 mA 320 mW Continuous Power Dissipation (TA=+70) -40 Operating Junction Temperature Range Junction Temperature -65 Storage Temperature Range Lead Temperature (Soldering) 10 sec +85 °C 125 °C 150 °C 260 °C Test Circuit TEST CIRCUIT VCC VCC 0.1uF RESET (RESET) GND 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 4 of 8 PCS809/PCS810 January 2007 rev 0.1 Electrical Characteristics: (Typical valves are at TA=+25°C unless otherwise specified.) (Note1) Parameter Opreating Voltage Supply Current Symbol Test Conditions VCC ICC VCC= VTH +0.1V Q device S device VTH T device J device M device L device TA=+25°C 2.265 TA-40°C to 85°C 2.254 TA=+25°C 2.561 TA-40°C to 85°C 2.548 TA=+25°C 2.857 TA-40°C to 85°C 2.842 TA=+25°C 3.054 TA-40°C to 85°C 3.038 TA=+25°C 3.940 TA-40°C to 85°C 3.920 TA=+25°C 4.334 TA-40°C to 85°C 4.312 TA=+25°C 4.531 TA-40°C to 85°C 4.508 VCC to Reset Delay TRD VCC=VTH to (VTH-0.1V), VTH =3.1V Reset Active Timeout Period TRP VCC=VTH (MAX) RESET output Voltage VOH VCC = VTH +0.1V,ISOURECE =1mA VOL VCC = VTH -0.1V,ISINK =1mA VOH VCC = VTH +0.1V,ISOURECE =1mA VOL VCC = VTH -0.1V,ISINK =1mA RESET output Voltage Typ Max Unit 6 V 1 3 μA 2.3 2.335 0.9 P device RESET threshold Min 2.346 2.6 2.639 2.652 2.9 2.944 2.958 3.1 3.147 V 3.162 4.0 4.060 4.080 4.4 4.466 4.488 4.6 4.669 4.692 μS 20 TA=+25°C 140 TA-40°C to 85°C 100 230 560 mS 1030 0.8VCC 0.2VCC 0.8VCC V 0.2VCC Note1: Specifications are production tested at T =25°C. Specifications over the -40°C to 85°C operating temperature range are assured A by design, characterization and correlation with Statistical Quality Controls (SQC). Note 2: RESET output is for PCS809: RESET output for PCS810. 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 5 of 8 PCS809/PCS810 January 2007 rev 0.1 Ordering Information Part # Threshold Voltage Temperature Range Package Top Marking 3-SOT-23 3-SOT-23 RA46P RA44P PCS809 Push-Pull type PCS809LIURF PCS809MIURF 4.6 4.4 -40°C to 85°C -40°C to 85°C PCS809JIURF 4.0 -40°C to 85°C 3-SOT-23 RA40P PCS809TIURF 3.1 -40°C to 85°C 3-SOT-23 RA31P PCS809SIURF 2.9 -40°C to 85°C 3-SOT-23 RA29P PCS809QIURF 2.6 -40°C to 85°C 3-SOT-23 RA26P PCS809PIURF 2.3 -40°C to 85°C 3-SOT-23 RA23P 3-SOT-23 3-SOT-23 RB46P RB44P PCS809 N Open- Drain type PCS809NLIURF PCS809NMIURF 4.6 4.4 -40°C to 85°C -40°C to 85°C PCS809NJIURF 4.0 -40°C to 85°C 3-SOT-23 RB40P PCS809NTIURF 3.1 -40°C to 85°C 3-SOT-23 RB31P PCS809NSIURF 2.9 -40°C to 85°C 3-SOT-23 RB29P PCS809NQIURF 2.6 -40°C to 85°C 3-SOT-23 RB26P PCS809NPIURF 2.3 -40°C to 85°C 3-SOT-23 RB23P 3-SOT-23 3-SOT-23 RD46P RD44P PCS810 ACTIVE HIGH RESET PCS810LIURF PCS810MIURF 4.6 4.4 -40°C to 85°C -40°C to 85°C PCS810JIURF 4.0 -40°C to 85°C 3-SOT-23 RD40P PCS810TIURF 3.1 -40°C to 85°C 3-SOT-23 RD31P PCS810SIURF 2.9 -40°C to 85°C 3-SOT-23 RD29P PCS810QIURF 2.6 -40°C to 85°C 3-SOT-23 RD26P PCS810PIURF 2.3 -40°C to 85°C 3-SOT-23 RD23P Note: For parts to be packed in tape and reel, add “T” at the end of the part number PulseCore Semiconductor parts are RoHS Compliant. All parts are lead free by default. 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 6 of 8 PCS809/PCS810 January 2007 rev 0.1 Package Information: 3- SOT23 Package Dimensions Symbol A Inches Min Max Millimeters Min Max 0.030 0.046 0.75 1.17 A1 0.002 0.006 0.05 0.15 B 0.012 0.020 0.30 0.50 C 0.003 0.008 0.08 0.20 D 0.110 0.120 2.80 3.04 E 0.047 0.055 1.20 1.40 e H e1 0.037 BSC 0.083 0.104 0.95 BSC 2.10 0.075 BSC 2.64 1.9 BSC L 0.016 0.024 0.40 0.60 θ 0o 8o 0o 8o S NA NA 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 7 of 8 PCS809/PCS810 January 2007 rev 0.1 Pre PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Copyright © PulseCore Semiconductor All Rights Reserved Part Number: PCS809/810 Document Version: 0.1 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued PulseCore Semiconductor, dated 11-11-2003 © Copyright 2007 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies. PulseCore reserves the right to make changes to this document and its products at any time without notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents PulseCore’s best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in PulseCore’s Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are made exclusively according to PulseCore’s Terms and Conditions of Sale. The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use. 3-Pin µP Voltage Supervisor Notice: The information in this document is subject to change without notice. 8 of 8