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January 2007 rev 0.2 3-Pin P Voltage Supervisor
PCS809/PCS810
FEATURES
* * * Ultra Low Supply Current 1A(typ.) Guaranteed Reset Valid to VCC=0.9V Available in three Output Types: Open Drain Active Low (PCS809N), Push-Pull Active Low (PCS809), Push-Pull Active High (PCS810) * * * * 140ms Min. Power-On Reset Pulse Width Internally Fixed Threshold 2.3V, 2.6V, 2.9V, 3.1V, 4.0V, 4.4V, and 4.6V Tight Voltage Threshold Tolerance: 1.5% Low profile Package: SOT-23-3
DESCRIPTION
PCS809/PCS810 are low-power microprocessor (P) supervisory circuits used to monitor power supplies in P and digital systems. They provide applications with benefits of circuit reliability and low cost by eliminating external components. These devices perform as valid singles in applications with VCC ranging from 6.0V down to 0.9V. The reset signal lasts for a minimum period of 140ms whenever VCC supply voltage falls below preset threshold. Both PCS809 and PCS810 were designed with a reset comparator to help identify invalid signals, which last less than 140ms. The only difference between them is that they have an active-low RESET output and active-high RESET output, respectively. Low supply current (1A) makes PCS809/PCS810 ideal
APPLICATIONS
* * * * Notebook Computers Digital Still Cameras PDAs Critical Microprocessor Monitoring
RESET THRESHOLD Suffix Voltage(V) L 4.6 M 4.4 J 4.0 T 3.1 S 2.9 R 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)
VCC
P
RESET INPUT
GND
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.
January 2007
PCS809/PCS810
rev 0.2
Pin Diagram
GND 1 PCS809 (PCS810) RESET (RESET) 2
3 VCC
Pin Description Pin#
PCS809 1 PCS810 1
Pin Name
GND Ground.
Description
RESET is asserted LOW if VCC falls below VTH. RESET remains LOW for atleast 2 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 2 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)
3
3
Block Diagrams
N-ch Open-Drain Type
RESET Reset Generator NMOS
VCC R1
Bandgap
R2 GND
Push-Pull Type
VCC R1 Bandgap Reset Generator RESET (RESET)
R2 GND
3-Pin P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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rev 0.2
Detailed Description
RESET OUTPUT P will be activated at a valid reset state. These P supervisory circuits assert reset to prevent code execution errors during power-up, power-down, or brownout BENEFITS THRESHOLD PCS809/810 with specified voltage as 5V10% or 3V10% are ideal for systems using a 5V5% or 3V5% power supply. The reset is guaranteed to assert after the power supply falls out of regulation, but before power drops below the minimum specified operating voltage range of the system ICs. The pre-trimmed thresholds are reducing the range over which an undesirable reset may occur. OF HIGHLY ACCURATE RESET conditions. RESET is guaranteed to be a logic low for VTH>VCC>0.9V. Once VCC exceeds the reset threshold, an internal timer keeps RESET low for the reset timeout period; after this interval, RESET goes high. If a brownout condition occurs (VCC drops below the reset threshold), RESET goes low. Any time VCC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer is activated after VCC returns above the reset threshold, and RESET remains low for the reset timeout period.
Application Information
NEGATIVE-GOING VCC TRANSIENTS In addition to issuing a reset to the P during power-up, power-down, and brownout conditions, PCS809 series are relatively resistant to short-duration negative-going VCC transient. ENSURING A VALID RESET OUTPUT DOWN TO VCC=0 When VCC falls below 0.9V, PCS809 RESET output no longer sinks current; it becomes an open circuit. In this case, high-impedance CMOS logic inputs connecting to RESET can drift to undetermined voltages. Therefore, PCS809/810 with CMOS is perfect for most applications of INTERFACING TO P WITH BIDIRECTIONAL RESET PINS The RESET output on the PCS809 is open drain, this device interfaces easily with Ps that have bidirectional reset pins. Connecting the P supervisor's RESET output directly to the microcontroller's RESET pin with a single pull-up resistor allows either device to assert reset. VCC below 0.9V. However in applications where RESET must be valid down to 0V, adding a pull-down resistor to RESET causes any leakage currents to flow to ground, holding RESET low.
3-Pin P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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PCS809/PCS810
rev 0.2
Absolute Maximum Rating Parameter
VCC RESET,RESET Input Current (VCC) Output Current (RESET or RESET) Continuous Power Dissipation (TA=+70C) Operating Junction Temperature Range Junction Temperature Storage Temperature Range Lead Temperature (Soldering) 10 sec -65 -40
Min
0.3 0.3
Max
6.5 Vcc+0.3 20 20 320 +85 125 150 260
Unit
V V mA mA mW C C C C
Test Circuit
VCC
TEST CIRCUIT VCC 0.1uF RESET (RESET)
GND
3-Pin P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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PCS809/PCS810
rev 0.2
Electrical Characteristics:
(Typical valves are at TA=+25C unless otherwise specified.) (Note1)
Parameter
Opreating Voltage Supply Current
Symbol
VCC ICC
Test Conditions
Min
0.9
Typ
Max
6
Unit
V
VCC= VTH +0.1V P device R device S device T device J device M device L device TA=+25C TA-40C to +85C TA=+25C TA-40C to +85C TA=+25C TA-40C to +85C TA=+25C TA-40C to +85C TA=+25C TA-40C to +85C TA=+25C TA-40C to +85C TA=+25C TA-40C to +85C 2.265 2.254 2.561 2.548 2.857 2.842 3.054 3.038 3.940 3.920 4.334 4.312 4.531 4.508
1 2.3 2.6 2.9 3.1 4.0 4.4 4.6 20 140 100 0.8VCC 230
3 2.335 2.346 2.639 2.652 2.944 2.958 3.147 3.162 4.060 4.080 4.466 4.488 4.669 4.692
A
RESET threshold
VTH
V
VCC to Reset Delay Reset Active Timeout Period RESET output Voltage
TRD TRP VOH VOL VOH VOL
VCC=VTH to (VTH-0.1V), VTH =3.1V VCC=VTH (MAX) TA=+25C TA-40C to +85C
S
560 1030 0.2VCC mS
VCC = VTH +0.1V,ISOURECE =1mA VCC = VTH -0.1V,ISINK =1mA VCC = VTH +0.1V,ISOURECE =1mA VCC = VTH -0.1V,ISINK =1mA
A
RESET output Voltage
0.8VCC 0.2VCC
V
Note1: Specifications are production tested at T =25C. Specifications over the -40C to 85C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). Note 2: RESET output is for PCS809: RESET output for PCS810.
3-Pin P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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PCS809/PCS810
rev 0.2
Ordering Information Part #
PCS809LIURF PCS809MIURF PCS809JIURF PCS809TIURF PCS809SIURF PCS809RIURF PCS809PIURF Threshold Voltage 4.6 4.4 4.0 3.1 2.9 2.6 2.3
Temperature Range
PCS809 Push-Pull type -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PCS809 N Open- Drain type
Package
3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23
Top Marking
RA46P RA44P RA40P RA31P RA29P RA26P RA23P
PCS809NLIURF PCS809NMIURF PCS809NJIURF PCS809NTIURF PCS809NSIURF PCS809NRIURF PCS809NPIURF
4.6 4.4 4.0 3.1 2.9 2.6 2.3 4.6 4.4 4.0 3.1 2.9 2.6 2.3
-40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PCS810 ACTIVE HIGH RESET
3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23
RB46P RB44P RB40P RB31P RB29P RB26P RB23P
PCS810LIURF PCS810MIURF PCS810JIURF PCS810TIURF PCS810SIURF PCS810RIURF PCS810PIURF
-40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C
3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23 3-SOT-23
RD46P RD44P RD40P RD31P RD29P RD26P 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 P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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rev 0.2
Package Information: 3- SOT23 Package
Dimensions Symbol
A A1 A2 b c D E E1 L L1 e e1
Inches Min Max
0.035 0.00 0.035 0.009 0.003 0.111 0.106 0.060 0.014 0.057 0.006 0.051 0.015 0.009 0.117 0.114 0.066 0.022
Millimeters Min Max
0.95 0.05 0.90 0.30 0.08 2.80 2.60 1.50 0.30 1.45 0.15 1.30 0.50 0.22 3.00 3.00 1.70 0.60
0.023 REF 0.0256 BSC 0.0768 BSC 0 8
0.60 REF 0.95 BSC 1.90 BSC 0 8
3-Pin P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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January 2007
PCS809/PCS810
rev 0.2
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 (c) PulseCore Semiconductor All Rights Reserved Part Number: PCS809/810 Document Version: 0.2
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued PulseCore Semiconductor, dated 11-11-2003
(c) 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 P Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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