ETC PCS810P

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
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where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of
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3-Pin µP Voltage Supervisor
Notice: The information in this document is subject to change without notice.
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