PCS811 Datasheet, PDF (1/8 Pages) PulseCore Semiconductor – 5-Pin μP Voltage Supervisor with Manual Reset

January 2007
rev 0.1
PCS811/PCS812
5-Pin µP Voltage Supervisor with Manual Reset
FEATURES
• Ultra Low Supply Current 1µA(typ.)
• Guaranteed Reset Valid to VCC=0.9V
• Available in two Output Types: Push-Pull
Active Low (PCS811), Push-Pull Active High
(PCS812)
• 140ms Min. Power-On Reset Pulse Width
• Internally Fixed Threshold 2.3V, 2.6V, 2.7V,
2.9V, 3.1V, 4.0V, 4.4V, and 4.6V
• Tight Voltage Threshold Tolerance: 1.5%
• Low profile Package: SOT-23-5
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
Q
2.7
R
2.6
P
2.3
DESCRIPTION
PCS811/PCS812 are low-power microprocessor (µP)
supervisory circuits used to monitor power supplies in µP
and digital systems. They provide applications with
benefits of circuit reliability and low cost by eliminating
external components. PCS811/PCS812 also offer a
manual reset input.
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 PCS811
and PCS812 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 (1µA) makes PCS811/PCS812 ideal
for portable equipment. The devices are available in 5-
SOT-23 package
Typical Operating Circuit
VCC
VCC
PCS811
(PCS812)
RESET
(RESET)
MR
GND
VCC
µP
RESET
INPUT
GND
Pushbutton
Switch
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: [phone] • Fax: [phone]
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.