MIC1815-20U TR Micrel Inc, MIC1815-20U TR Datasheet

IC RESET CIRCUIT 2.55V SOT23-3

MIC1815-20U TR

Manufacturer Part Number
MIC1815-20U TR
Description
IC RESET CIRCUIT 2.55V SOT23-3
Manufacturer
Micrel Inc
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of MIC1815-20U TR

Number Of Voltages Monitored
1
Reset
Active Low
Reset Timeout
100 ms Minimum
Voltage - Threshold
2.55V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-3, TO-236-3, Micro3™, SSD3, SST3
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Output
-
Other names
MIC1815-20UTR
MIC1815-20UTR
General Description
The MIC1815 is an inexpensive microprocessor supervisory
circuit that monitors power supplies in microprocessor based
systems.
The function of these devices is to assert a reset if the power
supply drops below a designated reset threshold level. Several
different reset threshold levels are available to accommodate
10% or 20% drop in 3.3V powered systems.
The MIC1815 has an active low /RESET output. The reset
output is guaranteed to remain asserted for a minimum of
100ms after V
old level. The MIC1815 comes in a 3-pin SOT-23 package.
Typical Application
July 2005
MIC1815
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 474-1000 • fax + 1 (408) 944-0970 • http://www.micrel.com
CC
has risen above the designated reset thresh-
Ordering Information
Part Number
MIC1815-10U
MIC1815-20U
MIC1815-10UY
MIC1815-20UY
Marking
ND
ND
NE
NE
MIC1815
V CC
RESET
Threshold
Voltage
2.88V
2.55V
2.88V
2.55V
V CC
1
Features
• Precision voltage monitor for 10% or 20% drop in 3.3V
• /RESET remains valid with V
• 5µA supply current
• 100ms minimum reset pulse width
• No external components required
• Available in 3-pin SOT-23 package
Applications
• Portable equipment
• Intelligent instruments
• Critical microprocessor power monitoring
• Printers/computers
• Embedded controllers
RESET
power supplies
Operating Temp. Range
V CC
µP
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Microprocessor Reset Circuit
MIC1815
CC
Package
SOT-23
SOT-23
SOT-23
SOT-23
as low as 1V
Pb-Free
Yes
Yes
MIC1815
No
No
Micrel

Related parts for MIC1815-20U TR

MIC1815-20U TR Summary of contents

Page 1

... Several different reset threshold levels are available to accommodate 10% or 20% drop in 3.3V powered systems. The MIC1815 has an active low /RESET output. The reset output is guaranteed to remain asserted for a minimum of 100ms after V has risen above the designated reset thresh- CC old level ...

Page 2

... Pin Configuration Pin Description Pin Number Pin Name 1 /RESET 2 VCC 3 GND MIC1815 RESET 1 MIC1815 3 GND 3-Lead SOT23 Pin Function /RESET goes low if V falls below the reset threshold and remains as- CC serted for one reset timeout period (100ms min) after V threshold. ...

Page 3

... Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Timing Diagram V CC /RESET July 2005 Operating Ratings (Note 1) Operating Temperature Range MIC1815-10U ......................................... –40°C to +85°C MIC1815-20U ......................................... –40°C to +85°C Power Dissipation (T ≤ +85°C; unless noted A Condition T = –40°C to +85°C A ...

Page 4

... MIC1815 Functional Diagram V (2) CC Threshold (V MIC1815 RESET GENERATOR Reset ) TH GND (3) 4 Micrel RESET (1) July 2005 ...

Page 5

... V as 1V. V Transients CC The MIC1815 is relatively immune to negative-going V glitches below the reset threshold. Typically, a negative-going transient 125mV below the reset threshold with a duration of 20µs or less will not cause an unwanted reset. July 2005 /RESET Valid at Low Voltage ...

Page 6

... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify MIC1815 ���� ������� ...

Related keywords