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Número de pieza | CAT8836 | |
Descripción | NanoPower Supervisory Circuit | |
Fabricantes | ON Semiconductor | |
Logotipo | ||
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No Preview Available ! CAT8836
NanoPower Supervisory
Circuit
Description
The CAT8836 is a voltage supervisory circuit intended to provide
circuit initialization and start−up timing for DSPs and other
processor−based systems.
When system power comes on, CAT8836’s output once the supply
voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory
circuit monitors VDD and keeps the output active as long as VDD
remains below the threshold voltage of VTH. After VDD exceeds the
monitoring threshold an internal timer delays the return of the output
to the inactive state (high) to ensure proper system reset.
The duration of this reset delay is controlled by the CT input. When
CT is connected to GND the reset delay is 10 ms, typical, in duration
and when connected to VDD, the delay time is typically 200 ms.
Whenever the supply voltage drops below the monitoring threshold
voltage VTH, the output becomes active (low) again.
Features
• Supply Current: 220 nA (typical)
• Precision Supply Voltage Supervision Range: 1.8 V, 2.5 V, 3.0 V, and
3.3 V
• Power−On Reset Generator with Selectable Delay Time: 10 ms or
200 ms
• Push/Pull RESET (active low) Output
• Manual Reset Input
• Pin−for−Pin Replacement for TPS3836
• TSOT23−5 Package
• Temperature Range: −40°C to +85°C
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
• Applications Using Low−Power DSPs, Microcontrollers, or
Microprocessors
• Portable− and Battery−Powered Equipment
• Intelligent Instruments
• Wireless Communication Systems
• Automotive Systems
• Notebook Computers
http://onsemi.com
TSOT−23
TD SUFFIX
CASE 419AE
PIN CONNECTIONS
1
CT VDD
GND
MR RESET
(Top View)
MARKING DIAGRAM
UTYM
UT = Device Code
Y = Production Year (Last Digit)
M = Production Month: 1−9 (Jan − Sep),
= O, N, D (Oct − Dec)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
January, 2011 − Rev. 0
1
Publication Order Number:
CAT8836/D
1 page CAT8836
TYPICAL CHARACTERISTICS
240
220
200
180
160
140 90°C
25°C
120 −40°C
100
1.5 2.5 3.5 4.5 5.5
VCC (V)
Figure 4. Supply Current vs. Supply Voltage
1.0005
1.0000
0.9995
0.9990
0.9985
0.9980
0.9975
0.9970
0.9965
−40 25 90
TEMPERATURE (°C)
Figure 5. Normalized Reset Threshold Voltage
vs. Temperature
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
1.5
90°C
25°C
−40°C
2.5 3.5
4.5
5.5
VCC (V)
Figure 6. Reset Time Out vs. VCC (CT = 0 V)
Detailed Description
The supervisory circuit monitors VDD and keeps the
RESET output active as long as VDD remains below the
threshold voltage of VTH. An internal timer delays the return
200
195
190
185
180
175
170 90°C
25°C
165 −40°C
160
1.5 2.5 3.5 4.5 5.5
VCC (V)
Figure 7. Reset Time Out vs. VCC (CT = 5 V)
of the output to the inactive state (high) to ensure proper
system reset. The delay time starts after VDD has risen above
the threshold.
http://onsemi.com
5
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet CAT8836.PDF ] |
Número de pieza | Descripción | Fabricantes |
CAT8836 | NanoPower Supervisory Circuit | ON Semiconductor |
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