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PDF TCM811 Data sheet ( Hoja de datos )
| Número de pieza | TCM811 | |
| Descripción | 4-Pin Microcontroller Reset Monitors | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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M TCM811/TCM812
4-Pin Microcontroller Reset Monitors
Features
• Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
5.0V Nominal Supplies
• Manual Reset Input
• 140 msec Minimum RESET Output Duration
• RESET Output Valid to VDD = 1.0V (TCM811)
• Low 6 µA (typ.) Supply Current
• VDD Transient Immunity
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower
Threshold Voltage Option
• Push-Pull RESET Output
• Temperature Range:
- Commercial (C) -40°C to +85°C
Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microcontroller Power Supply Monitoring
Typical Application Circuit
VDD
0.1µF
4
VDD
TCM811
3 MR
PUSH
BUTTON
RESET 2
GND
VDD
PIC
Microcontroller
RESET
INPUT
(Active Low)
GND
General Description
The TCM811 and TCM812 are cost effective system
supervisory circuits designed to monitor VDD in digital
systems and provide a reset signal to the host control-
ler when necessary. A manual reset input is provided
to override the reset monitor and is suitable for use as
a push-button reset. No external components are
required.
The reset output is driven active within 20 µsec (5 µsec
for F version) of VDD falling through the reset voltage
threshold. RESET is maintained active for a minimum
of 140 msec after VDD rises above the reset threshold.
The TCM812 has an active high RESET output while
the TCM811 has an active low RESET output. The out-
put of the TCM811 is valid down to VDD = 1V. Both
devices are available in a 4-Pin SOT-143 package,
specified with a temperature range of -40°C to +85°C.
The TCM811/TCM812 are optimized to reject fast tran-
sient glitches on the VDD line. A low supply current of
6 µA (VDD = 3.3V) makes these devices ideal for battery
powered applications.
Package Types:
SOT-143
GND 1
4 VDD
TCM811 RESET
TCM812 (RESET)
2
3 MR
2002 Microchip Technology Inc.
DS21615B-page 1
1 page  
TCM811/TCM812
3.0 TYPICAL PERFORMANCE CHARACTERISTICS
Note:
The graphs provided following this note are a statistical summary based on a limited number of samples
and are provided for informational purposes only. The performance characteristics listed herein are not
tested or guaranteed. In some graphs, the data presented may be outside the specified operating range
(e.g., outside specified power supply range) and therefore outside the warranted range.
14
TCM81xR/S/T/F
12 No Load
10
8 VDD = 5V
6 VDD = 3V
4
VDD = 1V
2
0
–40 –20
0 20 40
TEMPERATURE (˚C)
60
FIGURE 3-1: Supply Current vs. Temperature.
85
50
TCM81xF
40
30
VOD = 20 mV
20
10
0 VOD = 200 mV
–40 –20
VOD = 100 mV
0 20 40
TEMPERATURE (˚C)
60
FIGURE 3-2: Power-Down Reset Delay
Temperature.
85
vs.
250
245
TCM81xL/M
240
235 TCM81xR/S/T/F
230
225
–40
–20
0 20 40
TEMPERATURE (˚C)
60
FIGURE 3-3: Power-Up Reset Timeout
Temperature.
85
vs.
8
TCM81xL/M
No Load
6
VDD = 5V
4
VDD = 3V
2
VDD = 1V
0
–40 –20
0 20 40
TEMPERATURE (˚C)
60
FIGURE 3-4: Supply Current vs. Temperature.
85
50
VOD = 20 mV
40 VOD = 100 mV
VOD = 200 mV
30
20
10
0
–40 –20
TCM81xL/M
0 20 40
TEMPERATURE (˚C)
60 85
FIGURE 3-5: Power-Down Reset Delay vs.
Temperature.
50
TCM81x/R/S/T
40
30
20 VOD = 200 mV
VOD = 100 mV VOD = 20 mV
10
0
–40 –20
0 20 40
TEMPERATURE (˚C)
60
FIGURE 3-6: Power-Down Reset Delay
Temperature.
85
vs.
2002 Microchip Technology Inc.
DS21615B-page 5
5 Page 
TCM811/TCM812
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
X
X
Device
VDD
Reset
Threshold
Temperature
Range
XXXX
Package
Device:
TCM811: Supervisor Circuit with active-low RESET output
TCM812: Supervisor Circuit with active-high RESET output
Examples:
a) TCM811LERCTR: SOT-143, Microcontroller
4.63V Reset Monitor, -40°C to +85°C, Tape and
Reel.
b) TCM811MERCTR: SOT-143, Microcontroller
4.38V Reset Monitor, -40°C to +85°C, Tape and
Reel.
VDD Reset Threshold: L
M
T
S
R
F
= 4.63V
= 4.38V
= 3.08V
= 2.93V
= 2.63V
= 1.75V
Temperature Range: E = -40°C to +85°C
a) TCM812FERCTR: SOT-143, Microcontroller
1.75V Reset Monitor, -40°C to +85°C, Tape
and Reel.
b) TCM812SERCTR: SOT-143, Microcontroller
2.93V Reset Monitor, -40°C to +125°C, Tape
and Reel.
Package:
RCTR = SOT-143, 4-pin (Tape and Reel)
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3. The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.
DS21615B-page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TCM811.PDF ] | |
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