TCM809LVNBTR [MICROCHIP]
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, SOT-23B, 3 PIN;
| 型号： | TCM809LVNBTR |
| 厂家： | 
MICROCHIP |
| 描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, SOT-23B, 3 PIN 光电二极管 |
| 文件： | 总7页 (文件大小：50K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TCM809
TCM810
3-Pin Microprocessor Reset Monitors
FEATURES
GENERAL DESCRIPTION
ꢀ
Precision VCC Monitor for 3.0V, 3.3V, 5.0V
Nominal System V Supplies
140msec Guaranteed Minimum RESET, RESET
Output Duration
RESET Output Guaranteed to VCC = 1.0V (TCM809)
Low 17µA Supply Current
VCC Transient Immunity
Small 3-Pin SOT-23B Package
No External Components
The TCM809 and TCM810 are cost-effective system
supervisor circuits designed to monitor VCC in digital sys-
tems and provide a reset signal to the host processor when
necessary. No external components are required.
The reset output is driven active within 20µsec of VCC
falling through the reset voltage threshold. Reset is main-
tained active for a minimum of 140msec after VCC rises
above the reset threshold. The TCM810 has an active-high
RESET output while the TCM809 has an active-low RESET
output. The output of the TCM809 is guaranteed valid down
to VCC = 1V. Both devices are available in a 3-Pin SOT-23B
package.
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TYPICAL APPLICATIONS
The TCM809/810 are optimized to reject fast transient
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Computers
Embedded Systems
Battery Powered Equipment
Critical µP Power Supply Monitoring
glitches on the VCC line. Low supply current of 17µA (VCC
=
3.3V) makes these devices suitable for battery powered
applications.
ORDERING INFORMATION
TYPICAL OPERATING CIRCUIT
VCC
Part No.
Package
Temp. Range
3
TCM809xENB
TCM809xVNB
TCM810xENB
TCM810xVNB
3-Pin SOT-23B
3-Pin SOT-23B
3-Pin SOT-23B
3-Pin SOT-23B
– 40°C to +85°C
– 40°C to +125°C
– 40°C to +85°C
– 40°C to +125°C
VCC
VCC
PROCESSOR
2
RESET
INPUT
RESET
NOTE: The "X" denotes a suffix for VCC threshold - see table below.
TCM809
GND
GND
1
Suffix
Reset VCC Threshold (V)
L
M
J
4.63
4.38
4.00
3.08
2.93
2.63
T
S
R
PIN CONFIGURATION
*3-Pin SOT-23B
NOTE: J version is available for TCM809 only.
1
GND
V
TCM809xENB
TCM810xENB
3
CC
RESET**(RESET)
2
NOTE: *3-Pin SOT-23B is equivalent to JEDEC TO-236
** () is for TCM810
TCM809/810-4 7/26/00
© 2001 Microchip Technology Inc. DS21487A
3-Pin Microprocessor Reset Monitors
TCM809
TCM810
Power Dissipation (TA ≤ 70°C)
ABSOLUTE MAXIMUM RATINGS*
3-Pin SOT-23B (derate 4mW/°C above +70°C) 230mW
Storage Temperature Range ................ – 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +260°C
*This is a stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operational sections of
the specifications is not implied. Exposure to Absolute Maximum Rating
Conditions for extended periods may affect device reliability.
Supply Voltage (VCC to GND) ................................ +6.0V
RESET, RESET ............................ – 0.3V to (VCC + 0.3V)
Input Current, VCC.. ..................................................20mA
Output Current, RESET, RESET .............................20mA
dV/dt (VCC) ....................................................... 100V/µsec
Operating Temperature Range ............. – 40°C to +125°C
ELECTRICAL CHARACTERISTICS:
Vcc = Full Range, TA = Operating Temperature Range unless other-
wise noted. Typical values are at TA = +25°C, VCC = 5V for L/M/J, 3.3V forT/S, 3.0V for R (Note 1).
Symbol Parameter
Test Conditions
Min
Typ
Max
Unit
VCC Range
TA = 0°C to +70°C
TA = – 40°C to +125°C
1.0
1.2
—
—
5.5
5.5
V
ICC
Supply Current
TCM8xxL/M/J VCC < 5.5V
TCM8xxR/S/T: VCC < 3.6V
—
—
24
17
60
50
µA
VTH
Reset Threshold (Note 2)
TCM8xxL: TA = +25°C
TA = – 40°C to +125°C
TCM8xxM: TA = +25°C
TA = – 40°C to +125°C
TCM809J: TA = +25°C
TA = – 40°C to +125°C
TCM8xxT: TA = +25°C
TA = – 40°C to +125°C
TCM8xxS: TA = +25°C
TA = – 40°C to +125°C
TCM8xxR: TA = +25°C
TA = – 40°C to +125°C
4.56
4.50
4.31
4.25
3.93
3.89
3.04
3.00
2.89
2.85
2.59
2.55
4.63
—
4.38
—
4.00
—
3.08
—
2.93
—
2.63
—
4.70
4.75
4.45
4.50
4.06
4.10
3.11
3.15
2.96
3.00
2.66
2.70
V
Reset Threshold Tempco
VCC to Reset Delay (Note 2)
Reset Active Timeout Period
—
—
30
20
—
—
ppm/°C
µsec
msec
V
VCC = VTH to (VTH – 100mV)
140
240
560
VOL
RESET Output Voltage Low
(TCM809)
TCM809R/S/T: VCC = VTH min, ISINK = 1.2mA
TCM809L/M/J: VCC = VTH min, ISINK = 3.2mA
VCC > 1.0V, ISINK = 50µA
—
—
—
—
—
—
0.3
0.4
0.3
VOH
VOL
RESET Output Voltage High
(TCM809)
TCM809R/S/T: VCC > VTH max, ISOURCE = 500µA
0.8 VCC
—
—
—
—
V
V
V
TCM809L/M/J: VCC > VTH max, ISOURCE = 800µA VCC – 1.5
RESET Output Voltage Low
(TCM810)
T
T
CM810R/S/T: VCC = VTH max, ISINK = 1.2mA
CM810L/M/J: VCC = VTH max, ISINK = 3.2mA
—
—
—
—
0.3
0.4
VOH
RESET Output Voltage High
(TCM810)
1.8 < VCC < VTH min, ISOURCE = 150µA
0.8 VCC
—
—
NOTES:
1. Production testing done at TA = +25°C, over temperature limits guaranteed by design.
2. RESET output for TCM809, RESET Output for TCM810.
PIN DESCRIPTION
Pin No.
(3-Pin SOT-23B)
Symbol
Description
1
2
GND
Ground
RESET (TCM809)
RESET output remains low while VCC is below the reset voltage threshold, and
for 240msec (140msec min.) after VCC rises above reset threshold.
2
RESET (TCM810)
VCC
RESET output remains high while VCC is below the reset voltage threshold,
and for 240msec (140msec min.) after VCC rises above reset threshold.
3
Supply voltage (Typ. +3.0V to +5.0V)
© 2001 Microchip Technology Inc. DS21487A
TCM809/810-4 7/26/00
2
3-Pin Microprocessor Reset Monitors
TCM809
TCM810
valid to VCC = 0V, a pull-down resistor must be connected
fromRESETtogroundtodischarge straycapacitancesand
hold the output low (Figure 2). This resistor value, though
not critical, should be chosen such that it does not apprecia-
bly load RESET under normal operation (100kΩ will be
suitableformostapplications).Similarly,apull-upresistorto
VCC is required for the TCM810 to ensure a valid high
RESET for VCC below 1.0V.
APPLICATIONS INFORMATION
VCC Transient Rejection
The TCM809/810 provides accurate VCC monitoring
and reset timing during power-up, power-down, and brown-
out/sag conditions, and rejects negative-going transients
(glitches) on the power supply line. Figure 1 shows the
maximum transient duration vs. maximum negative excur-
sion (overdrive) for glitch rejection. Any combination of
duration and overdrive which lies under the curve will not
generate a reset signal. Combinations above the curve are
detectedasabrownoutorpower-down. Transientimmunity
can be improved by adding a capacitor in close proximity to
the VCC pin of the TCM809/810.
VCC
VCC
TCM809
RESET
V
CC
R1
100k
V
TH
GND
Overdrive
Figure 2. Ensuring RESET Valid to VCC = 0V
Duration
400
T
= +25°C
A
Processors With Bidirectional I/O Pins
Some µP's (such as Motorola 68HC11) have bi-direc-
tional reset pins. Depending on the current drive capability
of the processor pin, an indeterminate logic level may result
if there is a logic conflict. This can be avoided by adding a
4.7kΩ resistor in series with the output of the TCM809/810
(Figure 3). If there are other components in the system
which require a reset signal, they should be buffered so as
not to load the reset line. If the other components are
required to follow the reset I/O of the µP, the buffer should
be connected as shown with the solid line.
320
240
160
TCM8XXL/M/J
100
80
0
TCM8XXR/S/T
5
1
1000
RESET COMPARATOR OVERDRIVE,
BUFFERED RESET
TO OTHER SYSTEM
COMPONENTS
BUFFER
[
V
- V (mV)
]
TH
CC
VCC
Figure 1. Maximum Transient Duration vs.
VCC
µP
RESET
VCC
Overdrive for Glitch Rejection at 25°C
TCM809
4.7k
RESET Signal Integrity During Power-Down
RESET
The TCM809 RESET output is valid to VCC = 1.0V.
Below this voltage the output becomes an "open circuit" and
does not sink current. This means CMOS logic inputs to the
µP will be floating at an undetermined voltage. Most digital
systems are completely shutdown well above this voltage.
However, in situations where RESET must be maintained
© 2001 Microchip Technology Inc. DS21487A
GND
GND
Figure 3. Interfacing to Bidirectional Reset I/O
TCM809/810-4
7/26/00
3
3-Pin Microprocessor Reset Monitors
TCM809
TCM810
TYPICAL CHARACTERISTICS
Supply Current vs.Temperature
(No Load, TCM8xxR/S/T)
Supply Current vs.Temperature
(No Load, TCM8xxL/M/J)
30
35
30
V
= 5V
= 3V
CC
V
= 5V
= 3V
CC
25
20
15
25
20
15
10
5
V
V
CC
CC
10
V
= 1V
5
0
CC
V
= 1V
CC
0
40
TEMPERATURE (°C)
–40 –20
60
–40 –20
40
60
80
100
80
100
0
20
0
20
125
125
TEMPERATURE (°C)
Power-Down Reset Delay vs. Temperature
(TCM8xxR/S/T)
Power-Down Reset Delay vs. Temperature
(TCM8xxL/M/J)
100
80
140
120
100
80
V
V
= VTH – V
= 10mV
OD
OD
CC
V
V
= V
– V
TH CC
OD
OD
= 10mV
60
V
= 20mV
OD
V
= 20mV
OD
60
40
40
V
= 100mV
20
0
V
= 100mV
OD
OD
20
0
V
= 200mV
100
V
= 200mV
OD
80
OD
–40 –20
40
60
–40
–20
40
60
80
100
0
20
0
20
125
125
TEMPERATURE (°C)
TEMPERATURE (°C)
Normalized Reset Threshold vs. Temperature
Power-Up Reset Timeout vs. Temperature
1.003
1.002
1.001
250
245
240
235
TCM8xxL/M/J
TCM8xxR/S/T
1.000
0.999
230
225
0.998
0.997
80
125
40
TEMPERATURE (°C)
60
100
20
–40 –20
0
60
TEMPERATURE (°C)
80
0
–40
–20
40
100
20
125
© 2001 Microchip Technology Inc. DS21487A
TCM809/810-4 7/26/00
4
3-Pin Microprocessor Reset Monitors
TCM809
TCM810
MARKING
3-Pin SOT-23B
TCM810
Code
TCM810LENB
TCM810MENB
TCM810TENB
TCM810SENB
TCM810RENB
TCM810LVNB
TCM810MVNB
TCM810TVNB
TCM810SVNB
TCM810RVNB
K1
K2
K3
K4
K5
KZ
KY
KX
KV
KU
Part Numbers and Part Marking
ꢀ
&
ꢁ = part number code + temperature range
(two-digit code).
TCM809
Code
J
1
ex: M809LENB = ꢂꢂꢂꢂ
ꢃ represents year and quarter code
ꢄ represents lot ID number
TCM809LENB
TCM809MENB
TCM809TENB
TCM809SENB
TCM809RENB
TCM809JENB
TCM809LVNB
TCM809MVNB
TCM809TVNB
TCM809SVNB
TCM809RVNB
TCM809JVNB
J1
J2
J3
J4
J5
J6
JZ
JY
JX
JV
JU
JT
TAPING FORM
Component Taping Orientation for 3-Pin SOT-23B (JEDEC TO-236) Devices
User Direction of Feed
Device
Marking
W
PIN 1
P
Standard Reel Component Orientation
For TR Suffix Device
(Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
3-Pin SOT-23B
8 mm
4 mm
3000
7 in
© 2001 Microchip Technology Inc. DS21487A
TCM809/810-4
7/26/00
5
3-Pin Microprocessor Reset Monitors
TCM809
TCM810
PACKAGE DIMENSIONS
3-Pin SOT-23B (JEDEC TO-236)
.021 (0.54)
.015 (0.37)
.055 (1.40)
.047 (1.20)
.103 (2.64)
.083 (2.10)
.024 (0.60)
.017 (0.44)
.120 (3.05)
.105 (2.67)
.040 (1.02)
.031 (0.79)
.007 (0.18)
.003 (0.085)
8° MAX.
.004 (0.10) .080 (2.05)
.010 (0.25)
.005 (0.13)
.001(0.02)
.070 (1.78)
Dimensions: inches (mm)
© 2001 Microchip Technology Inc. DS21487A
TCM809/810-4 7/26/00
6
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ASIA/PACIFIC (continued)
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01/09/01
All rights reserved. © 2001 Microchip Technology Incorporated. Printed in the USA. 1/01
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© 2001 Microchip Technology Incorporated. Printed in the USA. 1/01
© 2001 Microchip Technology Inc. DS21487A
TCM809/810-4 7/26/00
相关型号：
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MICROCHIP
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