FM810TF [ETC]
Voltage Detector ; 电压检测器\n
| 型号： | FM810TF |
| 厂家： | 
ETC |
| 描述： | Voltage Detector
|
| 文件： | 总5页 (文件大小：54K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
August 2000
FM810
Precision Reset Generator Circuit
General Description
Features
The FM810 features comprehensive reset generation for micro-
controller/microprocessor based systems. If the system VCC volt-
age level is determined to be in an out-of-tolerance state, the
device automatically generates a high reset signal. The reset
signal is held in the active state (high) for a specified duration
(minimum 140 ms) after the VCC returns to a in-tolerance state.
I Automatic reset generation on power-up
I Minimum 140 ms reset pulse — compatible with other similar
810 class devices
I Other reset pulse choices available – 32 - 256 ms
I Choice of commercial and extended temperature ranges
I Choice of Reset Thresholds — 4.63V, 4.38V, 4.00V, 3.08V,
2.93V, 2.63V
The FM810 is fabricated using CMOS technology. The FM810 is
available in the SOT-23 package.
I Package available: SOT-23
Block Diagram
VCC
Reset_out
(active high)
VCC Tolerance Detect
& Reset Monitor
Output
Stage
Temp. Compensated
Reference
Connection Diagram
1
1 = GND
2 = RESET'
3 = VCC
FM810
3
2
1
© 2000 Fairchild Semiconductor International
FM810 Rev. A.1
www.fairchildsemi.com
Each FM810 device has the following Identifier (FM810yz) (Top Mark on devices will be 10yz)
Reset Characteristics
RESET THRESHOLD (V) Identifier(y) Fairchild Part Number
4.63
4.38
4.00
3.08
2.93
2.63
L
M
J
FM810Lz
FM810Mz
FM810Jz
FM810Tz
FM810Sz
FM810Rz
T
S
R
RESET PULSE DURATION (mS) Identifier(z) Fairchild Part Number
32
64
E
F
FM810yE*
FM810yF*
FM810yH*
FM810y
128
256
H
Blank
Note*: These choices are available upon special request only. Please work with Fairchild Marketing to determine availability.
2
www.fairchildsemi.com
FM810 Rev. A.1
Product Specifications
Absolute Maximum Ratings
Operating Conditions
Ambient Storage Temperature
–65°C to +150°C
Ambient Operating Temperature
Commercial
Industrial
0°C to +70°C
-40°C to +85°C
All Input or Output Voltages
with Respect to Ground
-0.3V to 6.5V
+300°C
Lead Temperature (Soldering, 10 seconds)
ESD Rating
2000V min.
Electrical Characteristics
Parameter
Symbol
Temp
Conditions
Min
1.0
Typ
Max Units
VCC Range
Com
5.5V
5.5
V
V
IND
ICC
1.2
Supply Current
Com
50
µA
µA
V
100
Reset Threshold
VTH
Com
Ind
‘L’ Identifier
‘M’ Identifier
‘J’ Identifier
‘T’ Identifier
‘S’ Identifier
‘R’ Identifier
4.50
4.40
4.25
4.16
3.89
3.80
3.00
2.92
2.85
2.78
2.55
2.50
0.8VCC
0.4
4.63
4.63
4.38
4.38
4.00
4.00
3.08
3.08
2.93
2.93
2.63
2.63
4.75
4.85
4.50
4.56
4.10
4.20
3.15
3.23
3.00
3.08
2.70
2.75
V
Com
Ind
V
V
Com
Ind
V
V
Com
Ind
V
V
Com
Ind
V
V
Com
Ind
V
V
nRESET Output Voltage High
nRESET Output Voltage Low
Reset Timeout Period
VOH
VOL
All
Isource = 150 mA
Isink = 1.2mA
V
All
V
TRST
All
175
240
375
ms
Note : Production testing done at TA = +25°C, over temperature limits guaranteed by design only.
General Description
Thisisnotaprobleminmostsystemssincemostcommondevices
are not functional in this range. If it is desired for the FM810 reset
to be functional below the range above, it is suggested to use a
The FM810 features a highly accurate voltage reference against
which the VCC is compared. Once the VCC is below the specified
threshold, it will drive the RESET line and continue to hold it high
tilltheVCC returnsabovethethresholdandthetimefortheRESET
pulse duration has expired. The FM810 is immune to short
negative going transients on the VCC line. The placement of a
0.1µF bypass capacitor as close as possible to the VCC pin
provides additional transient immunity.
100KΩ pull-down resistor between RESET and VSS
.
Interfacing to Bidirectional reset pins
FM810 can be used with microprocessors with bidirectional reset
pins.Inordertoallowthemicroprocessortodrivetheresetline,the
output of the FM810 must be connected to the microprocessor
through a 4.7kΩ resistor. This will ensure that the RESET line has
correct level at both the FM810 as well as the device end.
ForaVCC valuebelow1.0V-1.3V, theFM810doesnotsinkcurrent
on the RESET pin.
3
www.fairchildsemi.com
FM810 Rev. A.1
Typical Operating Characteristics
Supply Current Vs. Temperature (FM810R/S/T)
8
7
6
5
4
3
2
1
0
-60
-40
-20
0
20
40
60
80
100
Temperature (C)
Power up Reset Timeout Vs. Temperature FM810(R/S/T)
300
280
260
240
220
200
-60
-40
-20
0
20
40
60
80
100
Temperature (C)
Normalized Reset Threshold Vs. Temperature FM810(R/S/T)
1.050
1.025
1.000
0.975
0.950
-60
-40
-20
0
20
40
60
80
100
Temperature (C)
4
www.fairchildsemi.com
FM810 Rev. A.1
Physical Dimensions inches (millimeters) unless otherwise noted
0.40 0.03
0.03~0.10
0.38 REF
+0.05
–0.023
0.40 0.03
0.12
0.96~1.14
2.90 0.10
Dimensions in millimeters
0.95 0.03 0.95 0.03
1.90 0.03
0.508REF
SOT-23 Package Dimensions
FS Pkg Code AU
Life Support Policy
Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written
approval of the President of Fairchild Semiconductor Corporation. As used herein:
1. Life support devices or systems are devices or systems which,
(a)areintendedforsurgicalimplantintothebody,or(b)support
or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably ex-
pected to cause the failure of the life support device or system,
or to affect its safety or effectiveness.
Fairchild Semiconductor
Americas
Fairchild Semiconductor
Europe
Fairchild Semiconductor
Hong Kong
Fairchild Semiconductor
Japan Ltd.
Customer Response Center
Tel. 1-888-522-5372
Fax:
Tel:
Tel:
Tel:
Tel:
+44 (0) 1793-856858
8/F, Room 808, Empire Centre
68 Mody Road, Tsimshatsui East
Kowloon. Hong Kong
Tel; +852-2722-8338
Fax: +852-2722-8383
4F, Natsume Bldg.
Deutsch
English
Français
Italiano
+49 (0) 8141-6102-0
+44 (0) 1793-856856
+33 (0) 1-6930-3696
+39 (0) 2-249111-1
2-18-6, Yushima, Bunkyo-ku
Tokyo, 113-0034 Japan
Tel: 81-3-3818-8840
Fax: 81-3-3818-8841
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
5
www.fairchildsemi.com
FM810 Rev. A.1
相关型号：
©2020 ICPDF网 联系我们和版权申明