AP1701ASAL-7 [DIODES]
Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, ROHS COMPLIANT, SOT-23, 3-PIN;型号: | AP1701ASAL-7 |
厂家: | DIODES INCORPORATED |
描述: | Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, ROHS COMPLIANT, SOT-23, 3-PIN 光电二极管 |
文件: | 总10页 (文件大小:174K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
General Description
Features
The AP1701/2/3/4 are used for microprocessor (µP) supervisory
circuits to monitor the power supplies in µP and digital systems.
They provide excellent circuit reliability and low cost by
eliminating external components and adjustments when used
with +5V, +3.3V, +3.0V powered circuits.
•
Precision Monitoring of +2.5V, +3V, +3.3V, and +5V
Power-Supply Voltages
Fully Specified Over Temperature
Available in three Output Configurations
•
•
•
Push-PullRESET Low Output (AP1701/3)
These circuits perform a single function: they assert a reset
signal whenever the VCC supply voltage declines below a preset
threshold, keeping it asserted for at least 240ms after VCC has
risen above the reset threshold. Reset thresholds suitable for
operation with a variety of supply voltages are available. The
AP1701/2/3/4 have push pull outputs. The AP1701/3 have an
•
•
•
•
•
•
•
•
Push-Pull RESET High Output (AP1702/4)
200ms Min. Power-On Reset Pulse Width
20µA Supply Current (Typ.)
Guaranteed Reset Valid to V = +1V
CC
Power Supply Transient Immunity
No External Components
Green Packages: SC59-3L and SOT23
Lead Free Finish / RoHS Compliant (Note 1)
active low RESET output, while the AP1702/4 has an active
high RESET output. The reset comparator is designed to ignore
fast transients on VCC, and the outputs are guaranteed to be in
the correct logic state for VCC down to 1V. Low supply current
makes the AP1701/2/3/4 ideal for use in portable equipment. The
AP1701/2/3/4 is available in a 3-pin SC59 package.
Applications
•
•
•
•
•
•
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery Powered Equipment
Automotive
Ordering Information
X X X X X
AP170
Lead Free
Enable
Voltage
Package
Packing
-7 : Taping
A : 4.63
B : 4.38
C : 4.00
D : 3.08
E : 2.93
F : 2.63
G : 2.25
L : Lead Free
G : Green
1 : Active-Low
2 : Active-High
3 : Active-Low
4 : Active-High
W
SA
:
:
SC59
SOT23
Notes: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Package Packaging
7” Tape and Reel
Device
Code
W
(Note 2)
Quantity
Part Number Suffix
AP170XXW
AP170XXSA
SC59
3000/Tape & Reel
3000/Tape & Reel
-7
-7
SA
SOT23
Notes: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP1701/2/3/4 Rev. 2
1 of 10
JANUARY 2007
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Pin Assignments
(Top View)
(Top View)
1
2
1
GND
RESET (RESET)
AP1701
AP1702
AP1703
3 VCC
3 VCC
AP1704
GND
2
RESET (RESET)
SC59-3L
SC59-3L
3 REF
ANODE 1
2
CATHODE
SOT23
Pin Descriptions
Name
Description
GND
Ground
Reset Output Pin
RESET
(RESET)
VCC
L: for AP1701/3
H: for AP1702/4
Operating Voltage Input
AP1701/2/3/4 Rev. 2
2 of 10
JANUARY 2007
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Absolute Maximum Ratings
Symbol
VCC
Parameter
Rating
-0.3 to +6.0
-0.3 to (VCC + 0.3)
20
Unit
V
Terminal Voltage (with respect to GND)
VRESET
ICC
V
RESET, RESET (push-pull)
Input Current, VCC
mA
mA
IO
20
Output Current, RESET, RESET
Continuous Power Dissipation (TA = +70°C),
de-rate 4mW/°C above +70°C
PD
320
mW
TOP
TST
Operating Junction Temperature Range
Storage Temperature Range
-40 to +105
-65 to +150
°C
°C
Electrical Characteristics (TA = 25ºC)
Symbol
Parameter
VCC Range
Supply Current VTH + 1.0V
AP1701/2/3/4A
Conditions
Min.
Typ.
Max. Unit
VCC
ICC
TA = 0oC to +70oC
1.0
5.5
30
V
μA
20
4.54
4.29
3.92
3.02
2.87
2.57
2.20
4.63
4.38
4.00
3.08
2.93
2.63
2.25
4.72
4.47
4.08
3.14
2.99
2.68
2.30
AP1701/2/3/4B
AP1701/2/3/4C
AP1701/2/3/4D
AP1701/2/3/4E
AP1701/2/3/4F
AP1701/2/3/4G
Reset Threshold
TA = 25ºC
V
VTH
Reset Threshold
Tempco
ppm/
oC
30
TS
Set-up Time
Reset Active
Timeout Period
VCC = 0 to (VTH – 100mV)
TA = 0oC to +70oC
100
100
μs
TDELAY
240
600
ms
VCC = VTH min, ISINK = 1.2mA, AP1701/3
VCC = VTH min, ISINK = 3.2mA
VCC > 1.0V, ISINK = 50uA
0.3
0.4
0.3
RESET Output
Voltage Low
VOL
VOH
V
VCC > VTH max, ISOURCE = 500uA, AP1701/3
0.8VCC
RESET Output
Voltage-High
V
VCC > VTH max, ISOURCE = 800uA
VCC –1.5
RESET Output VCC = VTH max, ISINK = 1.2mA, AP1702/4
Voltage-Low
RESET Output 1.8V < VCC < VTH min, ISOURCE = 150uA,
Voltage-High AP1702/4
0.3
0.4
VOL
VOH
V
V
VCC = VTH max, ISINK = 3.2mA
0.8 VCC
AP1701/2/3/4 Rev. 2
3 of 10
JANUARY 2007
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Typical Application Circuit
VCC
Cin
0.1uF
VCC
VCC
Microprocessor
AP170X
RESET
INPUT
RESET
(RESET)
GND
GND
Function Description
A microprocessor’s (µP’s) reset input starts the µP in a
known state. The AP1701/2/3/4 assert reset to prevent
code-execution errors during power-up, power-down, or
brownout conditions. They assert a reset signal whenever the VCC
supply voltage declines below a preset threshold, keeping it
asserted for at least 240ms after VCC has risen above the reset
threshold. The AP1701/2/3/4 have a push-pull output stage.
below the reset threshold), RESET goes low. Any time VCC
goes below the reset threshold, the internal timer resets to zero,
and RESET goes low. The internal timer starts after VCC
returns above the reset threshold, and RESET remains low
for the reset timeout period.
Applications Information
Negative-Going VCC Transients
When VCC falls below 1V, the AP1701/3 RESET
output no longer sinks current—it becomes an open circuit.
Therefore, high-impedance CMOS logic inputs connected to
In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, the AP1701/2/3/4 are
relatively immune to short-duration negative-going VCC transients
(glitches).
RESET can drift to undetermined voltages.
This presents no problem in most applications since most µP and
other circuitry is inoperative with VCC below 1V. However, in
The AP1701/2/3/4 do not generate a reset pulse. The
graph was generated using a negative going pulse applied to VCC
starting 0.5V above the actual reset threshold and ending below it
by the magnitude indicated (reset comparator overdrive). The
graph indicates the maximum pulse width a negative going VCC
transient can have without causing a reset pulse. As the
magnitude of the transient increases (goes farther below the
reset threshold), the maximum allowable pulse width decreases.
Typically, a VCC transient that goes 100mV below the reset
threshold and lasts 100µs or less will not cause a reset pulse. A
0.1µF bypass capacitor mounted as close as possible to the VCC
pin provides additional transient immunity.
,
applications where RESET must be valid down to 0V, adding a
pull down resistor to RESET causes any stray leakage
currents to flow to ground, holding RESET low. R1’s value is
not critical; 100k are large enough not to load RESET and
small enough to pull RESET to ground. For the AP1702/4 if
RESET is required to remain valid for VCC < 1V.
Benefits of Highly Accurate Reset Threshold
Most µP supervisor ICs has reset threshold voltages
Ensuring a Valid Reset Output
Down to VCC = 0
between 5% and 10% below the value of nominal supply voltages.
This ensures a reset will not occur within 5% of the nominal
supply, but will occur when the supply is 10% below nominal.
When using ICs rated at only the nominal supply ±5%, this leaves
a zone of uncertainty where the supply is between 5% and 10%
low, and where the reset may or may not be asserted.
RESET is guaranteed to be a logic low for VCC > 1V.
Once VCC exceeds the reset threshold, an internal timer keeps
RESET low for the reset timeout period; after this interval,
RESET goes high. If a brownout condition occurs (VCC dips
RESET
AP1701/2/3/4 Rev. 2
4 of 10
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JANUARY 2007
© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Block Diagram
Driver
Delay Circuit
RESET
/ RESET
V
REF
Performance Characteristics
Threshold
2.928
24
20
16
2.926
2.924
2.922
Iq
12
8
4
2.92
-40
0
80 90
-30 -20 -10
0
10 20 30 40 50 60 70
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
Temp
Threshold vs. Temp
Temp ( C )
Iq vs. Temp
AP1701/2/3/4 Rev. 2
5 of 10
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NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Timing Diagram
VTH
VCC
TDELAY
TDELAY
Active Low
TS
Active High
TDELAY
TDELAY
Giltch Immunity
3500
3000
2500
2000
1500
1000
500
3000
900
270
140
90
70
58
50
50
48
48
0
0
100 200 300 400 500 600 700 800 900 1000 1100
RESET COMPARATOR OVERDRIVE(mV)
AP1701/2/3/4 Rev. 2
6 of 10
JANUARY 2007
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Marking Information
(1) SC59-3L
(Top View)
3
XX
Y
M
L
G
: Identification code
: Year 0-9
: Month A~L
: Lead Free Package
: Green Package
XX Y M X
1
2
(2) SOT23
(Top View)
XX Y M X
:
Year
Y
M
: Month (A~L)
Marking Code
X : L : Lead Free
G :Green
AP1701/2/3/4 Rev. 2
7 of 10
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Marking Information (Continued)
Device
Package (Note 3)
Identification Code
AP1701ASA
AP1701BSA
AP1701CSA
AP1701DSA
AP1701ESA
AP1701FSA
AP1701GSA
AP1702ASA
AP1702BSA
AP1702CSA
AP1702DSA
AP1702ESA
AP1702FSA
AP1702GSA
AP1703ASA
AP1703BSA
AP1703CSA
AP1703DSA
AP1703ESA
AP1703FSA
AP1703GSA
AP1704ASA
AP1704BSA
AP1704CSA
AP1704DSA
AP1704ESA
AP1704FSA
AP1704GSA
AP1701AW
AP1701BW
AP1701CW
AP1701DW
AP1701EW
AP1701FW
AP1701GW
AP1702AW
AP1702BW
AP1702CW
AP1702DW
AP1702EW
AP1702FW
AP1702GW
AP1703AW
AP1703BW
AP1703CW
AP1703DW
AP1703EW
AP1703FW
AP1703GW
AP1704AW
AP1704BW
AP1704CW
AP1704DW
AP1704EW
AP1704FW
AP1704GW
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
EA
EB
EC
ED
EE
EF
W1
E0
E2
E3
E4
E5
E6
W2
EG
EH
EI
SC59
SC59
SC59
SC59
SC59
SC59
SC59
SC59
EJ
EK
EL
W3
E7
E8
E9
EM
EN
EP
W4
SC59
SC59
SC59
Notes: 3. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
AP1701/2/3/4 Rev. 2
8 of 10
JANUARY 2007
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Package Information (All Dimensions in mm)
(1) Package Type: SC59-3L
0.35/0.50
2.70/
3.00
TOP VIEW
1.90
2.90/3.10
1.00/
1.30
0.10/0.20
0.013/0.10
0.95
0.35/0.55
0°/8°
(2) Package Type: SOT23
0.37/0.51
TOP VIEW
0.89/
1.03
1.80/2.00
0.45/0.60
2.80/3.00
0.085/0.180
0.013/
0.10
0.45/0.61
0º/8º
AP1701/2/3/4 Rev. 2
9 of 10
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JANUARY 2007
© Diodes Incorporated
NOT RECOMMENDED FOR NEW
DESIGN, USE (APX809/810)
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agreeto hold DiodesIncorporatedand all the companieswhose productsare represented onour website, harmlessagainst all damages.
LIFE SUPPORT
Diodes Incorporated productsare notauthorizedfor use ascriticalcomponentsin lifesupportdevices or systemswithout theexpressed written approval ofthe
PresidentofDiodesIncorporated.
AP1701/2/3/4 Rev. 2
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JANUARY 2007
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