Document
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Features
• • • • • • • • • • • • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages Fully Specified Over Temperature Available in three Output Configurations Push-Pull RESET Low Output (AP1701/3) Push-Pull RESET High Output (AP1702/4) 200ms Min. Power-On Reset Pulse Width 20µA Supply Current (Typ.) Guaranteed Reset Valid to VCC = +1V Power Supply Transient Immunity No External Components Green Package: SC59-3L Lead Free Finish / RoHS Compliant (Note1)
General Description
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. 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 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
AP170X X X X X
Enable
1 2 3 4 : Active-Low : Active-High : Active-Low : Active-High
Voltage
A B C D E F G : 4.63 : 4.38 : 4.00 : 3.08 : 2.93 : 2.63 : 2.25
Package
W : SC59
Lead Free
L : Lead Free G : Green
Packing
-7 : Taping
Notes: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
AP170XXW
Package Packaging Code (Note 2)
W SC59
Quantity
7” Tape and Reel Part Number Suffix
-7
3000/Tape & Reel
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 9 www.diodes.com
FEBRUARY 2007
© Diodes Incorporated
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Pin Assignments
(Top View) (Top View)
GND
1 AP1701 AP1702 3 VCC
RESET (RESET)
1 AP1703 AP1704 3 VCC
RESET (RESET)
2
GND
2
SC59-3L Pin Descriptions
SC59-3L
Name GND RESET (RESET) VCC
Description Ground Reset Output Pin L: for AP1701/3 H: for AP1702/4 Operating Voltage Input
Absolute Maximum Ratings
Symbol VCC VRESET ICC IO PD TOP TST Parameter Terminal Voltage (with respect to GND) RESET, RESET (push-pull) Input Current, VCC Output Current, RESET, RESET Continuous Power Dissipation (TA = +70°C), de-rate 4mW/°C above +70°C Operating Junction Temperature Range Storage Temperature Range Rating -0.3 to +6.0 -0.3 to (VCC + 0.3) 20 20 320 -40 to +105 -65 to +150 Unit V V mA mA mW °C °C
AP1701/2/3/4 Rev. 2
2 of 9 www.diodes.com
FEBRUARY 2007
© Diodes Incorporated
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
Electrical Characteristics
Symbol Parameter VCC VCC Range ICC Supply Current
(TA = 25ºC)
VTH
TS TDELAY VOL VOH VOL VOH
Conditions TA = 0oC to +70oC VTH + 1.0V AP1701/2/3/4A AP1701/2/3/4B AP1701/2/3/4C Reset Threshold AP1701/2/3/4D TA = 25ºC AP1701/2/3/4E AP1701/2/3/4F AP1701/2/3/4G Reset Threshold Tempco Set-up Time VCC = 0 to (VTH – 100mV) Reset Active TA = 0oC to +70oC Timeout Period VCC = VTH min, ISINK = 1.2mA, AP1701/3 RESET Output V = V min, I CC TH SINK = 3.2mA Voltage Low VCC > 1.0V, ISINK = 50uA RESET Output VCC > VTH max, ISOURCE = 500uA, AP1701/3 VCC > VTH max, ISOURCE = 800uA Voltage-High RESET Output VCC = VTH max, ISINK = 1.2mA, AP1702/4 Voltage-Low VCC = VTH max, ISINK = 3.2mA RESET Output 1.8V < VCC < VTH min, ISOURCE = 150uA, Voltage-High AP1702/4
Min. 1.0 4.54 4.29 3.92 3.02 2.87 2.57 2.20
Typ. 20 4.63 4.38 4.00 3.08 2.93 2.63 2.25 30
Max. 5.5 30 4.72 4.47 4.08 3.14 2.99 2.68 2.30
Unit V µA
V
100 100 240 600 0.3 0.4 0.3 0.8VCC VCC –1.5 0.3 0.4 0.8 VCC
ppm/ o C µs ms V V V V
Typical Application Circuit
V CC Cin
0.1uF
V CC
V CC
AP170X
RESET (RESET)
Microprocessor
RESET INPUT
GND
GND
AP1701/2/3/4 Rev. 2
3 of 9 www.diodes.com
FEBRUARY 2007
© Diodes Incorporated
AP1701/2/3/4
3-PIN MICROPROCESSOR RESET CIRCUITS
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 th.