Document
AAT3510/1/2/3/4/5/6/7/8/9
Micropower µP Reset with Watchdog Timer General Description
The AAT351x PowerManager products are members of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. This family of microprocessor reset circuits provides the ultimate in versatility, allowing system designers full customization of the µP monitor and reset function without any additional components. The AAT351x family offers several combinations of threshold voltage, watchdog timeout period, reset active period, and output drive configurations, which are all factory-programmed options. All devices are available in 32 reset threshold voltages from 2.6V up to 5V, with three watchdog timeout periods from 6.3ms to 1600ms and three reset timeouts from 1ms up to 140ms. Available output configurations are active low push-pull, active low open drain, active low bi-directional, and active high push-pull. The AAT351x family is designed to ignore fast negative transients on VDD and to ensure that reset outputs remain valid down to 1V.
Features
• • • • • • •
™ PowerManager SmartSwitch™
• •
Tight Voltage Tolerance: ±1.5% Low Quiescent Current: 5µA Guaranteed Reset Valid Down to 1V 32 Voltage Options from 2.6V to 5.0V Three Reset Active Period Options: — 1ms, 20ms, 140ms Three Watchdog Timeout Period Options: — 6.3ms, 102ms, 1600ms Four Output Options: — Open Drain — Inverting — Non-Inverting — Bi-Directional Low Temperature Coefficient: 100ppm/°C 5-Pin SOT23 Package
Applications
Critical µP and µC Supply Monitoring Embedded Control Systems Industrial Controllers Intelligent Instruments Notebook Computers Portable Electronics Power-On Reset Circuits
• The AAT351x family is available in the Pb-free, www.DataSheet4U.com • space-saving 5-pin SOT23 surface mount package • and is specified over the -40 to +85°C temperature • range. • • •
Typical Application
V DD
VCC RESET (RESET) RESET INPUT
VDD
AAT351x
µP
I/O LINE
WDI GND
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Micropower µP Reset with Watchdog Timer Pin Descriptions
Pin #
AAT3510 AAT3512 AAT3513 AAT3511 AAT3514 AAT3517 AAT3518 1 N/A 1 AAT3515 AAT3516 AAT3519 1
Symbol
RESET
Function
AAT3510/13/15: RESET output goes low whenever VDD falls below the reset threshold. CMOS push-pull output. AAT3511/14/16: RESET output goes low whenever VDD falls below the reset threshold. Bidirectional CMOS pushpull output intended to interface directly to microprocessors with bi-directional resets. AAT3517/18/19: RESET output goes low whenever VDD falls below the reset threshold. Open drain output. Connect a pull-up resistor to any supply voltage up to 5.5V. Ground connection pin. RESET active-high output. This CMOS push-pull signal is the logical inverse of RESET. Manual reset input pin. Active low. Pull low to force a reset. Watchdog input pin. Triggers a reset if it remains in a steady state for the duration of the watchdog timer period. Input voltage pin.
2 N/A 3 4 5
2 1 3 4 5
2 3 N/A 4 5
2 3 4 N/A 5
GND RESET MR WDI VCC
Pin Configuration
5-lead SOT23 (Top View) RESET GND MR
1 5
5-lead SOT23 (Top View)
VCC RESET GND
1 5
VCC
2
2
3
4
WDI
MR
3
4
WDI
AAT3510 AAT3511 AAT3517
AAT3512
5-lead SOT23 (Top View) RESET GND RESET
1 5
5-lead SOT23 (Top View)
VCC RESET GND
1 5
VCC
2
2
3
4
WDI
RESET
3
4
MR
AAT3513 AAT3514 AAT3518
AAT3515 AAT3516 AAT3519
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Micropower µP Reset with Watchdog Timer Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted. Symbol
VCC VMR, VWDI VRESET IVCC, IMR, IWDI IRESET dVCC/dt TJ
Description
VCC to GND MR, WDI to GND RESET to GND (Push-Pull or Bidirectional Output) RESET to GND (Open Drain Output) Maximum Continuous Input Current RESET/RESET Output Current Rate of Rise of VCC Operating Junction Temperature Range (-40°C to +150°C)
Max
-0.3 to 6 -0.3 to VCC + 0.3 -0.3 to VCC + 0.3 -0.3 to 6 20 20 100 150
Units
V V V mA mA V/µs °C
Thermal Information2
Symbol
ΘJA PD
Description
Maximum Thermal Resistance Maximum Power Dissipation
Value
190 526
Units
°C/W mW
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 3510.2006.03.1.7
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AAT3510/1/2/3/4/5/6/7/8/9
Micropower µP Reset with Watchdog Timer Electrical Characteristics
VCC = 2.5V to 5.5V, TA = -40°C to +85°C1, unless otherwise noted. Typical values are at TA = 25°C. Symbol Description
VCC Operating Voltage Range
Conditions
TA = -40°C to +85°C AAT3510/1/2/3/4/7/8: MR & WDI Unconnected AAT3515/6/9: MR Unconnected TA = 25°C TA = -40 to +85°C -40°C < TA < +85°C AAT351xIGV-xx-A-x-T1 AAT351xIGV-xx-B-x-T1 AAT351xIGV-xx-C-x-T1 VCC Falling at 1mV/µs VCC ≥ 1.0V, ISINK = 50µA VCC ≥ 1.2V, ISINK = 100µA VCC ≥ 2.7V, ISINK = 1.2mA VCC ≥ 4.5V, ISINK = 3.2mA VCC ≥ 2.7V, ISOURCE = 500µA VCC ≥ 4.5V,.