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MPQ6411 Rev. 1.1 www.MonolithicPower.com 1 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. The Future of Analog IC Technology
DESCRIPTION
The MPQ6411 is a windowed watchdog timer. It is used to reset and monitor the microcontroller. In normal operation, the MCU sends a trigger signal to the MPQ6411 in a defined time window cyclically. A missing or fault trigger signal causes the watchdog to reset the MCU. The MPQ6411 provides a reset signal (low- level voltage) to the MCU during power-up or under voltage. Its power supply (VCC) has 5V and 3.3V options. By setting MODE to high or low, the watchdog operates in long window mode or short window mode; the window is programmable. The MPQ6411 is available in SOIC8 package.
FEATURES
Windowed Watchdog Power-On Reset during Power-Up and Under Voltage Programmable Short Window Mode or Long Window Mode Watchdog Disable Function Low Shutdown Mode Current SOIC8 Package Available in AEC-Q100 Grade 1
APPLICATIONS
Automotive Systems Industrial Systems All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status , please visit the MPS website unde r Quality Assurance. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 2 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking MPQ6411GS SOIC-8 See Below MPQ6411GS-AEC1 SOIC-8 MPQ6411GS-33 SOIC-8 MPQ6411GS-33-AEC1 SOIC-8 * For Tape & Reel, add suffix –Z (e.g. MPQ6411GS–Z); ** Pre-release TOP MARKING MP6411: Product code of MPQ6411GS and MPQ6411GS-AEC1 LLLLLLLL: Lot number MPS: MPS prefix Y: Year code WW: Week code TOP MARKING M6411-33: Product code of MPQ6411GS-33 and MPQ6411GS-33-AEC1 LLLLLLLL: Lot number MPS: MPS prefix Y: Year code WW: Week code
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 3 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. PACKAGE REFERENCE VCC NC /WD_DIS TIMERWDI WDO MODE GND TOPVIEW ABSOLUTE MAXIMUM RATINGS (1) Continuous power dissipation (TA = +25°C) (2) Storage temperature………….. -65°C to +150°C Recommended Operating Conditions Supply voltage (VCC) Operating junction temp. (T Thermal Resistance (3) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature T J (MAX), the junction-to- ambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D (MAX) = (T J (MAX)-TA)/θJA. Exceeding the maximum allowable powe r dissipation will cause an excessive die temperature, causing the regulator to go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) Measured on JESD51-7, 4-layer PCB.
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 4 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VCC = 5V for MPQ6411, VCC = 3.3V for MPQ6411-33, TJ = - 40C to +125C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Power Supply Timer voltage RTIMER = 51k 0.3 V Quiescent current I Q MPQ6411, RTIMER = 100k 16 19 µA MPQ6411-33, RTIMER = 100k 10 14 MPQ6411, RTIMER = 51k 25 32 µA MPQ6411-33, RTIMER = 51k 14 18 Power on reset threshold VPOR-HIGH MPQ6411, WDO goes high with rising VCC 4.4 4.6 4.8 V MPQ6411-33, WDO goes high with rising VCC 2.9 3 3.1 VPOR-LOW MPQ6411, WDO goes low with falling VCC 4.3 4.5 4.7 V MPQ6411-33, WDO goes low with falling VCC 2.8 2.9 3 Timing Single period T R TIMER = 51k -10% 880 +10% µs Power on delay(4) t 0 RTIMER = 51k 10 cycle Sync signal monitoring time(4) t1 R TIMER = 51k 450 cycle Watchdog window close time (short mode)(4) t2 RTIMER = 51k, MODE = low 15 cycle Watchdog window open time (short mode) (4) t3 R TIMER = 51k, MODE = low 10 cycle Watchdog window close time (long mode) (4) t4 RTIMER = 51k, MODE = high 1500 cycle Watchdog window open time (long mode) (4) t5 R TIMER = 51k, MODE = high 1000 cycle WDO reset pulse width(4) t6 RTIMER = 51k 4 cycle WDI_OK pulse width 10 5000 μs Input and Output WDI logic high MPQ6411 3.2 V MPQ6411-33 2.1 WDI logic low MPQ6411 0.8 V MPQ6411-33 0.6 MODE logic high MPQ6411 3.2 V MPQ6411-33 2.1 MODE logic low MPQ6411 0.8 V MPQ6411-33 0.6
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 5 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS (continued) VCC = 5V for MPQ6411, VCC = 3.3V for MPQ6411-33, TJ = - 40C to +125C, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units MODE input Current MPQ6411, MODE = 5V 0.1 1 μA MPQ6411-33, MODE = 3.3V MPQ6411, MODE = 0V 5 8 μA MPQ6411-33, MODE = 0V 3.3 6 /WD_DIS logic high MPQ6411 3.2 V MPQ6411-33 2.1 /WD_DIS logic low MPQ6411 0.8 V MPQ6411-33 0.6 /WD_DIS input Current MPQ6411, WD_DIS = 5V 0.1 1 μA MPQ6411-33, WD_DIS = 3.3V MPQ6411, WD_DIS = 0V 5 8 μA MPQ6411-33, WD_DIS = 0V 3.3 6 WDO high MPQ6411, VCC = 5V, IWDO = 1mA VCC-0.2 V MPQ6411-33, VCC=3.3V,RPull-Up=100K 3.29 WDO low MPQ6411, VCC = 5V, IWDO = 1mA 0.2 V MPQ6411, VCC = 1V, IWDO = 300µA 0.1 MPQ6411-33, Sink 1mA Current 0.1 Notes: 4) Derived from bench characteri zation. Not tested in production.
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 6 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TYPICAL CHARATERISTICS VCC=5V for MPQ6411, VCC=3.3V for MPQ6411-33, unless otherwise noted. Quiescent Current vs. Junction Temperature MPQ6411, RTIMER=100k Single Period vs. Junction Temperature RTIMER=51k Quiescent Current vs. Junction Temperature MPQ6411, RTIMER=51k 25.0 25.5 26.0 26.5 27.0 27.5 28.0 28.5 -50 -25 0 25 50 75 100 125 16.0 16.2 16.4 16.6 16.8 17.0 -50 -25 0 25 50 75 100 125 850 860 870 880 890 900 910 -50 -25 0 25 50 75 100 125 1000 2000 3000 4000 5000 6000 7000 8000 0 100 200 300 400 500 Quiescent Current vs. Junction Temerature MPQ6411-33, RTIMER=51k -50 -25 0 25 50 75 100 125 Quiescent Current vs. Junction Temerature MPQ6411-33, RTIMER=100k -50 -25 0 25 50 75 100 125 12.0 14.0 16.0 18.0 8.0 9.0 10.0 11.0
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 7 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. PIN FUNCTION Pin # Name Description
1 WDO
Watchdog output. WDO outputs a reset signal to the MCU. MPQ6411 WDO is the output of a inverter, it is not must to connect WDO to VCC or another voltage source through a resistor. MPQ6411-33 WDO is the open drain of a MOSFET and should be connected to VCC or another voltage source through a resistor (e.g.100kΩ). 2 WDI Watchdog input. WDI receives the trigger signal from the MCU.
3 MODE
Mode switching pin. Pull MODE high to make the watchdog operate in long window mode; pull MODE low to make it work in short window mode. MODE has a weak internal pull-up. 4 GND Ground. 5 NC Not connected. 6 VCC Power input. 7 TIMER Watchdog timer pin. TIMER sets t he time-out with an external resistor 8 /WD_DIS Watchdog disable pin. Pull /WD_DIS low to disable the watchdog; pull /WD_DIS high to enable the watchdog. It has a weak internal pull-up.
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 8 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. FUNCTIONAL BLOCK DIAGRAM Figure 1: Functional Block Diagram
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 9 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TIMING DIAGRAM Power-on reset and no sync signal Synchronized by WDI and triggered in open window (MODE=0, short window mode) VCC WDO WDI WDI_OK t2 t3 WDI_OK MODE 0 Synchronized by WDI and no trigger signal (MODE=0, short window mode)
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 10 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. Synchronized by WDI and triggered in closed window (MODE=0, short window mode) VCC WDO WDI WDI_OK MODE 0 WDI_OK Note: When the WDI_OK rising edge that comes at WDO is low, the t6 timer will be reset. Therefore, in the situation above, the WDO reset signal maintains a t6+WDI_OK time. Synchronized by WDI and triggered in open window (MODE=1, long window mode) Synchronized by WDI and no trigger signal (MODE=1, long window mode)
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 11 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. Synchronized by WDI and triggered in closed window (MODE=1, long window mode) Note: When the WDI_OK rising edge that comes at WDO is low, the t6 timer will be reset. Therefore, in the situation above, the WDO reset signal maintains a t6+WDI_OK time.
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 12 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. STATE DIAGRAM WDO reset state Sync signal monitoring state time-out t0 Short window close state Long window close state Short window open state Long window open state WDI_OK & MODE=0 time-out t2 WDI_OK WDI_OK time-out t4 MODE=1 MODE=1 MODE=0 MODE=0 WDO reset pulse state time-out t3 time-out t5 time-out t6 WDI=0 time-out t1 WDI=0 WDI_OK & MODE=1 Note: The state diagram above does not include if a WDI error occurs.
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE MPQ6411 Rev. 1.1 www.MonolithicPower.com 13 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. OPERATION Supply Voltage VCC= 5V10% is recommended for MPQ6411 /MPQ6411-AEC1 normal operation; while VCC= 3.3V 10% is recommended for MPQ6411-33/MPQ6411-33-AEC1 normal operation. WDO is pulled low when VCC rises to 1V or above. After VCC rises to 90% (typically), WDO will remain at a low level for t to reset the MCU. TIMER Period T (s): RTIMER (k): For example: RTIMER=51kΩ, T0.88ms Monitor MCU Synchronization Signal When the watchdog is in a “sync signal monitoring state,” the following will occur: If the watchdog IC receives a WDI_OK signal from the MCU within t 1 (WDI remains low for 10µs to 5ms), the timer will be reset, and the watchdog works in normal operation. If the watchdog does not receive the WDI_OK signal from the MCU during t 1, it will generate a reset signal and go into “sync signal monitor state” again. Short Window Mode If the MCU and watchdog are synchronized correctly and MODE is low, the watchdog will work in short window mode: If WDI_OK is received in a window close state (t 2), the watchdog outputs a reset signal and goes into a sync signal monitoring state. If WDI_OK is received in a window open state (t 3), the watchdog goes into a window close state. The MCU works in normal operation in this situation. If no WDI_OK signal is received in t 2+t3, the watchdog outputs a reset signal and goes into a sync signal monitoring state. If MODE is pulled high during short window mode, the watchdog will go into long window mode. Long Window Mode If the MCU and watchdog are synchronized correctly and MODE is high, the watchdog will operate in long window mode, and the following will occur: If WDI_OK is received in a window close state (t 4), the watchdog outputs a reset signal and goes into a sync signal monitoring state. If WDI_OK is received in a window open state (t 5), the watchdog goes into a window close state. The MCU works in normal operation in this situation. If no WDI_OK signal is received in t 4+t5, the watchdog outputs a reset signal and goes into a sync signal monitoring state. If MODE is pulled low during a long window mode, the watchdog will go into a short window mode. Watchdog Disable Pull /WD_DIS low to disable the watchdog; pull it high to enable the watchdog. /WD_DIS has a weak internal pull-up, so the watchdog is enabled if /WD_DIS is left open. WDI Error If a WDI signal remains at a low level for longer than the maximum WDI_OK pulse width, it is regarded as an error. When this error occurs, WDO is pulled down until WDI returns to a high level.
MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE NOTICE: The information in this document is subject to change wi thout notice. Users should warra nt and guarantee that third party Intellectual Property rights are not infringed upon w hen integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MPQ6411 Rev. 1.1 www.MonolithicPower.com 14 6/16/2017 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
PACKAGE INFORMATION
0.016(0.41) 0.050(1.27)0o-8o DETAIL "A" 0.010(0.25) 0.020(0.50) x 45o SEE DETAIL "A" 0.0075(0.19) 0.0098(0.25) 0.150(3.80) 0.157(4.00)PIN 1 ID 0.050(1.27) BSC 0.013(0.33) 0.020(0.51) SEATING PLANE 0.004(0.10) 0.010(0.25) 0.189(4.80) 0.197(5.00) 0.053(1.35) 0.069(1.75) TOP VIEW FRONT VIEW 0.228(5.80) 0.244(6.20) SIDE VIEW RECOMMENDED LAND PATTERN 0.213(5.40) 0.063(1.60) NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA. 6) DRAWING IS NOT TO SCALE. 0.010(0.25) BSC GAUGE PLANE