PDF UT01VS33L Data sheet ( Hoja de datos )

Número de pieza	UT01VS33L
Descripción	Voltage Supervisor
Fabricantes	Aeroflex Circuit Technology
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No Preview Available ! Standard Products UT01VS33L Voltage Supervisor Data Sheet July 28, 2014 www.aeroflex.com/voltsupv FEATURES  3.15V to 3.6V Operating voltage range  Power supply (VDD) monitor set by the internal voltage reference at 3.08V  Precision Input Voltage Monitor using an internal 0.6V voltage reference  Watchdog Timer Circuit monitoring activity on WDI input - Nominal timeout 1.6s  RESET output responding to the VDD monitor and the manual reset input MR - Nominal RESET pulse width 200ms  RESET level valid for VDD>=1.2V  Operating Temperature Range -55oC to +125oC  Low Power, Typical 400uA  Operational environment: - Total dose: 300 krad(Si) - SEL Immune: <110 MeV-cm2/mg @125oC - SET Immune: <80 MeV-cm2/mg  Packaging options: - 8-lead dual-in-line flatpack  Standard Microelectronics Drawing 5962-11213 - QML Q and V INTRODUCTION The UT01VS33L’s function is to monitor vital supply and signal voltages in microprocessor systems. It provides for safe reset during power up, power down and brownout conditions by using an internal precision voltage reference. The UT01VS33L monitors activity at an independent watchdog input by employing an internal timer and a watchdog output that goes low if the input is not toggled within 1.6s. It provides for precision voltage threshold detection on an independent voltage input which could be used for battery or supply-low monitoring of a supply voltage other than VDD. The UT01VS33L includes an active low manual reset with a push- pull output. APPLICATIONS  Voltage Supervisor function for various systems including microprocessors, microcontrollers, DSPs and FPGAs  Critical battery and power supply monitoring  Replacement of older discrete solutions to improve reliability, accuracy and reduce complexity of the systems MR RESET & DIGITAL CONTROL VDD + ‐ WDI TIMER 3.08 V GND 0.6 V VREF WDI TRANSITION DETECTOR OSC ‐ PFI + WDO RESET WDI PFO Figure 1. UT01VS33L Functional Block Diagram 1 1 page ELECTRICAL CHARACTERISTICS 1,2 (VDD = 3.15V to 3.6V: -55°C < TC < +125°C) SYMBOL PARAMETER CONDITION Power Supply IDD VDD supply current VDD=3.6V Digital Inputs and Outputs (MR, RESET, WDI, WDO, PFO) VIL_WDI Digital input low VDD=3.15V VIH_WDI Digital input high VDD=3.6V VIL_MR Manual reset input low VDD=3.15V VIH_MR Manual reset input high VDD=3.6V VOL_WDO Digital output low VDD=3.15V, ISINK= 500A VOL_RESET RESET digital output low VDD=3.15V, ISINK=1.2mA VOL_PFO PFO digital output low VDD=3.15V, ISINK=1.2mA VOH3 Digital output high VDD=3.15V, ISOURCE =500A Timing and Threshold Voltages tRST-ASSRT4 VDD falling reset assertion VDD < 3.0V tRS Reset pulse width VDD=3.15V tWD Watchdog time-out period VDD=3.6V tWP Watchdog input pulse width VDD=3.15V VRT Reset threshold voltage VDD=3.15V VRTHYS Reset threshold voltage hysteresis tMR Manual reset (MR) input pulse VDD=3.15V width tMD Manual reset (MR) to reset out VDD=3.15V delay Analog Input PFI IPFI4 Threshold detector input (PFI) current VDD=3.6V VPFI Threshold detector input (PFI) VDD=3.3V threshold voltage IMR Manual reset pull-up current VDD=3.6V, MR=0.0V tRPFI PFI rising threshold crossing to PFO delay tFPFI PFI falling threshold crossing to PFO delay IWDI Watchdog input current WDI pin = VDD = 3.6V WDI pin = 0V, VDD = 3.6V MIN MAX UNIT 450 A 0.7xVDD 0.7xVDD 0.8xVDD 0.6 0.6 0.3 0.3 0.3 V V V V V V V 0.7 1.8 s 140 280 ms 1.0 2.25 s 100 ns 3.0 3.15 V 20 mV 150 ns 100 ns -20 20 nA 0.576 0.624 V -250 -25 A 20 s 40 s 20 A -20 A 5 5 Page VDD PFO_UND Table 1. Under Voltage Over Voltage Truth Table PFO_OV RESET_UND RESET_OV Normal Operation VDD < VDD_UND VDD > VDD_OV HIGH LOW HIGH LOW LOW HIGH HIGH LOW HIGH Notes: -UND specifies under voltage case. -OV specifies overvoltage case HIGH HIGH LOW RESET HIGH LOW LOW uP or ASIC Mode Normal Reset Asserted Reset Asserted 11 11 Page

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