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TPS3825-33DBVTG4 Datasheet(PDF) 2 Page - Texas Instruments

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Part # TPS3825-33DBVTG4
Description  PROCESSOR SUPERVISORY CIRCUITS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS3825-33DBVTG4 Datasheet(HTML) 2 Page - Texas Instruments

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TPS3820xx, TPS3823xx,
TPS3824xx, TPS3825xx,
TPS3828xx
SLVS165G − APRIL 1998 − REVISED JANUARY 2008
www.ti.com
2
DESCRIPTION (Continued)
The TPS3820/3/5/8 devices incorporate a manual reset input, MR. A low level at MR causes RESET to become active.
The TPS3824/5 devices include a high-level output RESET. TPS3820/3/4/8 have a watchdog timer that is periodically
triggered by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit
within the time-out interval, ttout, RESET becomes active for the time period td. This event also reinitializes the watchdog
timer. Leaving WDI unconnected disables the watchdog. In applications where the input to the WDI pin may be active
(transitioning high and low) when the TPS3820/3/4/8 is asserting RESET, the TPS3820/3/4/8 does not return to a non-reset
state when the input voltage is above VT. If the application requires that input to WDI is active when RESET is asserted,
WDI must be decoupled from the active signal. This decoupling can be accomplished by using an N-channel FET in series
with the WDI pin, with the gate of the FET connected to the RESET output as shown in Figure 1.
WDI
RESET
TPS3824
WDI External
Figure 1
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in an SOT23-5
package. The TPS382x devices are characterized for operation over a temperature range of −40
°C to +85°C.
PACKAGE INFORMATION(1)
DEVICE NAME
DEVICE NAME
THRESHOLD VOLTAGE(2)
MARKING
TPS3820-33DBVT(3)
TPS3820-33DBVR(4)
2.93 V
PDEI
TPS3820-50DBVT(3)
TPS3820-50DBVR(4)
4.55 V
PDDI
TPS3823-25DBVT(3)
TPS3823-25DBVR(4)
2.25 V
PAPI
TPS3823-30DBVT(3)
TPS3823-30DBVR(4)
2.63 V
PAQI
TPS3823-33DBVT(3)
TPS3823-33DBVR(4)
2.93 V
PARI
TPS3823-50DBVT(3)
TPS3823-50DBVR(4)
4.55 V
PASI
TPS3824-25DBVT(3)
TPS3824-25DBVR(4)
2.25 V
PATI
TPS3824-30DBVT(3)
TPS3824-30DBVR(4)
2.63 V
PAUI
TPS3824-33DBVT(3)
TPS3824-33DBVR(4)
2.93 V
PAVI
TPS3824-50DBVT(3)
TPS3824-50DBVR(4)
4.55 V
PAWI
TPS3825-33DBVT(3)
TPS3825-33DBVR(4)
2.93 V
PDGI
TPS3825-50DBVT(3)
TPS3825-50DBVR(4)
4.55 V
PDFI
TPS3828-33DBVT(3)
TPS3828-33DBVR(4)
2.93 V
PDII
TPS3828-50DBVT(3)
TPS3828-50DBVR(4)
4.55 V
PDHI
(1) For the most current package and ordering information see the Package Option Addendum at
the end of this document, or see the TI web site at www.ti.com.
(2) For other threshold voltage versions, please contact the local TI sales office.
(3) The DBVT package indicates tape and reel of 250 parts.
(4) The DBVR package indicates tape and reel of 3000 parts.


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