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Details, datasheet, quote on part number:TPS3307-18QDRQ1
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Datasheet text preview:
TPS3307-18-Q1 TRIPLE PROCESSOR SUPERVISORS
SGLS136 NOVEMBER 2002
D Qualification in Accordance With D D D D D
AEC-Q100 Qualified for Automotive Applications Customer-Specific Configuration Control Can Be Supported Along With Major-Change Approval ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Triple Supervisory Circuits for DSP and Processor-Based Systems Power-On Reset Generator with Fixed Delay Time of 200 ms, No External Capacitor Needed
D Temperature-Compensated Voltage D D D D D
Reference Maximum Supply Current of 40 µA Supply Voltage Range . . . 2 V to 6 V Defined RESET Output from VDD 1.1 V SO-8 Package Temperature Range . . . 40°C to 125°C
D PACKAGE (TOP VIEW)
Contact factory for details. Q100 qualification data available on request.
SENSE1 SENSE2 SENSE3 GND
1 2 3 4
8 7 6 5
VDD MR RESET RESET
typical applications
Figure 1 lists some of the typical applications for the TPS3307 family, and a schematic diagram for a processor-based system application. This application uses TI part numbers TPS330718 and TMS470R1Vxxx.
2.5 V 3.3 V 1.8 V
VDD SENSE 1 SENSE 2 470 k RESET
100 nF
VDD TMS470R1Vxxx RESET GND
· · · ·
Automotive applications using DSPs, Microcontrollers or Microprocessors Industrial Equipment Programmable Controls Automotive Systems
TPS3307-18 SENSE 3
620 k
GND
Figure 1. Applications Using the TPS3307-18
description
The TPS3307-18 is a micropower supply voltage supervisor designed for circuit initialization primarily in automotive DSP and processor-based systems, which require more than one supply voltage. The TPS3307-18 is designed for monitoring three independent supply voltages: 3.3 V/1.8 V/adj,. The adjustable SENSE input allows the monitoring of any supply voltage >1.25 V. The various supply voltage supervisors are designed to monitor the nominal supply voltage as shown in the following supply voltage monitoring table.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
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TPS3307-18-Q1 TRIPLE PROCESSOR SUPERVISORS
SGLS136 NOVEMBER 2002
description (continued)
SUPPLY VOLTAGE MONITORING NOMINAL SUPERVISED VOLTAGE DEVICE SENSE1 SENSE2 SENSE3 THRESHOLD VOLTAGE (TYP) SENSE1 SENSE2 SENSE3 1.25 V
TPS3307-18 3.3 V 1.8 V User defined 2.93 V 1.68 V The actual sense voltage has to be adjusted by an external resistor divider according to the application requirements.
During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors the SENSEn inputs and keeps RESET active as long as SENSEn remain below the threshold voltage VIT+. An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td typ = 200 ms, starts after all SENSEn inputs have risen above the threshold voltage VIT+. When the voltage at any SENSE input drops below the threshold voltage VIT, the RESET output becomes active (low) again. The TPS3307-18 incorporates a manual reset input, MR. A low level at MR causes RESET to become active. In addition to the active-low RESET output, the TPS3307-18 includes an active-high RESET output. The device is available in a standard 8-pin SO package, and is characterized for operation over a temperature range of 40°C to 125°C. ORDERING INFORMATION
TA PACKAGE ORDERABLE PART NUMBER TOP-SIDE MARKING
40°C to 125°C Small Outline (D) Tape and Reel TPS3307-18QDRQ1 30718Q Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION/TRUTH TABLES MR L H H H H H H H H X = Don't care SENSE1>VIT1 X 0 0 0 0 1 1 1 1 SENSE2>VIT2 X 0 0 1 1 0 0 1 1 SENSE3>VIT3 X 0 1 0 1 0 1 0 1 RESET L L L L L L L L H RESET H H H H H H H H L
PowerPAD is a trademark of Texas Instruments Incorporated.
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TPS3307-18-Q1 TRIPLE PROCESSOR SUPERVISORS
SGLS136 NOVEMBER 2002
functional block diagram
VDD 14 k MR R1 SENSE 1 R2 R3 SENSE 2 R4 GND Reference Voltage of 1.25 V SENSE 3 + _ + _ RESET Logic + Timer RESET RESET TPS3307
_ + Oscillator
timing diagram
SENSEn V(nom) VIT
t MR 1
0 RESET 1
t
0 td td td RESET Because of SENSE Below VIT RESET Because of MR RESET Because of SENSE Below VIT RESET Because of SENSE Below VIT
t
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· DALLAS, TEXAS 75265
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