Document
TPS3307Ć18ĆEP, TPS3307Ć33ĆEP TRIPLE PROCESSOR SUPERVISORS
D Controlled Baseline
− One Assembly/Test Site, One Fabrication Site
D Extended Temperature Performance of
−55°C to 125°C
D Enhanced Diminishing Manufacturing
Sources (DMS) Support
D Enhanced Product Change Notification D Qualification Pedigree† D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
† Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.
SGLS140A − NOVEMBER 2002 − REVISED AUGUST 2005
D Triple Supervisory Circuits for DSP and
Processor-Based Systems
D Power-On Reset Generator With Fixed
Delay Time of 200 ms, No External Capacitor Needed
D Temperature-Compensated Voltage
Reference
D Maximum Supply Current of 40 µA D Supply Voltage Range . . . 2 V to 6 V D Defined RESET Output from VDD ≥ 1.1 V D SO-8 and MSOP-8 Packages
D or DGN PACKAGE (TOP VIEW)
SENSE1 SENSE2 SENSE3
GND
1 2 3 4
8 VDD 7 MR 6 RESET
5 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 Texas Instruments part numbers TPS3307-18 and SMJ320C6201B.
2.5 V 3.3 V
1.8 V
VDD SENSE 1
470 kΩ 620 kΩ
SENSE 2 RESET TPS3307-18
SENSE 3 GND
100 nF
VDD
SMJ320C6201B
RESET
GND
• Military applications using DSPs,
Microcontrollers or Microprocessors
w Industrial Equipment w Programmable Controls w Military Systems
Figure 1. Applications Using the TPS3307-18
description
The TPS3307-xx family is a series of micropower supply voltage supervisors designed for circuit initialization primarily in DSP and processor-based systems which require more than one supply voltage.
The TPS3307-18 and TPS3307-33 are designed for monitoring three independent supply voltages: 3.3 V/1.8 V/adj and 5V/3.3V/adj, respectively. The adjustable SENSE input allows the monitoring of any supply voltage >1.25 V.
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.
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.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2005, Texas Instruments Incorporated 1
TPS3307Ć18ĆEP, TPS3307Ć33ĆEP TRIPLE PROCESSOR SUPERVISORS
SGLS140A − NOVEMBER 2002 − REVISED AUGUST 2005
description (continued)
The various supply voltage supervisors are designed to monitor the nominal supply voltage as shown in the following supply voltage monitoring table.
SUPPLY VOLTAGE MONITORING
DEVICE
NOMINAL SUPERVISED VOLTAGE
SENSE1
SENSE2
SENSE3
THRESHOLD VOLTAGE (TYP)
SENSE1
SENSE2
SENSE3
TPS3307-18
3.3 V
1.8 V
User defined
2.93 V
1.68 V
1.25 V†
TPS3307-33
5V
3.3 V
User defined
4.55 V
2.93 V
1.25 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, tdtyp = 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-xx family of devices 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-xx family includes an active-high RESET output.
The devices are available in either 8-pin MSOP or a standard 8-pin SO packages and are characterized for operation over a temperature range of −55°C to 125°C.
ORDERING INFORMATION
TA
PACKAGE‡
ORDERABLE PART NUMBER
TOP-SIDE MARKING
Small Outline (D) Tape and Reel TPS3307-18MDREP
30718E
−55°C to 125°C
PowerPad µ-Small Outline
(DGN)
Tape and Reel
TPS3307-33MDGNREP
BNP
‡ Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
MR SENSE1 > .