TPS3705-30_16 Datasheet, PDF (1/28 Pages) Texas Instruments – Processor Supervisory Circuits With Power-Fail

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TPS3705-30, TPS3705-33, TPS3705-50, TPS3707-30, TPS3707-50
SLVS184D – NOVEMBER 1998 – REVISED MAY 2016
TPS370x-xx Processor Supervisory Circuits With Power-Fail
1 Features
•1 Power-On Reset Generator With Fixed Delay
Time of 200 ms (No External Capacitor Needed)
• Precision Supply Voltage Monitor: 2.5 V, 3 V,
3.3 V, and 5 V
• Pin-for-Pin Compatible With the MAX705 Through
MAX708 Series
• Integrated Watchdog Time (TPS3705-xx Only)
• Voltage Monitor for Power-Fail or Low-Battery
Warning
• Maximum Supply Current of 50 µA
• 8-Pin MSOP and 8-Pin SOIC Packages
• Temperature Range: –40°C to 85°C
2 Applications
• Designs Using DSPs, Microcontrollers, or
Microprocessors
• Industrial Equipment
• Programmable Controls
• Automotive Systems
• Portable or Battery Powered Equipment
• Intelligent Instruments
• Wireless Communication Systems
• Notebook or Desktop Computers
3 Description
The TPS370x-xx family of microprocessor supply-
voltage supervisors provide circuit initialization and
timing supervision, primarily for DSP and processor-
based systems.
During power-on, RESET is asserted when the
supply voltage V_DD becomes higher than 1.1 V.
Thereafter, the supply voltage supervisor monitors
V_DD and keeps RESET active as long as V_DD remains
below the threshold voltage V_IT+. When the supply
voltage drops below the threshold voltage V_IT–, the
output becomes active (low) again. No external
components are required. All the devices of this
family have a fixed-sense threshold voltage V_IT– set
by an internal voltage divider.
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 either 8-pin MSOP or standard SOIC
packages. The TPS370x-xx devices are
characterized for operation over a temperature range
of −40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS3705-xx,
TPS3707-xx
MSOP-
PowerPAD™ (8)
SOIC (8)
358 mm × 335 mm
367 mm × 367 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical MSP430 Application
12 V
5V
910 kΩ
120 kΩ
VDD
PFO
TPS3705−50
MR
RESET
100 nF
WDO
PFI
WDI
GND
VDD
MSP430P112
RESET/NMI
I/O
I/O
GND
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.