The TLV809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for digital signal processors (DSPs) and processor-based systems.
During power-on, RESET is asserted when the supply voltage (VDD) becomes greater than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage, VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time (td(typ) = 200 ms) starts after VDD rises above the threshold voltage, VIT. When the supply voltage drops below the VIT threshold voltage, the output becomes active (low) again. No external components are required. All devices in this family have a fixed sense-threshold voltage (VIT) set by an internal voltage divider.
The TLV803 has an active-low, push-pull RESET output. See the TLV803 for an open-drain RESET output and the TLV810 for a push-pull, active-high RESET output.
This product family is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23 package. The TLV809 devices are characterized for operation over a temperature range of –40°C to +85°C.
||BODY SIZE (NOM)
||SOT-23 (3), DBV
||2.90 mm × 1.60 mm
|SOT-23 (3), DBZ
||2.92 mm × 1.30 mm
- For all available packages, see the orderable addendum at the end of the data sheet.
4 Revision History
Changes from C Revision (February 2012) to D Revision
Added Device Information table, Pin Configuration and Functions section, ESD Ratings table, Overview section, Feature Description section, Device Functional Modes section, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
Deleted pinout drawing from page 1 Go
Changed Description section: added third paragraph and changed section wording for clarityGo
Changed Voltage Options table: changed title, deleted duplicated data already in POA Go
Deleted soldering temperature parameter from Absolute Maximum Ratings table Go
Changed IDD parameter test conditions in Electrical Characteristics table Go
Changes from B Revision (September 2010) to C Revision
Changed TLV809L30 DBZ ordering information column in Package/Ordering Information tableGo
Changed TLV809K33 DBZ ordering information column in Package/Ordering Information tableGo
Changed first TLV809I50 DBZ ordering information entry in Package/Ordering Information tableGo
Changes from A Revision (July 2010) to B Revision
Updated document format to current standardsGo
Added DBZ package to pinout figureGo
Added DBZ package to Package/Ordering Information tableGo
Added Thermal Information tableGo
Changed Figure 3Go