STC705 ETC1
Document overview
- Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 7
Technical content
Features
- Precision supply-voltage monitor - 4.63V (STC706L/705, 813L, 708L/707) - 4.38V (STC706M/706, 813M, 708M/708) - 3.08V (STC706T, 813T, 708T) - 2.93V (STC706S, 813S, 708S) - 2.63V (STC706R, 813R/706P, 708R) - 2.32V (STC706Z, 813Z, 708Z) - 2.20V (STC706Y, 813Y, 708Y) 200ms reset pulse width Debounced TTL/CMOS-compatible manual- reset input Independent watchdog timer 1.6sec time-out (not available for STC707/708/708T/708S/R/Z/Y) Reset output signal: - Active-low only (STC705/706/706T/S/R/Z/Y) - Active-high only (STC813L/M/T/S/R/706P) - Active-high and active-low (707/708/708T/S/R) V oltage monitor for power-fail or low battery warning Guaranteed RESET/RESET valid at V CC = 1.2V Introduction The STC706X/813X/708X family microprocessor (µP) supervisory circuits are targeted to improve reliability and accuracy of power-supply circuitry in µP systems. These devices reduce the complexity and number of components required to monitor power- supply and battery functions. The main functions are: 1. Asserting reset output during power-µp, power- down and brownout conditions for µP system; 2. Detecting power failure or low-battery conditions with a 1.25V threshold detector; 3. Watchdog functions (not for STC708x).
Applications
Power-supply circuitry in µP systems
STC705-706/706P-707-708-708T/S/R-813L µµµµµP Supervisor Circuits STC Ver1.0
Contents
Figure 3. Pin Configuration Table 1. Pin Description
their individual features. The typical application see Figure 4. pulse, the pulse continues for at least another 140ms. 80C51, require an active-high reset pulse. counting. Pulses as short as 50ns can be detected. the reset threshold, thus functioning as a low-line output. logic compatible, so it can be driven by any logic reset output. connected to a 1.25V reference. Figure 4. Typical Application Circuit
Table 2. Function Table of PT7A75xx Family
Figure 7. 8-Pin SOIC