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STMicroelectronics Electronic Components Datasheet

STM706P Datasheet

(STM706x / STM708x) 3V Supervisor

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STM706P pdf
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STM706T/S/R, STM706P, STM708T/S/R
3V Supervisor
FEATURES SUMMARY
PRECISION VCC MONITOR
– STM706/708
T: 3.00V VRST 3.15V
S: 2.88V VRST 3.00V
R; STM706P: 2.59V VRST 2.70V
RST AND RST OUTPUTS
200ms (TYP) trec
WATCHDOG TIMER - 1.6sec (TYP)
MANUAL RESET INPUT (MR)
POWER-FAIL COMPARATOR (PFI/PFO)
LOW SUPPLY CURRENT - 40µA (TYP)
GUARANTEED RST (RST) ASSERTION
DOWN TO VCC = 1.0V
OPERATING TEMPERATURE:
–40°C to 85°C (Industrial Grade)
Figure 1. Packages
8
1
SO8 (M)
TSSOP8 3x3 (DS)
Table 1. Device Options
Watchdog
Input
Watchdog
Output
Active-Low
RST(1)
Active-High
RST(1)
STM706T/S/R
✔✔
STM706P(2)
STM708T/S/R
✔✔
Note: 1. Push-Pull Output
2. The STM706P is identical to the STM706R, except its reset output is active-high.
Manual
Reset Input
Power-fail
Comparator
February 2005
1/26


STMicroelectronics Electronic Components Datasheet

STM706P Datasheet

(STM706x / STM708x) 3V Supervisor

No Preview Available !

STM706P pdf
STM706T/S/R; STM706P; STM708T/S/R
TABLE OF CONTENTS
FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 1. Device Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 2. Logic Diagram (STM706T/S/R and STM706P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. Logic Diagram (STM708T/S/R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 4. STM706T/S/R and STM706P SO8 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 5. STM706T/S/R and STM706P TSSOP8 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 6. STM708T/S/R SO8 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 7. STM708T/S/R TSSOP8 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 8. Block Diagram (STM706T/S/R and STM706P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 9. Block Diagram (STM708T/S/R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 10.Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reset Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Push-button Reset Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Watchdog Input (STM706T/S/R and STM706P). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Watchdog Output (STM706T/S/R and STM706P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power-fail Input/Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ensuring a Valid Reset Output Down to VCC = 0V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 11.Reset Output Valid to Ground Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Interfacing to Microprocessors with Bi-directional Reset Pins . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 12.Interfacing to Microprocessors with Bi-directional Reset I/O . . . . . . . . . . . . . . . . . . . . . . 10
TYPICAL OPERATING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 13.Supply Current vs. Temperature (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 14.VPFI Threshold vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 15.Reset Comparator Propagation Delay vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 16.Power-up trec vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 17.Normalized Reset Threshold vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 18.Watchdog Time-out Period vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 19.PFI to PFO Propagation Delay vs. Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 20.Output Voltage vs. Load Current (VCC = 5V; VBAT = 2.8V; TA = 25°C). . . . . . . . . . . . . . 14
Figure 21.Output Voltage vs. Load Current (VCC = 0V; VBAT = 2.8V; TA = 25°C). . . . . . . . . . . . . . 14
Figure 22.RST Output Voltage vs. Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 23.RST Output Voltage vs. Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 24.Power-fail Comparator Response Time (Assertion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 25.Power-fail Comparator Response Time (De-Assertion) . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/26


Part Number STM706P
Description (STM706x / STM708x) 3V Supervisor
Maker ST Microelectronics
Total Page 26 Pages
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