STM706AM6F ,5V SupervisorBlock diagram (STM707/708) . . . . . .10Figure 9. Hardware hookup 10Figure 10. Reset o ..
STM706M6E ,5V SupervisorLogic Diagram (STM705/706/813L) . . 4Figure 3.
STM706M6F ,5V SupervisorFEATURES SUMMARY■ 5V OPERATING VOLTAGE Figure 1. Packages■ PRECISION V MONITORCC– STM705/707/813L4. ..
STM706PAM6F ,3V SupervisorBlock diagram (STM708T/S/R) . . . . . . 10Figure 9. Hardware hookup 10Figure 10. Reset o ..
STM706PM6E ,3V SupervisorSTM706T/S/R, STM706P, STM708T/S/R3V Supervisor
STM706PM6F ,3V SupervisorAbsolute Maximum Ratings . . . . . . . 17DC and AC PARAMETERS . 18Table 5. Operating and ..
SY58026UMI , ULTRA PRECISION DUAL 2:1 LVPECL MUX WITH INTERNAL TERMINATION
SY58027UMG , ULTRA PRECISION DUAL 2:1 400mV LVPECL MUX WITH INTERNAL TERMINATION
SY58027UMG , ULTRA PRECISION DUAL 2:1 400mV LVPECL MUX WITH INTERNAL TERMINATION
SY58028UMG , ULTRA PRECISION DIFFERENTIAL CML 4:1 MUX WITH 1:2 FANOUT AND INTERNAL I/O TERMINATION
SY58029UMG , ULTRA PRECISION DIFFERENTIAL LVPECL 4:1 MUX with 1:2 FANOUT and INTERNAL TERMINATION
SY58029UMG , ULTRA PRECISION DIFFERENTIAL LVPECL 4:1 MUX with 1:2 FANOUT and INTERNAL TERMINATION
STM706AM6F-STM708RAM6F
5V Supervisor
March 2014 DocID10520 Rev 10 1/33
STM705, STM706STM707, STM708, STM813L5 V supervisor
Datasheet - production data Contact local ST sales office for availability.
Features 5 V operating voltage Precision VCC monitor STM705/707/813L 4.50 V VRST 4.75 V STM706/708 4.25 VRST 4.50 V RST and RST outputs 200 ms (typ) trec Watchdog timer - 1.6 s (typ) Manual reset input (MR) Power-fail comparator (PFI/PFO) Low supply current - 40 μA (typ) Guaranteed RST (RST) assertion down to
VCC = 1.0 V Operating temperature:
–40 °C to 85 °C (industrial grade) or
–40 °C to 125 °C (automotive grade for the
STM706 only) RoHS compliance Lead-free components are compliant with
the RoHS directive
Table 1. Device summary
Watchdog
input
Watchdog
output(1) Active-low
RST(1) Active-high
RST(1) Manual reset
input
Power-fail
comparator STM705 ✓✓ ✓ ✓ ✓
STM706(2) ✓✓ ✓ ✓ ✓
STM707 ✓✓ ✓ ✓
STM708 ✓✓ ✓ ✓
STM813L ✓✓ ✓ ✓ ✓ Push-pull output Automotive grade (-40 °C to 125 °C) option for the STM706 only.
Contents STM705, STM706, STM707, STM708, STM813L2/33 DocID10520 Rev 10
Contents Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1 MR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 WDI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 WDO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 RST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 RST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 PFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7 PFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.1 Reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Push-button reset input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Watchdog input (STM705/706/813L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Watchdog output (STM705/706/813L) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5 Power-fail input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.6 Ensuring a valid reset output down to VCC = 0 V . . . . . . . . . . . . . . . . . . 12
3.7 Interfacing to microprocessors with bidirectional reset pins . . . . . . . . . . . 13
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DocID10520 Rev 10 3/33
STM705, STM706, STM707, STM708, STM813L List of tables
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Table 2. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Table 3. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Table 5. Operating and AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Table 6. DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 7. SO8 - 8-lead plastic small outline, 150 mils body width, pack. mech. data . . . . . . . . . . . .28
Table 8. TSSOP8 - 8-lead, thin shrink small outline, 3 x 3 mm body size, mechanical data . . . . . .29
Table 9. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Table 10. Marking description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Table 11. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
List of figures STM705, STM706, STM707, STM708, STM813L
4/33 DocID10520 Rev 10
List of figures
Figure 1. Logic diagram (STM705/706/813L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 2. Logic diagram (STM707/708) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 3. STM705/706/813L SO8 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Figure 4. STM705/706/813L TSSOP8 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Figure 5. STM707/708 SO8 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 6. STM707/708 TSSOP8 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 7. Block diagram (STM705/706/813L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 8. Block diagram (STM707/708) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Figure 9. Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Figure 10. Reset output valid to ground circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 11. Interfacing to microprocessors with bidirectional reset I/O . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 12. Supply current vs. temperature (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 13. VPFI threshold vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 14. Reset comparator propagation delay vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 15. Power-up trec vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 16. Normalized reset threshold vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 17. Watchdog time-out period vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 18. PFI to PFO propagation delay vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 19. Output voltage vs. load current (VCC = 5 V; TA = 25 °C) . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 20. RST output voltage vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 21. RST output voltage vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 22. RST response time (assertion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 23. RST response time (assertion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 24. Power-fail comparator response time (assertion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 25. Power-fail comparator response time (de-assertion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 26. Maximum transient duration vs. reset threshold overdrive . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 27. AC testing input/output waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 28. Power-fail comparator waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 29. MR timing waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 30. Watchdog timing (STM705/706/813L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 31. SO8 – 8-lead plastic small outline, 150 mils body width, outline . . . . . . . . . . . . . . . . . . . .28
Figure 32. TSSOP8 – 8-lead, thin shrink small outline, 3 x 3 mm body size, outline . . . . . . . . . . . . .29
DocID10520 Rev 10 5/33
STM705, STM706, STM707, STM708, STM813L Description
1 Description
The STM705/706/707/708/813L supervisors are self-contained devices which provide
microprocessor supervisory functions. A precision voltage reference and comparator
monitors the VCC input for an out-of-tolerance condition. When an invalid VCC condition
occurs, the reset output (RST) is forced low (or high in the case of RST).
These devices also offer a watchdog timer (except for STM707/708) as well as a power-fail
comparator to provide the system with an early warning of impending power failure.
These devices are available in a standard 8-pin SOIC package or a space-saving 8-pin
TSSOP package.
Figure 1. Logic diagram (STM705/706/813L) For STM705/706 only. For STM813L only.
Figure 2. Logic diagram (STM707/708)
