STM706 STMicroelectronics, STM706 Datasheet

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STM706

Manufacturer Part Number
STM706
Description
5V Supervisor
Manufacturer
STMicroelectronics
Datasheet

Specifications of STM706

Operating Temperature
–40 °C to 85 °C (industrial grade)

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Features
Table 1.
1. Push-pull output
August 2010
STM705
STM706
STM707
STM708
STM813L
5 V operating voltage
Precision V
– STM705/707/813L
– 4.50 V
– STM706/708
– 4.25
RST and RST outputs
200 ms (typ) t
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
V
Operating temperature: –40 °C to 85 °C
(industrial grade)
RoHS compliance
– Lead-free components are compliant with
CC
the RoHS directive
= 1.0 V
Device summary
CC
V
RST
V
rec
Watchdog
monitor
RST
input
4.50 V
4.75 V
Watchdog
output
(1)
Doc ID 10520 Rev 9
STM707, STM708, STM813L
Active-low
RST
(1)
1. Contact local ST sales office for availability.
Active-high
RST
(1)
STM705, STM706
TSSOP8 3x3 (DS)
Manual reset
8
SO8 (M)
input
1
5 V supervisor
(1)
comparator
Power-fail
www.st.com
1/33
1

STM706 Summary of contents

Page 1

... Features ■ operating voltage ■ Precision V monitor CC – STM705/707/813L – 4. 4.75 V RST – STM706/708 – 4.25 V 4.50 V RST ■ RST and RST outputs ■ 200 ms (typ) t rec ■ Watchdog timer - 1.6 s (typ) ■ Manual reset input (MR) ■ Power-fail comparator (PFI/PFO) ■ Low supply current - 40 µA (typ) ■ ...

Page 2

... Ensuring a valid reset output down to V 3.7 Interfacing to microprocessors with bidirectional reset pins . . . . . . . . . . . 13 4 Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2/33 STM705, STM706, STM707, STM708, STM813L = Doc ID 10520 Rev 9 ...

Page 3

... STM705, STM706, STM707, STM708, STM813L 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 ...

Page 4

... Figure 30. Watchdog timing (STM705/706/813L Figure 31. SO8 – 8-lead plastic small outline, 150 mils body width, outline . . . . . . . . . . . . . . . . . . . . 28 Figure 32. TSSOP8 – 8-lead, thin shrink small outline body size, outline . . . . . . . . . . . . . 29 4/33 STM705, STM706, STM707, STM708, STM813L = ° Doc ID 10520 Rev 9 ...

Page 5

... STM705, STM706, STM707, STM708, STM813L 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 V CC 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 ...

Page 6

... Description Table 2. Signal names 1. For STM813L only. Figure 3. STM705/706/813L SO8 connections 1. For STM813L, reset output is active-high. Figure 4. STM705/706/813L TSSOP8 connections 1. For STM813L, reset output is active-high. 6/33 STM705, STM706, STM707, STM708, STM813L MR WDI WDO RST (1) RST V CC PFI PFO SO8 ...

Page 7

... STM705, STM706, STM707, STM708, STM813L Figure 5. STM707/708 SO8 connections Figure 6. STM707/708 TSSOP8 connections SO8 RST RST PFI PFO 4 5 TSSOP8 RST RST PFO PFI Doc ID 10520 Rev 9 Description AI08828a AI09115 ...

Page 8

... logic high. It stays high for goes from high to low. 2.6 PFI When PFI is less than V ground if unused. 8/33 STM705, STM706, STM707, STM708, STM813L falls below the reset threshold; however, unlike the reset output, WDO CC exceeds the reset threshold. Output type is push-pull. CC after either V rec ...

Page 9

... STM705, STM706, STM707, STM708, STM813L 2.7 PFO When PFI is less than V unused. Output type is push-pull. Table 3. Pin description Pin STM707 STM813L STM708 — 8 — — — 6 Figure 7. Block diagram (STM705/706/813L) WDI WDI transitional detector ...

Page 10

... Pin descriptions Figure 8. Block diagram (STM707/708 PFI Figure 9. Hardware hookup Unregulated voltage For STM705/706/813L. 10/33 STM705, STM706, STM707, STM708, STM813L COMPARE V RST V PFI COMPARE 5 V Regulator STM705 STM706 STM707 0.1 mF STM708 STM813L WDI (1) From microprocessor PFI MR Push-button ...

Page 11

... STM705, STM706, STM707, STM708, STM813L 3 Operation 3.1 Reset output The STM705/706/707/708/813L supervisor asserts a reset signal to the MCU whenever V goes below the reset threshold (V CC MR), or when the push-button reset input (MR) is taken low. RST is guaranteed logic low (logic high for STM707/708/813L) for V 85 ° ...

Page 12

... A resistor value of approximately 100 k will be large enough to not load the output under operating conditions, but still sufficient to pull RST to ground during this low voltage condition (see Figure 10. Reset output valid to ground circuit 12/33 STM705, STM706, STM707, STM708, STM813L input to the STM705/706/707/708/ 813L STMXXX ...

Page 13

... STM705, STM706, STM707, STM708, STM813L 3.7 Interfacing to microprocessors with bidirectional reset pins Microprocessors with bidirectional reset pins can contend with the STM705-708 reset output. For example, if the reset output is driven high and the micro wants to pull it low, signal contention will result. To prevent this from occurring, connect a 4.7 k between the reset output and the micro's reset I Figure 11 ...

Page 14

... 2.5 V 1.260 3 3.3 V 1.255 3.6 V 1.250 1.245 1.240 1.235 1.230 1.225 –40 –20 14/33 STM705, STM706, STM707, STM708, STM813L = 25 ° Temperature (° Temperature (°C) Doc ID 10520 Rev 5.5 V ...

Page 15

... STM705, STM706, STM707, STM708, STM813L Figure 14. Reset comparator propagation delay vs. temperature –40 –20 Figure 15. Power-up t vs. temperature rec 240 235 230 225 220 215 210 –40 – Temperature (° Temperature (°C) Doc ID 10520 Rev 9 ...

Page 16

... Figure 16. Normalized reset threshold vs. temperature 1.004 1.002 1.000 0.998 0.996 –40 –20 Figure 17. Watchdog time-out period vs. temperature 1.90 1.85 1.80 1.75 1.70 1.65 1.60 –40 –20 16/33 STM705, STM706, STM707, STM708, STM813L Temperature (° Tempe rature (°C) Doc ID 10520 Rev 9 80 100 120 AI09145b 3 4 5.5 V ...

Page 17

... STM705, STM706, STM707, STM708, STM813L Figure 18. PFI to PFO propagation delay vs. temperature 4.0 3.0 2.0 1.0 0.0 –40 –20 Figure 19. Output voltage vs. load current (V 5.00 4.98 4.96 4. Temperature (° ° OUT (mA) Doc ID 10520 Rev 9 Typical operating characteristics ...

Page 18

... Typical operating characteristics Figure 20. RST output voltage vs. supply voltage Figure 21. RST output voltage vs. supply voltage 18/33 STM705, STM706, STM707, STM708, STM813L V RST V CC 500 ms / div V RST V CC 500 ms / div Doc ID 10520 Rev AI09149b 5 ...

Page 19

... STM705, STM706, STM707, STM708, STM813L Figure 22. RST response time (assertion RST 4.603 °C. RST Typical operating characteristics 5 µs / div Doc ID 10520 Rev div 1V/div 0 V AI09151b 19/33 ...

Page 20

... RST div 4.603 °C. RST Figure 24. Power-fail comparator response time (assertion PFO 1.3 V PFI 20/33 STM705, STM706, STM707, STM708, STM813L 5 µs / div 500 ns / div Doc ID 10520 Rev AI09152b div 0 V 500 mV / div 0 V AI09153b ...

Page 21

... STM705, STM706, STM707, STM708, STM813L Figure 25. Power-fail comparator response time (de-assertion) PFO 0 V PFI 0 V Figure 26. Maximum transient duration vs. reset threshold overdrive 6000 5000 4000 3000 2000 1000 500 ns / div Reset occurs above the curve Reset comparator overdrive, V RST – (V) ...

Page 22

... Supply voltage CC I Output current O P Power dissipation D 1. Reflow at peak temperature of 260 °C. The time above 255 °C must not exceed 30 seconds. 22/33 STM705, STM706, STM707, STM708, STM813L Parameter Off) CC –0 Doc ID 10520 Rev 9 Value Unit –55 to 150 °C 260 ° ...

Page 23

... STM705, STM706, STM707, STM708, STM813L 6 DC and AC parameters This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC characteristics tables that follow, are derived from tests performed under the measurement conditions summarized in Table 5 ...

Page 24

... DC and AC parameters Figure 29. MR timing waveform MR t MLRL (1) RST 1. RST for STM805. Figure 30. Watchdog timing (STM705/706/813L rec RST WDI WDO 24/33 STM705, STM706, STM707, STM708, STM813L t rec t MLMH Doc ID 10520 Rev AI07837a AI08833 ...

Page 25

... STM705, STM706, STM707, STM708, STM813L Table 6. DC and AC characteristics Sym Description V Operating voltage supply current CC CC Input leakage current (MR) Input leakage current (PFI Input leakage current (WDI) V Input high voltage (MR Input high voltage (WDI Input low voltage (MR) ...

Page 26

... MR to RST output delay t ( MRD) Watchdog timer (STM705/706/813L) t Watchdog timeout period WD WDI pulse width 1. Valid for ambient operating temperature 4 5.5 V for STM706/708 (except where noted (min) = 1.0 V for °C to +85 ° For V falling. CC 26/33 STM705, STM706, STM707, STM708, STM813L ...

Page 27

... STM705, STM706, STM707, STM708, STM813L 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Doc ID 10520 Rev 9 Package mechanical data ® ...

Page 28

... Figure 31. SO8 – 8-lead plastic small outline, 150 mils body width, outline Drawing is not to scale. Table 7. SO8 - 8-lead plastic small outline, 150 mils body width, pack. mech. data Symbol ddd 28/33 STM705, STM706, STM707, STM708, STM813L A ddd Typ Min Max — 1.35 1.75 — 0.10 0.25 — ...

Page 29

... STM705, STM706, STM707, STM708, STM813L Figure 32. TSSOP8 – 8-lead, thin shrink small outline body size, outline Drawing is not to scale. Table 8. TSSOP8 - 8-lead, thin shrink small outline body size, mechanical data Symbol ...

Page 30

... E = ECOPACK package, tubes ® ECOPACK package, tape and reel 1. Available for STM706/708 in SO8 (M) package only. 2. Contact local ST sales office for availability. For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. Table 10. Marking description ...

Page 31

... STM705, STM706, STM707, STM708, STM813L 9 Revision history Table 11. Document revision history Date Sep-2003 31-Oct-2003 12-Dec-2003 16-Jan-2004 09-Apr-2004 25-May-2004 02-Jul-2004 21-Sep-2004 08-Mar-2005 02-Nov-2009 06-Aug-2010 Revision 1 Initial release. 1.1 Update Table 6. Reformatted; update characteristics 2 29, 30, Table 7, 9, 11) 2.1 Add typical characteristics Reformatted; update characteristics 3 Table ...

Page 32

... STM705, STM706, STM707, STM708, STM813L Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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