STM6720 STMicroelectronics, STM6720 Datasheet

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STM6720

Manufacturer Part Number
STM6720
Description
Dual/triple ultra-low voltage supervisors with push-button reset (with delay option)
Manufacturer
STMicroelectronics
Datasheet

Specifications of STM6720

Primary Supply (vcc1) Monitor. Fixed (factory-programmed) Reset Thresholds
4.63 V to 1.58 V
Fixed (factory-programmed) Reset Thresholds
3.08 V to 0.79 V
Tertiary Supply Monitor (using Externally Adjustable Rstin)
0.626 V internal reference
Reset Delay Time (trec) On Power-up
13.2 ms, 210 ms, 900 ms (typ)
Operating Temperature
–40 °C to 85 °C (industrial grade)

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Features
Table 1.
August 2011
STM6717
STM6718
STM6719
STM6720
STM6777
STM6778
STM6779
STM6780
number
Primary supply (V
Fixed (factory-programmed) reset thresholds:
4.63 V to 1.58 V
Secondary supply (V
(STM6717/18/19/20/77/78)
Fixed (factory-programmed) reset thresholds:
3.08 V to 0.79 V
Tertiary supply monitor (using externally
adjustable RSTIN): 0.626 V internal reference
RST outputs (push-pull or open drain); state
guaranteed if V
Reset delay time (t
210 ms, 900 ms (typ)
Manual reset input (MR)
Optional delayed manual reset input (MRC)
with external capacitor (STM6777/78/79/80)
Low supply current - 11 µA (typ),
V
Operating temperature: –40 °C to 85 °C
(industrial grade)
Part
CC1
= V
CC2
Device summary
V
CC1
Monitored voltages
= 3.6 V
CC1
CC1
rec
or V
V
CC2
CC2
) on power-up: 13.2 ms,
) monitor.
CC2
) monitor
≥ 0.8 V
RSTIN
Manual reset
with push-button reset (with delay option)
input (MR)
Dual/triple ultra-low voltage supervisors
Doc ID 11469 Rev 8
STM6717/6718/6719/6720
STM6777/6778/6779/6780
Delayed MR
pin (MRC)
(push-pull)
Active-low
Reset output (RST)
SOT23-5 (WY)
SOT23-6 (WB)
(open drain)
Active-low
Package
www.st.com
WY
WY
WB
WB
WB
WB
WB
WB
1/30
1

Related parts for STM6720

STM6720 Summary of contents

Page 1

... V V CC1 CC2 ✔ ✔ STM6717 ✔ ✔ STM6718 ✔ ✔ STM6719 ✔ ✔ STM6720 ✔ ✔ STM6777 ✔ ✔ STM6778 ✔ STM6779 ✔ STM6780 August 2011 STM6717/6718/6719/6720 STM6777/6778/6779/6780 Dual/triple ultra-low voltage supervisors with push-button reset (with delay option) ≥ 0.8 V ...

Page 2

Contents Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

STM6717/6718/6719/6720/STM6777/6778/6779/6780 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

List of figures List of figures Figure 1. Logic diagram (STM6717/18 ...

Page 5

STM6717/6718/6719/6720/STM6777/6778/6779/6780 1 Description The STM6717/18/19/20 and STM6777/78/79/80 supervisors are a family of low-voltage/low- supply current processor (micro or DSP) supervisors, designed to monitor two (or three) system power supply voltages. They are targeted at applications such as set-top boxes (STBs), ...

Page 6

... V V CC2 CC1 STM6717 MR STM6718 V SS Figure 3. Logic diagram (STM6719/20 CC2 CC1 RSTIN STM6719 STM6720 Table 2. Signal names MR Push-button reset input MRC Manual reset delay input RST Active-low reset output V Primary supply voltage input CC1 V Secondary supply voltage input ...

Page 7

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Figure 5. STM6717/18 SOT23-5 connections 5 1 RST Figure 7. STM6719/20 SOT23-6 connections 6 1 RST 1.1 Pin descriptions 1.1.1 Active-low, push-pull reset output (RST) - ...

Page 8

... This is a high impedance input. RST is driven low when the voltage at the RSTIN pin falls below 0.626 V (internal reference voltage at this comparator). The monitored voltage reset threshold is set with an external resistor-divider network. Table 3. Pin functions STM6717 STM6719 STM6718 STM6720 — — 5 ...

Page 9

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Figure 9. Block diagram V CC2 (1) RSTIN (2) MRC ( input is available on STM6717/18/19/20/77/78. CC2 2. RSTIN available only on STM6719/20/79/80. 3. MRC available only on STM6777/78/79/80. Figure 10. Hardware hookup V CC3 = (626.5mV) ...

Page 10

Operation 2 Operation 2.1 Applications information 1. Interfacing to processors with bi-directional reset pins Most processors with bi-directional reset pins can interface directly to the open drain RST outputs (STM6717/19/77/79). Systems simultaneously requiring a push-pull RST output and a bi-directional ...

Page 11

STM6717/6718/6719/6720/STM6777/6778/6779/6780 3 Typical operating characteristics Note: Typical values are at T Figure 13. Supply current vs. temperature ( –40 Figure 14. Supply current vs. temperature ( ...

Page 12

Typical operating characteristics Figure 15. Supply current vs. temperature ( –40 Figure 16. Supply current vs. temperature ( –40 12/30 ...

Page 13

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Figure 17. Normalized V 1.07 1.05 1.03 1.01 0.99 0.97 Figure 18. Maximum V 1000 100 reset time-out period vs. temperature CC –40 – Temperature (°C) transient duration vs. reset threshold overdrive ...

Page 14

Typical operating characteristics Figure 19. Normalized V 1.004 1.002 1.000 0.998 0.996 Figure 20. Normalized V 1.004 1.002 1.000 0.998 0.996 14/30 STM6717/6718/6719/6720/STM6777/6778/6779/6780 threshold vs. temperature RST1 –40 – Temperature (°C) threshold vs. temperature RST2 –40 –20 0 ...

Page 15

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Figure 21. Reset input threshold vs. temperature 630 629 628 627 626 625 624 –40 Figure 22. V CC1 –40 – Temperature (°C) -to-reset delay vs. temperature – Temperature ...

Page 16

Typical operating characteristics Figure 23. Reset input-to-reset output delay vs. temperature 29.0 28.5 28.0 27.5 27.0 26.5 26.0 25.5 25.0 –40 Figure 24. MR-to-reset output delay vs. temperature (V 500 480 460 440 420 400 16/30 STM6717/6718/6719/6720/STM6777/6778/6779/6780 – ...

Page 17

... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 4. ...

Page 18

DC and AC parameters 5 DC and AC parameters This section summarizes the operating 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 ...

Page 19

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Table 6. DC and AC characteristics Alter- Sym Description native V Operating voltage supply current CC1 CC1 I V supply current CC2 CC2 (2) I Input leakage current LI Open drain RST output I LO leakage ...

Page 20

DC and AC parameters Table 6. DC and AC characteristics (continued) Alter- Sym Description native ( reset threshold RST2 TH2 CC2 V Reset threshold hysteresis HYST RST delay RST pulse ...

Page 21

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Table 6. DC and AC characteristics (continued) Alter- Sym Description native Manual (push-button) reset input input voltage minimum pulse width (STM6717/18/19/20 MLMH MR MR minimum pulse width (STM6777/78/79/80 ...

Page 22

Package mechanical data 6 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 ...

Page 23

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Figure 28. SOT23-5 – 5-lead small outline transistor package mechanical drawing Note: Drawing is not to scale. Table 8. SOT23-5 – 5-lead small outline transistor package mechanical data Symb ...

Page 24

Package mechanical data Figure 29. SOT23-6 – 6-lead small outline transistor package mechanical drawing Note: Drawing is not to scale. Table 9. SOT23-6 – 6-lead small outline transistor package mechanical data Symb ...

Page 25

STM6717/6718/6719/6720/STM6777/6778/6779/6780 Figure 30. Carrier tape for SOT23-5L and SOT23-6L T TOP COVER TAPE K 0 Note: Part pin 1 indicator is on bottom left for shipping method “F” and is on top right for shipping method “R” see Section Table ...

Page 26

... These are standard versions and are typically held in stock. A non-standard version may require a higher minimum volumes, and/or longer delivery times. For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. 2. Available in STM6719 version only. 3. Available in STM6717 version only. 4. Available for STM6720SY, STM6719SF and STM6719SFB versions only. 26/30 STM6717/6718/6719/6720/STM6777/6778/6779/6780 STM67xx ...

Page 27

... STM6719TG 3.075 STM6719SH 2.925 STM6719TW 3.075 STM6719SV 2.925 STM6719SY 2.925 STM6719TZ 3.075 STM6720SF 2.925 STM6720TG 3.075 STM6720TW 3.075 STM6720SV 2.925 STM6720SY 2.925 STM6720TZ 3.075 STM6777SF 2.925 STM6777TG 3.075 STM6777TW 3.075 STM6777SV 2.925 STM6777SY 2.925 STM6777TZ 3.075 V threshold (V) Topside marking RST2 0.788 7SD1 0 ...

Page 28

Part numbering Table 12. Marking description (continued) Part number V threshold (V) RST1 STM6778SF 2.925 STM6778TG 3.075 STM6778TW 3.075 STM6778SV 2.925 STM6778SY 2.925 STM6778TZ 3.075 STM6779L 4.625 STM6779T 3.075 STM6779S 2.925 STM6779Y 2.188 STM6779V 1.575 STM6780L 4.625 STM6780T 3.075 STM6780S ...

Page 29

STM6717/6718/6719/6720/STM6777/6778/6779/6780 8 Revision history Table 13. Document revision history Date 18-Oct-2004 25-Oct-2004 14-Jan-2005 09-Feb-2005 08-Apr-2005 28-Jul-2005 13-Sep-2005 07-Oct-2005 07-Feb-2007 12-Jun-2007 05-Dec-2007 22-Mar-2010 02-Aug-2011 Revision 1 First draft 1.1 Descriptive text, sales types 1.2 Update characteristics, pin functions 1.3 Update characteristics ...

Page 30

... 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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