STM6524 6-pin Smart ResetTM Datasheet - production data Features Operating voltage 1.65 V to 5.5 V Low supply current 1.5 A Integrated test mode Dual Smart ResetTM push-button inputs with fixed extended reset setup delay (tSRC) from 0.5 s to 10 s in 0.5 s steps (typ.), option with internal pull-up resistor Push-button controlled reset pulse duration - Option 1: fully push-button controlled, no fixed or minimum pulse width guaranteed - Option 2: defined output reset pulse duration (tREC), factory-programmed No power-on reset Single reset output - Active low or active high - Push-pull or open drain with optional pullup resistor Fixed Smart ResetTM input logic voltage levels Operating temperature: -40 C to +85 C UDFN6 package: 1.6 mm x 1.3 mm ECOPACK(R)2 (RoHS compliant, HalogenFree) August 2012 This is information on a product in full production. UDFN6 1.6 mm x 1.3 mm Applications Mobile phones, smartphones, PDAs e-books MP3 players Games Portable navigation devices Any application that requires delayed reset push-button(s) response for improved system stability. Doc ID 022335 Rev 3 1/24 www.st.com 1 Contents STM6524 Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 Power supply (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Ground (VSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 Smart ResetTM input (SR0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Smart ResetTM input (SR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Reset output (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 Typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Timing waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 9 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 10 Package marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2/24 Doc ID 022335 Rev 3 STM6524 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Operating and measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 DC and AC characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Mechanical data for UDFN6 1.6 x 1.3 x 0.55 mm, 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 19 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Package marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Doc ID 022335 Rev 3 3/24 List of figures STM6524 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. 4/24 Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Single-button Smart ResetTM typical hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Dual-button Smart ResetTM typical hookup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Option without tREC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Option with tREC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Undervoltage condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Supply current (ICC) vs. temperature (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Smart ResetTM delay (tSRC) vs. temperature (TA), tSRC = 7.5 s (typ.). . . . . . . . . . . . . . . . . 13 Test mode entry voltage (VTEST) vs. temperature (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Initial test mode time (tSRC-INI) vs. temperature (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Package outline for UDFN6 1.6 x 1.3 x 0.55 mm, 0.40 mm pitch . . . . . . . . . . . . . . . . . . . . 18 Footprint recommendation for UDFN6 1.6 x 1.3 x 0.55 mm, 0.40 mm pitch. . . . . . . . . . . . 19 Carrier tape for UDFN6 1.6 x 1.3 x 0.55 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Pin 1 orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Package marking (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Doc ID 022335 Rev 3 STM6524 1 Description Description The Smart ResetTM devices provide a useful feature that ensures inadvertent short reset push-button closures do not cause system resets. This is done by implementing extended Smart ResetTM input delay time (tSRC) and combined push-button inputs, which together ensures a safe reset and eliminates the need for a specific dedicated reset button. This reset configuration provides versatility and allows the application to distinguish between a software generated interrupt and a hard system reset. When the input push-buttons are connected to microcontroller interrupt inputs, and are closed for a short time, the processor can only be interrupted. If the system still does not respond properly, continuing to keep the push-buttons closed for the extended setup time tSRC causes a hard reset of the processor through the reset output. The STM6524 has two combined delayed Smart ResetTM inputs (SR0, SR1) with preset delayed Smart ResetTM setup time (tSRC). The reset output is asserted after both of the Smart ResetTM inputs were held active for the selected tSRC delay time. Depending on selected option the RST output remains asserted either until at least one SR input goes to inactive logic level (i.e. neither fixed nor minimum reset pulse width is set) or the output reset pulse duration is fixed for tREC (i.e. factory-programmed). The reset output, RST, is active low or active high, push-pull or open drain with optional pull-up resistor. The device fully operates over a broad VCC range 1.65 V to 5.5 V. Below 1.575 V typ. the inputs are ignored and outputs are deasserted; the deasserted reset output levels are then valid down to 1.0 V. Test mode After pull of SR0 up to VTEST or more (VCC + 1.4 V, max.) we start counting initial shorten tSRC-INI (42 ms, typ.). After tSRC-INI expires, the RST output either goes down for tREC (if tREC option is used) or stays low as long as overvoltage on SR0 in detected (if tREC option is not used). This is a feedback and a user knows that the device is locked in the test mode. Each time both SR inputs are connected to ground in test mode a shorten tSRC-SHORT (21 ms, typ.) is used instead of long tSRC (0.5 s -10 s). Return from to normal mode is possible by a new startup of the device (i.e. VCC goes to 0 V and back to its original state). In this way the device can be quickly tested without repeating test mode triggering. Advantage of this solution is pretty high glitch immunity, feedback to user about entry to the test mode and testability within full VCC range. Doc ID 022335 Rev 3 5/24 Description STM6524 Figure 1. Logic diagram 6## 32 34- 234 32 '.$ !- Figure 2. Pin connections (top view) 633 32 234 34 6## 32 .# !- 6/24 Doc ID 022335 Rev 3 STM6524 Table 1. Pin Name 1 VSS 2 SR1 Description Signal names Type Supply ground Ground Input 3 RST Output 4 NC - 5 SR0 Input 6 VCC Figure 3. Description Secondary push-button Smart ResetTM input. Active low. Optional pull-up resistor. Reset output (open drain with optional pull-up resistor, active low) (push-pull - active low or active high) Not connected (not bonded; should be connected to VSS) Primary push-button Smart ResetTM input. Active low. Optional pull-up resistor. Positive supply voltage for the device. A 0.1 F decoupling ceramic capacitor is Supply voltage recommended to be connected between VCC and VSS pins, as close to the STM6524 device as possible. Block diagram /VERVOLTAGE DETECT TEST MODE TRIGGER 32 32 !.$ T 32# GENERATOR T2%# GENERATOR OPTIONAL 234 !-6 Doc ID 022335 Rev 3 7/24 Pin descriptions STM6524 2 Pin descriptions 2.1 Power supply (VCC) This pin is used to provide power to the Smart ResetTM device. A 0.1 F ceramic decoupling capacitor is recommended to be connected between the VCC and VSS pins, as close to the STM6524 device as possible. 2.2 Ground (VSS) Ground pin for the device. 2.3 Smart ResetTM input (SR0) Push-button Smart ResetTM input is active low with optional pull-up resistor. Both SR inputs need to be asserted simultaneously for at least tSRC to assert the reset output (RST). By connecting a voltage higher than VCC to the SR0 the device enters a test mode (see Section 1: Description on page 5 for more information). 2.4 Smart ResetTM input (SR1) Push-button Smart ResetTM input is active low with optional pull-up resistor. Both SR inputs need to be asserted simultaneously for at least tSRC to assert the reset output (RST). 2.5 Reset output (RST) RST is active low or active high, push-pull or open drain reset output with optional internal pull-up resistor. Output reset pulse width is optional as follows: Neither fixed nor minimum output reset pulse duration (releasing the push-button while reset output is active, causes the output to de-assert); Fixed, factory-programmed output reset pulse duration for tREC independent on Smart ResetTM input state. If VCC drops below 1.575 V, the RST output is deasserted and its state is guaranteed down to 1 V (see Figure 8). 8/24 Doc ID 022335 Rev 3 STM6524 3 Typical application diagram Typical application diagram Figure 4. Single-button Smart ResetTM typical hookup 6## 6## 6## 234 2%3%4 34- -#5 32 ).4 .-) 32 633 633 053( "544/. 37)4#( !-6 1. External pull-up resistor requested if the reset output (RST) is open drain type without internal pull-up. 2. External pull-up resistor requested if the Smart ResetTM inputs (SR0 and SR1) have no internal pull-up. 3. When only one Smart ResetTM input push-button is used, tie both the SR inputs together. Doc ID 022335 Rev 3 9/24 Typical application diagram Figure 5. STM6524 Dual-button Smart ResetTM typical hookup 6## 6## 6## 234 2%3%4 34- -#5 32 32 ).4 .-) 633 633 053( "544/. 37)4#( 053( "544/. 37)4#( !-6 1. External pull-up resistor requested if the reset output (RST) is open drain type without internal pull-up. 2. External pull-up resistor requested if the Smart ResetTM inputs (SR0 and SR1) have no internal pull-up. 10/24 Doc ID 022335 Rev 3 STM6524 Timing waveforms 4 Timing waveforms Figure 6. Option without tREC 6 6## 6 6 6 3TART TIMER %ND TIMER 0USH BUTTON CONTROLLED OUTPUT T32# 32 'LITCH IMMUNITY 32 234 !-6 Figure 7. Option with tREC 6 6 6 6 6## T2%# T32# 32 'LITCH IMMUNITY 32 234 !-6 Doc ID 022335 Rev 3 11/24 Timing waveforms Figure 8. STM6524 Undervoltage condition 6 6## 6 6 6 32 6 6 32 6 6 234 6 T32# 4IME S !- 1. If undervoltage occurs (VCC drops below 1.575 V typ.) while reset output is active, the reset output is released and goes inactive. 12/24 Doc ID 022335 Rev 3 STM6524 Typical operating characteristics Figure 9. Supply current (ICC) vs. temperature (TA) 3UPPLY CURRENT )## ! 6## 6 6## 6 6## 6 4EMPERATURE # !-6 Figure 10. Smart ResetTM delay (tSRC) vs. temperature (TA), tSRC = 7.5 s (typ.) 3MART 2ESET4- DELAY T 32# S 5 Typical operating characteristics 6## 6 6## 6 6## 6 4EMPERATURE # !-6 Doc ID 022335 Rev 3 13/24 Typical operating characteristics STM6524 Figure 11. Test mode entry voltage (VTEST) vs. temperature (TA) 4EST MODE ENTRY VOLTAGE 64%34 6 6## 6 6## 6 6## 6 4EMPERATURE 4! # !- Figure 12. Initial test mode time (tSRC-INI) vs. temperature (TA) )NITIAL TEST MODE TIME T32#?).) MS 6## 6 6## 6 6## 6 4EMPERATURE 4! # 14/24 Doc ID 022335 Rev 3 !- STM6524 6 Maximum ratings Maximum ratings Stressing the device above the rating listed in Table 2: Absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in Table 3: Operating and measurement conditions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronicsTM SURE program and other relevant quality documents. Table 2. Absolute maximum ratings Symbol TSTG TSLD(1) Parameter Storage temperature (VCC off) Lead solder temperature for 10 seconds VIO Input or output voltage VCC Supply voltage Value Unit -55 to +150 C 260 C -0.3 to 5.5(2) V -0.3 to 7 V ESD VHBM Electrostatic discharge protection, human body model (JESD22A114-B level 2) 2 kV VRCDM Electrostatic discharge protection, charged device model, all pins 1 kV 200 V EIA/JESD78 - VMM Electrostatic discharge protection, machine model, all pins (JESD22-A115-A level A) Latch-up (VCC pin, SR0 reset input pin) 1. Reflow at peak temperature of 260 C. The time above 255 C must not exceed 30 seconds. 2. For push-pull RST output type only from -0.3 V to VCC +0.3 V. Doc ID 022335 Rev 3 15/24 DC and AC parameters 7 STM6524 DC and AC parameters This section summarizes the operating measurement conditions, and the DC and AC characteristics of the device. The parameters inTable 4: DC and AC characteristic that follow, are derived from tests performed under the measurement conditions summarized in Table 3: Operating and measurement conditions. Designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. Table 3. Operating and measurement conditions Symbol VCC TA 16/24 Parameter Value Unit Supply voltage 1.65 to 5.5 V Ambient operating temperature -40 to +85 C Doc ID 022335 Rev 3 STM6524 Table 4. DC and AC parameters DC and AC characteristic Symbol Parameter VCC Supply voltage(3) ICC Supply current (inputs in their inactive state, tSRC counter is not running) VOL VOH tREC Reset output voltage low Reset output voltage high (push-pull output only) Reset timeout delay, factory-programmed Test conditions(1) Min. Typ.(2) 1.65 Max. Unit 5.5 V VCC = 3.0 V 1.1 2.5 A VCC = 5.0 V 1.5 3.0 A VCC 4.5 V, sinking 3.2 mA 0.3 V VCC 3.3 V, sinking 2.5 mA 0.3 V VCC 1.65 V, sinking 1 mA 0.3 V VCC 4.5 V, ISOURCE = 0.8 mA 0.8 VCC V VCC 2.7 V, ISOURCE = 0.5 mA 0.8 VCC V VCC 1.65 V, ISOURCE = 0.25 mA 0.8 VCC V (device option) RPUO Internal output pull-up resistor on RST (device option) ILO Output leakage current VRST = 5.5 V, open drain device option without output pull-up resistor 0.85 1.28 1.71 ms 66 100 134 ms 140 210 280 ms 240 360 480 ms 65 -0.1 k 0.1 A Smart ResetTM tSRC Smart ResetTM delay TA = -40 to +85 C 0.8 x tSRC TA = 25 C 0.9 x tSRC tSRC(4) 1.2 x tSRC 1.1 x tSRC s VIL SR0, SR1 input voltage low VSS -0.3 0.3 V VIH SR0, SR1 input voltage high 0.85 5.5 V ILI SR0, SR1 input leakage current -0.1 0.1 A Input glitch immunity(5) SR0 and SR1 asserted tSRC s Test mode VTEST Test mode entry voltage tSRC-INI Initial test mode time tSRCSHORT Shorten Smart ResetTM delay VCC +0.9 VCC +1.1 VCC +1.4 V 28 42 56 ms 16.8 21 25.2 ms 1. Valid for ambient operating temperature TA = -40 to +85 C, VCC = 1.65 to 5.5 V. 2. Typical values are at 25 C and VCC = 3.3 V unless otherwise noted. 3. Reset outputs are deasserted below 1.575 V typ. and remain deasserted down to VCC = 1 V. 4. Factory-programmable in the range of 0.5 s to 10 s typ. in 0.5 s steps (see Table 7 for available delays). 5. Input glitch immunity is equal to tSRC, when both inputs (SR0 and SR1) are low. Otherwise infinite. Doc ID 022335 Rev 3 17/24 Package information 8 STM6524 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK(R) is an ST trademark. Figure 13. Package outline for UDFN6 1.6 x 1.3 x 0.55 mm, 0.40 mm pitch $ ! " 0). ).$%8 !2%! $X% % # X # X 4/0 6)%7 # # ! X 3%!4). ' 0,!.% 3)$% 6)%7 # ! E B X 0). ).$%8 !2%! $X% # ! " # , X "/44/- 6)%7 !- 18/24 Doc ID 022335 Rev 3 STM6524 Package information Table 5. Mechanical data for UDFN6 1.6 x 1.3 x 0.55 mm, 0.40 mm pitch Dimensions Symbol Drawing (millimeters) Drawing (inches) Note Min. Typ. Max. Min. Typ. Max. A 0.50 0.55 0.60 0.020 0.022 0.024 A1 0.00 0.02 0.05 0.0000 0.0008 0.0020 b 0.15 0.20 0.25 0.006 0.008 0.010 D 1.30 BSC 0.051 BSC E 1.60 BSC 0.063 BSC e 0.40 BSC 0.016 BSC L 0.250 N 0.325 0.400 0.0098 6 0.0128 0.0157 6 Figure 14. Footprint recommendation for UDFN6 1.6 x 1.3 x 0.55 mm, 0.40 mm pitch !- Doc ID 022335 Rev 3 19/24 Package information STM6524 Figure 15. Carrier tape for UDFN6 1.6 x 1.3 x 0.55 mm 0 4 0O % 9 $ #, & 7 2%& "O 9 0 !O +O 3%#4)/. 9 9 !O "O +O & 0 7 !- 1. Measured from centreline of sprocket hole to centreline of pocket. 2. Cumulative tolerance of 10 sprocket holes is 0.20. 3. Measured from centreline of sprocket hole to centreline of pocket. 4. Other material available. 5. Typical SR of formed tape max. 109 / SQ. 6. All dimensions in millimeters unless otherwise stated. Figure 16. Pin 1 orientation 5SER DIRECTION OF FEED !- 20/24 Doc ID 022335 Rev 3 STM6524 9 Part numbering Part numbering Table 6. Ordering information scheme Example: STM6524 A H A R DL 6 F Device type STM6524 Reset (VCC monitoring threshold) voltage VRST A = no VCC monitoring feature Smart ResetTM set up delay (tSRC)(1) H = factory programmable tSRC = 4.0 s, no pull-up L = factory programmable tSRC = 6.0 s, no pull-up P = factory programmable tSRC = 7.5 s, no pull-up U = factory programmable tSRC = 10.0 s, no pull-up Outputs type A = open drain, no pull-up, active low C = open drain, 50 k internal pull-up resistor, active low D = push-pull, active low H = push-pull, active high Reset timeout period (tREC) A = factory programmable tREC = 210 ms (typ.) B = factory programmable tREC = 360 ms (typ.) E = factory programmable tREC = 1.28 ms (typ.) F = factory programmable tREC = 100 ms (typ.) R = push-button controlled Package DL = UDFN6 Temperature range 6 = -40 C to +85 C Shipping method F = Tape and reel 1. Smart ResetTM delay (tSRC) is available from 0.5 s to 10 s in 0.5 s steps (typ.). Minimum order quantities may apply. Contact local sales office for availability. Doc ID 022335 Rev 3 21/24 Package marking information 10 STM6524 Package marking information Table 7. Package marking Part number tSRC (s) Smart ResetTM inputs(1) Output type(2) tREC option (ms)(3) STM6524AHARDL6F 4.0 AL OD, AL No tREC UDFN6 HA STM6524ALABDL6F 6.0 AL OD, AL 360 UDFN6 LC STM6524ALARDL6F 6.0 AL OD, AL No tREC UDFN6 LA STM6524APARDL6F 7.5 AL OD, AL No tREC UDFN6 PA STM6524AUABDL6F 10.0 AL OD, AL 360 UDFN6 UC STM6524AUARDL6F 10.0 AL OD, AL No tREC UDFN6 UA Package Topmark 1. AL = active low. 2. OD = open drain, AL = active low. 3. No tREC = push-button controlled reset pulse width. Figure 17. Package marking (top view) ! " ! DOT PIN REFERENCE " MARKING AREA TOPMARK !- 22/24 Doc ID 022335 Rev 3 STM6524 11 Revision history Revision history Table 8. Document revision history Date Revision Changes 07-Oct-2011 1 Initial release. 13-Jun-2012 2 Updated Features, Section : Test mode, Table 4, title of Section 8, minor text corrections throughout document. 31-Aug-2012 3 Updated Table 7 (added "(ms)" to tREC option, added STM6524ALABDL6F and STM6524AUABDL6F devices). Doc ID 022335 Rev 3 23/24 STM6524 Please Read Carefully: 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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