STM6904SYEDS6F

STM6904 Quad, ultralow voltage supervisor with push-button reset Features ■ Quad voltage monitoring ■ Accurate ±1.8% across temperature voltage threshold (±1% at 25 °C) ■ Primary supply (VCC) monitor. Fixed (factory programmed) reset thresholds: 3.078 to 2.188 V ■ Second fixed (V2IN) monitor. Fixed (factoryprogrammed) reset thresholds: 2.333 to 1.110 V ■ Two additional adjustable supply monitor inputs (externally adjustable) ■ 0.6 V internal reference ■ RST output (open drain) ■ Output guaranteed for VCC ≥ 0.8 V ■ Reset delay time (tREC) pin selectable ■ Manual reset input (MR) ■ Low supply current of 12 µA (typ) ■ Set-top boxes ■ Power supply voltage 0.8 to 5.5 V ■ Multi-voltage systems ■ RoHS compliant (green package) ■ Cable/satellite applications ■ 8-pin MSOP/TSSOP ■ Computer systems ■ Operating temperature: –40 to 85 °C (industrial grade) ■ Data storage equipment Table 1. MSOP8 (TSSOP8) (DS) Applications Device summary(1) Order code VRST1 (V) VRST2 (V) tREC (ms) Package STM6904TZEDS6F 3.078 2.333 210 MSOP8(TSSOP8) STM6904TWEDS6F 3.078 1.683 210 MSOP8(TSSOP8) STM6904TGEDS6F 3.078 1.110 210 MSOP8(TSSOP8) STM6904SYEDS6F 2.955 2.188 210 MSOP8(TSSOP8) STM6904SFEDS6F 2.955 1.050 210 MSOP8(TSSOP8) STM6904PWEDS6F 2.866 1.683 210 MSOP8(TSSOP8) 1. Other reset threshold voltages and tREC timeout periods are offered. Minimum order quantities may apply. Contact local ST sales office for availability. December 2011 Doc ID 14289 Rev 3 1/20 www.st.com 1 Contents STM6904 Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 2.1 Push-button reset input (MR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 VCC primary supply voltage monitoring input . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 V2IN second fixed voltage monitoring input . . . . . . . . . . . . . . . . . . . . . . . . 7 2.4 VSS 2.5 V3IN and V4IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.6 RST active-low, open drain reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.7 TRSEL input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 .....................................................................7 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1 Setting the adjustable voltage levels for V3IN and V4IN inputs . . . . . . . . . 9 3.2 Power on reset (tREC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Voltage monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 9 Package marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 Doc ID 14289 Rev 3 STM6904 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Signal names and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TSSOP 8-lead package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marking description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Doc ID 14289 Rev 3 .....1 .....6 . . . . 11 . . . . 12 . . . . 15 . . . . 17 . . . . 18 . . . . 19 3/20 List of figures STM6904 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. 4/20 Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MSOP/TSSOP-8 connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Typical hardware hookup application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 MR timing waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Voltage monitoring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 TSSOP8, 3 x 3mm, package mechanical outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Doc ID 14289 Rev 3 STM6904 1 Description Description The STM6904 supervisor is a low voltage/low supply current processor supervisor, designed to monitor up to four system power supply voltages. This device is targeted at applications such as “Set-Top Boxes” (STBs), portable, battery-powered systems, networking and communication systems. The device supports a push-button type manual reset input (MR). Two of the four supply monitors (VCC and V2IN) have fixed (customer-selectable, factory-trimmed) thresholds (VRST1 and VRST2). The other two voltage monitor inputs (V3IN and V4IN) are monitored using externally adjustable threshold (0.600 V internal reference) to meet specific level requirements. If any of the four monitored voltages drops below its factory-trimmed or adjustable thresholds, or if the MR is asserted to logic low, the reset output RST is asserted (driven low). Once asserted, RST is maintained low for a minimum delay period (tREC) after ALL monitored supplies rise above their respective thresholds and MR returns to high. This device is in the correct reset output logic state when VCC greater than 0.8 V. The STM6904 is available in a standard 8-lead MSOP (TSSOP) package. Figure 1. Logic diagram VCC V2IN V3IN V4IN RST STM6904 MR TRSEL VSS ai13976 Figure 2. MSOP/TSSOP-8 connections MR 1 8 RST VCC 2 7 TRSEL V2IN 3 6 V4IN VSS 4 5 V3IN ai13977 Doc ID 14289 Rev 3 5/20 Description STM6904 Table 2. 6/20 Signal names and functions Pin Name Type 1 MR Input 2 VCC Supply 3 V2IN Input 4 VSS Supply 5 V3IN Input Adjustable third reset comparator input 6 V4IN Input Adjustable fourth reset comparator input Controls selectable tREC. Two tREC options available. If pin is tied high (VCC), tREC = 420 ms If pin is tied low (VSS), tREC = 210 ms Note: Pin must be tied to VCC or VSS (do not float) 7 TRSEL Input 8 RST Output Function Active-low manual reset input with internal pull-up resistor Primary supply voltage input and integrated fixed threshold undervoltage monitor Second fixed threshold input monitor Ground Active-low open drain reset output (10 kΩ internal pull-up) Doc ID 14289 Rev 3 STM6904 Pin descriptions 2 Pin descriptions 2.1 Push-button reset input (MR) When MR goes low the RST output is driven low, RST remains low as long as MR is low and for tREC after MR returns to high. The active-low input has an internal 10 kΩ pull-up resistor to VCC. It can be driven from a TTL or CMOS logic line, or with open drain/collector outputs, or connected to VSS through a switch. If unused, leave this pin open or connect it to VCC. Connect a normally open momentary switch from MR to VSS; external debounce circuitry is not required. (If MR is driven from long cables or if the device is used in noisy environments, connecting a 0.1 μF capacitor from MR to VSS provides additional noise immunity). 2.2 VCC primary supply voltage monitoring input The VCC pin is also the input for the primary reset threshold monitor. Fixed (customerselectable, factory programmed) reset thresholds include 3.078 to 2.866 V. 2.3 V2IN second fixed voltage monitoring input The V2IN input is the second fixed-voltage input for reset threshold monitoring. Available fixed (customer-selectable, factory programmed) reset thresholds include 2.333 to 1.050 V. 2.4 VSS This pin is the ground pin for the power supply. 2.5 V3IN and V4IN The V3IN and V4IN are high impedance inputs. RST is driven low when the voltage (VTRIP) at the pin falls below 600 mV (internal reference voltage at their respective comparators). The monitored voltage reset threshold is set with an external resistor divider network. 2.6 RST active-low, open drain reset output The reset output (RST) pin is driven low and stays low whenever VCC or V2IN, or V3IN, or V4IN falls below its factory-trimmed or adjustable reset threshold or when MR goes to logic low. It remains low for tREC after all supply voltages being monitored rise above their reset thresholds and MR goes from low to high. Connect an external pull-up resistor to VCC. A 10 kΩ pull-up resistor should be sufficient for most applications. 2.7 TRSEL input Allows user to select between two values of tREC timing (210 or 420 ms). Pin must be tied to VSS (210 ms) or VCC (420 ms). Doc ID 14289 Rev 3 7/20 Pin descriptions Figure 3. STM6904 Functional block diagram 6## 6234 #/-0!2% 6234 #/-0!2% 6). T2%# GENERATOR 6). 62%&6 #/-0!2% 62%&6 #/-0!2% 234 6). 6##  -2 42 3%, AI6 1. Internal pull-up on MR input of 10 kΩ (typ.). Figure 4. Typical hardware hookup application diagram &ROM$#$#CONVERTER 6## 6## 6## 6 42)0  M6  22 2 6 42)0  M6  22 2  & 34- 6). 6##  & 234 234TOPROCESSORRESET 2 6). 6## 2 2 -2 6). 2 0USH BUTTON SWITCH 6## 42 3%, 633 AI6 1. TRSEL must be tied to VCC (tREC = 420 ms) or to VSS (tREC = 210 ms). 8/20 Doc ID 14289 Rev 3 STM6904 3 Operation Operation The STM6904 provides the ability to monitor critical voltages such as power-supply and battery voltage levels, while interfacing easily to the system controllers/microprocessors. Figure 4 shows typical hardware hookup for monitoring four voltages; two fixed thresholds (customer-selectable, factory-programmed) and two adjustable monitor inputs. RST output is open drain and requires a 10 kΩ pull-up resistor tied to VCC. 3.1 Setting the adjustable voltage levels for V3IN and V4IN inputs The user can customize the minimum voltage levels for the two adjustable voltage inputs by connecting an external resistor divider network to the V3IN and V4IN pins in order to set the trip point at some voltage above the 600 mv (VREF) according to the following formula: R1 + R2 V TRIP = 0.6V × ---------------------R2 During normal operation, the STM6904 monitors the voltage levels at all four pins (VCC, V2IN, V3IN, and V4IN). 3.2 Power on reset (tREC) On power up, the STM6904 activates a power on reset circuit which asserts the reset pin (i.e. RST goes low). The RST signal remains active until VCC (and V2IN, V3IN, V4IN and MR) rises above the minimum voltage level for the time period tREC thereby ensuring that the supply voltage has stabilized to sufficient operating levels. Doc ID 14289 Rev 3 9/20 Voltage monitoring STM6904 4 Voltage monitoring Figure 5. MR timing waveforms tMLMH MR tMLMR RST tREC ai13974 Figure 6. Voltage monitoring diagram 6##6X). 6234 6234). T 2$ T 2%# 234 AI6 10/20 Doc ID 14289 Rev 3 STM6904 5 Maximum rating Maximum rating Stressing the device above the rating listed in Table 3: 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 Section 6: DC and AC parameters 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 3. Absolute maximum ratings Symbol TSTG TSLD(1) Parameter Storage temperature (VCC off) Lead solder temperature for 10 seconds Value Unit -55 to +150 °C 260 °C -0.3 to VCC +0.3 V VIO Input or output voltage VCC Supply voltage -0.3 to 7.0 V IO Output current 20 mA θ JA Thermal resistance (junction to ambient) 146 °C/W 1. Reflow at peak temperature of 255 to 260 °C for < 30 seconds (total thermal budget not to exceed 180 °C for between 90 to 150 seconds). Doc ID 14289 Rev 3 11/20 DC and AC parameters 6 STM6904 DC and AC parameters This section summarizes the operating measurement conditions and the DC and AC characteristics of the device. Designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. Table 4. Symbol DC and AC characteristics Alternative Description VCC Operating voltage ICC VCC supply current I2IN V2IN supply current ILI ILO(3) Min. Typ. 0.8 Max. Unit 5.5 V VCC < 5.5 V 10 14 VCC = 3.3 V 9 13 V2IN = 3.3 V 3 5 µA Input leakage current (MR)(2) VIN = VSS 500 800 µA Input leakage current (TRSEL) VIN = VSS or VCC -0.5 +0.5 µA Open drain RST output leakage current VCC > VRST; RST not asserted -0.5 +0.5 µA VCC ≥ 0.8 V, ISINK = 1 µA 0.3 V VCC ≥ 1.0 V, ISINK = 50 µA 0.3 V VCC ≥ 1.2 V, ISINK = 100 µA 0.3 V VCC ≥ 2.7 V, ISINK = 1.2 mA 0.3 V VCC ≥ 4.5 V, ISINK = 3.2 mA 0.4 V 3.109 V Output low voltage (RST; open drain) VOL Test condition(1) µA 25 °C 3.047 -40 to 85 °C 3.023 25 °C 2.925 -40 to 85 °C 2.902 25 °C 2.837 -40 to 85 °C 2.814 3.078 T (falling) VRST1(4) VTH1 VCC reset threshold 3.133 2.955 2.985 3.008 2.866 2.895 P (falling) 12/20 V S (falling) Doc ID 14289 Rev 3 2.918 V STM6904 Table 4. Symbol DC and AC parameters DC and AC characteristics (continued) Alternative Description Test condition(1) Min. Typ. Max. 25 °C 2.310 2.333 2.356 -40 to 85 °C 2.291 25 °C 2.166 -40 to 85 °C 2.149 25 °C 1.666 -40 to 85 °C 1.653 25 °C 1.099 -40 to 85 °C 1.090 25 °C 1.040 -40 to 85 °C 1.031 Z (falling) V 2.375 2.188 2.210 Y (falling) VRST2(4) VTH2 V2IN reset threshold V 2.227 1.683 1.700 W (falling) V 1.713 1.110 1.121 G (falling) V 1.130 1.050 1.061 F (falling) Reset threshold hysteresis VHYST tRD tREC(5) VCC to RST delay tRP RST timeout period Unit V 1.069 Referenced to VRST1/VRST2 typical 0.5 % VCC = (VRST1 + 100 mV) to (VRST1 – 100 mV) 20 µs V2IN = (VRST2 + 75 mV) to (VRST2 – 75 mV) 20 µs TRSEL = LOW (VSS) 140 210 280 ms TRSEL = HIGH (VCC) 280 420 560 ms 589 600 611 mV +25 nA Adjustable reset comparator input (V3IN and V4IN) V3IN, V4IN input threshold VRSTIN I3IN, I4IN V3IN, V4IN input current V3IN, V4IN > 0.8 V -25 V3IN, V4IN hysteresis V3IN, V4IN to RST output delay tRSTIND VRSTIN to (VRSTIN – 30 mV) 3 mV 22 µs Manual (push-button) reset input VIL 0.3 x VCC MR input voltage VIH tMLMH tMR MR minimum pulse width tMLRL tMRD MR to RST output delay 0.7 x VCC V 1 µs 200 Doc ID 14289 Rev 3 V ns 13/20 DC and AC parameters Table 4. Symbol STM6904 DC and AC characteristics (continued) Alternative Description Test condition(1) Min. Typ. Max. Unit MR glitch immunity 100 ns MR pull-up resistance 10 kΩ 1. Valid for ambient operating temperature: TA = –40 to +85 °C; VCC = 0.8 to 5.5 V (except where noted). 2. 10 kΩ (typ) internal pull-up resistor. 3. The leakage current measured on the RST pin is tested with the reset de-asserted (output high impedance). 4. Other reset threshold voltages are offered. Minimum order quantities may apply. Contact local sales office for availability. 5. Other tREC timeout periods are offered. Minimum order quantities may apply. Contact local sales office for availability. 14/20 Doc ID 14289 Rev 3 STM6904 7 Package mechanical data 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® is an ST trademark. Figure 7. TSSOP8, 3 x 3mm, package mechanical outline D 8 5 c E1 1 E 4 k A1 A L L2 A2 L1 ccc b e E3_ME Doc ID 14289 Rev 3 15/20 Package mechanical data Table 5. STM6904 TSSOP 8-lead package mechanical data mm inches Symbol Min. Typ. A 0.00 Typ. A2 0.75 b c Max. 0.043 0.15 0.000 0.95 0.030 0.22 0.40 0.009 0.016 0.08 0.23 0.003 0.009 0.85 ccc 0.006 0.034 0.10 2.80 e 3.00 3.20 0.037 0.004 0.110 0.65 0.118 0.126 0.026 E 4.65 4.90 5.15 0.183 0.193 0.203 E1 2.80 3.00 3.10 0.110 0.118 0.122 L 0.40 0.60 0.80 0.016 0.024 0.032 L1 0.95 0.037 L2 0.25 0.010 k N 16/20 Min. 1.10 A1 D Max. 0° 4 6° 8 Doc ID 14289 Rev 3 0° 4 8 6° STM6904 8 Part numbering Part numbering Table 6. Ordering information scheme Example: STM6904 TZ E DS 6 F Device type STM6904 Reset threshold voltages(1) Suffix VRST1 VRST2 TZ 3.078 2.333 TW 3.078 1.683 TG 3.078 1.110 SY 2.955 2.188 SF 2.955 1.050 PW 2.866 1.683 tREC(1) E = 210 or 420 ms Package DS = MSOP8 (TSSOP8) Temperature range 6: -40 to 85 °C Shipping method E = ECOPACK® package, tubes F = ECOPACK® package, tape and reel 1. Other reset threshold voltages and tREC timeout periods are offered. Minimum order quantities may apply. Contact local sales office for availability. Doc ID 14289 Rev 3 17/20 Package marking information STM6904 9 Package marking information Table 7. Marking description Part marking VRST1 (V) VRST2 (V) Package Topside marking STM6904TZEDS6F 3.078 2.333 MSOP (TSSOP8) STZ4 STM6904TWEDS6F 3.078 1.683 MSOP (TSSOP8) STW4 STM6904TGEDS6F 3.078 1.110 MSOP (TSSOP8) STG4 STM6904SFEDS6F 2.955 1.050 MSOP (TSSOP8) SSF4 STM6904SYEDS6F 2.955 2.188 MSOP (TSSOP8) SSY4 STM6904PWEDS6F 2.866 1.683 MSOP (TSSOP8) SPW4 18/20 Doc ID 14289 Rev 3 STM6904 10 Revision history Revision history Table 8. Document revision history Date Revision Changes 19-Dec-2007 1 Initial release. 28-Jan-2008 2 Updated cover page, Figure 6 and Table 4. 16-Dec-2011 3 Removed label “Preliminary Data”, document reformatted, minor text corrections throughout document, updated Section 6, ECOPACK® and Disclaimer. Doc ID 14289 Rev 3 19/20 STM6904 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 20/20 Doc ID 14289 Rev 3