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M68AW512M 8 Mbit (512K x16) 3.0V Asynchronous SRAM FEATURES SUMMARY SUPPLY VOLTAGE: 2.7 to 3.6V 512K x 16 bits SRAM with OUTPUT ENABLE EQUAL CYCLE and ACCESS TIME: 55ns SINGLE BYTE READ/WRITE LOW STANDBY CURRENT LOW VCC DATA RETENTION: 1.5V TRI-STATE COMMON I/O AUTOMATIC POWER DOWN Figure 1. Package 44 1 TSOP44 Type II (ND) September 2004 1/19 M68AW512M TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2. Table 1. Figure 3. Figure 4. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 TSOP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Read Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Write Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 3. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 4. Operating and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 5. AC Measurement I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. AC Measurement Load Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 5. Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 6. DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 7. Address Controlled, Read Mode AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 8. Chip Enable or Output Enable Controlled, Read Mode AC Waveforms.. . . . . . . . . . . . . 10 Figure 9. Chip Enable or UB/LB Controlled, Standby Mode AC Waveforms . . . . . . . . . . . . . . . . . 10 Table 7. Read and Standby Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 10.Write Enable Controlled, Write AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 11.Chip Enable Controlled, Write AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 12.UB/LB Controlled, Write AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 8. Write Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 13.Low VCC Data Retention AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 9. Low VCC Data Retention Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 14.TSOP44 Type II - 44 lead Plastic Thin Small Outline Type II, Package Outline . . . . . . . 16 Table 10. TSOP 44 TypeII - 44 lead Plastic Thin Small Outline TypeII, Package Mechanical Data 16 PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 11. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 REVISION HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 12. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 M68AW512M SUMMARY DESCRIPTION The M68AW512M is a 8 Mbit (8,388,608 bit) CMOS SRAM, organized as 524,288 words by 16 bits. The device features fully static operation requiring no external clocks or timing strobes, with equal address access and cycle times. It requires a single 2.7 to 3.6V supply. This device has an automatic power-down feature, reducing the power consumption by over 99% when deselected. The M68AW512M is available in TSOP44 Type II packages. Figure 2. Logic Diagram VCC Table 1. Signal Names A0-A16 DQ0-DQ15 Address Inputs Data Input/Output Chip Enable Output Enable Write Enable Upper Byte Enable Input Lower Byte Enable Input Supply Voltage Ground Not Connected Internally Don't Use as Internally Connected 19 A0-A18 W E M68AW512M G UB LB 16 DQ0-DQ15 E G W UB LB VCC VSS NC DU VSS AI05835c 3/19 M68AW512M Figure 3. TSOP Connections A4 A3 A2 A1 A0 E DQ0 DQ1 DQ2 DQ3 VCC VSS DQ4 DQ5 DQ6 DQ7 W A18 A17 A16 A15 A14 44 1 2 43 42 3 4 41 5 40 6 39 7 38 8 37 9 36 10 35 11 34 M68AW512M 12 33 13 32 14 31 15 30 16 29 28 17 27 18 26 19 25 20 24 21 22 23 AI05836c A5 A6 A7 G UB LB DQ15 DQ14 DQ13 DQ12 VSS VCC DQ11 DQ10 DQ9 DQ8 A8 A9 A10 A11 A12 A13 4/19 M68AW512M Figure 4. Block Diagram VCC VSS ROW DECODER A7 MEMORY ARRAY A18 DQ15 UB (8) I/O CIRCUITS COLUMN DECODER DQ0 LB (8) A0 (8) W E (8) LB G UB A6 UB LB AI05838 5/19 M68AW512M OPERATION The M68AW512M has a Chip Enable power down feature which invokes an automatic standby mode whenever either Chip Enable is de-asserted (E = High) or LB and UB are de-asserted (LB and UB = High). An Output Enable (G) signal provides a high speed tri-state control, allowing fast read/ write cycles to be achieved with the common I/O data bus. Operational modes are determined by device control inputs W, E, LB and UB as summarized in the Operating Modes table (see Table 2). Read Mode The M68AW512M is in the Read mode whenever Write Enable (W) is High with Output Enable (G) Low, and Chip Enable (E) is asserted. This provides access to data from eight or sixteen, depending on the status of the signal UB and LB, of the 8,388,608 locations in the static memory array, specified by the 19 address inputs. Valid data will be available at the eight or sixteen output pins within tAVQV after the last stable address, providing G is Low and E is Low. If Chip Enable or Output Enable access times are not met, data access will be measured from the limiting parameter (tELQV, tGLQV or tBLQV) rather than the address. Data out may be indeterminate at tELQX, tGLQX and tBLQX but data lines will always be valid at tAVQV. Table 2. Operating Modes Operation Deselected Deselected Lower Byte Read Lower Byte Write Output Disabled Upper Byte Read Upper Byte Write Word Read Word Write Note: 1. X = VIH or VIL. Write Mode The M68AW512M is in the Write mode whenever the W and E are Low. Either the Chip Enable input (E) or the Write Enable input (W) must be deasserted during Address transitions for subsequent write cycles. When E (W) is Low, and UB or LB is Low, write cycle begins on the W (E)'s falling edge. When E and W are Low, and UB = LB = High, write cycle begins on the first falling edge of UB or LB. Therefore, address setup time is referenced to Write Enable, Chip Enable or UB/LB as tAVWL, tAVEL and tAVBL respectively, and is determined by the latter occurring edge. The Write cycle can be terminated by the earlier rising edge of E, W or UB/LB. If the Output is enabled (E = Low, G = Low, LB or UB = Low), then W will return the outputs to high impedance within tWLQZ of its falling edge. Care must be taken to avoid bus contention in this type of operation. Data input must be valid for tDVWH before the rising edge of Write Enable, or for tDVEH before the rising edge of E, or for tDVBH before the rising edge of UB/LB whichever occurs first, and remain valid for tWHDX, tEHDX and tBHDX respectively. E VIH X VIL VIL VIL VIL VIL VIL VIL W X X VIH VIL VIH VIH VIL VIH VIL G X X VIL X VIH VIL X VIL X LB X VIH VIL VIL X VIH VIH VIL VIL UB X VIH VIH VIH X VIL VIL VIL VIL DQ0-DQ7 Hi-Z Hi-Z Data Output Data Input Hi-Z Hi-Z Hi-Z Data Output Data Input DQ8-DQ15 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Data Output Data Input Data Output Data Input Power Standby (ISB) Standby (ISB) Active (ICC) Active (ICC) Active (ICC) Active (ICC) Active (ICC) Active (ICC) Active (ICC) 6/19 M68AW512M MAXIMUM RATING Stressing the device above the rating listed in the Absolute Maximum Ratings table 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 the Operating sections of this specification is not imTable 3. Absolute Maximum Ratings Symbol IO (1) TA TSTG VCC VIO (2) PD Output Current Ambient Operating Temperature Storage Temperature Supply Voltage Input or Output Voltage Power Dissipation Parameter Value 20 -55 to 125 -65 to 150 -0.5 to 4.6 -0.5 to VCC +0.5 1 Unit mA C C V V W plied. Exposure to Absolute Maximum Rating conditions for periods greater than 1 sec periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Note: 1. One output at a time, not to exceed 1 second duration. 2. Up to a maximum operating VCC of 3.6V only. 7/19 M68AW512M DC AND AC PARAMETERS This section summarizes the operating and measurement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC Characteristic tables are derived from tests performed under the Measurement Conditions listed in the relevant tables. Designers should check that the operating conditions in their projects match the measurement conditions when using the quoted parameters. Table 4. Operating and AC Measurement Conditions Parameter VCC Supply Voltage Range 1 Ambient Operating Temperature Range 6 Load Capacitance (CL) Output Circuit Protection Resistance (R1) Load Resistance (R2) Input Rise and Fall Times Input Pulse Voltages Input and Output Timing Ref. Voltages Output Transition Timing Ref. Voltages -40 to 85C 30pF 3.0k 3.1k 1ns/V 0 to VCC VCC/2 VRL = 0.3VCC; VRH = 0.7VCC M68AW512M 2.7 to 3.6V 0 to 70C Figure 5. AC Measurement I/O Waveform Figure 6. AC Measurement Load Circuit VCC I/O Timing Reference Voltage VCC VCC/2 0V DEVICE UNDER TEST R1 OUT CL Output Timing Reference Voltage VCC 0.7VCC 0.3VCC AI05831 R2 0V CL includes probe and 1 TTLcapacitance AI05832 8/19 M68AW512M Table 5. Capacitance Symbol CIN COUT Parameter(1,2) Input Capacitance on all pins (except DQ) Output Capacitance Test Condition VIN = 0V VOUT = 0V Min Max 8 10 Unit pF pF Note: 1. Sampled only, not 100% tested. 2. At TA = 25C, f = 1 MHz, VCC = 3.0V. Table 6. DC Characteristics Symbol ICC1 (1,2) ICC2 (3) Parameter Operating Supply Current Test Condition VCC = 3.6V, f = 1/tAVAV, IOUT = 0mA 70ns 55ns Min Typ Max 35 40 4 Unit mA mA mA Operating Supply Current VCC = 3.6V, f = 1MHz, IOUT = 0mA VCC = 3.6V, f = 0, E VCC -0.2V or LB=UB VCC -0.2V 0V VIN VCC 0V VOUT VCC (4) -1 -1 2.2 -0.3 IOH = -1.0mA IOL = 2.1mA 2.4 1 ISB ILI ILO VIH VIL VOH VOL Note: 1. 2. 3. 4. Standby Supply Current CMOS Input Leakage Current Output Leakage Current Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage 20 1 1 VCC + 0.3 0.6 A A A V V V 0.4 V Average AC current, cycling at tAVAV minimum. E = VIL, LB OR/AND UB = VIL, VIN = VIL OR VIH. E 0.2V, LB OR/AND UB 0.2V, VIN 0.2V OR VIN VCC -0.2V. Output disabled. 9/19 M68AW512M Figure 7. Address Controlled, Read Mode AC Waveforms tAVAV A0-A18 tAVQV VALID tAXQX DQ0-DQ7 and/or DQ8-DQ15 DATA VALID AI05839 Note: E = Low, G = Low, W = High, UB = Low and/or LB = Low. Figure 8. Chip Enable or Output Enable Controlled, Read Mode AC Waveforms. tAVAV A0-A18 tAVQV tELQV E tELQX tGLQV G tGLQX DQ0-DQ15 tBLQV UB, LB tBLQX AI05840 VALID tAXQX tEHQZ tGHQZ VALID tBHQZ Note: Write Enable (W) = High. Figure 9. Chip Enable or UB/LB Controlled, Standby Mode AC Waveforms E, UB, LB ICC ISB tPU 50% tPD AI03856 10/19 M68AW512M Table 7. Read and Standby Mode AC Characteristics M68AW512M Symbol tAVAV tAVQV tAXQX (1) tBHQZ (2,3) tBLQV tBLQX (1) tEHQZ (2,3) tELQV tELQX (1) tGHQZ (2,3) tGLQV tGLQX (2) tPD (4) tPU (4) Read Cycle Time Address Valid to Output Valid Data hold from address change Upper/Lower Byte Enable High to Output Hi-Z Upper/Lower Byte Enable Low to Output Valid Upper/Lower Byte Enable Low to Output Transition Chip Enable High to Output Hi-Z Chip Enable Low to Output Valid Chip Enable Low to Output Transition Output Enable High to Output Hi-Z Output Enable Low to Output Valid Output Enable Low to Output Transition Chip Enable or UB/LB High to Power Down Chip Enable or UB/LB Low to Power Up Parameter 55 Min Max Min Max Max Min Max Max Min Max Max Min Max Min 55 55 5 20 55 5 20 55 5 20 25 5 55 0 70 70 70 5 25 70 5 25 70 5 25 35 5 70 0 ns ns ns ns ns ns ns ns ns ns ns ns ns ns Unit Note: 1. Test conditions assume transition timing reference level = 0.3VCC or 0.7VCC. 2. At any given temperature and voltage condition, tGHQZ is less than tGLQX, tBHQZ is less than tBLQX and tEHQZ is less than tELQX for any given device. 3. These parameters are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output voltage levels. 4. Tested initially and after any design or process changes that may affect these parameters. 11/19 M68AW512M Figure 10. Write Enable Controlled, Write AC Waveforms tAVAV A0-A18 VALID tAVWH tELWH E tWLWH tAVWL W tWLQZ tWHDX DQ0-DQ15 DATA (1) DATA INPUT tDVWH tBLWH UB, LB AI05841 tWHAX tWHQX DATA (1) Note: 1. During this period DQ0-DQ15 are in output state and input signals should not be applied. Figure 11. Chip Enable Controlled, Write AC Waveforms tAVAV A0-A18 VALID tAVEH tAVEL E tWLEH W tEHDX DQ0-DQ15 DATA INPUT tDVEH tBLEH UB, LB AI05842 tELEH tEHAX 12/19 M68AW512M Figure 12. UB/LB Controlled, Write AC Waveforms tAVAV A0-A18 VALID tAVBH tELBH E tWLBH W tBHDX DQ0-DQ15 DATA (1) DATA INPUT tDVBH tAVBL UB, LB AI05843 tBHAX tBLBH Note: 1. During this period DQ0-DQ15 are in output state and input signals should not be applied. 13/19 M68AW512M Table 8. Write Mode AC Characteristics M68AW512M Symbol tAVAV tAVBH tAVBL tAVEH tAVEL tAVWH tAVWL tBHAX tBHDX tBLBH tBLEH tBLWH tDVBH tDVEH tDVWH tEHAX tEHDX tELBH tELEH tELWH tWHAX tWHDX tWHQX (1) tWLBH tWLEH tWLQZ (1,2) tWLWH Write Cycle Time Address Valid to LB, UB High Address Valid to LB, UB Low Address Valid to Chip Enable High Address valid to Chip Enable Low Address Valid to Write Enable High Address Valid to Write Enable Low LB, UB High to Address Transition LB, UB High to Input Transition LB, UB Low to LB, UB High LB, UB Low to Chip Enable High LB, UB Low to Write Enable High Input Valid to LB, UB High Input Valid to Chip Enable High Input Valid to Write Enable High Chip Enable High to Address Transition Chip enable High to Input Transition Chip Enable Low to LB, UB High Chip Enable Low to Chip Enable High Chip Enable Low to Write Enable High Write Enable High to Address Transition Write Enable High to Input Transition Write Enable High to Output Transition Write Enable Low to LB, UB High Write Enable Low to Chip Enable High Write Enable Low to Output Hi-Z Write Enable Low to Write Enable High Parameter 55 Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Min Max Min 55 45 0 45 0 45 0 0 0 45 45 45 25 25 25 0 0 45 45 45 0 0 5 45 45 20 45 70 70 60 0 60 0 60 0 0 0 60 60 60 30 30 30 0 0 60 60 60 0 0 5 60 60 20 60 ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Unit Note: 1. At any given temperature and voltage condition, tWLQZ is less than tWHQX for any given device. 2. These parameters are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output voltage levels. 14/19 M68AW512M Figure 13. Low VCC Data Retention AC Waveforms DATA RETENTION MODE 3.6V VCC 2.7V VDR > 1.5V tCDR E VDR - 0.2V or UB = LB VDR - 0.2V E or UB/LB tR AI05805 Table 9. Low VCC Data Retention Characteristics Symbol Parameter Test Condition VCC = 1.5V, E VCC -0.2V or UB = LB VCC -0.2V, f = 0 (3) 0 tAVAV E VCC -0.2V or UB = LB VCC -0.2V, f = 0 1.5 Min Typ 5 Max 10 Unit A ns ns V ICCDR (1) Supply Current (Data Retention) Chip Deselected to Data tCDR (1,2) Retention Time tR (2) VDR (1) Operation Recovery Time Supply Voltage (Data Retention) Note: 1. All other Inputs at VIH VCC -0.2V or VIL 0.2V. 2. Tested initially and after any design or process changes that may affect these parameters. tAVAV is Read cycle time. 3. No input may exceed VCC +0.2V. 15/19 M68AW512M PACKAGE MECHANICAL Figure 14. TSOP44 Type II - 44 lead Plastic Thin Small Outline Type II, Package Outline D N E1 E 1 N/2 ZD b e A A2 C CP A1 L TSOP-d Note: Drawing is not to scale. Table 10. TSOP 44 TypeII - 44 lead Plastic Thin Small Outline TypeII, Package Mechanical Data Symbol Typ A A1 A2 b c D e E E1 L ZD CP N 44 18.410 0.800 11.760 10.160 0.500 0.805 0.350 0.120 - - - - 0.400 - 0 0.210 - - - - 0.600 - 5 0.100 44 0.7248 0.0315 0.4630 0.4000 0.0197 0.0317 0.050 0.950 millimeters Min Max 1.200 0.150 1.050 0.0138 0.0047 - - - - 0.0157 - 0 0.0083 - - - - 0.0236 - 5 0.0039 0.0020 0.0374 Typ inches Min Max 0.0472 0.0059 0.0413 16/19 M68AW512M PART NUMBERING Table 11. Ordering Information Scheme Example: Device Type M68 Mode A = Asynchronous Operating Voltage W = 2.7 to 3.6V Array Organization 512 = 8 Mbit (512K x16) Option 1 M = 1 Chip Enable; Write and Standby from UB and LB Option 2 L = L-Die N = N-Die Speed Class 55 = 55 ns 70 = 70 ns Package ND = TSOP 44 Type II Operating Temperature 1 = 0 to 70 C 6 = -40 to 85 C Shipping T = Tape & Reel Packing M68AW512 M L 55 ND 6 T For a list of available options (Speed, Package, etc.) or for further information on any aspect of this device, please contact the STMicroelectronics Sales Office nearest to you. 17/19 M68AW512M REVISION HISTORY Table 12. Document Revision History Date January 2002 15-Mar-2002 17-Jun-2002 Version -01 -02 -03 First Issue Document status moved to Datasheet Tables 3, 2, 7, 8 and 9 clarified ISB clarified (Table 6) ICCDR, VDR clarified (Table 9) Revision numbering modified: a minor revision will be indicated by incrementing the digit after the dot, and a major revision, by incrementing the digit before the dot (revision version 03 equals 3.0). New part number added. Commercial code modified. tPD and tPU modified in Table 7., Read and Standby Mode AC Characteristics. Document structure updated without modifications of the content. Revision Details 03-Oct-2002 3.1 09-Oct-2002 27-Sep-2004 3.2 4.0 18/19 M68AW512M Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2004 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 - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 19/19 |
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