EM MICROELECTRONIC - MARIN SA EM6325 Reset Circuit with Manual Reset Description Features The EM6325 is an ultra-low current reset circuit available in a large variety of configurations and very small packages for maximum flexibility in all end-applications up to 125°C and using power supplies between 1.5V and 5.5V. This circuit monitors the supply voltage of any electronic system, and generates the appropriate reset signal after a fixed reset timeout period. The threshold defines the minimum allowed voltage which guarantees the good functionality of the system. When VDD rises above VTH, the output remains active for an additional delay time. This allows the system to stabilize before getting fully active. This circuit features a Manual Reset: an input that asserts reset when pulled low ( MR with internal pull-up). Small SC70-4L, SC70-5L and SOT23-5L packages as well as ultra-low supply current of 2.9μA make the EM6325 an ideal choice for portable and battery-operated devices. RESET EM6325 MR RESET VDD * VDD Applications MPU, DSP RESET GND GND * REXT for open-drain version only Block Diagram VDD Oscillator + Reset Logic - Computers Servers and workstations Modems Wireless communication Metering Playstations PDA , Webpad Automotive systems Pin Configuration (top view) RESET RESET RESET 1 GND 2 RESET 3 push-pull / open-drain Filter MR Active-high RESET push-pull Immune to short negative VDD transients Guaranteed Reset valid down to 0.9V Threshold hysteresis: 2.1% of VTH Very small SOT23-5L, SC70-5L and SC70-4L RESET GND Voltage Reference ±1.5% reset threshold accuracy 11 reset threshold voltages VTH: 4.63V, 4.4V, 3.08V, 2.93V, 2.63V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V 3 reset output options: Active-low RESET push-pull Active-low RESET open-drain Typical Application VDD Manual reset function 200ms reset timeout period (1.6ms, 25ms, 1600ms on request) Ultra-low supply current of 2.9μA (VDD=3.3V) Operating temperature range: -40°C to +125°C 5 VDD 4 MR push-pull SOT23-5 / SC70-5 GND top view GND 1 4 VDD RESET (RESET) 2 3 MR SC70-4 top view Pin Description Pin SOT23-5L / SC70-5L SC70-4L Name Function Active-low RESET output. RESET remains low for the reset timeout period and 1 2 RESET 2 1 GND 3 2 RESET 4 3 MR 5 4 VDD Copyright © 2005, EM Microelectronic-Marin SA then goes high after all reset conditions are deasserted or after MR goes from low to high Ground Active-high RESET output. RESET remains high for the reset timeout period and then goes low after all reset conditions are deasserted or after MR goes from low to high Manual Reset input with an internal pull-up 15kΩ resistor. Reset remains active as long as MR is low and for tPOR after MR returns high. MR can be driven with a CMOS output or shorted to ground with a switch Supply Voltage (5.5V max.) 1 www.emmicroelectronic.com EM6325 Ordering Information EM6325 C X SP5B - 2.9 + Delay (tPOR): C = 200ms A = 1.6ms RoHS Compliance: + = lead-free/green mold compliant [blank] = leaded B = 25ms D = 1600ms Reset Threshold Voltage (VTH): 1.3 = 1.31V 2.6 = 2.63V 1.4 = 1.38V 2.9 = 2.93V 1.6 = 1.57V 3.1 = 3.08V 1.7 = 1.66V 4.4 = 4.40V 1.8 = 1.80V 4.6 = 4.63V 2.2 = 2.20V Reset Output Type: X = Active-low /RES push-pull Active-high RES push-pull Y = Active-low /RES open-drain Active-high RES push-pull Z = Active-high RES push-pull Package: SP5B = SOT23-5, Tape&Reel 3000 pcs SC5B = SC70-5, Tape&Reel 3000 pcs SC4B = SC70-4, Tape&Reel 3000 pcs Top Marking Package top marking below is for most parts in leaded package (first letter is “A”). For lead-free/green mold (RoHS) parts, the first letter of top marking begins with letter “B” instead of letter “A”. The underscore "_ _" refers to the four-letter code for the package (eg. SP5B, SC4B, …). Part Number EM6325AX__-1.3 EM6325AX__-1.4 EM6325AX__-1.6 EM6325AX__-1.7 EM6325AX__-1.8 EM6325AX__-2.2 EM6325AX__-2.6 EM6325AX__-2.9 EM6325AX__-3.1 EM6325AX__-4.4 EM6325AX__-4.6 EM6325AY__-1.3 EM6325AY__-1.4 EM6325AY__-1.6 EM6325AY__-1.7 EM6325AY__-1.8 EM6325AY__-2.2 EM6325AY__-2.6 EM6325AY__-2.9 EM6325AY__-3.1 EM6325AY__-4.4 EM6325AY__-4.6 Top Marking ANAA ANAB ANAC ANAD ANAE ANAF ANAG ANAH ANAJ ANAK ANAL ANAM ANAN ANAP ANAQ ANAR ANAS ANAT ANAU ANAV ANAW ANAX Part Number EM6325BX__-1.3 EM6325BX__-1.4 EM6325BX__-1.6 EM6325BX__-1.7 EM6325BX__-1.8 EM6325BX__-2.2 EM6325BX__-2.6 EM6325BX__-2.9 EM6325BX__-3.1 EM6325BX__-4.4 EM6325BX__-4.6 EM6325BY__-1.3 EM6325BY__-1.4 EM6325BY__-1.6 EM6325BY__-1.7 EM6325BY__-1.8 EM6325BY__-2.2 EM6325BY__-2.6 EM6325BY__-2.9 EM6325BY__-3.1 EM6325BY__-4.4 EM6325BY__-4.6 Top Marking ANBA ANBB ANBC ANBD ANBE ANBF ANBG ANBH ANBJ ANBK ANBL ANBM ANBN ANBP ANBQ ANBR ANBS ANBT ANBU ANBV ANBW ANBX Part Number EM6325CX__-1.3 EM6325CX__-1.4 EM6325CX__-1.6 EM6325CX__-1.7 EM6325CX__-1.8 EM6325CX__-2.2 EM6325CX__-2.6 EM6325CX__-2.9 EM6325CX__-3.1 EM6325CX__-4.4 EM6325CX__-4.6 EM6325CY__-1.3 EM6325CY__-1.4 EM6325CY__-1.6 EM6325CY__-1.7 EM6325CY__-1.8 EM6325CY__-2.2 EM6325CY__-2.6 EM6325CY__-2.9 EM6325CY__-3.1 EM6325CY__-4.4 EM6325CY__-4.6 Top Marking ANCA ANCB ANCC ANCD ANCE ANCF ANCG ANCH ANCJ ANCK ANCL ANCM ANCN ANCP ANCQ ANCR ANCS ANCT ANCU ANCV ANCW ANCX Part Number EM6325DX__-1.3 EM6325DX__-1.4 EM6325DX__-1.6 EM6325DX__-1.7 EM6325DX__-1.8 EM6325DX__-2.2 EM6325DX__-2.6 EM6325DX__-2.9 EM6325DX__-3.1 EM6325DX__-4.4 EM6325DX__-4.6 EM6325DY__-1.3 EM6325DY__-1.4 EM6325DY__-1.6 EM6325DY__-1.7 EM6325DY__-1.8 EM6325DY__-2.2 EM6325DY__-2.6 EM6325DY__-2.9 EM6325DY__-3.1 EM6325DY__-4.4 EM6325DY__-4.6 Top Marking ANDA ANDB ANDC ANDD ANDE ANDF ANDG ANDH ANDJ ANDK ANDL ANDM ANDN ANDP ANDQ ANDR ANDS ANDT ANDU ANDV ANDW ANDX Standard Versions, Samples Sample stock is generally held on standard versions (below) only. Non standard versions have a 30,000 pieces minimum order quantity. Please contact factory for other versions not shown here and for availability of non standard versions. EM6325AXSC4B-2.9 EM6325CXSC5B-2.9 EM6325CXSP5B-1.3 EM6325CXSP5B-2.6 EM6325CXSP5B-2.9 EM6325CXSP5B-3.1 EM6325CYSP5B-2.9 EM6325CYSP5B-4.6 EM6325DXSC4B-2.6 EM6325CXSP5B-4.6 Copyright © 2005, EM Microelectronic-Marin SA 2 www.emmicroelectronic.com EM6325 Handling Procedures Absolute Maximum Ratings Parameter Voltage at VDD to GND Minimum voltage at any signal pin Maximum voltage at any signal pin Electrostatic discharge max. to MIL-STD-883C method 3015.7 with ref. to VSS Max. soldering conditions Storage Temperature Range Symbol Conditions VDD VMIN VMAX -0.3V to +6V GND - 0.3V VDD + 0.3V VESD 2000V TMAX TSTG 250°C x 10s -65°C to +150°C This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level. Operating Conditions Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Parameter Symbol Min Max Unit Supply voltage Operating Temperature VDD TA 0.9 -40 5.5 +125 V °C Electrical Characteristics Unless otherwise specified: VDD= 0.9V to 5.5V, TA=-40°C to +125°C (note 1). Parameter Symbol Conditions Min +25°C VDD=1.5V -40°C to +125°C +25°C VDD=3.3V -40°C to +125°C +25°C VDD=5.0V -40°C to +125°C +25°C EM6325 – 1.3 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 1.4 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 1.6 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 1.7 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 1.8 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 2.2 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 2.6 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 2.9 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 3.1 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 4.4 -40°C to +85°C -40°C to +125°C +25°C EM6325 – 4.6 -40°C to +85°C -40°C to +125°C TA=+25°C 1.290 1.245 1.221 1.359 1.311 1.286 1.546 1.492 1.463 1.635 1.577 1.547 1.773 1.710 1.678 2.167 2.090 2.050 2.591 2.499 2.451 2.886 2.784 2.731 3.034 2.926 2.871 4.334 4.180 4.101 4.561 4.399 4.315 - Supply current (note 2) Threshold voltage (note 3) Threshold hysteresis IDD VTH VHYS Typ 2.3 2.9 3.4 1.31 1.38 1.57 1.66 1.80 2.20 2.63 2.93 3.08 4.40 4.63 2.1%•VTH Max 4.6 7 5.5 8.3 6.3 9.6 1.330 1.382 1.387 1.401 1.456 1.461 1.594 1.656 1.663 1.685 1.751 1.758 1.827 1.899 1.906 2.233 2.321 2.330 2.669 2.775 2.785 2.974 3.091 3.103 3.126 3.249 3.262 4.466 4.642 4.660 4.699 4.885 4.903 - Unit μA V V Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested. Note 3: Threshold voltage is specified for VDD falling. Copyright © 2005, EM Microelectronic-Marin SA 3 www.emmicroelectronic.com EM6325 Electrical Characteristics (continued) Unless otherwise specified: VDD= 0.9V to 5.5V, TA=-40°C to +125° C (note 1). Parameter Reset timeout period Propagation delay time VDD to RESET (RESET) delay Open-drain RESET output Voltage Symbol tPOR tP VOL VOL Push-pull RESET / RESET Output voltage VOH Output leakage current ILEAK Conditions (note 2 and 4) VDD from 0V to VTH (typ)+15% TA= +25°C Min Typ Max EM6325C 155 200 224 EM6325A 0.7 1.6 3.8 EM6325B 19.4 25 28 EM6325D 1240 1600 1792 2 130 255 VDD drops from VTH (typ)+0.2V to VTH (typ)-0.2V (note 2). TA= +25°C VDD>1V IOL=100μA - - 0.3 VDD>2.5V IOL=1.5mA - - 0.3 VDD>5V IOL=3mA - - 0.35 Unit ms μs V VDD>1V IOL=100μA - - 0.3 VDD>2.5V IOL=1.5mA - - 0.3 VDD>5V IOL=3mA - - 0.35 VDD>1V IOH=-30μA 0.8 - - VDD>2.5V IOH=-1.5mA 2 - - VDD>5V IOH=-3mA 4 - - - - 0.5 μA 0.3•VDD V Only for EM6325_Y (open-drain) V MANUAL RESET ( MR ) MR Input low VMRT low MR Input high VMRT high MR to Reset delay tMD Pulse width at MR (note 5) tPMD MR Internal Pull-up resistor RMR TA= +25°C 0.7•VDD V μs 0.3 μs 1 TA=-40°C to +125°C 4.8 15 31 kΩ Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested. Note 2: RESET (RESET) open. Note 4: Standard version for tPOR is 200ms (typ), available at all times. Other option (1.6ms, 25ms, 1600ms) are available by mask option and upon minimum order quantity. Please contact EM sales. Note 5: Pulse width must be greater than 1μs to ensure the RESET (RESET) to go active. Copyright © 2005, EM Microelectronic-Marin SA 4 www.emmicroelectronic.com EM6325 Timing Waveforms tSEN VDD VHYS VTH Overdrive 0.8V t logic "1" tPMD MR logic "0" t logic "1" tPOR RESET tP tMD logic "0" t logic "1" tPOR RESET logic "0" t Note 6: tSEN = Maximum Transient Duration. Please refer to figure on the next page. Note 7: Overdrive = VTH -VDD. Please refer to figure on the next page. Manual Reset Input A logic low on MR asserts a reset. Reset remains asserted while MR is low, and for tPOR (200ms nominal for EM6325C) after it returns high. MR has an internal 15kΩ pull-up resistor, so it can be left open if unused. This input can be driven with CMOS logic levels or with open-drain outputs. Connect a normally open momentary switch from MR to VSS to create a manual-reset function; debounce circuitry is integrated. If MR is driven from long cable or the device is used in a noisy environment, connect a 0.1μF capacitor from MR to VSS to provide additional noise immunity (stronger external additional pull-up resistor can also be added). Copyright © 2005, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com EM6325 Typical Operating Characteristics (Typical values are at TA=+25°C unless otherwise noted, MR , RESET and RESET open.) 7 300 VDD 3 . 3 V 6 250 5 [ uA ] 200 VDD 5 . 0 V [ us ] 4 150 3 VDD 1. 5 V 2 100 50 1 0 -50 -25 0 25 50 75 0 -50 -25 100 125 0 25 [ °C ] 50 75 100 125 [ °C ] IDD vs. Temperature Propagation Time tP vs. Temperature 200% 400 175% tPOR (°C) 350 150% tPOR (25°C) 300 125% [ us ] 100% 250 Reset occurs above this line 200 75% 150 50% 100 25% 50 0 0% -50 -25 0 25 50 75 1 100 125 10 100 1000 [ mV ] [ °C ] Reset Timeout Period tPOR vs. Temperature (normalized with respect to tPOR 25°C) Maximum Transient Duration tSEN vs. Overdrive VTH-VDD 8% 6% 4% 2% 0% -2% -4% -6% -8% -50 -25 0 25 50 75 100 125 [°C] Threshold Voltage Variation vs. Temperature (normalized) Copyright © 2005, EM Microelectronic-Marin SA 6 www.emmicroelectronic.com EM6325 Package Information D E1 SOT23-5L C A1 A2 A b L E e SYM BOL A A1 A2 b C D E E1 e e1 L e1 M IN 0.90 0.05 0.90 0.35 0.08 2.80 2.60 1.50 TYP M AX 1.30 1.45 0.08 0.15 1.15 1.30 0.50 0.20 2.90 3.00 2.80 3.00 1.75 0.95 1.90 0.45 Dimensions are in mm SC70-5L D L HE E PIN 1 e A2 e b Q1 A A1 Copyright © 2005, EM Microelectronic-Marin SA c SYMBOL e D b E HE Q1 A2 A1 A c L MIN MAX 0.65 BSC 1.80 2.20 0.15 0.30 1.15 1.35 1.80 2.40 0.10 0.40 0.80 1.00 0.00 0.10 0.80 1.10 0.10 0.18 0.10 0.30 NOTE: y All dimensions are in millimeters y Dimensions are inclusive of plating y Dimensions are exclusive of mold flash & metal burr y All specifications comply to EIAJ SC70 7 www.emmicroelectronic.com EM6325 SC70-4L D e e L HE E PIN 1 e1 b Q1 b1 A2 A A1 SYMBOL e e1 D b b1 E HE Q1 A2 A1 A c L MIN MAX 0.65 BSC 0.5 BSC 1.80 2.20 0.15 0.30 0.575 0.70 1.15 1.35 1.80 2.40 0.10 0.40 0.80 1.00 0.00 0.10 0.80 1.10 0.10 0.18 0.10 0.30 c NOTE: y All dimensions are in millimeters y Dimensions are inclusive of plating y Dimensions are exclusive of mold flash & metal burr y All specifications comply to EIAJ SC70 y Even though the width of pin 2 on SC70-4L is slightly larger than on socalled 4-pin SC-82AB, the footprint of SC70-4L package is compatible with the footprint of SC-82AB package from other suppliers, and thus suitable for pin-to-pin replacement. Please check footprint on PCB. Traceability for small packages Due to the limited space on the package surface, the bottom marking contains a limited number of characters that provide only partial information for lot traceability. Full information for complete traceability is however provided on the packing labels of the product at delivery from EM. It is highly recommended that the customer insures full lot traceability of EM product in his final product. EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site. EM assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for use as components in life support devices or systems. Product qualification is performed according to internal EM quality standards for industrial products. For any special requirement (eg. automotive grade) please contact EM Microelectronic-Marin S.A. © EM Microelectronic-Marin SA, 05/05, Rev. I Copyright © 2005, EM Microelectronic-Marin SA 8 www.emmicroelectronic.com