EM6354

EM MICROELECTRONIC-MARIN SA Reset Circuit with Adjustable Delay Description The EM6354 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. 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 going fully active. This delay time, or reset timeout period, can be adjusted using an external capacitor. The output is guaranteed to be in the correct state for VDD down to 0.8V. There are 11 reset threshold voltages starting as low as 1.31V and up to 4.63V. The EM6354 features three output types: active-low push-pull, active-low opendrain and active-high push-pull. Small SC70 and SOT23 packages as well as ultra-low supply current of 2.9µA make the EM6354 an ideal choice for portable and battery-operated devices. EM6354 Features ! ! ! ! ! ! Adjustable reset timeout period using an external capacitor Ultra-low supply current of 2.9µA (VDD=3.3V) Operating temperature range: -40°C to +125°C ±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 Active-high RESET push-pull Immune to short negative VDD transients Guaranteed Reset valid down to 0.8V Threshold hysteresis: 2.1% of VTH Very small SOT23-5L and SC70-4L (SC-82AB) packages ! ! ! ! Typical Application VDD VDD RESET Applications ! * VDD RESET ! ! ! ! ! ! ! EM6354 CD GND MPU, DSP GND GND * REXT for open-drain version only Home appliances Modems Routers, hubs and gateways WAN, LAN Handheld GPS Metering and Instrumentation TV sets Automotive systems Block Diagram VDD Voltage Reference 1 2 4 3 GND Pin Configuration (top view) RESET (RESET) V DD GND 1 2 3 4 NC 5 CD RESET (RESET) V DD + Delay Circuit RESET (RESET) CD SOT23-5L S C70-4L (SC-82AB) GND CD Pin Description SOT23-5L 1 2 3 4 5 Pin SC70-4L 1 Name RESET RESET Function Active-low RESET output. RESET remains low for the reset timeout period after all reset conditions are deasserted and then goes high. Active-high RESET output. RESET remains high for the reset timeout period after all reset conditions are deasserted and then goes low. Supply Voltage (5.5V max.) Ground Not connected. Not internally connected Connect a capacitor between CD and GND to set the timeout period (CD min=1nF; C D max=10000nF). Reset Timeout Period in [ms] is equal to CD in [nF] 2 4 3 VDD GND N.C. CD Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 1 www.emmicroelectronic.com EM6354 Ordering Information EM6354 X SP5B - 2.9 + Reset Output Type: X = Active-low /RES push-pull Y = Active-low /RES open-drain Z = Active-high RES push-pull RoHS Compliance: + = lead-free/green mold compliant [blank] = leaded 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 Package: SP5B = SOT23-5, Tape&Reel 3000 pcs SC4B = SC70-4, Tape&Reel 3000 pcs Note: subject to availability (see standard versions list below). Please give complete Part Number when ordering. Standard Versions (Top Marking) Part Number Top Marking Top 1) Marking with 4 Characters 2) Part Number Top Marking Top 1) Marking with 4 Characters 2) EM6354XSP5B-1.3 EM6354XSP5B-1.8 EM6354XSP5B-1.8+ EM6354XSP5B-2.6 EM6354XSP5B-2.9 EM6354XSP5B-2.9+ EM6354XSP5B-4.6 EM6354XSC4B-1.3 EM6354XSC4B-1.8 EM6354XSC4B-2.6 EM6354XSC4B-2.6+ EM6354XSC4B-2.9 EM6354XSC4B-4.6 EM6354XSC4B-4.6+ EM6354YSP5B-2.6 EM6354YSP5B-4.4 1) 2) KC## KA## K4## KB## AMAA AMAE BMAE AMAG AMAH BMAH AMAL AMAA AMAE AMAG BMAG AMAH AMAL BMAL AMAT AMAW EM6354YSP5B-4.6 EM6354YSP5B-4.6+ EM6354XSP5B-1.3 EM6354XSP5B-1.8 EM6354XSP5B-2.6 EM6354XSP5B-2.9 K1## AMAX BMAX AMAA AMAE AMAG AMAH Top marking is the standard from 2006. No bottom marking exists. Where ## refers to the lot number (EM internal reference only) Top marking with 4 characters is standard from 2003. For lead-free/green mold (RoHS) parts, the first letter of top marking with 4 characters begins with letter “B” instead of letter “A”. Bottom marking indicates the lot number. Standard Versions (samples) Part Number EM6354XSC4B-2.6+ EM6354XSC4B-4.6 Part Number EM6354XSP5B-2.9+ EM6354YSP5B-4.6+ Sample stock is generally held on standard versions 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. Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 2 www.emmicroelectronic.com EM6354 Absolute Maximum Ratings Parameter Symbol Conditions Voltage at VDD to GND VDD -0.3V to +6V Minimum voltage at any signal GND - 0.3V VMIN pin Maximum voltage at any signal VMAX VDD + 0.3V pin Electrostatic discharge max. to MIL-STD-883C method 3015.7 2000V VESD with ref. to VSS Max. soldering conditions TMAX 250°C x 10s Storage Temperature Range TSTG -65°C to +150°C 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. Handling Procedures 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 Parameter Supply voltage (note 1) Operating Temperature Symbol Min Max Unit VDD 0.8 5.5 V TA -40 +125 °C Electrical Characteristics Unless otherwise specified: VDD= 0.8V to 5.5V, TA=+25°C (note 1). Parameter Symbol Conditions +25°C VDD=1.5V -40°C to +125°C Supply current (note 2) IDD VDD=3.3V VDD=5.0V +25°C -40°C to +125°C +25°C -40°C to +125°C Min 1.290 1.359 1.546 1.635 1.773 2.167 2.591 2.886 3.034 4.334 4.561 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 Max 4.6 7 5.5 8.3 6.3 9.6 1.330 1.401 1.594 1.685 1.827 2.233 2.669 2.974 3.126 4.466 Unit µA EM6354 – 1.3 EM6354 – 1.4 EM6354 – 1.6 EM6354 – 1.7 Threshold voltage (note 3) EM6354 – 1.8 VTH EM6354 – 2.2 EM6354 – 2.6 EM6354 – 2.9 EM6354 – 3.1 EM6354 – 4.4 EM6354 – 4.6 V 4.699 Threshold voltage ∆VTH temperature coefficient ppm/°C TA = -40°C to +125°C ±50 ∆TA (note 4) Threshold hysteresis VHYS 2.1%•VTH V Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested. VDD min=0.9V for active-high versions (EM6354Z). Note 2: RESET (RESET) open. Note 3: Threshold voltage is specified for VDD falling. Note 4: Typical variation ∆VTH of VTH at a given temperature TA is calculated as follows: ∆VTH (T = TA ) = ∆VTH × VTH × TA − 25°C ∆TA Example: -6 for version VTH=2.93V, variation at TA=70°C is equal to ∆VTH(70°C)=±50•10 x 2.93 x (70-25)=±6.59mV Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 3 www.emmicroelectronic.com EM6354 Electrical Characteristics Parameter Reset timeout period Propagation delay time VDD to RESET (RESET) delay Open-drain RESET output Voltage (continued) Unless otherwise specified: VDD= 0.8V to 5.5V, TA=+25° C (note 1). Symbol tPOR tP VOL Conditions CD=100nF (measured value, note 5) VDD from 0V to VTH (typ)+15% (note 2) EM6354-4.6 version VDD drops from VTH (typ)+0.2V to VTH (typ)-0.2V (note 2) VDD>1V -40°C to +125°C VDD>2.5V VDD>5V VDD>1V IOL=100µA IOL=1.5mA IOL=3mA IOL=100µA IOL=1.5mA IOL=3mA IOH=-30µA IOH=-1.5mA IOH=-3mA Min 72 2 0.8 2 4 Typ 100 130 - Max 122 255 0.3 0.3 0.3 0.3 0.3 0.3 - Unit ms µs V VOL Push-pull RESET / RESET Output voltage VOH -40°C to +125°C VDD>2.5V VDD>5V VDD>1V V -40°C to +125°C VDD>2.5V VDD>5V Output leakage current ILEAK -40°C to +125°C, only for EM6354Y (open-drain) 0.5 µA Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested. VDD min=0.9V for active-high version (EM6354Z). Note 2: RESET (RESET) open. Note 5: tPOR is programmable by varying the value of the external capacitor connected to pin CD. The relation is tPOR (ms) = CD (nF). The tolerance of the capacitor should be taken into account. Timing Waveforms tSEN VDD VTH Overdrive VHYS 0.8V t logic "1" RESET logic "0" t logic "1" tPOR tP RESET 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. Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 4 www.emmicroelectronic.com EM6354 Typical Reset Timeout Period The Reset Timeout Period (tPOR) is programmable using an external capacitor connected to pin CD of EM6354. A ceramic chip capacitor rated at or above 10V is sufficient. The Reset Timeout Period (tPOR) can be calculated using the following formula for VTH =4.63V (EM6354-4.6): tPOR (ms) = CD (nF). For example a CD of 100nF will achieve a tPOR of 100 ms. The tolerance of the capacitor should be taken into account. If no delay due to tPOR is needed in a certain application, the circuit EM6352 should be used instead. For threshold voltage between VTH=4.63V and VTH=1.31V , the following graphic applies : 130 120 [ ms ] 110 100 1.31 2.93 VTH 4.63 Typical Reset Timeout Period tPOR vs. VTH for CD=100nF at TA=+25°C [ms] 10000 VTH = 1.31 V 1000 VTH = 4.63 V 100 10 1 1 10 100 1000 10000 [nF] Reset Timeout Period tPOR vs. Capacitor CD at TA=+25°C Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 5 www.emmicroelectronic.com EM6354 Typical Operating Characteristics (Typical values are at TA=+25°C unless otherwise noted, RESET or RESET open.) 200% 175% 150% 125% 100% 75% 50% 25% 0% -50 -25 0 25 50 75 100 125 [°C] tPOR (°C) tPOR (25°C) 200% 175% 150% 125% 100% 75% 50% 25% 0% -50 -25 0 25 50 75 100 125 tP (°C) tP (25°C) [°C] Reset Timeout Period tPOR vs. Temperature (normalized with respect to tPOR 25°C) Propagation Time tP vs. Temperature (normalized with respect to tP 25°C) 7 6 5 [ uA ] 4 3 2 1 0 -50 VDD 1. 5 V VDD 5 . 0 V VDD 3 . 3 V 400 350 300 [ us ] 250 200 150 100 50 Reset occurs above this line -25 0 25 50 [ °C ] 75 100 125 0 1 10 [ mV ] 100 1000 IDD vs. Temperature 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 © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 6 www.emmicroelectronic.com EM6354 Package Information D A1 A2 A SOT23-5L E1 C L b e SYM BOL A A1 A2 b C D E E1 e e1 L E M IN 0.90 0.05 0.90 0.35 0.08 2.80 2.60 1.50 TYP 1.30 0.08 1.15 2.90 2.80 0.95 1.90 0.45 M AX 1.45 0.15 1.30 0.50 0.20 3.00 3.00 1.75 e1 Dimensions are in mm D e e SC70-4L L HE E PIN 1 e1 b b1 Q1 A2 A A1 c NOTE: " All dimensions are in millimeters " Dimensions are inclusive of plating " Dimensions are exclusive of mold flash & metal burr " All specifications comply to EIAJ SC70 " 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. 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 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. Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.I 7 www.emmicroelectronic.com