UM805SE

UM805 UNIONSEMI | Alldatasheet

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Technical content

Features

 Computers  Controllers  Portable/Battery-Powered Equipments  Intelligent Instruments  Critical μP and μC Power Monitoring  No External Components  VCC Transient Immunity  Correct Logic Output Guaranteed to VCC=1.0V  Precision VCC Monitoring of 3.0V, 3.3V and 5.0V Supplies  2μA Supply Current  140ms Minimum Power-On Reset Pulse Width  Guaranteed Over Temperature  Available in 3 Output Configurations: Open-Drain Active-Low RESET Output(UM805) Push-Pull Active-Low RESET Output(UM811) Push-Pull Active-High RESET Output(UM812)  4-Pin SOT143 Package  Wide Operation Temperature: -40°C to +85°C

http://www.union-ic.com Rev.01 Jan.2015 2/14 UM805/811/812 Pin Configurations Top View

Ordering Information

XX: Output Type =05 Open-Drain Active Low =11 Push-Pull Active Low =12 Push-Pull Active High Z: Reset Threshold (V) =L 4.63 =M 4.38 =J 4.00 =T 3.08 =S 2.93 =R 2.63 =Z 2.32 P: Package Type =E SOT143 Typical Operating Circuit VCC UM805 UM811 UM812 GND RESET (RESET) VCC GND RESET INPUT VCC MR PUSHBUTTON SWITCH μP Rpullup* *UM805 ONLY ( ) are for UM812 2 3 4GND RESET (RESET) MR VCC ( ) are for UM812 1 2 MXXX M: Month Code UM805/811/812 SOT143

http://www.union-ic.com Rev.01 Jan.2015 3/14 UM805/811/812 Pin Description Pin Number Pin Name Function

1 GND Ground

(UM805/811) Active-Low Reset Output. RESET remains low while V CC is below the reset threshold or while MR is held low. It remains low for the Reset Active Timeout Period (t RP) after the reset conditions are terminated. See Figure 1. UM811: CMOS push-pull output (sources and sinks current) UM805: Open-drain, active low, NMOS output (sinks current only). Connect a pull-up resistor from RESET to any supply voltage up to 6V. RESET (UM812) Active-High Reset Output. RESET remains high while V CC is below the reset threshold or while MR is held low. RESET remains high for Reset Active Timeout Period (t RP) after the reset conditions are terminated. 3 MR Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR is low and for 240ms after MR returns high. This active-low input has an internal 20kΩ pull-up resistor. It can be driven from a TTL or CMOS -logic line, or shorted to ground with a switch. Leave open if unused. See Figure 2. 4 VCC +5V, +3.3V, or +3V Supply Voltage Absolute Maximum Ratings (Note 1) Symbol Parameter Value Unit VCC Supply Voltage -0.3 to +6.0 V RESET, RESET (push-pull) -0.3 to (VCC+0.3) RESET (open-drain) -0.3 to +6.0 ICC Input Current, VCC, MR 20 mA IO Output Current, RESET, RESET 20 mA PD Continuous Power Dissipation (Derate 4mW/° C above 70° C) 320 mW TA Operating Temperature Range -40 to +105 °C TSTG Storage Temperature Range -65 to +160 °C Lead Temperature (soldering, 10s) +300 °C Note 1: Stresses bey ond those listed under “Absolute maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the spec ifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

http://www.union-ic.com Rev.01 Jan.2015 4/14 UM805/811/812

Electrical Characteristics

(VCC = 5V for L/M/J versions, V CC = 3.3V for T/S versions, V CC = 3V for R version, and VCC = 2.5V for Z version, TA = -40° C to +85° C, unless otherwise noted. Typical values are at TA = +25° C.) (Note 2) Symbol Parameter Conditions Min Typ Max Unit VCC Supply Voltage Range TA=0°C to +70°C 1.0 5.5 V ICC Supply Current 2.0 5.0 μA VTH+ Reset Threshold L version TA=+25℃ 4.56 4.63 4.70 V M version TA=+25℃ 4.31 4.38 4.45 J version TA=+25℃ 3.93 4.00 4.06 T version TA=+25℃ 3.04 3.08 3.11 S version TA=+25℃ 2.89 2.93 2.96 R version TA=+25℃ 2.59 2.63 2.66 Z version TA=+25℃ 2.28 2.32 2.35 Reset Threshold Tempco 150 ppm/°C VCC to Reset Delay (Note 3) 10 μs tRP Reset Active Timeout Period 140 240 560 ms tMR MR Minimum Pulse Width 10 μs MR Glitch Immunity (Note 4) 100 ns tMD MR to Reset Propagation Delay 0.5 μs VIH MR Input Threshold VCC > VTH(MAX) UM805/811/812LE/ME/JE 2.3 V VIL 0.8 VIH VCC > VTH(MAX) UM805/811/812TE/SE/RE/ZE 0.7× VCC VIL 0.25× VCC MR Pull-Up Resistance 10 20 30 kΩ

http://www.union-ic.com Rev.01 Jan.2015 5/14 UM805/811/812 Electrical Characteristics (Continued) (VCC = 5V for L/M/J versions, V CC = 3.3V for T/S versions, V CC = 3V for R version, and VCC = 2.5V for Z version, TA = -40° C to +85° C, unless otherwise noted. Typical values are at TA = +25° C.) (Note 2) Symbol Parameter Conditions Min Typ Max Unit VOH RESET Output Voltage ISOURCE=150μA, 1.8V<VCC<VTH(MIN) UM812LE/ME/JE/TE/SE/RE/ZE 0.8× VCC V VOL ISINK=1.2mA UM812TE/SE/RE/ZE 0.3 ISINK=3.2mA UM812LE/ME/JE 0.4 VOH RESET Output Voltage ISOURCE=500μA, VCC>VTH(MAX) UM811TE/SE/RE/ZE 0.8× VCC V ISOURCE=800μA, VCC>VTH(MAX) UM811LE/ME/JE VCC-1.5 VOL ISINK=1.2mA, VCC=VTH(MIN) UM805/811TE/SE/RE/ZE 0.3 ISINK=3.2mA, VCC=VTH(MIN) UM805/811LE/ME/JE 0.4 ISINK=50μA, VCC>1.0V 0.3 Note 2: Production testing done at TA = +25° C; limits over temperature guaranteed by design only. Note 3: RESET output for UM805/811; RESET output for UM812. Note 4: “Glitches” of 100ns or less typically will not generate a reset pulse.

http://www.union-ic.com Rev.01 Jan.2015 6/14 UM805/811/812 Typical Operating Characteristics (TA = +25° C, unless otherwise noted.) VCC=3.3V Supply Current vs. Temperature (UM811RE) Power-down RESET Delay vs. Temperature (UM811RE) Power-up RESET Timeout vs. Temperature

http://www.union-ic.com Rev.01 Jan.2015 8/14 UM805/811/812 high. If a brownout condition occurs (V CC dips below the reset threshold), RESET goes low. Any time VCC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer starts after VCC returns above the reset threshold, and RESET remains low for the reset timeout period. The manual reset input (MR ) can also initiate a reset. See the Manual Reset Input section. The UM812 has an active -high RESET output that is the inverse of the UM805/811’s RESET output. The UM805 uses an open -drain output, and the UM811/812 have a push -pull output stage. Connect a pull-up resistor on the UM805’s RESET output to any supply between 0 and 6V . Manual Reset Input Many μP-based products require manual reset capability, allowing the operator, a test technician, or external logic circuitry to initiate a reset. A logic low on MR asserts reset. Reset remains asserted while MR is low, and for the Reset Active Timeout Period (tRP) after MR returns high. This input has an internal 20kΩ pull-up resistor, so it can be left open if it is not used. MR can be driven with TTL or CMOS -logic levels, or with open -drain/collector outputs. Connect a normal ly open momentary switch from MR to GND to create a manual -reset function; external debounce circuitry is not required. If MR is driven from long cables or if the device is used in a noisy environment, connecting a 0.1μF capacitor from MR to ground provides additional noise immunity. Reset Threshold Accuracy The UM805/811/812 are ideal for systems using a 5V± 5% or 3V± 5% power supply with ICs specified for 5V ± 10% or 3V ± 10%, respectively. They are designed to meet worst -case specifications over temperature. The reset is guaranteed to assert after the power supply falls out of regulation, but before power drops below the minimum specified operating voltage range for the system ICs. The thresholds are pre -trimmed and exhibit tight distribution, reducing the range over which an undesirable reset may occur.

occurs depends on the pull-up resistor value and the voltage to which it is connected. Figure 6. UM805 Open-Drain RESET

http://www.union-ic.com Rev.01 Jan.2015 12/14 UM805/811/812

Package Information

e E D b2 b A C L Top View End View Side View DIMENSIONS Symbol MILLIMETERS INCHES Min Max Min Max A 0.763 1.220 0.031 0.049 A1 0.013 0.150 0.001 0.006 A2 0.750 1.070 0.030 0.043 b 0.300 0.510 0.012 0.020 b2 0.760 0.930 0.030 0.037 C 0.080 0.200 0.003 0.008 D 2.800 3.040 0.112 0.122 E 2.200 2.640 0.088 0.211 E1 1.200 1.400 0.048 0.056 e 1.920BSC 0.077BSC e1 0.200BSC 0.008BSC L1 0.540REF 0.022 L 0.400 0.600 0.016 0.024 Land Pattern 0.90 0.50 1.92 0.80 0.20 NOTES: 1. Compound dimension: 2.90× 1.30; 2. Unit: mm; 3. General tolerance ± 0.05mm unless otherwise specified; 4. The layout is just for reference. Tape and Reel Orientation XXX M

http://www.union-ic.com Rev.01 Jan.2015 13/14 UM805/811/812 Selection Table Part Number RESET Threshold (V) Timeout Period (ms) Output Type Marking Code Package Type Shipping Qty UM805LE 4.63 240 Open-Drain, Active Low 05L SOT143 3000pcs/7Inch Tape & Reel UM805ME 4.38 240 Open-Drain, Active Low 05M UM805JE 4.00 240 Open-Drain, Active Low 05J UM805TE 3.08 240 Open-Drain, Active Low 05T UM805SE 2.93 240 Open-Drain, Active Low 05S UM805RE 2.63 240 Open-Drain, Active Low 05R UM805ZE 2.32 240 Open-Drain, Active Low 05Z UM811LE 4.63 240 Push-Pull, Active Low 11L UM811ME 4.38 240 Push-Pull, Active Low 11M UM811JE 4.00 240 Push-Pull, Active Low 11J UM811TE 3.08 240 Push-Pull, Active Low 11T UM811SE 2.93 240 Push-Pull, Active Low 11S UM811RE 2.63 240 Push-Pull, Active Low 11R UM811ZE 2.32 240 Push-Pull, Active Low 11Z UM812LE 4.63 240 Push-Pull, Active High 12L UM812ME 4.38 240 Push-Pull, Active High 12M UM812JE 4.00 240 Push-Pull, Active High 12J UM812TE 3.08 240 Push-Pull, Active High 12T UM812SE 2.93 240 Push-Pull, Active High 12S UM812RE 2.63 240 Push-Pull, Active High 12R UM812ZE 2.32 240 Push-Pull, Active High 12Z

http://www.union-ic.com Rev.01 Jan.2015 14/14 UM805/811/812 IMPORTANT NOTICE The information in this document has been carefully reviewed and is believed to be accurate. Nonetheless, this document is subject to change without notice. Union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. Union reserves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. Union Semiconductor, Inc Add: Unit 606, No.570 Shengxia Road, Shanghai 201210 Tel: 021-51093966 Fax: 021-51026018 Website: www.union-ic.com