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EM MICROELECTRONIC - MARIN SA
V6309 V6319
3-Pin Microprocessor Reset Circuit
Description
The V6309 and V6319 are microprocessor supervisory circuits used to monitor the power supplies in P and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V powered or 3V powered circuits. These circuits perform a single function: they assert a reset signal whenever the VDD supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VDD has risen above the reset threshold. The only difference between the two devices is that the V6309 has an active-low RESET output (which is guaranteed to be in the correct state for VDD down to 1V), while the V6319 has an activehigh RESET output. The reset comparator is designed to ignore fast transients on VDD. Reset thresholds suitable for operation with a variety of supply voltages are available. Low supply current makes the V6309/V6319 ideal for use in portable equipment. The V6309/V6319 come in a 3-pin SOT23 package.
Features
! Precision monitoring of 3V, 3.3V and 5V power supply voltages ! Fully specified over the temperature range of -40 to +125C ! 140ms minimum power-on reset pulse width: RESET output for V6309 RESET output for V6319 ! 16 A supply current ! Guaranteed RESET/RESET valid to VDD = 1V ! Power supply transient immunity ! No external components needed ! 3-pin SOT23 package ! Fully compatible with MAX809/MAX810
Applications
! ! ! ! ! Computer Controllers Intelligent instruments Critical P and C power monitoring Portable/battery-powered equipment
Typical Operating Configuration
VDD VDD V6309 RES VDD Microprocessor RES
Pin Assignment
SOT23-3L
VDD
3
V6309/19
1 2
VSS
VSS
VSS
RES / RES
Fig. 1
Fig. 2
Pin Description
Pin 1 2 Name VSS for V6309 Function Ground
RESET
2 for V6319 RESET VDD
3
RESET Output remains low while VDD is below the reset threshold and rises for 240ms after VDD above the reset threshold RESET Output remains high while VDD is below the reset threshold and rises for 240ms after VDD above the reset threshold Supply voltage (+5V, +3.3V or +3.0V) Table 1
Copyright (c) 2006, EM Microelectronic-Marin SA 03/06 - rev.G
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V6309 V6319
Symbol Conditions VDD -0.3V to + 6.0V
Vmin Vmax Imin Imax tR Pmax TA TST -0.3V VCC + 0.3V 20 mA 20 mA 100Vs 320 mW -40 to +125C -65C to +150C
Table 2
Absolute Maximum Ratings
Parameter Terminal voltage to VSS Min. voltage at RESET or
RESET Maximum voltage at RESET or RESET Input current at VDD Output current at RESET or RESET Rate of rise at VDD Continuous power dissipation at TA = +70C for SOT-23 (>70C derate by 4 mW/C) Operating temperature range Storage temperature range 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, it is advised that normal precautions 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.
Electrical Characteristics
VDD = full range, TA = -40 to +125C, unless otherwise specified, typical values at TA = +25C, VDD = 5V for versions L and M, VDD = 3.3V for versions T and S, VDD = 3 V for R. (Production testing done at TA = +25C and 85C, over temperature limits guaranteed by design only)
Parameter
VDD range Supply current versions L, M versions R, S, T 1) RESET threshold version L version M version T version S version R Reset threshold temp. coefficient 1) VDD to reset delay Reset active timeout period RESET output voltage low for V6309 versions R, S, T versions L, M RESET output voltage high for V6309 versions R, S, T versions L, M RESET output voltage low for V6319 versions R, S, T versions L, M RESET output voltage high for V6319
Symbol VDD
Test Conditions TA = 0 to +70C TA = -40 to +105C TA = -40 to +125C
VDD < 5.5V VDD < 3.6V TA = +25C TA = -40 to +125C TA = +25C TA = -40 to +125C TA = +25C TA = -40 to +125C TA = +25C TA = -40 to +125C TA = +25C TA = -40 to +125C VDD = VTH to (VTH - 100mV) TA = -40 to 125C
Min. 1.0 1.2 1.6
Typ.
Max. 5.5 5.5 5.5
60 50 4.70 4.79 4.45 4.53 3.11 3.17 2.96 3.02 2.66 2.72
Unit V V V
A A V V V V V V V V V V ppm/C s ms V V V V V
ICC VTH
26 16 4.56 4.40 4.31 4.16 3.04 2.92 2.89 2.78 2.59 2.50 4.63 4.38 3.08 2.93 2.63 -200 7 330
140
590 0.3 0.3 0.4
VOL
VDD > 1.0V, ISINK = 50A VDD = VTH min., ISINK = 1.2mA VDD = VTH min., ISINK = 3.2mA VDD = VTH max., ISOURCE = 500A VDD = VTH max., ISOURCE = 800A VDD = VTH max., ISINK = 1.2mA VDD = VTH max., ISINK = 3.2mA 1.8V < VDD < VTH min., ISOURCE = 150A 0.8 VDD VDD-1.5V
VOH VOL VOH
0.3 0.4 0.8 VDD
V V V
Table 3
1)
RESET output for V6309 , RESET output for V6319
Copyright (c) 2006, EM Microelectronic-Marin SA 03/06 - rev.G
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V6309 V6319
Power-Down Reset Delay vs Temperature V63xxR/S/T
Supply Current vs Temperature No load, V63xxR/S/T
Fig. 3
Fig. 6
Supply Current vs Temperature No load, V63xxL/M
Power-Down Reset Delay vs Temperature V63xxL/M
Fig. 4
Fig. 7
Power-Up Reset Timeout vs Temperature All versions
Normalized Reset Threshold vs Temperature All versions
Fig. 5
Fig. 8
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V6309 V6319
RESET Valid for VDD = Ground Circuit
Application Information
Negative-Going VDD Transients In addition to issuing a reset to the microprocessor during power-up, power-down and brownout conditions, the V6309/V6319 are relatively immune to short duration negative-doing VDD transients (glitches). Fig. 8 shows typical transient duration vs. Reset comparator overdrive, for which the V6309/V6319 do not generate a reset pulse. The graph was generated using a negative-going pulse applied to VDD, starting 0.5V above the actual reset threshold and ending below it by the magnitude indicated (reset comparator overdrive). The graph indicates the maximum pulse width a negative-going VDD transient can have without causing a reset pulse. As the magnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, for the V6309L and V6319M, a VDD transient that goes 100V below the reset threshold and lasts 20s or less will not cause a reset pulse. A 0.1F bypass capacitor mounted as close as possible to the VDD pin provides additional transient immunity. Max. Transient Duration without causing a Reset Pulse versus Reset Comparator Overdrive
VDD
RES V6309 VSS 100 k
Fig. 10
Interfacing to Ps with Bidirectional Reset Pins Microprocessors with bidirectional reset pins (such as the Motorola 68HC11 series) can connect to the V6309 reset output. If, for example, the V6309 RESET output is asserted high and the P wants to pull it low, indeterminate logic levels may result. To correct this, connect a 4.7 k resistor between the V6309 RESET and the P reset I/O (Fig. 11). Buffer the V6309 RESET output to other system components. Interfacing to Ps with Bidirectional Reset I/O
Buffer Buffer RES to other system components
VDD
VDD
RES V6309 4.7 kO 4.7k
RES P VSS
Fig .9
Ensuring a Valid Reset Output down to VDD = 0V When VDD falls below 1V, the V6309 RESET output no longer sinks current, it becomes an open circuit. Therefore, high-impedance CMOS logic inputs connected to RESET can drift to undetermined voltages. This presents no problem in most applications, since most P and other circuitry is inoperative with VDD below 1V. However, in applications where RESET must be valid down to 0V, adding a pull-down resistor to RESET causes any stray leakage currents to flow to ground, holding RESET low (Fig. 10). R1's value is not critical; 100 k is large enough not to load RESET and small enough to pull RESET to ground. A 100 k pull-up resistor to VDD is also recommended for the V6319, if RESET is required to remain valid for VDD < 1V.
VSS
Fig. 11
Benefits of Highly Accurate Reset Threshold Most P supervisor ICs have reset threshold voltages between 5% and 10% below the value of nominal supply voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10% below nominal. When using ICs rated at only the nominal supply 5%, this leaves a zone of uncertainty where the supply is between 5% and 10% low, and where the reset may or may not be asserted. The V6209/T and V6319/T use highly accurate circuitry to ensure that reset is asserted close to the 5% limit, and long before the supply has declined to 10% below nominal.
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V6309 V6319
D
A1 A2 A SOT23-3L
Packaging and Ordering Information
Dimensions of SOT23-3L Package
E
C L
B
H e
SYMBOL A A1 A2 B C D E e e1 H L MIN 0.89 0.013 0.95 0.37 0.085 2.80 1.20 1.78 2.10
e1
TYP MAX 1.04 1.12 0.10 0.97 1.00 0.51 0.12 0.18 2.95 3.04 1.32 1.40 0.95 1.90 2.05 2.40 2.64 0.55
Dimensions are in mm
Ordering Information When ordering, please always specify the complete Part Number. Please contact EM Microelectronic for availability. Part Number
V6309RSP3B V6309RSP3B+ V6309SSP3B V6309SSP3B+ V6309TSP3B V6309TSP3B+ V6309MSP3B V6309MSP3B+ V6309LSP3B V6309LSP3B+ V6319RSP3B V6319SSP3B V6319TSP3B V6319MSP3B V6319MSP3B+ V6319LSP3B
1) 2) 3)
Threshold Voltage
2.63V 2.63V 2.93V 2.93V 3.08V 3.08V 4.38V 4.38V 4.63V 4.63V 2.63V 2.93V 3.08V 4.38V 4.38V 4.63V
Output Type
Package & Delivery Form
Top Marking 1)
Active low push-pull
SOT23-3L, Tape & Reel 3000 pces
EK## AT## BT## EF## E9## E6##
Active high push-pull
SOT23-3L, Tape & Reel 3000 pces
P0## E5##
Top Marking 2) with 4 Characters AEAR BEAR AEAS BEAS AEAT BEAT AEAM BEAM AEAL BEAL AFAR AFAS AFAT AFAM BFAM AFAL
Top Marking 3) with 3 Characters ER#
ES# ET# EM# EL# FR# FS# FT# FM# FL#
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. Top marking with 3 characters is kept as information since it was used until 2002. Where # refers to the lot number (EM internal reference only)
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.
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V6309 V6319
Part Number
V6319TSP3B V6319MSP3B+
Samples
Part Number
V6309LSP3B+ V6309MSP3B+ V6309RSP3B+ V6309SSP3B+ V6309TSP3B+
Sample stock is generally held on versions list above. Please contact factory for other versions not shown here.
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.
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