R
EM MICROELECTRONIC - MARIN SA
V6309
V6319
3-Pin Microprocessor Reset Circuit
Description
Features
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.
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
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.
Applications
Computer
Controllers
Intelligent instruments
Critical P and C power monitoring
Portable/battery-powered equipment
Pin Assignment
Typical Operating Configuration
VDD
SOT23-3L
VDD
VDD
V6309
RES
VSS
VDD
Microprocessor
RES
V6309/19
1
VSS
RES / RES
VSS
Fig. 1
Fig. 2
Pin Description
Pin
1
2
Name
VSS
for V6309
RESET
Copyright 2005, EM Microelectronic-Marin SA
for V6319
RESET
VDD
Function
Ground
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
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V6309
V6319
Absolute Maximum Ratings
Parameter
Terminal voltage to VSS
Min. voltage at RESET or
Symbol
Conditions
VDD
-0.3V to + 6.0V
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
Vmin
-0.3V
Vmax
VCC + 0.3V
Imin
20 mA
Imax
20 mA
tR
100Vs
Pmax
320 mW
TA
TST
-40 to +125C
-65C to +150C
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.
Table 2
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
Symbol
VDD
ICC
VDD < 5.5V
VDD < 3.6V
VTH
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
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
Test Conditions
TA = 0 to +70C
TA = -40 to +105C
TA = -40 to +125C
VDD = VTH to (VTH 100mV)
TA = -40 to 125C
VOL
VDD > 1.0V, ISINK = 50A
VDD = VTH min., ISINK = 1.2mA
VDD = VTH min., ISINK = 3.2mA
VOH
VDD = VTH max., ISOURCE = 500A
VDD = VTH max., ISOURCE = 800A
VOL
VDD = VTH max., ISINK = 1.2mA
VDD = VTH max., ISINK = 3.2mA
1.8V < VDD < VTH min.,
ISOURCE = 150A
VOH
Min.
1.0
1.2
1.6
4.56
4.40
4.31
4.16
3.04
2.92
2.89
2.78
2.59
2.50
140
Typ.
Max.
5.5
5.5
5.5
Unit
V
V
V
26
16
60
50
A
A
4.63
4.70
4.79
4.45
4.53
3.11
3.17
2.96
3.02
2.66
2.72
590
V
V
V
V
V
V
V
V
V
V
ppm/C
s
ms
0.3
0.3
0.4
V
V
V
4.38
3.08
2.93
2.63
-200
7
330
0.8 VDD
VDD-1.5V
V
V
0.3
0.4
0.8 VDD
V
V
V
Table 3
1)
RESET output for V6309 , RESET output for V6319
Copyright 2005, EM Microelectronic-Marin SA
www.emmicroelectronic.com
V6309
V6319
Supply Current vs Temperature
No load, V63xxR/S/T
Power-Down Reset Delay vs Temperature
V63xxR/S/T
Fig. 6
Fig. 3
Power-Down Reset Delay vs Temperature
V63xxL/M
Supply Current vs Temperature
No load, V63xxL/M
Fig. 7
Fig. 4
Normalized Reset Threshold vs Temperature
All versions
Power-Up Reset Timeout vs Temperature
All versions
Fig. 8
Fig. 5
Copyright 2005, EM Microelectronic-Marin SA
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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.
VDD
RES
V6309
100 k
VSS
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.
Max. Transient Duration without causing a Reset Pulse
versus Reset Comparator Overdrive
Interfacing to Ps with Bidirectional Reset I/O
Buffer RES to
other system
components
Buffer
VDD
VDD
RES
RES
V6309
Fig .9
VSS
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.
Copyright 2005, EM Microelectronic-Marin SA
4.7 kO
4.7k
P
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
Packaging and Ordering Information
Dimensions of SOT23-3L Package
SOT23-3L
A1 A2 A
H
e
SYMBOL
A
A1
A2
B
C
D
E
e
e1
H
L
e1
MIN
0.89
0.013
0.95
0.37
0.085
2.80
1.20
1.78
2.10
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
V6309SSP3B
V6309TSP3B
V6309MSP3B
V6309LSP3B
V6319RSP3B
V6319SSP3B
V6319TSP3B
V6319MSP3B
V6319LSP3B
1)
2)
Threshold
Voltage
2.63V
2.93V
3.08V
4.38V
4.63V
2.63V
2.93V
3.08V
4.38V
4.63V
Output Type
Package &
Delivery Form
Active low
push-pull
SOT23-3L,
Tape & Reel
3000 pces
Active high
push-pull
SOT23-3L,
Tape & Reel
3000 pces
Top Marking 1)
with 4 Characters
AEAR
AEAS
AEAT
AEAM
AEAL
AFAR
AFAS
AFAT
AFAM
AFAL
Top Marking 2)
with 3 Characters
ER#
ES#
ET#
EM#
EL#
FR#
FS#
FT#
FM#
FL#
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".
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)
RoHS Compliance Information
This product is also available in a lead-free/green mold package. Please add a "+" symbol at the end of the Part Number when
ordering to receive a lead-free equivalent (eg. V6309LSP3B+). Top marking of lead-free/green mold V6309 parts always begins
with letter "B" instead of "A".
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.
EM Microelectronic-Marin SA, 02/05, Rev. F
Copyright 2005, EM Microelectronic-Marin SA
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