STM6700, STM6710
Low-voltage, high-accuracy, triple/quad voltage microprocessor
supervisory circuit in SOT package
Datasheet - production data
• Low power consumption (< 35 µA)
• Reset timeout period 200 ms (typ.) - STM6710
• 5 µs propagation delay - STM6700
• Open drain RESET output with a weak pull-up
(10 µA)
• RESET - active low - valid to V1IN = 1 V or
V2IN = 1 V
• Immune to power supply transients
SOT23-6 (WB)
• Small 6-pin SOT23 package
• RoHS compliant
Applications
Features
• Telecommunications
• Accurate monitoring of up to four supply
voltages
• Set-top boxes
• Precision factory set reset threshold options for
1.8 V, 2.5 V, 3.0 V, 3.3 V and 5.0 V
• Server/workstations
• Adjustable input threshold voltage = 0.62 V
with 1.5% accuracy
• Data storage equipment
• Networking equipment
• Desktop and notebook computers
Table 1. Device summary
Order code
V1IN
(V)
STM6710DWB6F
5
V2IN
(V)
V3IN
(V)
V4IN
(V)
1.8
Adj.
Power supply
tolerance
STM6710FWB6F
Temperature
range
-40 to 85 °C
5%
2.5
1.8
-40 to 105 °C
STM6710FWB7F
SOT23-6
3.3
STM6710KWB6F
Package
Adj.
STM6710LWB6F
10%
1.8
5%
STM6710LWB7F
September 2020
This is information on a product in full production.
-40 to 85 °C
Adj.
DocID16887 Rev 4
-40 to 105 °C
1/20
www.st.com
Contents
STM6700, STM6710
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Pinout and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4
Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1
RESET output configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2
Adjustable thresholds (input configurations) . . . . . . . . . . . . . . . . . . . . . . . 9
4.3
Unused inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4
Adding manual reset capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1
SOT23 - 6-lead small outline transistor package information . . . . . . . . . . 14
8
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9
STM6700 / STM6710 device selector guide . . . . . . . . . . . . . . . . . . . . . . 18
10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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STM6700, STM6710
1
Description
Description
The STM6710 is a precision voltage monitoring supervisor with the capability to monitor
triple/quad voltages and combine competitive reset threshold accuracy with low power
consumption.
Factory-trimmed reset threshold options for monitoring 5.0 V, 3.3 V, 2.5 V and 1.8 V supplies
with –5% and –10% tolerances are available.
If a monitored supply voltage input falls below the minimum voltage threshold, a single
active low output is asserted, triggering a system reset.
This device can be configured to support an external manual reset input using minimal
external components.
Monitoring up to four different voltages in a small 6-lead SOT23 package, the STM6710
devices can help to lower system cost, reduce board space requirements, and increase the
reliability of multi-voltage systems.
Low VCC detection circuitry protects the user's system from low voltage conditions, resetting
the system when VCC or any of the other monitored power supply voltages fall below their
respective minimum voltage thresholds. The reset signal remains asserted until all of these
voltages return to proper operating levels and stabilize.
STM6710 includes internally fixed monitoring voltages for 5.0 V, 3.3 V, 3.0 V, 2.5 V and 1.8
V supplies with –5% and –10% tolerances.
This device functions as a triple monitoring voltage supervisor (STM6700) when V2IN is
used as VCC.
The output is open drain with a weak internal pull-up to the monitored V2IN supply (or VCC
in the case of STM6710Q) of typically 10 µA. Once all voltages rise above the selected
threshold level, the STM6710 reset signal remains low for the reset timeout period of
200 ms (typical). The STM6700 acts as a voltage detector with a propagation delay of 5 µs
after all monitored voltages exceed their thresholds.
The STM6710 output remains valid as long as V1IN or V2IN exceeds 1 V. For the STM6700
and STM6710 the condition is to have VCC above 2 V.
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Functional description
2
STM6700, STM6710
Functional description
Figure 1. Functional block diagram
1. The STM6700 and STM6710Q are powered via the V2IN input which is the supply voltage. When this pin is
VCC, the input is not monitored.
Figure 2. Logic diagram
V2IN / VCC
V1IN
V3IN
STM6700
(1)
RESET
STM6710
V4IN
AM04617v1
1. Open drain
4/20
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STM6700, STM6710
Functional description
Table 2. Signal names
Pin
Name
Type
1
V1IN
Input
V2IN
2
VCC
3
Function (STM6710 / STM6700)
Input voltage 1
Input voltage 2 and device power supply pin
Input/supply For the triple monitor voltage STM6700 and for STM6710Q, this pin
is the VCC supply pin and it is not monitored
V3IN
Input voltage 3
Input
4
V4IN
5
GND
6
RESET
Input voltage 4
Supply
Ground
Output
Active low, open drain RESET output. Output goes low when any
input drops below the specified threshold. Once all inputs rise above
their threshold voltages, RESET remains low for typical 200 ms
(STM6710) before going high.
For the triple monitor (STM6700) it remains low for 5 µs
(propagation delay - no tREC).
The open drain RESET has a weak (10 µA) internal pull-up to V2IN
(STM6710) or VCC (STM6700/STM6710Q).
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Pinout and pin description
3
STM6700, STM6710
Pinout and pin description
Figure 3. Pinout SOT23-6
SOT23-6
V1IN
1
V2IN (VCC) 2
STM6700
STM6710
V3IN 3
(1)
6
RESET
5
GND
4
V4IN
AM04618v1
1. Open drain
2. For the STM6700 and STM6710Q, pin 2 is a fixed VCC, thereby making it a triple voltage reset, while the
STM6710 is a quad voltage reset.
V1IN, V3IN,V4IN (VxIN)
The VxIN pins are used for nominal input voltages for 1.8 V, 2.5 V and 5.0 V supplies. The
voltage at this pin is compared against an internal factory-programmed voltage trip point,
Vrst.
RESET is first asserted low when the device is initially powered and VxIN < 1 V and then at
any time thereafter when VxIN falls below Vrst. The device is designed with typical
hysteresis of 0.3% with respect to its threshold to help prevent oscillation due to noise and is
immune to brief power supply transients.
V2IN
The V2IN is used to power the STM6710 device. In normal operations V2IN is also
monitored. For STM6710Q and STM6700 variations this pin is the VCC power supply but is
not monitored.
Ground (VSS)
This pin (GND) is the ground pin for the power supply and is tied to VSS.
RESET
The RESET output is an open drain output that asserts low whenever a monitored supply
falls below the minimum threshold. STM6710 provides an extended reset timeout period of
typically 200 ms.
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STM6700, STM6710
4
Device operation
Device operation
The STM6710 is capable of monitoring up to 4 voltages in a multisupply application. The
device is available in several preset voltage thresholds for power supplies of 1.8 V, 2.5 V,
3.0 V, 3.3 V and 5.0 V. The STM6710 is powered by the V2IN pin which is also a monitored
voltage, thus making this a quad voltage monitor. The STM6710Q and STM6700 use this
pin as VCC which is not monitored and thereby limits these devices to three adjustable
voltage inputs. If any of the monitored input voltage falls below its associated threshold, the
active low reset output is asserted and remains low as long as V1IN or V2IN remains above
1.0 V.
Figure 4. Hardware hookup (typical application diagram)
STM6710
V1IN
SUPPLIES
TO BE
MONITORED
V2IN (VCC)
V3IN
RESET
µP
V4IN
GND
AM04620v1
4.1
RESET output configuration
The RESET output asserts low if a monitored input voltage drops below its threshold. This is
an open drain with a weak internal pull-up to V2IN or the VCC supply, and is typically 10 µA.
However, many applications may not require an external pull-up resistor. In case a pull-up
resistor is required and is connected to a voltage ranging from 0 to 5.5 V (as shown in
Figure 5), it can overdrive the weak internal pull-up. The STM6710 has built-in circuitry to
prevent this reverse current flow to V2IN under this condition.
Figure 5. Interface to external pull-up using a different supply voltage
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Device operation
STM6700, STM6710
Figure 6. RESET output diagram
VxIN
VTHx
VTHx
RESET
90%
10%
t RD
t RP
AM04622v1
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STM6700, STM6710
4.2
Device operation
Adjustable thresholds (input configurations)
The STM6700/STM6710 may be configured to monitor several options with adjustable reset
thresholds. The threshold voltages at each adjustable input VxIN is typically 0.62 V. Thus to
monitor a voltage > 0.62 V, a resistor divider network as shown in Figure 7 can be used.
The STM6710 allows users to customize the minimum voltage sense level with adjustable
reset thresholds. The threshold voltage at each adjustable input VxIN is typically 0.62 V.
For example, the user can adjust the voltage input threshold (VTHx) for V1IN, V3IN and
V4IN inputs. To do this, connect an external resistor divider network to the VxIN pin in order
to set the trip point to some other voltage above 620 mV according to Equation 1 and
Equation 2 which is also shown in Figure 7.
Equation 1
( R1 + R2 )
VTHx = 0.62V × --------------------------R2
or solved in terms of R1:
Equation 2
V THX
R1 = R2 --------------- – 1
0.62V
The STM6700/STM6710 have an input current of less than ±0.2 µA (±0.4 µA for VIN1)
on their adjustable inputs, therefore resistor values of up to 100 kW can be used for R2
with < 1 % error.
Figure 7. Adjustable thresholds monitoring
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Device operation
4.3
STM6700, STM6710
Unused inputs
Connect unused monitor inputs to a supply voltage greater in magnitude than their specified
threshold voltages. For unused VxIN adjustable inputs connect a 1 MW resistor between the
unused input and V2IN or (VCC) to limit the bias current. Use V2IN for normal operation
(device power supply pin). Do not connect unused monitor inputs to ground or allow them to
float.
4.4
Adding manual reset capability
Figure 8 shows a circuit which can be used to add manual reset capability to the STM6710.
Depressing the push button switch short-circuits the analog input to ground and initiates
a RESET pulse. The switch must be open for at least 140 ms in order to deassert the
RESET output. No external switch debounce is required. A small capacitor may be used to
improve noise immunity. Figure 8 shows the addition of the manual reset capability.
Figure 8. Adding manual reset capability for STM6710 input
V1IN
V2IN
V3IN
RESET
R1
V4IN
(ADJUSTABLE
INPUT)
R2
GND
AM04624v1
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STM6700, STM6710
5
Maximum ratings
Maximum ratings
Stressing the device above the ratings listed in Table 3 may cause permanent damage to
the device. These are stress ratings only and operation of the device at these or any other
conditions above those indicated in Table 4 of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability. Refer
also to the STMicroelectronics™ SURE program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol
TSTG
TSLD(1)
Parameter
Storage temperature (VCC off)
Lead solder temperature for 10 seconds
Value
Unit
–55 to 150
°C
260
VIO
Input or output voltage
VCC
Supply voltage
–0.3 to + 7
IO
Output current
20
mA
qJA
Thermal resistance (junction to ambient)
N/A
°C/W
–0.3 to VCC + 0.3
V
1. Reflow at peak temperature of 260 °C. The time above 255 °C must not exceed 30 seconds.
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DC and AC parameters
6
STM6700, STM6710
DC and AC parameters
This section summarizes the DC and AC characteristics of the device. The parameters in
Table 5 are derived from tests performed under the test conditions. Designers should check
that the operating conditions in their circuit match the operating conditions when relying on
the quoted parameters.
Table 4. Operating and AC measurement conditions
Parameter
Conditions
V2IN supply voltage (TA = 0 to T_max °C)
1.0 to 5.5
V2IN supply voltage (TA = -40 to T_max °C)
1.2 to 5.5
VCC supply voltage (for STM6700 and STM6710Q)
2.0 to 5.5
Ambient operating temperature (TA)
-40 to 105
Unit
V
°C
Table 5. DC and AC characteristics
Alt.
Symbol
Parameter
V2IN
Operating voltage
VCC
VCC
IxIN
ICC
I2N
Typ.(1)
Test conditions
Min.
TA = 0 to T_max °C
1.0
5.5
TA = –40 to T_max °C
1.2
5.5
2.0
5.5
STM6700 and
STM6710Q
Max.
VxIN nominal input voltage
(1.8 V, 2.5 V, 5.0 V supplies)
25
40
V2IN = nominal input voltage
for 3.0 V and 3.3 V supplies
55
115
Input current
I2N input current
Unit
V
µA
V1IN = 0 to 0.85 V
(for adjustable thresholds)
0.4
V3IN, V4IN = 0 to 0.85 V
(for adjustable thresholds)
0.2
STM6700 and STM6710Q only
VCC = 5.5 V
35
50
µA
Voltage thresholds
Vrst
12/20
VTH
VxIN falling
5 V (–5%)
4.500
4.630
4.750
5 V (–10%)
4.250
4.380
4.450
3.3 V (–5%)
3.000
3.080
3.150
3.3 V (–10%)
2.850
2.930
3.000
3.0 V (–5%)
2.700
2.780
2.850
3.0 V (–10%)
2.550
2.630
2.70
2.5 V (–5%)
2.250
2.320
2.380
2.5 V (–10%)
2.130
2.190
2.250
1.8 V (–5%)
1.620
1.670
1.710
DocID16887 Rev 4
V
STM6700, STM6710
DC and AC parameters
Table 5. DC and AC characteristics (continued)
Alt.
Symbol
Vrst
VTH
VxIN falling
Vrstxin
VREF
V1IN, V2IN, V3IN,
V4IN adj. reset
threshold voltage
VHYST
Parameter
Test conditions
Min.
Typ.(1)
Max.
1.8 V (–10%)
1.530
1.580
1.620
VxIN decreasing
0.611
0.620
0.629
Unit
V
Hysteresis of VTH
Reset threshold
TCVTH temperature
coefficient
0.3
% VTH
60
ppm/°C
30
µs
Reset
tRD
tRPD
VTH to reset
asserted delay
VxIN falling at 10 mV/µs from VTH
to (VTH –50 mV)
tRP
tREC
Reset timeout
delay
STM6710
Propagation delay
tPD
VOL
RESET output low
VOH
RESET output
high
IOH
RESET output
high source
current
140
STM6700 only
200
280
5
µs
V2IN, VCC = 5 V, ISINK = 2 mA
0.3
V2IN, VCC = 2.5 V, ISINK = 1.2 mA
0.4
V2IN = 1.0 V, ISINK = 50 µA,
TA = 0 to T_max °C
0.3
VCC ³ 2.0 V, ISOURCE = 6 µA, RESET
deasserted (STM6700)
0.8 x
VCC
VCC ³ VTH, ISOURCE = –6 µA, RESET
deasserted
0.8 x
V2IN
V2IN ³ 2.0 V, RESET deasserted
ms
10
V
µA
1. V2IN = 1 V to 5.5 V, TA = –40 to T_max °C, unless otherwise stated. Typical values are at V2IN = 3.0 V to 3.3 V,
TA = +25 °C. T_max = 85 °C or 105 °C depending on the product version.
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20
Package mechanical data
7
STM6700, STM6710
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK is an ST trademark.
7.1
SOT23 - 6-lead small outline transistor package information
Figure 9. SOT23 – 6-lead small outline transistor package outline
7049714_F
14/20
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STM6700, STM6710
Package mechanical data
Table 6. SOT23 – 6-lead small outline transistor package mechanical data
Dimensions
Symbol
mm
Min.
Typ.
inches
Max.
Min.
Typ.
Max.
A
0.9
1.45
0.035
0.057
A1
0
0.10
0
0.0039
A2
0.9
1.3
0.035
0.0512
b
0.35
0.5
0.014
0.02
c
0.09
0.2
0.004
0.008
D
2.8
3.05
0.11
0.120
E
1.5
1.75
0.059
0.0689
e
0.95
0.037
H
2.6
3
0.102
0.118
L
0.1
0.6
0.004
0.024
q
0°
10°
0°
10°
Figure 10. SOT23-6 landing pattern
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20
Package mechanical data
STM6700, STM6710
Figure 11. Carrier tape for SOT23-6
P0
E
P2
D
T
A0
F
TOP COVER
TAPE
W
B0
P1
CENTER LINES
OF CAVITY
K0
USER DIRECTION OF FEED
AM03073v1
Table 7. Carrier tape dimensions for SOT23-6
Package
W
D
8.00
1.50
SOT23-6 +0.30/ +0.10/
–0.10 –0.00
16/20
E
1.75
±0.10
P0
P2
F
4.00
2.00
3.50
±0.10 ±0.10 ±0.05
A0
B0
K0
3.23
±0.10
3.17
±0.10
1.37
±0.10
DocID16887 Rev 4
P1
T
Unit
Bulk
qty.
4.00 0.254
mm 3000
±0.10 ±0.013
STM6700, STM6710
8
Part numbering
Part numbering
Table 8. Ordering information scheme
Example:
STM6710
F
WB
6
F
Device type
STM6700 (1)
STM6710
Threshold combination
Refer to Table 9
Package
WB = SOT23-6
Temperature range
6 = –40 to 85 °C
7 = –40 to 105 °C
Shipping method
F = ECOPACK® package, tape and reel packing
1. Contact local ST sales office for availability
For other options, or for more information on any aspect of this device, please contact the
ST sales office nearest you.
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20
STM6700 / STM6710 device selector guide
9
STM6700, STM6710
STM6700 / STM6710 device selector guide
The STM6700/STM6710 are designed for various voltage thresholds and configurations,
however not all variations are shown in Table 9. Please contact local ST sales office for
availability.
Table 9. STM6700/STM6710 device selector summary
Monitored pins
Supply
tolerance
(%)
Top
marking
10
D6BA
5
D6BB
10
D6BC
STM6710DWB6F
5
D6BD
Available
STM6710EWB6F
10
D6BE
Contact ST sales office
Order code
Supply
V1IN V2IN V3IN V4IN
pin
(V)
(V)
(V)
(V)
tREC
(ms)
STM6710AWB6F
Comments
2.5
STM6710BWB6F
5
Contact ST sales office
Adj.
STM6710CWB6F
1.8
STM6710FWB6F
Adj.
2.5
1.8
D6BF
5
STM6710FWB7F
Available
D7BF
3.3
STM6710GWB6F
10
D6BG
5
D6BH
10
D6BI
STM6710JWB6F
5
D6BJ
STM6710KWB6F
10
D6BK
5
Adj.
STM6710HWB6F
V2IN
Contact ST sales office
200
STM6710IWB6F
2.5
Available
1.8
STM6710LWB6F
STM6710LWB7F
D6BL
Adj.
5
D7BL
Adj.
STM6710MWB6F
10
D6BM
5
D6BN
10
D6BO
5
D6BP
N/A
D6BQ
2.5
STM6710NWB6F
3
STM6710OWB6F
1.8
STM6710PWB6F
STM6710QWB6F
18/20
VCC
Adj.
VCC
N/A
DocID16887 Rev 4
Contact ST sales office
STM6700, STM6710
10
Revision history
Revision history
Table 10. Document revision history
Date
Revision
Changes
09-Dec-2009
1
Initial release.
15-May-2012
2
Added Table 4 and cross-reference to Table 4 in Section 5,
updated Section 1, Table 9, minor corrections throughout
document.
11-Feb-2015
3
Added order code STM6710FWB7F and updated temperature
range throughout document from “-40 °C to 85 °C” to “-40 °C to
105 °C”.
Table 1 and Table 9: replaced “part number/name” with “order
code”.
Table 9: removed order code STM6700WB6F
24-Sep-2020
4
Updated Table 1: Device summary and Table 9:
STM6700/STM6710 device selector summary.
DocID16887 Rev 4
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20
STM6700, STM6710
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