SGM895/SGM896/SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
GENERAL DESCRIPTION
FEATURES
The
SGM895/SGM896/SGM897/SGM898/SGM899
are ultra-small, low-power and high-accuracy microprocessor supervisory circuits with adjustable
sequencing capability. Since the high-impedance
detection input pin (IN) with a 0.5V threshold voltage is
separated from the power supply, these devices offer
tremendous flexibility with an adjustable threshold
using an external resistive divider. Moreover, the delay
time can be adjusted by an external capacitor
connected to the CDELAY pin. These devices are ideal
for power-supply sequencing, reset sequencing and
power-switching applications.
● High Voltage Threshold Accuracy:
+25℃: ±1%
-40℃ to +125℃: ±1.6%
● Low Power Consumption: 2.1μA (TYP)
● Operating Supply Voltage Range: 1.6V to 5.5V
● Capacitor-Adjustable Delay
● Active-High/Active-Low Enable Input Options
● Active-High/Active-Low Output Options
● Open-Drain (28V Tolerant)/Push-Pull Output Options
● Available in Ultra-Small Green UTDFN-1.45×1-6AL
and TSOT-23-6 Packages
When the input voltage at IN (VIN) exceeds the VTH
threshold voltage (0.5V, TYP) and the enable input is
asserted (ENABLE = high or nENABLE = low), the
output asserts (OUT = high or nOUT = low). When VIN
falls below VTH - VHYST (0.495V, TYP) or when the enable
input is deasserted (ENABLE = low or nENABLE = high),
the output deasserts (OUT = low or nOUT = high). All
devices provide a capacitor-adjustable input delay time
(tDELAY) from when VIN exceeds VTH to when the output
asserts. The SGM89_A provide the same capacitoradjustable delay time from when the enable is asserted
to when the output asserts, whereas the SGM89_P
provide a 350ns (TYP) propagation delay time from
when the enable is asserted to when the output
asserts.
The SGM895 provides an active-high enable input and
an active-high push-pull output. The SGM896 provides
an active-low enable input and an active-low push-pull
output. The SGM897 provides an active-high enable
input and an active-high open-drain output. The
SGM898 provides an active-low enable input and an
active-low open-drain output. Finally, the SGM899
provides an active-low enable with an active-high
push-pull output.
All devices are available in ultra-small Green
UTDFN-1.45×1-6AL and TSOT-23-6 packages.
SG Micro Corp
www.sg-micro.com
APPLICATIONS
Portable Equipment
Computers/Servers
Critical μP Monitoring
Automotive
Medical Equipment
Intelligent Instruments
TYPICAL APPLICATION
1.6V to 5.5V
100nF
ENABLE
VCC
R1
OUT
IN
R2
SGM895
CDELAY
GND
CCDELAY
Figure 1. Typical Application Circuit
OCTOBER 2021 – REV. A.2
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
PACKAGE/ORDERING INFORMATION
MODEL
SGM895A
SGM895P
SGM896A
SGM896P
SGM897A
SGM897P
SGM898A
SGM898P
SGM899A
SGM899P
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM895AXUDL6G/TR
J9X
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM895AXTN6G/TR
CICXX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM895PXUDL6G/TR
IAX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM895PXTN6G/TR
CKFXX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM896AXUDL6G/TR
QBX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM896AXTN6G/TR
CL0XX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM896PXUDL6G/TR
QCX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM896PXTN6G/TR
CL1XX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM897AXUDL6G/TR
I8X
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM897AXTN6G/TR
CIDXX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM897PXUDL6G/TR
IBX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM897PXTN6G/TR
CL2XX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM898AXUDL6G/TR
QDX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM898AXTN6G/TR
CL3XX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM898PXUDL6G/TR
QEX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM898PXTN6G/TR
CL4XX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM899AXUDL6G/TR
I9X
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM899AXTN6G/TR
CIEXX
Tape and Reel, 3000
UTDFN-1.45×1-6AL
-40°C to +125°C
SGM899PXUDL6G/TR
ICX
Tape and Reel, 5000
TSOT-23-6
-40°C to +125°C
SGM899PXTN6G/TR
CL5XX
Tape and Reel, 3000
MARKING INFORMATION
NOTE: X = Date Code. XX = Date Code
UTDFN-1.45×1-6AL
YY X
Date Code - Quarter
Serial Number
TSOT-23-6
YYY X X
Date Code - Week
Date Code - Year
Serial Number
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
2
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
ABSOLUTE MAXIMUM RATINGS
VCC, ENABLE, nENABLE, IN ............................... -0.3V to 6V
OUT, nOUT (Push-Pull) ...........................-0.3V to VCC + 0.3V
OUT, nOUT (Open-Drain) .................................. -0.3V to 30V
CDELAY...................................................-0.3V to VCC + 0.3V
Output Current (All Pins) ............................................. ±20mA
Package Thermal Resistance
UTDFN-1.45×1-6AL, θJA .......................................... 294℃/W
TSOT-23-6, θJA ........................................................ 230℃/W
Junction Temperature .................................................+150℃
Storage Temperature Range ....................... -65℃ to +150℃
Lead Temperature (Soldering, 10s) ............................+260℃
ESD Susceptibility
HBM ............................................................................. 4000V
CDM ............................................................................ 1000V
RECOMMENDED OPERATING CONDITIONS
Operating Junction Temperature Range ...... -40℃ to +125℃
Operating Ambient Temperature Range....... -40℃ to +125℃
OVERSTRESS CAUTION
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SELECTOR GUIDE
DEVICE
ENABLE INPUT
OUTPUT
INPUT DELAY TIME
ENABLE DELAY TIME
SGM895A
Active-High
Active-High, Push-Pull
Capacitor-Adjustable
Capacitor-Adjustable
SGM895P
Active-High
Active-High, Push-Pull
Capacitor-Adjustable
350ns Delay
SGM896A
Active-Low
Active-Low, Push-Pull
Capacitor-Adjustable
Capacitor-Adjustable
SGM896P
Active-Low
Active-Low, Push-Pull
Capacitor-Adjustable
350ns Delay
SGM897A
Active-High
Active-High, Open-Drain
Capacitor-Adjustable
Capacitor-Adjustable
SGM897P
Active-High
Active-High, Open-Drain
Capacitor-Adjustable
350ns Delay
SGM898A
Active-Low
Active-Low, Open-Drain
Capacitor-Adjustable
Capacitor-Adjustable
SGM898P
Active-Low
Active-Low, Open-Drain
Capacitor-Adjustable
350ns Delay
SGM899A
Active-Low
Active-High, Push-Pull
Capacitor-Adjustable
Capacitor-Adjustable
SGM899P
Active-Low
Active-High, Push-Pull
Capacitor-Adjustable
350ns Delay
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
3
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
PIN CONFIGURATIONS
SGM895/SGM897 (TOP VIEW)
ENABLE
1
6
VCC
GND
2
5
CDELAY
IN
3
4
OUT
SGM895/SGM897 (TOP VIEW)
ENABLE
1
6
CDELAY
GND
2
5
VCC
IN
3
4
OUT
UTDFN-1.45×1-6AL
TSOT-23-6
SGM896/SGM898 (TOP VIEW)
nENABLE
1
6
VCC
GND
2
5
CDELAY
IN
3
4
nOUT
SGM896/SGM898 (TOP VIEW)
nENABLE
1
6
CDELAY
GND
2
5
VCC
IN
3
4
nOUT
UTDFN-1.45×1-6AL
TSOT-23-6
SGM899 (TOP VIEW)
SGM899 (TOP VIEW)
nENABLE
1
6
VCC
GND
2
5
CDELAY
IN
3
4
OUT
UTDFN-1.45×1-6AL
SG Micro Corp
www.sg-micro.com
nENABLE
1
6
CDELAY
GND
2
5
VCC
IN
3
4
OUT
TSOT-23-6
OCTOBER 2021
4
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
PIN DESCRIPTION
PIN
SGM895/SGM897
SGM896/SGM898
SGM899
NAME
FUNCTION
UTDFNTSOTUTDFNTSOTUTDFNTSOT1.45×1-6AL 23-6 1.45×1-6AL 23-6 1.45×1-6AL 23-6
1
1
—
—
—
—
—
—
1
1
1
1
2
2
2
2
2
2
3
3
3
3
3
3
4
4
—
—
4
4
—
—
4
4
—
—
5
6
5
6
5
6
6
5
6
5
6
5
SG Micro Corp
www.sg-micro.com
Active-High Enable Input. Set ENABLE low immediately to
deassert the output to its false state (OUT = low) independent
of VIN. With VIN above VTH, set ENABLE high to assert the
ENABLE
output to its true state (OUT = high) after the CDELAY
adjustable delay period (SGM89_A) or a 350ns propagation
delay (SGM89_P).
Active-Low Enable Input. Set nENABLE high immediately to
deassert the output to its false state (OUT = low or nOUT =
high) independent of VIN. With VIN above VTH, set nENABLE
nENABLE
low to assert the output to its true state (OUT = high or nOUT =
low) after the CDELAY adjustable delay period (SGM89_A) or
a 350ns propagation delay (SGM89_P).
GND
Ground.
High-Impedance Detection Input. Connect the IN pin to an
external resistive divider to set the desired detection threshold.
IN
The output state changes when VIN exceeds VTH (0.5V, TYP) or
when VIN drops below VTH - VHYST (0.495V, TYP).
Active-High Output, Push-Pull (SGM895/SGM899) or Open-Drain
(SGM897). When VIN exceeds VTH and the enable input is
asserted (ENABLE = high or nENABLE = low), the output
asserts (OUT = high) after the CDELAY adjustable delay
OUT
period. The output deasserts (OUT = low) immediately after VIN
drops below VTH - VHYST or the enable input is deasserted
(ENABLE = low or nENABLE = high).
The open-drain version requires an external pull-up resistor.
Active-Low Output, Push-Pull (SGM896) or Open-Drain
(SGM898). When VIN exceeds VTH and the enable input is
asserted (nENABLE = low), the output asserts (nOUT = low)
nOUT
after the CDELAY adjustable delay period. The output
deasserts (nOUT = high) immediately after VIN drops below VTH
- VHYST or the enable input is deasserted (nENABLE = high).
The open-drain version requires an external pull-up resistor.
Capacitor-Adjustable Delay. Connect an external capacitor
(CCDELAY) between CDELAY and GND to set the delay period.
CDELAY
tDELAY (ms) = 3.95 × CCDELAY (nF) + 0.048ms
There is a 50µs (TYP) fixed delay for the output deasserting
when VIN falls below VTH - VHYST.
VCC
Supply Voltage.
OCTOBER 2021
5
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
ELECTRICAL CHARACTERISTICS
(VCC = 1.6V to 5.5V, Full = -40℃ to +125℃, typical values are at VCC = 3.3V and TJ = +25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMP
MIN
Full
Full
TYP
MAX
UNITS
1.6
5.5
V
1.31
1.49
V
2.1
7.8
µA
Supply
Operating Voltage Range
Under-Voltage Lockout
(1)
VCC Supply Current
VCC
VUVLO
VCC falling
ICC
Full
IN
Threshold Voltage
Hysteresis
Input Current
VTH
VHYST
IIN
VIN rising, 1.6V < VCC < 5.5V
+25℃
0.495
0.500
0.505
Full
0.492
0.500
0.508
VIN falling
Full
5
VIN = 0V or VCC
Full
-20
Full
210
Full
0.96
V
mV
20
nA
253
290
nA
1.00
1.04
V
120
350
Ω
0.4
V
CDELAY
Delay Charge Current
Delay Threshold
CDELAY Pull-Down Resistance
ICD
VTCD
CDELAY rising
RCDELAY
Full
Input Low Voltage
VIL
Full
Input High Voltage
VIH
Full
1.4
Input Leakage Current
ILEAK
ENABLE, nENABLE = VCC or GND
Full
-50
VCC ≥ 1.2V, ISINK = 90µA,
SGM895/SGM897/SGM899 only
Full
0.3
VCC ≥ 2.25V, ISINK = 0.5mA
Full
0.3
VCC ≥ 4.5V, ISINK = 1mA
Full
0.4
VCC ≥ 2.25V, ISOURCE = 500µA
Full
0.8 × VCC
VCC ≥ 4.5V, ISOURCE = 800µA
Full
0.8 × VCC
Output high impedance, VOUT = 28V
Full
ENABLE/nENABLE
V
50
nA
OUT/nOUT
Output Low Voltage
(Open-Drain or Push-Pull)
VOL
Output High Voltage (Push-Pull)
VOH
Output Open-Drain Leakage
Current
ILKG
V
V
1
µA
Timing
IN to OUT/nOUT Propagation
Delay
ENABLE/nENABLE Minimum Input
Pulse Width
tDELAY
VIN rising
tDL
VIN falling
CCDELAY = 0nF
Full
48
µs
CCDELAY = 47nF
Full
185
ms
Full
50
µs
tPW
Full
ENABLE/nENABLE Glitch Rejection
ENABLE/nENABLE to OUT/nOUT
Delay
ENABLE/nENABLE to OUT/nOUT
Delay
tOFF
tPROPP
tPROPA
From device enabled to device disabled
From device disabled to device enabled
(SGM89_P)
From device disabled CCDELAY = 0nF
to device enabled
CCDELAY = 47nF
(SGM89_A)
1.1
µs
Full
210
ns
Full
350
ns
Full
350
ns
Full
30
µs
Full
185
ms
NOTES:
1. When VCC falls below the UVLO threshold, the outputs will deassert (OUT goes low or nOUT goes high).
2. The output state is not guaranteed when VCC falls below 1.2V.
3. During the initial power-up, VCC must exceed 1.6V for at least 2ms before the output is guaranteed to be in the correct state.
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
6
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
TYPICAL PERFORMANCE CHARACTERISTICS
VCC = 3.3V and TJ = +25℃, unless otherwise noted.
Supply Current vs. Temperature
5.0
2.7
4.5
2.4
4.0
2.1
3.5
1.8
3.0
ICC (μA)
ICC (μA)
Supply Current vs. Supply Voltage
3.0
1.5
1.2
2.0
1.5
0.6
1.0
0.3
0.5
0.0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
VCC = 3V
2.5
0.9
0.0
VCC = 5V
5.5
VCC = 1.5V
-40 -25 -10
IN Threshold vs. Temperature
OUT Delay vs. CCDELAY
4500
0.5010
4000
0.5005
3500
tDELAY (ms)
0.5000
VTH (V)
20 35 50 65 80 95 110 125
Temperature (℃)
VCC (V)
0.4995
0.4990
3000
2500
2000
1500
1000
0.4985
0.4980
5
500
-40 -25 -10
5
0
20 35 50 65 80 95 110 125
0
200
400
Temperature (℃)
600
800
1000
CCDELAY (nF)
Output Low Voltage vs. Sink Current
(SGM895/SGM896/SGM899)
Output Low Voltage vs. Sink Current
(SGM897/SGM898)
1.5
1.5
1.2
1.2
0.9
0.9
VCC = 1.5V
VCC = 3V
VCC = 1.5V
VOL (V)
VOL (V)
VCC = 3V
0.6
0.3
0.6
VCC = 5V
0.3
VCC = 5V
0.0
0
2
4
6
8
10
ISINK (mA)
SG Micro Corp
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12
14
16
18
0.0
0
2
4
6
8
10
12
14
16
18
ISINK (mA)
OCTOBER 2021
7
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VCC = 3.3V and TJ = +25℃, unless otherwise noted.
Output High Voltage vs. Source Current
(SGM895/SGM896/SGM899)
5.0
500
4.0
VOH (V)
VCC = 5V
VCC = 3V
3.5
Maximum Transient Duration (μs)
4.5
3.0
2.5
2.0
VCC = 1.5V
1.5
1.0
0.5
0.0
0
2
4
6
8
10
12
14
16
18
Maximum Transient Duration vs. Input Overdrive
450
400
350
300
250
200
Reset Occurs
150
100
50
0
0
10
20
30
40
50
60
70
80
90 100
ISOURSE (mA)
VOVERDRIVE (mV)
Enable Turn-On/Off Delay (SGM895A)
Enable Turn-On/Off Delay (SGM895P)
ENABLE
2V/div
ENABLE
Time (40μs/div)
SG Micro Corp
www.sg-micro.com
2V/div
2V/div
OUT
2V/div
OUT
Time (200ns/div)
OCTOBER 2021
8
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
FUNCTIONAL BLOCK DIAGRAM
ENABLE (SGM895)
nENABLE (SGM896/SGM899)
VCC
+
IN
Logic
-
0.5V
OUT (SGM895/SGM899)
nOUT (SGM896)
253nA
1.0V
+
SGM895
SGM896
SGM899
CDELAY
GND
Figure 2. SGM895/SGM896/SGM899 Block Diagram
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
9
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
DETAILED DESCRIPTION
The
SGM895/SGM896/SGM897/SGM898/SGM899
are low-power and high-accuracy microprocessor
supervisory circuits with adjustable sequencing
capability.
When VIN exceeds VTH, the enable input can be used to
set the output asserted or deasserted. After the enable
input is asserted, the output asserts with the CDELAY
adjusted delay period (SGM89_A) or with a 350ns fixed
propagation delay (SGM89_P). Table 1, 2, and 3 show
the details of the output state depending on the various
input and enable conditions.
Table 1. SGM895/SGM897 Output
IN Pin
ENABLE Pin
OUT Pin
VIN < VTH
Low
Low
VIN < VTH
High
Low
VIN > VTH
Low
VIN > VTH
High
Low
OUT = VCC (SGM895)
OUT = high-impedance (SGM897)
nENABLE Pin
VIN < VTH
Low
VIN < VTH
High
VIN > VTH
Low
VIN > VTH
High
Connect a resistive divider to IN pin to monitor external
voltages (see R1 and R2 of the Typical Application
Circuit). IN has a rising threshold of VTH = 0.5V and a
falling threshold of 0.495V (5mV hysteresis). When VIN
exceeds VTH and the enable input is asserted (ENABLE
= high or nENABLE = low), OUT goes high (nOUT goes
low) after a tDELAY period. When VIN falls below 0.495V,
OUT goes low (nOUT goes high) after a 50µs delay. IN
has a maximum ±20nA input leakage current, so it is
permitted to use larger-value resistors without adding
significant error to the resistive divider.
Adjustable Delay (CDELAY)
Low
nOUT = VCC (SGM896)
tDELAY (ms) = 3.95 × CCDELAY (nF) + 0.048ms
nOUT = high-impedance (SGM898)
where CCDELAY is the external capacitor from CDELAY
to GND.
nOUT Pin
nOUT = VCC (SGM896)
nOUT = high-impedance (SGM898)
nOUT = VCC (SGM896)
nOUT = high-impedance (SGM898)
Table 3. SGM899 Output
IN Pin
nENABLE Pin
OUT Pin
VIN < VTH
Low
Low
VIN < VTH
High
Low
VIN > VTH
Low
High
VIN > VTH
High
Low
Supply Voltage Input (VCC)
The device operates with a supply voltage range of
1.6V to 5.5V. When VCC falls below the UVLO threshold
voltage, the output deasserts. However, the output
state is not guaranteed when VCC falls below 1.2V. For
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Detection Input (IN)
When VIN > VTH and the enable pin is asserted
(ENABLE = high or nENABLE = low), the internal
253nA (TYP) current source begins to charge an
external capacitor connected between CDELAY and
GND. When the voltage at CDELAY reaches 1V, the
output asserts (OUT goes high or nOUT goes low).
When the output asserts, CCDELAY is immediately
discharged. Adjust the delay time according to the
equation:
Table 2. SGM896/SGM898 Output
IN Pin
noisy systems, it is recommended to place a 100nF
bypass capacitor close to the VCC pin. For the
active-high push-pull output device, connecting a
100kΩ external pull-down resistor to ground ensures
the correct logic state for VCC down to 0.
(1)
Under the condition of VIN > VTH, the output state
depends on the state of ENABLE (nENABLE). For
adjustable delay devices (SGM89_A), when ENABLE
goes from low to high (nENABLE goes from high to low)
the output asserts after a tDELAY period. For propagation
delay devices (SGM89_P), there is a 350ns fixed
propagation delay from when the enable input is
asserted to when the output asserts. Figure 3 through 8
show the timing diagrams of the adjustable and fixed
delay devices, respectively.
OCTOBER 2021
10
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
DETAILED DESCRIPTION (continued)
VCC
VUVLO
IN
VTH
VTH - VHYST
t < tPROPA
ENABLE
t > tPW
OUT
tPROPA
tDELAY
tDL
tPROPA
tOFF
Figure 3. SGM895A/SGM897A Timing Diagram
VCC
VUVLO
IN
VTH - VHYST
VTH
t > tPW
ENABLE
OUT
tDELAY
tPROPP
tDL
tOFF
tPROPP
Figure 4. SGM895P/SGM897P Timing Diagram
SG Micro Corp
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OCTOBER 2021
11
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
DETAILED DESCRIPTION (continued)
VCC
VUVLO
IN
VTH
VTH - VHYST
t < tPROPA t > tPW
nENABLE
nOUT
tDELAY
tPROPA
tDL
tPROPA
tOFF
Figure 5. SGM896A/SGM898A Timing Diagram
VCC
VUVLO
IN
VTH - VHYST
VTH
t > tPW
nENABLE
nOUT
tDELAY
tPROPP
tDL
tOFF
tPROPP
Figure 6. SGM896P/SGM898P Timing Diagram
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
12
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
DETAILED DESCRIPTION (continued)
VCC
VUVLO
IN
VTH
VTH - VHYST
t < tPROPA t > tPW
nENABLE
OUT
tDELAY
tPROPA
tDL
tPROPA
tOFF
Figure 7. SGM899A Timing Diagram
VCC
VUVLO
IN
VTH - VHYST
VTH
t > tPW
nENABLE
OUT
tPROPP
tDL
tDELAY
tOFF
tPROPP
Figure 8. SGM899P Timing Diagram
Enable Input (ENABLE or nENABLE)
The SGM895/SGM897 provide an active-high enable
input (ENABLE), while the SGM896/SGM898/SGM899
provide an active-low enable input (nENABLE). When
VIN > VTH, SGM89_A provide an adjustable delay
period from when ENABLE is asserted to when the
output asserts, while SGM89_P provide a fixed
propagation delay time.
The enable input offers logic-high threshold of 1.4V and
logic-low threshold of 0.4V. When VIN > 0.5V, set
ENABLE low (nENABLE high) to force OUT low (nOUT
high) within tPROPP.
SG Micro Corp
www.sg-micro.com
Output (OUT or nOUT)
The SGM895/SGM899 offer an active-high push-pull
output (OUT), while the SGM896 offers an active-low
push-pull output (nOUT). The SGM897 offers an
active-high open-drain output (OUT), while the SGM898
offers an active-low open-drain output (nOUT).
The push-pull output devices are referenced to VCC.
The open-drain outputs can be pulled up to 28V.
OCTOBER 2021
13
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
APPLICATION INFORMATION
Input Threshold
The SGM895/SGM896/SGM897/SGM898/SGM899
detect the voltage on IN through an external resistive
divider (see R1 and R2 in the Typical Application Circuit).
Connect R1 and R2 as close to IN as possible to avoid
the environment noise. The resistor values of R1 and R2
can be very high to minimize current consumption due
to low IN leakage current. For example, set R2 to 1MΩ
and calculate R1 based on the desired detection
voltage by the following equation:
V
R=
R2 × MONITOR - 1
1
V
TH
(2)
where VMONITOR is the desired detection voltage and VTH
is the detector input threshold (0.5V).
Pull-Up Resistor Values (SGM897/SGM898)
The exact pull-up resistor values for the open-drain
outputs are not critical, however, proper logic levels
should be ensured. For example, if VCC = 2.25V and the
pull-up voltage is 28V, users should keep the sink
current less than 0.5mA as shown in the Electrical
Characteristics Table. As a result, the pull-up resistor
should be greater than 56kΩ. For a 12V pull-up, the
resistor should be larger than 24kΩ. Note that the
ability to sink current is dependent on the VCC supply
voltage.
Typical Application Circuits
Figure 9, 10 and 11 show typical applications for the
SGM895/SGM896/SGM897/SGM898/SGM899. Figure
9 shows that the SGM897 is used as an over-voltage
protection circuit by a P-channel MOSFET. Figure 10
shows that the SGM895 is used as a low-voltage
sequencing circuit by an N-channel MOSFET. Finally,
Figure 11 shows that the SGM895 is used in a
multiple-output sequencing application.
Using an N-Channel Device for Sequencing
In higher power applications, the power loss of
N-channel MOSFET can be reduced due to its lower
on-resistance. However, it requires a sufficient positive
VGS voltage to fully turn on. The application in Figure 10
shows the SGM895 in a switch sequencing application
using an N-channel MOSFET.
Similarly, if a higher voltage is present in the system,
the open-drain version can be used in the same
manner.
3.3V Always On
5V BUS
P
0 to 28V
ENABLE
VCC
N 1.2V Output
Monitered
3.3V
ENABLE
RPULL-UP
R1
1.2V Output
VCC
R1
OUT
OUT
SGM897
SGM895
IN
IN
CDELAY
R2
CDELAY
R2
GND
Figure 9. Over-Voltage Protection
GND
CCDELAY
Figure 10. Low-Voltage Sequencing Using an N-Channel
MOSFET
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
14
SGM895/SGM896
SGM897/SGM898/SGM899
Ultra-Small, Supervisory Circuits
with Adjustable Sequencing
APPLICATION INFORMATION (continued)
3.3V
5V BUS
2.5V
1.2V
DC/DC
DC/DC
DC/DC
DC/DC
EN
System
ENABLE OFF
1.8V
EN
EN
EN
ON
ENABLE
IN
ENABLE
VCC
IN
SGM895
OUT
ENABLE
VCC
SGM895
IN
OUT
CCDELAY
SGM895
IN
OUT
CCDELAY
VCC
SGM895
OUT
GND
GND
GND
GND
ENABLE
VCC
CCDELAY
CCDELAY
Figure 11. Multiple-Output Sequencing
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
OCTOBER 2021 ‒ REV.A.1 to REV.A.2
Page
Updated UTDFN-1.45×1-6AL Package.......................................................................................................................................................... 4, 16
JULY 2021 ‒ REV.A to REV.A.1
Page
Changed Package/Ordering Information section .................................................................................................................................................. 2
Changes from Original (JULY 2020) to REV.A
Page
Changed from product preview to production data ............................................................................................................................................. All
SG Micro Corp
www.sg-micro.com
OCTOBER 2021
15
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
UTDFN-1.45×1-6AL
e
D
N6
E
L
DETAIL A
PIN 1#
TOP VIEW
DETAIL B
N1
b
L1
BOTTOM VIEW
SEATING PLANE
0.30
A
C
0.49
A2
A1
eee C
0.75
SIDE VIEW
L (L1)
L2
ALTERNATE A-1
ALTERNATE A-3
ALTERNATE A-2
0.5
DETAIL A
ALTERNATE TERMINAL CONSTRUCTION
RECOMMENDED LAND PATTERN (Unit: mm)
A2
ALTERNATE B-1
ALTERNATE B-2
A1
ALTERNATE B-3
DETAIL B
ALTERNATE CONSTRUCTION
Symbol
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
A
0.450
0.600
0.018
0.024
A1
0.000
0.050
0.000
0.002
A2
0.150 REF
0.006 REF
D
1.374
1.526
0.054
0.060
E
0.924
1.076
0.036
0.042
b
0.150
0.300
0.006
0.012
e
0.500 TYP
0.020 TYP
eee
0.050
0.002
L
0.250
0.450
0.010
0.018
L1
0.250
0.500
0.010
0.020
L2
0.000
0.100
0.000
0.004
NOTE: This drawing is subject to change without notice.
SG Micro Corp
www.sg-micro.com
TX00164.001
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TSOT-23-6
0.69
0.95
D
e
E1
2.59
E
0.99
b
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
θ
A1
0.25
c
A2
Symbol
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
1.000
0.043
A
A1
0.000
0.100
0.000
0.004
A2
0.700
0.900
0.028
0.039
b
0.300
0.500
0.012
0.020
c
0.080
0.200
0.003
0.008
D
2.850
2.950
0.112
0.116
E
1.550
1.650
0.061
0.065
E1
2.650
2.950
0.104
e
SG Micro Corp
www.sg-micro.com
0.950 BSC
0.116
0.037 BSC
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
TX00038.001
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
W
P0
Q1
Q2
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
Q3
Q4
B0
Reel Diameter
A0
P1
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel
Diameter
Reel Width
W1
(mm)
A0
(mm)
B0
(mm)
K0
(mm)
P0
(mm)
P1
(mm)
P2
(mm)
W
(mm)
Pin1
Quadrant
UTDFN-1.45×1-6AL
7″
9.5
1.15
1.60
0.75
4.0
4.0
2.0
8.0
Q1
TSOT-23-6
7″
9.5
3.20
3.10
1.10
4.0
4.0
2.0
8.0
Q3
SG Micro Corp
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TX10000.000
DD0001
Package Type
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Pizza/Carton
7″ (Option)
368
227
224
8
7″
442
410
224
18
SG Micro Corp
www.sg-micro.com
DD0002
Reel Type
TX20000.000
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