SIP32448DNP-T1-GE4

SiP32448, SiP32449
www.vishay.com
Vishay Siliconix
1.7 V to 5.5 V, 3 A Load Switch with Negative VIN Tolerance
DESCRIPTION
FEATURES
The SiP32448 and SiP32449 are low resistance slew rate
controlled load switches. The part operates from 1.7 V to
5.5 V supply and can tolerate negative voltage at input to
-2 V. The integrated charge pump drivers enable the part
with low on resistance over the wide input voltage range.
• 1.7 V to 5.5 V input voltage range
• Negative input voltage tolerance down to -2 V
• 38 m typical RON from 1.8 V to 5 V
• 3 A maximum continuous switch current
• Slew rate controlled turn-on: 2.5 ms at 3.6 V
Both SiP32448 and SiP32449 feature a controlled soft-on
slew rate of typical 2.5 ms that limits the inrush current for
designs of heavy capacitive load and minimizes the resulting
voltage droop at the power rails.
Available
• Constant low control logic: VIH = 1.15 V, VIL = 0.7 V
• 2 V UVLO when EN is open
• Reverse current blocking when switch is off or VIN is ground
The SiP32448 and SiP32449 feature a constant low voltage
control logic interface over the full operation voltage range.
It can interface with low voltage control signals without extra
level shifting circuit. When EN is left open, the part will not
turn on until VIN is greater than 2.5 V.
• Output discharge (SiP32449)
• ESD protected
- HBM: >6 kV
- MM: >300 V
- IEC61000-4-2 air discharge: >15 kV
- IEC61000-4-2 contact discharge: >8 kV
The SiP32449 has a output discharge to help discharge the
output capacitor during shutdown mode for fast turn off.
• Compact TDFN4 package
The SiP32448 and SiP32449 have exceptionally low
shutdown current and provides reverse blocking to prevent
high current flowing into the power source when the switch
is off or VIN is ground.
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS
Both SiP32448 and SiP32449 are available in TDFN4
package of 1.2 mm x 1.6 mm x 0.55 mm.
• PDAs / smart phones
• Notebook / netbook computers
• Tablet PC
• Portable media players
• Digital camera
• GPS navigation devices
• Data storage devices
• Optical, industrial, medical, and healthcare devices

TYPICAL APPLICATION CIRCUIT
VIN
IN
OUT
VOUT
SiP32448, SiP32449
C IN
2.2 µF
C OUT
1 µF
EN
EN
GND
GND
GND
Fig. 1 - SiP32448, SiP32449 Typical Application Circuit
S15-1920-Rev. C, 24-Aug-15
Document Number: 62959
1
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
SiP32448, SiP32449
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ORDERING INFORMATION
Part Number
Package
SiP32448DNP-T1-GE4
Marking
TDFN4 1.2 mm x 1.6 mm
SiP32449DNP-T1-GE4
Output Discharge
Lx
No
Px
Yes
Temperature Range
-40 °C to +85 °C
Notes
• x = Lot code
• GE4 denotes halogen-free and RoHS compliant
ABSOLUTE MAXIMUM RATINGS
Parameter
Limit
Supply Input Voltage (VIN)
-2 to +6
Enable Input Voltage (VEN)
-2 to +6
Output Voltage (VOUT)
V
-0.3 to +6
Maximum Continuous Switch Current (Imax.) c
4
Maximum Repetitive Pulsed Current (1 ms, 10 % Duty Cycle) c
Maximum Non-Repetitive Pulsed Current (100 μs, EN = Active)
Thermal Resistance (qJA)
12
-40 to +150
°C
170
°C/W
a
a,b
ESD Rating
A
7
c
Junction Temperature (TJ)
Power Dissipation (PD)
Unit
735
mW
HBM
6
kV
V
MM
300
IEC41000-4-2 Air Discharge d
15
IEC41000-4-2 Contact Discharge d
8
kV
Notes
a. Device mounted with all leads and power pad soldered or welded to PC board, see PCB layout.
b. Derate 5.9 mW/°C above TA = 25 °C, see PCB layout.
c. TA = 25 °C, see PCB layout.
d. Tested on VIN with 2.2 μF CIN. VIN connected to micro-USB connector.



Stresses beyond 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 specifications is not implied. Exposure to absolute maximum
rating/conditions for extended periods may affect device reliability. 

RECOMMENDED OPERATING RANGE
Parameter
Input Voltage Range (VIN)
Operating Junction Temperature Range (TJ)
S15-1920-Rev. C, 24-Aug-15
Limit
Unit
1.7 to 5.5
V
-40 to +125
°C
Document Number: 62959
2
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
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SiP32448, SiP32449
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Vishay Siliconix
SPECIFICATIONS
Parameter
Operating Voltage c
Limits
-40 °C to +85 °C
Test Conditions Unless Specified
VIN = 5 V, TA = -40 °C to +85 °C
(Typical values are at TA = 25 °C)
Symbol
VIN
Negative Input Voltage Tolerance
Under Voltage Lock Out
Max. a
1.7
-
5.5
V
mA
INEG
VIN = -2 V
-
-15
-
EN = open, 25 °C (switch On to Off)
-
-
2
UVLOL-H
EN = open, 25 °C (switch Off to On)
2.5
-
-
IQ
Quiescent Current
Typ. b
UVLOH-L
UVLOHYS
UVLO Hysteresis
Unit
Min. a
EN = open, 25 °C
-
0.25
-
VIN = 1.8 V, EN = active
-
35
50
VIN = 2.5 V, EN = active
-
54
90
VIN = 3.6 V, EN = active
-
78
110
VIN = 4.3 V, EN = active
-
93
130
VIN = 5 V, EN = active
-
110
180
EN = inactive, OUT = open
-
8
18
Off Supply Current
IQ(off)
Off Switch Current
IDS(off)
EN = inactive, OUT = GND
-
-
1
IRB
VOUT = 5 V, VIN = 0 V, VEN = inactive
-
-
10
VIN = 1.8 V, IL = 500 mA, TA = 25 °C
-
38
43
VIN = 2.5 V, IL = 500 mA, TA = 25 °C
-
38
43
VIN = 3.6 V, IL = 500 mA, TA = 25 °C
-
38
43
VIN = 4.3 V, IL = 500 mA, TA = 25 °C
-
38
43
VIN = 5 V, IL = 500 mA, TA = 25 °C
Reverse Blocking Current
RDS(on)
On-Resistance
-
38
43
TCRDS
-
3100
-
c
VIL
-
-
0.7
EN Input High Voltage c
VIH
1.15 d
-
-
On-Resistance Temp.-Coefficient
EN Input Low Voltage
V
VIN = 1.8 V to 5.5 V
μA
m
ppm/°C
d
V
EN Input Leakage
ISINK
VEN = 5.5 V
-6
-
6
μA
Output Pulldown Resistance
RPD
EN = inactive, TA = 25 °C (for SiP32449 only)
-
210
280

Output Turn-On Delay Time
td(on)
-
1.35
-
Output Turn-On Rise Time
t(on)
VIN = 3.6 V, Rload = 10 , TA = 25 °C
1
1.7
3.8
-
0.005
td(off)
Output Turn-Off Delay Time
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
c. For VIN outside this range consult typical EN threshold curve.
d. Not tested, guarantee by design.
ms
PIN CONFIGURATION
OUT
4
1
IN
Bottom View
GND
EN
3
2
GND
Fig. 2 - TDFN4 1.2 mm x 1.6 mm Package
PIN DESCRIPTION
Pin Number
Name
Function
1
IN
This is the input pin of the switch
2
GND
Ground connection
3
EN
Enable input
4
OUT
This is the output pin of the switch
S15-1920-Rev. C, 24-Aug-15
Document Number: 62959
3
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
SiP32448, SiP32449
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BLOCK DIAGRAM
VIN
Negative
Voltage
Detect / Clamp
EN
Control
Logic
Charge
Pump
Turn-on
Slew Rate
Control
SiP32449 only
Output
Discharge
GND
SiP32448, SiP32449
Fig. 3 - Functional Block Diagram
DETAILED DESCRIPTION
SiP32448 and SiP32449 are advanced slew rate controlled
high side load switches with an integrated N-channel power
switch. When the device is enabled the gate of the power
switch is turned on at a controlled rate to avoid excessive
inrush current. Once fully on the gate to source voltage of
the power switch is biased at a constant level. The design
gives a flat on resistance throughout the operating voltages.
A special reverse blocking circuitry prevents current flowing
from output to input when the switch is off. The VIN and EN
pin can tolerate -2 V voltage without drawing excessive
current.
APPLICATION INFORMATION
Input Capacitor
In general, under steady state conditions the SiP32448 and
SiP32449 do not require an input capacitor. Nevertheless,
an input bypass capacitor is recommended in order to
reduce the input voltage drop caused by transient inrush
currents. Commonly, a 2.2 μF ceramic capacitor is sufficient
and should be placed in close proximity to VIN and GND
pins. A higher value input capacitor can help to further
reduce the voltage drop. Ceramic capacitors are
recommended for their low ESR characteristic.
Output Capacitor
While these devices work without an output capacitor, a
1 μF or higher value capacitor across VOUT and GND is
recommended in order to handle potential load transient
conditions. In the event that the switch is turning of while
running high current, circuit stray inductances might force
the output to some negative voltage in order to mitigate this
phenomenon a proper output capacitor is required.
Enable
The device is logic high active. Enable pin voltage can
exceed VIN as long as it is within the absolute maximum
rating range. The EN pin is compatible with both TTL and
CMOS logic voltage levels. The part features a constant
S15-1920-Rev. C, 24-Aug-15
control logic threshold over the operation voltage range.
When enable pin is left open, a built-in voltage divider sets
the internal logic. The switch will turn on when the VIN
exceeds the UVLO trip point.
Reverse Voltage Protection
The SiP32448 and SiP32449 contain a reverse blocking
circuitry to protect the current from going to the input from
the output when the switch is off. Reverse blocking works
for input voltage as low as 0 V.
In case the EN pin is left open, the reverse blocking circuitry
will prevents current flow from output pin to input pin if the
output voltage is higher by at least 1 V than the input
voltage.
THERMAL CONSIDERATIONS
The maximum allowed DC Current depends on the thermal
condition in which the device operates. In order to calculate
max allowed DC current, first the max power dissipation
should be considered.
The SiP32448 and SiP32449 are packaged in a TDFN4
1.2 mm x 1.6 mm package which has a thermal resistance of
J-Aa = 170 °C/W.
Note
a. Device mounted with all leads and power pad soldered or
welded to PC board, see PCB layout. For any other layout
configuration the actual junction to ambient thermal impedance
should be considered
The following formula shows the maximum allowed power
dissipation as a function of the ambient temperature TA
when the maximum junction temperature is limited to
TJ (max.) = 125 °C:
Pmax. =
TJ (max.) - TA
θJ-A
=
125 - TA
170
For example at ambient temperature of 70 °C, the maximum
power dissipation will be limited to about 324 mW.
Document Number: 62959
4
For technical questions, contact: [email protected]
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SiP32448, SiP32449
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Vishay Siliconix
In order to calculate the maximum allowed DC current the
switch RDS(on) temperature dependency should be
considered.
As an example let us calculate maximum load current
at TA = 70 °C and input voltage of 1.8 V. At this input voltage
the RDS(on) at 25 °C 43 m (see specification table). The
RDS(on) at 125 °C can be extrapolated from this data using
the following formula:
RDS(on)_125 °C = RDS(on)_25 °C x (1 + TC x (TJ max. - 25)/100 )
Where TC is the RDS(on) temperature coefficient expressed in
percent change per degree C.
For SiP32448 the approximated value is 0.31 %/°C. TJ max.
is the maximum allowed junction temperature (125 °C).
Negative Input Voltage
The SiP32448 and SiP32449 can withstand maximum
negative 2 V at its input due to any spike from abnormal or
fault condition of the system.
Recommended Board Layout
For improved performance, all traces should be as short as
possible to minimize stray inductances and parasitic effects.
The input and output capacitors should be kept as close
as possible to the input and output pins respectively.
Connecting the central exposed pad to GND, using wide
traces for input, output, and GND help reducing the case to
ambient thermal impedance. See fig. 4.
BOARD LAYOUT
Therefore,
RDS(on) (at 125 °C) =
43 mΩ x (1 + 0.31 x (125 - 25)/100 ) ≈ 57 mΩ
The maximum current limit is then determined by
I LOAD (max.) <
P (max.)
R DS(on)
Which in this case is 2.38 A.

Due to device limitation the max switch DC current
should exceed 3 A in any condition.
To obtain the highest power dissipation the power pad of
the device should be connected to a heat sink on the printed
circuit board. Figure 4 shows a typical PCB layout. All
copper traces and vias for the VIN and VOUT pins should be
sized adequately to carry the maximum continuous current.
Fig. 4 - Recommended Board Layout
TYPICAL APPLICATION SCHEMATIC
Fig. 5 - Application Schematic
S15-1920-Rev. C, 24-Aug-15
Document Number: 62959
5
For technical questions, contact: [email protected]
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SiP32448, SiP32449
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Vishay Siliconix
TYPICAL ENABLE POWER ON AND OFF WAVEFORMS
Typical Turn-On Delay, Rise Time,
COUT = 1 μF, CIN = 2.2 μF, IOUT = 3 A
Typical Turn-Off Delay, Fall Time,
COUT = 1 μF, CIN = 2.2 μF, IOUT = 3 A
Typical Turn-On Delay, Rise Time,
COUT = 1 μF, CIN = 2.2 μF, ROUT = 10 
Typical Turn-Off Delay, Fall Time,
COUT = 1 μF, CIN = 2.2 μF, ROUT = 10 
S15-1920-Rev. C, 24-Aug-15
Document Number: 62959
6
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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Vishay Siliconix
TYPICAL CHARACTERISTICS (internally regulated, 25 °C, unless otherwise noted)
160
140
140
120
IQ - Quiescent Current (μA)
IQ - Quiescent Current (μA)
120
100
80
60
40
VIN = 5 V
100
80
VIN = 3.6 V
60
40
VIN = 1.8 V
20
20
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
- 40
5.5
- 20
0
VIN (V)
9.0
80
100
10
8.5
9
8.0
IIQ(OFF) - Off Supply Current (μA)
IQ(OFF) - Off Supply Current (μA)
60
Fig. 9 - Quiescent Current vs. Temperature
Fig. 6 - Quiescent Current vs. Input Voltage
7.5
7.0
6.5
6.0
5.5
5.0
8
VIN = 5 V
7
VIN = 3.6 V
6
5
VIN = 1.8 V
4
3
4.5
4.0
1.5
2
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
- 40
- 20
0
20
40
60
80
100
Temperature (°C)
VIN (V)
Fig. 10 - Off Supply Current vs. Temperature
Fig. 7 - Off Supply Current vs. Input Voltage
-0.3
20
-0.35
0
IDS(off) - Off Switch Current (nA)
IDS(off) - Off Switch Current (nA)
20
40
Temperature (°C)
-0.4
-0.45
-0.5
-0.55
-0.6
-0.65
-20
-40
VIN = 1.2 V
-60
VIN = 3.6 V
-80
-100
VIN = 5 V
-120
-140
-0.7
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-160
- 40
- 20
0
20
40
60
80
100
VIN (V)
Temperature (°C)
Fig. 8 - Off Switch Current vs. Input Voltage
Fig. 11 - Off Switch Current vs. Temperature
S15-1920-Rev. C, 24-Aug-15
Document Number: 62959
7
For technical questions, contact: [email protected]
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TYPICAL CHARACTERISTICS (internally regulated, 25 °C, unless otherwise noted)
42.0
50
41.5
48
46
40.5
RDS - On-Resistance (mΩ)
RDS - On-Resistance (mΩ)
41.0
IO = 0.5 A
VIN = 5 V
IO = 2.0 A
40.0
IO = 1.2 A
39.5
39.0
38.5
IO = 0.5 A
38.0
44
42
40
38
36
34
37.5
32
37.0
30
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
- 40
- 20
0
Fig. 12 - On-Resistance vs. Input Voltage
60
80
100
230
SiP32449 only
VOUT = VIN
350
RPD - Output Pulldown Resistance (Ω)
RPD - Output Pulldown Resistance (Ω)
40
Fig. 15 - On-Resistance vs. Temperature
400
300
250
200
150
100
50
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
SiP32449 only
VOUT = VIN = 5 V
225
220
215
210
205
200
195
190
- 40
5.5
- 20
0
20
40
60
80
100
VIN (V)
Temperature (°C)
Fig. 13 - Output Pulldown Resistance vs. VIN
Fig. 16 - Output Pulldown Resistance vs. Temperature
1.20
2.4
1.15
VIN = 5 V
CL = 0.1 μF
RL = 10 Ω
2.3
1.10
2.2
1.05
1.00
tr - Rise Time (ms)
EN Threshold Voltage (V)
20
Temperature (°C)
VIN (V)
VIH
0.95
0.90
0.85
VIL
0.80
2.1
2.0
1.9
1.8
1.7
0.75
1.6
0.70
1.5
0.65
0.60
1.5
1.4
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
Fig. 14 - Threshold Voltage vs. Input Voltage
S15-1920-Rev. C, 24-Aug-15
- 40
- 20
0
20
40
Temperature (°C)
60
80
100
Fig. 17 - Rise Time vs. Temperature
Document Number: 62959
8
For technical questions, contact: [email protected]
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TYPICAL CHARACTERISTICS (internally regulated, 25 °C, unless otherwise noted)
1.2
4.0
VIN = 5 V
CL = 0.1 μF
RL = 10 Ω
VIN = 5 V
CL = 0.1 μF
RL = 10 Ω
3.5
td(off) - Turn-Off Delay Time (μs)
td(on) - Turn-On Delay Time (ms)
1.2
1.1
1.1
1.0
1.0
0.9
3.0
2.5
2.0
1.5
1.0
0.5
0.9
0.0
0.8
- 40
- 20
0
20
40
60
Temperature (°C)
80
- 40
100
Fig. 18 - Turn-On Delay Time vs. Temperature
- 20
0
20
40
Temperature (°C)
60
80
100
Fig. 20 - Turn-Off Delay Time vs. Temperature
2
0.0
0
-2
IVIN - Input Current (mA)
IIN - Input Current (nA)
-0.5
-1.0
VIN = 0 V
-1.5
-2.0
-4
-6
-8
-10
-12
-14
-2.5
-16
-3.0
0.5
-18
1.0
1.5
2.0
2.5
3.0
3.5
VOUT (V)
4.0
4.5
5.0
Fig. 19 - Reverse Blocking Current
5.5
-2.0 -1.8 -1.6 -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0
VIN (V)
Fig. 21 - Negative Input Voltage Tolerance




















Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see www.vishay.com/ppg?62959.
S15-1920-Rev. C, 24-Aug-15
Document Number: 62959
9
For technical questions, contact: [email protected]
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Package Information
www.vishay.com
Vishay Siliconix
TDFN4 1.2 x 1.6 Case Outline
D
4
D2
b
3
Pin #1 ID
(Optional)
4
K
E
E2
3
1
2
e
Index Area
(D/2 x E/2)
Bottom View
A
A1
Top View
A3
1
L
2
Side View
MILLIMETERS
INCHES
DIM.
MIN.
NOM.
MAX.
MIN.
NOM.
MAX.
A
0.50
0.55
0.60
0.020
0.022
0.024
A1
0.00
-
0.05
0.00
-
0.002
A3
0.15 REF.
0.006
b
0.20
0.25
0.30
0.008
0.010
0.012
D
1.15
1.20
1.25
0.045
0.047
0.049
D2
0.81
0.86
0.91
0.032
0.034
0.036
e
0.50 BSC
0.020
E
1.55
1.60
1.65
0.061
0.063
0.065
E2
0.45
0.50
0.55
0.018
0.020
0.022
0.35
0.010
K
L
0.25 TYP.
0.25
0.30
0.010 TYP.
0.012
0.014
ECN: S11-2099-Rev. B, 07-Nov-11
DWG: 5995
Revision: 07-Nov-11
1
Document Number: 65734
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
PAD Pattern
Vishay Siliconix
RECOMMENDED MINIMUM PADS FOR TDFN4 1.2 x 1.6
0.86
0.50
3
1
2
2.0
0.55
0.20
0.50
0.20
4
0.55
0.30
Recommended Minimum Pads
Dimensions in mm
Document Number: 66558
Revision: 05-Mar-10
www.vishay.com
1
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Vishay
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all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
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requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
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Revision: 02-Oct-12
1
Document Number: 91000