S-8821 Series
www.sii-ic.com
VOLTAGE REGULATION
STEP-UP CHARGE PUMP DC-DC CONVERTER
© Seiko Instruments Inc., 2002-2010 Rev.5.0_00
Seiko Instruments In c. 1
The S-8821 series is a CMOS step-up charge pum p DC-DC conv erter with a voltage regulation function.
The S-8821 series consists of an oscillation circuit, a controller, a reference voltage circuit, an error amplifier
circuit, and an output switching transistor, and can regulate the output voltage by PFM control.
Since small ceramic capacitors can be used for the pump capacitor, input capacitor, and output capacitor, the
mounting area can be minimized.
Features
• Step-up PFM control CMOS charge pump
• Power supply voltage: 1.6 to 5.0 V
• Output voltage: 2.5 to 5.5 V, selectable in 0. 1 V steps.
• Output voltage accuracy: ±2 % max.
• Built-in soft start circuit: 1.0 ms typ.
• Output current 25 mA (VIN=(VOUT(S) × 0.80) V)
• Oscillation frequency: 1.0 MHz typ.
• ON/OFF function: During standby: 1 μA max.
• Lead-free, Sn 100%, halogen-fre e*1
*1. Refer to “ Product Name Structure” for details.
Applications
• Lithium ion battery driven applications
• Local power supply
• Power supply for white LED displ ay backlights
Packages
• SOT-23-6W
• SNT-8A
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 2
Block Diagram
VIN
Switch
control
circuit
SW1
SW
2
SW
3
SW
4
C
+
C
−
CPUMP=0.10 μ
F
Soft start
circuit ON/OFF
circuit
ON/OFF
PFM control
oscillator
circuit
(1.0 MHz)
Reference
voltage
+
-
VOUT
GND
COUT=10 μF
Rs
Rf
CIN=4.7 μ
F
Figure 1
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments In c. 3
Product Name Structure
• The output voltage and packages for the S-8821 Series can be selected at the user ’s request. Refer to
the “Product name” for the meanings of the characters in the product name, “Package” regarding the
package drawing s an d “Product name list” for the full product names.
1. Product name
(1) SOT-23-6W
S-8821 xx A MH − xxx TF x
Output voltage
25 to 55
(E.g., when the output voltage is 2.5 V, it is
expressed as 25.)
IC direction in ta
p
e s
p
ecifications*1
Package name (abbrevi ation)
MH: SOT-23-6W
Environm ental co de
S: Lead-free, haloge n-free
G: Lead-free (fo r details, please contact our sales office)
Product name (abbreviation)*2
*1. Refer to the tape spe cifications at the end of this book.
*2. Refer to the product name list.
(2) SNT-8A
S-8821 xx A PH − xxx TF U
Output voltage
25 to 55
(E.g., when the output voltage is 2.5 V, it is
expressed as 25.)
IC direction in tape speci fication s*1
Package name (abbrevi ation)
PH: SNT-8A
Environm ental co de
U: Lead-free (Sn 100%), halogen-free
Product name (abbreviation)*2
*1. Refer to the tape spe cifications at the end of this book.
*2. Refer to the product name list.
2. Package
Drawing Code
Package Name Package Tape Reel Land
SOT-23-6W MP006-B-P-SD MP006-B-C-SD MP006-B-R-SD ⎯
SNT-8A PH008-A-P-SD PH008-A-C-SD PH008-A-R-SD PH008-A-L-SD
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 4
3. Product name list
Table 1
Output Voltage SOT-23-6W SNT-8A
2.5 V S-882125AMH-M2ATFz S-882125APH-M2ATFU
3.0 V S-882130AMH-M2FTFz ⎯
3.3 V S-882133AMH-M2ITFz ⎯
3.5 V S-882135AMH-M2KTFz ⎯
3.6 V S-882136AMH-M2LTFz ⎯
4.0 V S-882140AMH-M2PTFz ⎯
4.5 V S-882145AMH-M2UT Fz ⎯
5.0 V S-882150AMH-M2ZTF z S-882150APH-M2ZTF U
5.2 V S-882152AMH-M3BTFz ⎯
5.5 V S-882155AMH-M3ETFz ⎯
Remark 1. Contact the SII sales department for pro ducts with an output voltage other than those
specified above.
2. z: G or S
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments In c. 5
Pin Configurations
Table 2
Pin No. Symbol Pin Description
1 VIN Voltage input pin
2 C+ Charge-pump pump capacitor connection pin
(positive pin)
3 C− Charge-pump pump capacitor connection pin
(negative pin)
4 ON/OFF
Shutdown pin
High level (H) : normal operation (step-up)
Low level (L) : step-up halt (all circuit halt)
5 GND GND pin
6 VOUT Voltage output pin
6 4
1 3 2
SOT-23-6W
Top view
5
Figure 2
Table 3
Pin No. Symbol Pin Description
1 C+ Charge-pump pump capacitor connection pin
(positive pin)
2 VIN Voltage input pin
3 NC*1 No connection
4 VOUT Voltage output pin
5 ON/OFF
Shutdown pin
High level (H) : normal operation (step-up)
Low level (L) : step-up halt (all circuit halt)
6 GND GND pin
7 NC*1 No connection
8 C− Charge-pump pump capacitor connection pin
(negative pin)
1
2
3
4
SNT-8A
Top view
8
7
6
5
Figure 3
*1. The NC p in is electrically open.
The NC pin can be connected to VIN or GND.
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 6
Absolute Maximum Ratings
Table 4
(Ta=25°C unless otherwise specified)
Items Symbols Absolute Maximum Ratings Units
C+ pin voltage VC+ V
GND−0.3 to VGND+7.5 V
C− pin voltage VC− V
GND−0.3 to VGND+7 V
VIN pin voltage VIN VGND−0.3 to VGND+5.5 V
VOUT pin vol tage VOUT VGND−0.3 to VGND+7 V
ON/OFF pin voltage VON/OFF VGND−0.3 to VIN+0.3 V
300 (When not mounted on board) mW
SOT-23-6W
650*1 mW
Power dissipation
SNT-8A
PD 450*1 mW
Operating ambient temperature Topr −40 to +85 °C
Storage temperature Tstg −40 to +125 °C
*1. When mounted on board
[Mounted board]
(1) Board size: 114.3 mm × 76.2 mm × t1.6 mm
(2) Board name: JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding w hich the product could suffer
physical damage. These values must therefore not be exc eeded under any conditions.
(1) When mounted on board (2) When not mounted on board
0 50 100 150
600
400
200
0
Power Dissipation P
D
(mW)
Ambient Temperature Ta (°C)
500
300
100
700
800
SOT-23-6W
SNT-8A
050 100 150
300
200
100
0
Power Dissipation P
D
(mW)
Ambient Temperature Ta (°C)
250
150
50
350
400
Figure 4 Power Dissipation of Package
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments In c. 7
Electrical Characteristics
Table 5
(VIN=(VOUT(S) × 0.60) V*1, Ta=25°C unless otherwise specified)
Items Symbols Conditions Min. Typ. Max. Units
Test
circuits
VOUT(S) ≤ 2.9 V 1.6 ⎯ 5.0 V 2
Operation input voltage VIN VOUT(S) > 2.9 V VOUT(S) ×
0.54 ⎯ 5.0 V 2
Output volt age*2 V
OUT(E) IOUT=10 mA VOUT(S) ×
0.98 VOUT(S) VOUT(S) ×
1.02 V 2
VIN=(VOUT(S) × 0.54) V*6 5 ⎯ ⎯ mA 2
VIN=(VOUT(S) × 0.60) V*1 15 ⎯ ⎯ mA 2
Output current*3 I
OUT VIN=(VOUT(S) × 0.80) V 25 ⎯ ⎯ mA 2
Line regulation ΔVOUT1 VIN=(VOUT(S) × 0.60) V*1
to (VOUT(S) − 0.10) V,
IOUT=10 mA ⎯ 50 100 mV 2
Load regulation ΔVOUT2 IOUT=0.1 mA to 10 mA ⎯ 40 80 mV 2
Ripple voltage*4 V
RIP IOUT=10 mA ⎯ 70 ⎯ mVp−p 2
Maximum oscillation
frequency fosc VOUT=(VOUT(S) × 0.60) V,
Measure waveform at C− pin 800 1000 1200 kHz 2
Efficiency*5 η VIN=(VOUT(S) × 0.54) V,
VOUT(S) ≥ 3.0 V, IOUT=5 mA ⎯ 90 ⎯ % 1
Operation consumption
current ISS1 VIN=VOUT(S),
VOUT=(VOUT(S) + 0.5) V ⎯ 35 60 μA 2
Standby consumption
current ISSS VIN=(VOUT(S) × 0.54) V*6 to 5.0 V,
VON/OFF=0 V ⎯ 0.3 1.0 μA 1
ON/OFF pin input
voltage (high level) VSH VIN=(VOUT(S) × 0.54) V*6 to 5.0 V 1.5 ⎯ ⎯ V 1
ON/OFF pin input
voltage (low level) VSL VIN=(VOUT(S) × 0.54) V*6 to 5.0 V ⎯ ⎯ 0.3 V 1
ON/OFF pin input
current (high level) ISH VIN=(VOUT(S) × 0.54) V*6 to 5.0 V −0.1 ⎯ 0.1 μA 1
ON/OFF pin input
current (low level) ISL VIN=(VOUT(S) × 0.54) V*6 to 5.0 V −0.1 ⎯ 0.1 μA 1
Soft start time tSS IOUT=10 mA 0.2 1.0 4.0 ms 1
*1. In case of VOUT ≤ 3.3 V, VIN=2.0 V
*2. V
OUT(E): Actual output voltage
VOUT(S): Specified output voltage
*3. The output current at which the output voltage becomes 97 % of VOUT(E) after gradually increasing the
output current.
*4. Design assurance
*5. The ideal efficiency is indicated by the following expression.
Efficiency (η)=(VOUT × IOUT) / (2.0 × VIN × IOUT)
*6. In case of VOUT ≤ 2.9 V, VIN=1.6 V
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 8
Test Circuits
1.
VOUT
GND
ON/OFF
C−
C+
VIN
AA
AA A
4.7 μF
Figure 5
2.
VOUT
GND
ON/OFF
C−
C+
VIN
AA
4.7 μF
0.1 μF
10 μF
Figure 6
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments In c. 9
Operation
1. Basic operation
Figure 7 shows the block diagram of the S-8821 Series.
The S-8821 series controls the output voltage by using the pulse frequency modulation (PFM) method.
The SW1 to SW4 switching transistors are switched ON/OFF with the clock generated by the internal
oscillator circuit, and operates the step-up charge pump.
The output voltage is fed b ack and the voltage split by feedba ck resistances Rs and Rf and reference
voltage (Vref) are compared by a comparator. This comparator signal is used to modulate the oscillation
pulse frequency in order to keep the output voltage constant.
VIN
Switch
control
circuit
SW1
SW
2
SW
3
SW
4
C
+
C
−
CPUMP=0.10 μ
F
Soft start
circuit ON/OFF
circuit
ON/OFF
PFM co ntr ol
oscillator
circuit
(
1.0 MHz
)
Reference
voltage
+
-
VOUT
GND
COUT=10 μF
Rs
Rf
CIN=4.7 μ
F
Figure 7
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 10
2. Step-up Charge Pump
The step-up charge pump steps up the voltage by switching ON/OFF of the SW1 to SW4 switching
transistors.
First, in order to charge the pump capa citance (CPUMP), set SW1 to OFF, SW2 to ON, SW3 to OFF, and
SW4 to ON (charge cycle). Following charging the electricity, in order to discharge the charged
electricity to the output capacitance (COUT), SW1 set the switches as to ON, SW2 to OFF, SW3 to ON,
and SW4 to OFF (dischar ge cycle).
The input voltage can be stepped up to a constant voltage value by repeating this charge cycle and
discharge cycle.
Figure 8 shows the charge cycle, and Figure 9 sh ows the discharge cycle.
VIN
SW1: OFF
SW3: OF FSW4: ON
SW2: ON
COUT
10 μF
CPUMP
0.10 μF
Current flo
w
Figure 8
VIN
SW1: ON
SW3: ONSW4: OFF
SW2: OFF
COUT
10 μF
CPUMP
0.10 μFC urrent flow
Figure 9
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments In c. 11
3. Shut down Pin (ON/OFF Pin)
Setting the ON/OFF pin to the Low level ("L") causes the voltage of the VOUT pin to change to the GND
level and simultane ously the operation of all the internal circuit to stop. At this time, the consumption
current is largely reduced, to a level of approximately 0.3 μA.
The structure of the ON/OFF pin is as shown in Figure 10. Since the ON/OFF pin is neith er pulled
down nor pulled up internally, do not use it in the floating state.
When the ON/OFF pin is not used, connect it to the VIN pin.
Table 6
ON/OFF pin Internal circuit VOUT pin volt age
“H”: Power on Operating Set value
“L”: Power of f Stop VGND level
GND
ON/OFF
VIN
VIN
Figure 10
4. Sof t Start Function
The S-8821 Series features a built-in soft start circuit. Upon power application or when the OFFON/ pin
is switched from "L" to "H", the output voltage graduall y rises over the soft start time, and the output
current is gradually output as a result. This soft start function reduces the input current rush.
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 12
External Capacitor Selection
1. Input and Output Capacitors (CIN, COUT)
The input capacitor (CIN) lo wers the power supply impedance a nd averages the input current.
The CIN value is selected according to the impedance of the power supply that is used. Select a ceramic
capacitor with a small equivalent series resistance (ESR). Although this figure varies according to the
impedance of the power supply that is used as well as the load current value, it is generally in the range
of 4.7 μF to 10 μF.
For the output cap acitor (COUT), select a ceramic capacitor with a small ESR for smoothing the ripple
voltage. A value of 10 μF is recommended for the capacitance valu e. Use of a capacitor with a
capa citance lower than 10 μF results in a larger ripple voltage. Conversely, use of a capacitor with a
capacitance greater than 10 μF results in the output voltage not being able to rise up to setting value
and the impossibility to obt ain the desired output current.
2. Pump Capacitor (CPUMP)
The pump cap acitor (CPUMP) is required for stepping up the voltage. Select a ceramic capacitor with a
small ESR. A capacitance value of 0.10 μF is recommended. Use of a ca pacitor with a capacitance
greater than 0.10 μF results in a larger ripple voltage. Conversely, use of a capacitor with a capacitance
lower than 0.10 μF results in the output voltage not being able to raise up to set t ing value and the
impossibility to obtain the desired output current.
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments Inc. 13
Precautions
• Regarding the wiring to the VIN pin, VOUT pin, C+ pin, C− pin and GND pin, be careful to perform
pattern wiri ng so as to obta i n low impedance.
• Always connect a cap acitor to the VOUT pin, C+ pi n, and C− pin.
• Connect CIN and COUT in the vicinity of the IC and suf f iciently strengthen the wi ring for GND pin and VIN
pin in order to lower the impedance of the wirin g resistance, etc. High imped ance may cause unstable
operation.
Moreover, in selecting CIN and COUT, perform a full evaluation of the actual usage conditions.
• Connect CPUMP in the vicinity of the IC and sufficiently strengthen the wiring for the C+ pin and C− pin in
order to lower the impedance of the wiring resistance, etc. High impedance may cause instabl e
operation.
Moreover, in selecting CPUMP, perform a full evaluation of the actual usage conditions.
• The ON/OFF pin is configured as shown in Figure 9 and is neither pulled up o r down intern ally, so do not
use this pin in a floating state. When not using the ON/OFF pin, connect it to the VIN pin.
Moreover, please do not apply volt age higher than VIN + 0.3 V to an ON/OFF pin. Current flows for a
VIN pin through the protection diod e inside IC.
• Since this IC consists of double step-up circuits, it cannot set more than twice voltage of VIN to VOUT(S).
• Be careful about the usage conditions for the input/output voltages and output current to make sure that
dissipation within the IC does not exceed the allowable power dissipation of the package.
For reference, the calculation of the power co nsumption in this IC is shown below.
PD=(VIN × 2.0 − VOUT) × (IOUT)
Reference: VIN=4.2 V, VOUT=5.5 V, IOUT=10 mA
P
D=(4.2 × 2.0 − 5.5) × 0.010=29 mW
• Since the information described herein is subject to change without notice, confirm that this is the latest
one before using.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
• SII claims no responsibility for any and all disputes a rising out of or in connectio n with any infringe ment
of the product s including this IC upon patents owned by a third p arty.
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 14
Characteristics (Typical Data)
(1) Output voltage vs. Operation input voltage
S-882133A S-882150A
IOUT=10 mA, Ta=25°C IOUT=10 mA, Ta=25°C
VOUT [V]
1.5
2.0
2.5
3.0
3.5 5.5
3.15
3.10
3.50
3.20
3.25
3.35
3.30
3.40
3.45
4.0
4.5
5.0
VOUT [V]
1.5 2.5 3.0 3.5
5.5
4.80
4.70
5.30
5.20
5.10
5.00
4.90
2.0 4.0
4.5
5.0
VIN [V] VIN [V]
(2) Output voltage vs. Output current
S-882133A S-882150A
VIN=2.0 V, Ta=25°C VIN=3.0 V, Ta=25°C
VOUT [V]
0
5
10
20
30
3.15
3.10
3.50
3.40
3.35
3.30
3.25
3.20
25
15
3.45
VOUT [V]
010 15
20
30
4.70
5.30
5.20
5.10
5.00
4.90
4.80
525
IOUT [mA] IOUT [mA]
(3) Operation consumption vs. Operation input voltage
S-882133A S-882150A
Ta=25°C Ta=25°C
ISS1 [μA]
1.5 3.5 4.0 5.5
15
10
50
40
35
30
25
20
5.0 4.5
45
2.0 2.5 3.0
ISS1 [μA]
1.5 2.5 5.5
10
50
35
30
20
3.5
40
25
45
15
3.0 4.0
2.0 4.5
5.0
VIN [V] VIN [V]
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
Rev.5.0_00 S-8821 Series
Seiko Instruments Inc. 15
(4) Ripple voltage vs. Operation input voltage
S-882133A S-882150A
IOUT=10 mA, Ta=25°C IOUT=10 mA, Ta=25°C
VRIP [mVp-p]
1.5
3.0
3.5 4.0
5.0
5.5
0
20
40
60
100
4.5
2.0
2.5
80
VRIP [mVp-p]
1.5 2.5 3.0 3.5
5.0 5.5
20
0
40
60
100
4.5
80
4.0
2.0
VIN [V] VIN [V]
(5) Efficiency*1 vs. Operation input voltage
S-882133A S-882150A
IOUT=10 mA, Ta=25°C IOUT=10 mA, Ta=25°C
η [%]
1.5
2.0
3.5 4.5
5.5
20
40
60
80
100
4.0
5.0
3.0
2.5
η [%]
1.5 2.5 3.5 5.5
20
40
60
80
100
4.0 3.0 4.5 5.02.0
VIN [V] VIN [V]
*1. The ideal efficiency is indicated by the following expression.
Efficiency (η)=(VOUT × IOUT) / (2.0 × VIN × IOUT)
(6) Maximum oscillation frequency vs. Operation input voltage
S-882133A S-882150A
Ta=25°C Ta=25°C
fOSC [kHz]
1.5 2.0 2.5 3.5 5.0 5.5
700
800
900
1000
1100
1200
1300
4.0 4.5 3.0
fOSC [kHz]
1.5 2.0 2.5 4.0 5.0 5.5
700
800
900
1000
1100
1200
1300
4.5
3.5 3.0
VIN [V] VIN [V]
VOLTAGE REGULATION STEP-UP CHARGE PUMP DC-DC CONVERTER
S-8821 Series Rev.5.0_00
Seiko Instruments In c. 16
(7) Load fluctuation
S-882133A S-882150A
VIN=2.0 V VIN=3.0 V
CH1
CH2
1 mA
10 mA
CH1
CH2
1 mA
10 mA
[1 ms/div.] [1 ms/div.]
CH1: VOUT [20 mV/div.]
CH2: IOUT [2 mA/div.] CH1: VOUT [20 mV/div.]
CH2: IOUT [2 mA/div.]
(8) Input voltage fluctuation
S-882133A S-882150A
IOUT=10 mA IOUT=10 mA
CH1
CH2
1.8 V
3.3 V
CH1
CH2 3.0 V
5.0 V
[1 ms/div.] [1 ms/div.]
CH1: VOUT [20 mV/div.]
CH2: VIN [1 V/div.]
CH1: VOUT [20 mV/div.]
CH2: VIN [1 V/div.]
2.9±0.2
0.15
1.9±0.2
123
4
6
No.
TITLE
SCALE
UNIT mm
5
0.4
0.95
+0.1
-0.08
0.95
+0.1
-0.05
No. MP006-B-P-SD-1.0
SOT236-B-PKG Dimensions
MP006-B-P-SD-1.0
Seiko Instruments Inc.
mm
No. MP006-B-C-SD-1.0
SOT236-B-Carrier Tape
MP006-B-C-SD-1.0
Seiko Instruments Inc.
123
45
6
ø1.5 +0.1
-0 2.0±0.05
ø1.0 +0.2
-0 4.0±0.1
1.4±0.2
0.25±0.1
3.2±0.2
Feed direction
4.0±0.1(10 pitches:40.0±0.2)
No.
TITLE
SCALE
UNIT
mm
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
QTY 3,000
SOT236-B-Reel
MP006-B-R-SD-1.0
Seiko Instruments Inc.
No. MP006-B-R-SD-1.0
Enlarged drawing in the central part
No.
TITLE
SCALE
UNIT
1.97±0.03
0.2±0.05
0.48±0.02
0.08
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
SNT-8A-A-PKG Dimensions
PH008-A-P-SD-2.0
No. PH008-A-P-SD-2.0
0.5
+0.05
-0.02
123 4
56
78
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
PH008-A-C-SD-1.0
SNT-8A-A-Carrier Tape
No. PH008-A-C-SD-1.0
Feed direction
4.0±0.1
2.0±0.05
4.0±0.1
ø1.5 +0.1
-0
ø0.5±0.1
2.25±0.05
0.65±0.05
0.25±0.05
2134
7865
5°
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
Enlarged drawing in the central part
QTY.
PH008-A-R-SD-1.0
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
SNT-8A-A-Reel
No. PH008-A-R-SD-1.0
5,000
No.
TITLE
SCALE
UNIT mm
SNT-8A-A-Land Recommendation
Seiko Instruments Inc.
PH008-A-L-SD-3.0
0.3
0.20.3
0.20.3
0.52
2.01
0.52
No. PH008-A-L-SD-3.0
0.3 0.2
Caution Making the wire pattern under the package is possible. However, note that the package
may be upraised due to the thickness made by the silk screen printing and of a solder
resist on the pattern because this package does not have the standoff.
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