ROHM BU2098F, BU2090F, BU2090FS Technical data
090FS
Serial-in / Parallel-out Driver Series
Serial / Parallel
2-input Drivers
BU2098F, BU2090F, BU2090FS
No.11051EBT04
●Description
Serial-in-parallel-out driver is a open drain output driver. It incorporates a built-in shift register and a latch circuit to turn on a
maximum of 12 LED by a 2-line interface, linked to a microcontroller.
A open drain output provides maximum of 25mA current.
●Features
1) LED can be driven directly. (Output current 25mA)
2) 8/12 Bit parallel output
3) This product can be operated on low voltage.
4) Compatible with I
2
C BUS. (BU2098)
●Use
For AV equipment such as, audio stereo sets, videos and TV sets, PCs, control microcontroller mounted equipment.
●Line up
Parameter BU2098F BU2090F BU2090FS Unit
Output current 25 25 mA
Output line 8 12 lines
Package SOP16 SOP16 SSOP-A16 －
●Thermal derating curve
700
600
500
400
300
200
Power dissipation Pd [mW]
100
0
25 50
85℃
75 100
BU2098F
125 150
175
700
600
BU2
BU2090F
125 150
175
500
400
300
200
Power dissipation Pd [mW]
100
0
25 50
75 100
Ambient temperature Ta [℃]
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© 2011 ROHM Co., Ltd. All rights reserved.
1/12
2011.12 - Rev.B
BU2098F, BU2090F, BU2090FS
●Electrical characteristics
BU2098F (unless otherwise noted, VDD=5V, Vss=0V, Ta=25℃)
Parameter Symbol Min. Typ. Max. Unit Condition
Input High-level voltage VIH 0.7×VDD - - V
Technical Note
Input Low-level voltage VIL - - 0.3×VDD V
Output Low-level voltage VOL - - 0.4 V IOUT=10mA
Input Low-level current IIL - 2.0 μA VIN=0
Input High-level current IIH - - -2.0 μA VIN=VDD
Output leakage current IOZ - - ±5.0 μA
Static dissipation current IDD - - 2.0 μA
Output=High impedance
OUT=VDD
V
BU2090F/BU2090FS (unless otherwise noted, V
DD=5V, VSS=0V, Ta=25℃)
Parameter Symbol Min. Typ. Max. Unit Condition
Input High-level voltage VIH
Input Low-level voltage VIL
Output Low-level voltage VOL
3.5 - - V V
2.5 - - V VDD=3V
- - 1.5 V V
- - 0.4 V VDD=3V
- - 2.0 V V
- - 1.0 V VDD=3V,IOL=5mA
DD=5V
DD=5V
DD=5V,IOL=20mA
“H” output disable current IOZH - - 10 μA VO=25V
“L” output disable current IOZL - -5.0 μA VO=0V
Static dissipation current IDD
- - 5.0 μA VDD=5V
3.0 μA VDD=3V
●Operating conditions (Ta=25℃, VSS=0V)
Parameter Symbol
BU2098F BU2090F/BU2090FS
Limits
Unit
Power Supply Voltage VDD +2.7 to 5.5 V
Output Voltage Vo 0 to +15 0 to +25 V
●Absolute maximum ratings
BU2098F, BU2090F,BU2090FS
Parameter Symbol
BU2098F BU2090F BU2090FS
Limits
Unit
Power supply voltage VDD -0.5 to +7.0 -0.3 to +7.0V V
Power dissipation1 Pd1 300 *1 300 *1 500 *2
Power dissipation2 Pd2 - 500 *3 650 *4
mW
Operating temperature range Topr -40 to +85 ℃
Storage temperature range Tstg -55 to +125 ℃
Output voltage Vo VSS to +18.0 VSS-0.3 to +25V V
Input voltage VIN -0.5 to VDD+0.5 VSS-0.3 to VDD+0.3V V
Allowable loss of single unit
* Reduced by 3mW/℃ over 25℃. (BU2098F)
1
*
Reduced by 3mW/℃ over 25℃.
2
*
Reduced by 5mW/℃ over 25℃.
3
*
Reduced by 5.0mW for each increase in Ta of 1℃ over 25℃.(When mounted on a board 70mm×70mm×1.6mm Glass-epoxy PCB)
4
*
Reduced by 6.5mW for each increase in Ta of 1℃ over 25℃.(When mounted on a board 70mm×70mm×1.6mm Glass-epoxy PCB)
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© 2011 ROHM Co., Ltd. All rights reserved.
2/12
2011.12 - Rev.B
BU2098F, BU2090F, BU2090FS
●Pin descriptions
BU2098F
PIN No. Pin Name I/O Function
1 A0 I
3 A2 I
4 Q0
5 Q1
6 Q2
O Open drain output
7 Q3
8 VSS - GND
9 Q4
10 Q5
11 Q6
O Open drain output
12 Q7
13 N.C. - Non connected
14 SCL I
15 SDA I/O
16 VDD -
BU2090F/BU2090FS
PIN No. Pin Name I/O Function
1 VSS - GND
2 DATA I Serial data input
3 CLOCK I
4 Q0
5 Q1
6 Q2
7 Q3
8 Q4
9 Q5
10 Q6
O
11 Q7
12 Q8
13 Q9
14 Q10
15 Q11
16 VDD -
Technical Note
Address input, internally pull-up 2 A1 I
Serial clock input
Serial data input/output
Power supply
Data shift clock input (rising edge trigger)
The shift data is transferred to the output when the input data logic
level is high during the falling transition of the clock pulse.
Parallel data output (Nch Open Drain FET)
Latch data L H
Output FET ON OFF
Power supply
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© 2011 ROHM Co., Ltd. All rights reserved.
3/12
2011.12 - Rev.B
BU2098F, BU2090F, BU2090FS
A
A
●Block diagram
BU2098F
Power-On Reset
SD
SCL
A0
A1
A2
I2C BUS
Controller
BU2090F/BU2090FS
CLOCK
Controller
DAT
●Interfaces
BU2090F/BU2090FS BU2090F/BU2090FS BU2098F
DATA, CLOCK Q0～Q11 Q0～Q7
V
V
DD
DD
IN
GND (V
)
SS
GND (V
)
SS
BU2098F BU2098F BU2098F
A0～A2 SDA SCL
V
V
DD
VDD
DD
IN
GND (V
)
GND (VSS)
SS
GND (V
SS
Technical Note
Shift
8bit
Register
Shift
12bit
Register
OUT
GND (VSS)
V
DD
IN
GND (V
)
)
GND (VSS)
SS
GND (V
)
SS
L
a
t
c
h
L
a
t
c
h
IN
GND (V
Write
Buffer
Write
Buffer
GND (VSS)
)
SS
Q0～Q11
OUT
V
DD
GND (V
Q0～Q7
)
SS
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© 2011 ROHM Co., Ltd. All rights reserved.
4/12
2011.12 - Rev.B
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