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.
2
4) Compatible with I C BUS. (BU2098)
●Use
For AV equipment such as, audio stereo sets, videos and TV sets, PCs, control microcontroller mounted equipment.
●Line
up
Parameter
Output current
Output line
Package
BU2098F
25
8
SOP16
SOP16
BU2090F
25
12
SSOP-A16
BU2090FS
Unit
mA
lines
－
●Thermal
derating curve
700
Pd
[mW]
Pd
[mW]
600
500
400
300
200
100
85℃
700
600
500
400
300
200
100
0
BU2090FS
Power dissipation
BU2098F
Power dissipation
BU2090F
0
25
50
75
100
125
150
175
25
50
75
100
125
150
175
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, V
DD
=5V, Vss=0V, Ta=25℃)
Parameter
Symbol
Min.
Typ.
Input High-level voltage
Input Low-level voltage
Output Low-level voltage
Input Low-level current
Input High-level current
Output leakage current
Static dissipation current
V
IH
V
IL
V
OL
I
IL
I
IH
I
OZ
I
DD
0.7×V
DD
-
-
-
-
-
-
-
-
-
-
-
-
Technical Note
Max.
-
0.3×V
DD
0.4
2.0
-2.0
±5.0
2.0
Unit
V
V
V
μA
μA
μA
μA
Condition
I
OUT
=10mA
V
IN
=0
V
IN
=V
DD
Output=High impedance
V
OUT
=V
DD
BU2090F/BU2090FS (unless otherwise noted, V
DD
=5V, V
SS
=0V, Ta=25℃)
Parameter
Symbol
Min.
Typ.
Max.
3.5
-
-
Input High-level voltage
V
IH
2.5
-
-
-
-
1.5
Input Low-level voltage
V
IL
-
-
0.4
-
-
2.0
Output Low-level voltage
V
OL
-
-
1.0
“H” output disable current
“L” output disable current
Static dissipation current
I
OZH
I
OZL
I
DD
-
-
-
-
-
10
-5.0
5.0
3.0
Unit
V
V
V
V
V
V
μA
μA
μA
μA
Condition
V
DD
=5V
V
DD
=3V
V
DD
=5V
V
DD
=3V
V
DD
=5V,I
OL
=20mA
V
DD
=3V,I
OL
=5mA
V
O
=25V
V
O
=0V
V
DD
=5V
V
DD
=3V
●Operating
conditions (Ta=25℃, V
SS
=0V)
Parameter
Power Supply Voltage
Output Voltage
●Absolute
maximum ratings
BU2098F, BU2090F,BU2090FS
Parameter
Power supply voltage
Power dissipation1
Power dissipation2
Operating temperature range
Storage temperature range
Output voltage
Input voltage
Symbol
V
DD
Pd1
Pd2
Topr
Tstg
Vo
V
IN
V
SS
to +18.0
-0.5 to V
DD
+0.5
Limits
BU2098F
-0.5 to +7.0
300
-
*
1
Symbol
V
DD
Vo
Limits
BU2098F
+2.7 to 5.5
0 to +15
0 to +25
BU2090F/BU2090FS
Unit
V
V
BU2090F
300
500
*
1
3
BU2090FS
-0.3 to +7.0V
500
650
*
2
Unit
V
*
*
4
mW
℃
℃
V
V
-40 to +85
-55 to +125
V
SS
-0.3 to +25V
V
SS
-0.3 to V
DD
+0.3V
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A0
A1
A2
Q0
Q1
Q2
Q3
V
SS
Q4
Q5
Q6
Q7
N.C.
SCL
SDA
V
DD
-
I
I/O
-
Non connected
Serial clock input
Serial data input/output
Power supply
O
Open drain output
-
GND
O
Open drain output
Technical Note
I/O
I
I
I
Function
Address input, internally pull-up
BU2090F/BU2090FS
PIN No.
Pin Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
SS
DATA
CLOCK
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
V
DD
I/O
-
I
I
GND
Serial data input
Function
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)
O
Latch data
Output FET
L
ON
H
OFF
-
Power supply
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© 2011 ROHM Co., Ltd. All rights reserved.
3/12
2011.12 - Rev.B
BU2098F, BU2090F, BU2090FS
●Block
diagram
BU2098F
Power-On Reset
Technical Note
SDA
SCL
I
2
C BUS
A0
A1
A2
Controller
Shift
Register
8bit
L
a
t
c
h
Write
Buffer
Q0½Q7
BU2090F/BU2090FS
CLOCK
Controller
Shift
Register
DATA
12bit
L
a
t
c
h
Write
Buffer
Q0½Q11
●Interfaces
BU2090F/BU2090FS
DATA, CLOCK
V
DD
V
DD
OUT
OUT
BU2090F/BU2090FS
Q0½Q11
BU2098F
Q0½Q7
IN
GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
BU2098F
A0½A2
V
DD
V
DD
V
DD
BU2098F
SDA
V
DD
BU2098F
SCL
V
DD
IN
IN
IN
GND (V
SS
) GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
GND (V
SS
)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
4/12
2011.12 - Rev.B
BU2098F, BU2090F, BU2090FS
【BU2098F】
●AC
characteristics (Unless otherwise noted, V
DD
=5V, V
SS
=0V, Ta=25℃)
2
Fast mode I C BUS
Parameter
Symbol
Min.
Max.
SCL clock frequency
Bus free time between start-stop condition
Hold time start condition
Low period of the SCL clock
High period of the SCL clock
Set up time Re-start condition
Data hold time
Data set up time
Rise time of SDA and SCL
Fall time of SDA and SCL
Set up time stop condition
Capacitive load for SDA line and SCL line
f
SCL
t
BUS
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
t
F
t
SU:STO
Cb
0
1.3
0.6
1.3
0.6
0.6
0
100
20+0.1Cb
20+0.1Cb
0.6
-
400
-
-
-
-
-
0.9
-
300
300
-
400
Technical Note
Standard mode I
2
C BUS
Min.
0
4.7
4.0
4.7
4.0
4.7
0
250
-
-
4.0
-
Max.
100
-
-
-
-
-
-
-
1000
300
-
400
Unit
kHz
μs
μs
μs
μs
μs
μs
ns
ns
ns
μs
pF
●Timing
chart
SDA
t
BUS
t
HD:STA
t
LOW
t
r
t
f
SCL
t
HD:STA
t
SU:STO
P
S
t
HD:DAT
t
SU:DAT
t
SU:STA
Sr
P
Fig.1 SDA, SCL timing chart
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© 2011 ROHM Co., Ltd. All rights reserved.
5/12
2011.12 - Rev.B
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