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Serial-in / Parallel-out Driver Series
Serial / Parallel
4-input Drivers
BU2050F,BU2092F,BU2092FV,BU2099FV,BD7851FP,BU2152FS
No.09051EAT03
Description
Serial-in-parallel-out driver incorporates a built-in shift register and a latch circuit to control a maximum of 24 LED by a 4-line
interface, linked to a microcontroller.
A single external resistor can set the output current value of the constant current up to a maximum of 50mA. (BD7851FP only)
CMOS open drain output type products can drive the maximum current of 25mA.
Features
1) LED can be driven directly.
2) Parallel output of a maximum of 24 bit
3) Operational on low voltage (2.7V to 5.5V)
4) Cascade connection is possible (BU2050F and BU2092F,BU2092FV are not acceptable)
Application
For AV equipment such as, audio stereo sets, videos and TV sets, PCs, control microcontroller mounted equipment.
Product line-up
Parameter
Output current
Output line
Output type
Package
BU2050F
25
8
CMOS
SOP14
BU2092F
25
12
SOP18
BU2092FV
25
12
Open drain
SSOP-B20
BU2099FV
25
12
SSOP-B20
BD7851FP
50
16
Constant
current
HSOP25
BU2152FS
25
24
CMOS
SSOP-A32
Unit
mA
line
-
-
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1/24
2009.06 - Rev.A

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BU2050F,BU2092F,BU2092FV,BU2099FV,BD7851FP,BU2152FS
Technical Note
Thermal derating curve
700
600
BU2050F
500
400
BU2099FV
300
200
100
85
0
25 50 75 100 125 150 175
Ambient temperature Ta []
700
600
BU2092F
500
400
BU2092FV
300
200
100
0
25 50 75 100 125 150 175
Ambient temperature Ta []
1600
1400
1200
1000
800
600
400
200
0
BD7851FP
BU2152FS
85
25 50 75 100 125 150 175
Ambient temperature Ta []
Absolute maximum ratings (Ta=25)
Parameter
Symbol
BU2050F
Limits
BU2092F
BU2092FV
Power Supply Voltage
Power dissipation 1
Power dissipation 2
VDD
Pd1
Pd2
-0.3 to +7.0
450 *1
-
-0.3 to +7.0
450 (SOP) *2
400 (SSOPB) *3
550 (SOP) *4
650 (SSOPB) *5
Input Voltage
VIN VSS-0.3 to VDD+0.5
VSS-0.3 to VDD+0.3
Output Voltage
Vo VSS-0.3 to VDD+0.5
VSS to +25.0
Operating Temperature
Topr
-40 to +85
-25 to +75
Storage Temperature Tstg -55 to +125
-55 to +125
*1 Reduced by 4.5mW/over 25
*2 Reduced by 4.5mW/over 25
*3 Reduced by 4.0mW/over 25
*4 Reduced by 5.5mW/for each increase in Ta of 1over 25(When mounted on a board 50mm×50mm×1.6mm Glass-epoxy PCB).
*5 Reduced by 6.5mW/for each increase in Ta of 1over 25(When mounted on a board 70mm×70mm×1.6mm Glass-epoxy PCB).
Unit
V
mW
mW
V
V
Parameter
Symbol
BU2099FV
Limits
BD7851FP
BU2152FS
Power Supply Voltage
Power dissipation 1
Power dissipation 2
VDD -0.3 to +7.0
Pd1 400 (SSOPB) *6
Pd2 650 (SSOPB) *9
0 to +7.0
1450 *7
-
-0.3 to +7.0
800 *8
-
Input Voltage
VIN VSS-0.3 to VDD+0.3 -0.3 to VCC+0.3 VSS-0.3 to VDD+0.3
Output Voltage
Vo VSS to +25.0
0 to +10
VSS-0.3 to VDD+0.3
Operating Temperature
Topr
-40 to +85
-30 to +85
-25 to +85
Storage Temperature Tstg -55 to +125
-55 to +150
-55 to +125
*6 Reduced by 4.5mW/over 25
*7 Reduced by 11.6mW/over 25
*8 Reduced by 8.0mW/over 25
*9 Reduced by 6.5mW/for each increase in Ta of 1over 25(When mounted on a board 70mm×70mm×1.6mm Glass-epoxy PCB).
Unit
V
mW
mW
V
V
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© 2009 ROHM Co., Ltd. All rights reserved.
2/24
2009.06 - Rev.A

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BU2050F,BU2092F,BU2092FV,BU2099FV,BD7851FP,BU2152FS
Technical Note
Electrical characteristics
BU2050F (Unless otherwise noted, Ta=25, VDD=4.5 to 5.5V)
Parameter
Symbol
Min.
Power Supply Voltage
VDD 4.5
Input high-level Voltage
VIH 0.7VDD
Input low-level Voltage
VIL VSS
Input Hysteresis
VHYS
-
VDD-1.5
Output high-level Voltage
VOHD
VDD-1.0
VDD-0.5
VSS
Output low-level Voltage
VOLD
VSS
VSS
Quiescent Current
IDD -
Typ.
-
-
-
0.5
-
-
-
-
-
-
-
Max.
5.5
VDD
0.3VDD
-
VDD
VDD
VDD
1.5
0.8
0.4
0.1
Unit Condition
V
V
V
V
IOH=-25mA
V IOH=-15mA
IOH=-10mA
IOL=25mA
V IOL=15mA
IOL=10mA
mA VIH=VDD, VIL=VSS
BU2092F/BU2092FV (Unless otherwise noted, Ta=25, VSS=0V, VDD=5.0V/3.0V)
Parameter
Symbol
Min.
Typ.
Max.
Power Supply Voltage
VDD 2.7 - 5.5
Input high-level Voltage
VIH 3.5 / 2.5
-
-
Input low-level Voltage
VIL -
- 1.5 / 0.4
Output low-level Voltage
VOL -
- 2.0 / 1.0
Output high-level disable Current
Output low-level disable Current
IOZH
IOZL
-
-
- 10.0
- -5.0
Quiescent Current
IDD -
- 5.0 / 3.0
BU2099FV (Unless otherwise noted, Ta=25, VSS=0V, VDD=5.0V/3.0V)
Parameter
Symbol
Min.
Typ.
Power Supply Voltage
VDD 2.7
-
Input high-level Voltage
VIH 3.5 / 2.1
-
Input low-level Voltage
VIL -
-
Output high-level Voltage (SO)
VOH
VDD-0.5
/ VDD-0.3
-
Output low-level Voltage 1 (Qx)
VOL1
-
-
-
-
-
-
Output low-level Voltage 2 (SO)
VOL2
-
-
Output high-level disable Current
(Qx)
Output low-level disable Current
(Qx)
IPULLDOWN (OE)
Low Voltage Reset
IOZH
IOZL
IPD
VCLR
-
-
-
1.1
-
-
-
-
Quiescent Current
IDD -
-
Max.
5.5
-
1.5 / 0.9
-
1.0
1.5
2.0
0.4 / 0.3
10
-5.0
150 / 60
2.4
200
Unit Condition
V
V VDD=5V/3V
V VDD=5V/3V
V
VDD=5V/3V,
IOL=20mA/5mA
μA VO=25.0V
μA VO=0V
VIN=VSS or VDD
μA (VDD=5V/3V)
OUTPUT:OPEN
Unit Condition
V
V VDD=5V/3V
V VDD=5V/3V
V
VDD=5V/3V,
IOH=-400μA/-100μA
VDD=5V/3V,
IOL1=10mA/5mA
V VDD=5V, IOL1=15mA
VDD=5V, IOL1=20mA
V
VDD=5V/3V,
IOL2=1.5mA/0.5mA
μA VO=25.0V
μA VO=0V
μA OE= VDD, VDD=5V/3V
V
VIN=VSS or VDD,
μA VDD=5V
OUTPUT:OPEN
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3/24
2009.06 - Rev.A

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BU2050F,BU2092F,BU2092FV,BU2099FV,BD7851FP,BU2152FS
Technical Note
Electrical characteristics
BD7851FP (Unless otherwise noted, Ta=25, VCC=5.0V)
Parameter
Symbol
Min.
Power Supply Voltage
VDD 4.5
Input high-level Voltage
VIH 0.8×VCC
Input low-level Voltage
VIL -
Output high-level Voltage
VOH
VCC-0.5
Output low-level Voltage
VOL -
-
Quiescent Current
-
ICC
-
Reference Current Output Current
(including the equation between
each bit)
Equation between each bit of
Reference Current Output Current
Change rate of reference current
output current for output voltage
Output Leak Current
Iolc1
Iolc2
Δiolc
IΔVCC
IOH
-
48
5.0
-
-
-
Typ.
-
-
-
-
-
0.7
1.8
4.0
30
55
5.9
±1
±1
0.01
BU2152FS (Unless otherwise noted, Ta=25, VDD=2.7 to 5.5V)
Parameter
Symbol
Min.
Typ.
Power Supply Voltage
VDD 2.7
-
Input high-level Voltage
VIH 2.0
-
Input low-level Voltage
VIL -
-
VDD-1.5
-
Output high-level Voltage
VOH
VDD-1.0
-
VDD-0.5
-
--
Output low-level Voltage
VOL -
-
--
Quiescent Current
IDDST
-
-
Input high-level Current
IIH -
-
Input low-level Current
IIL -
-
Max.
5.5
-
0.2×VCC
-
0.5
1.0
3.0
6.5
40
62
6.8
±6
±6
0.8
Unit Condition
V
V
V
V IOH=-1mA
V IOL=1mA
mA
R=13k
OUT1OUT16:OFF
mA
R=1.3k
OUT1OUT16:OFF
mA
R=13k
OUT1OUT16:ON
mA
R=1.3k
OUT1OUT16:ON
mA VOUT=2.0V, R=1.3k
mA VOUT=2.0V, R=13k
%
VOUTn=2.0V, R=1.3k
(1bit : ON)
%/V
VOUT=2.0 to 3.0V,
R=1.3k
μA VOUT=10V
Max.
5.5
-
0.6
-
-
-
1.5
1.0
0.8
5
1
1
Unit Condition
V
V VDD=5V
V VDD=5V
IOH=-25mA
V IOH=-15mA
IOH=-10mA
IOL=25mA
V IOL=15mA
IOL=10mA
μA VIL=VSS, VIH=VDD
μA
μA
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2009.06 - Rev.A

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BU2050F,BU2092F,BU2092FV,BU2099FV,BD7851FP,BU2152FS
Technical Note
Block diagram
BU2050F
STB
CLR
CLOCK
DATA
BU2092F/BU2092FV
LCK
CLOCK
DATA
Controller
Controller
Shift
Register
8bit
L
a Write
t
c Buffer
h
P1P8
Shift
Register
12bit
L
a Write
t
c Buffer
h
Q0Q11
OE
BU2099FV
LCK LPF
CLOCK
DATA
Controller
Shift
Register
12bit
L
a Write
t
c Buffer
h
Q0Q11
OE
BD7851FP
S_IN
CLOCK
Shift
Register
16bit
L
a Write
t
c Buffer
h
OUT1OUT16
LATCH
ENABLE
R_Iref
SOUT
Current Adjustment
BU2152FS
STB
CLB
CLOCK
DATA
Controller
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© 2009 ROHM Co., Ltd. All rights reserved.
Shift
Register
24bit
5/24
L
a Write
t
c Buffer
h
P1P24
SO
2009.06 - Rev.A