TECHNICAL NOTE
Serial-in / Parallel-out Driver Series
Serial / Parallel
4-input Drivers
BU2050F, BU2092F/FV, BU2099FV, BD7851FP, BU2152FS
●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 (2.7V½5.5V)
4) Cascade connection is possible (BU2050F and BU2092F/FV 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
BU2092FV
25
12
Open drain
BU2099FV
25
12
BD7851FP
50
16
Constant
BU2152FS
25
24
CMOS
Unit
mA
line
-
-
current
SOP18
SSOP-B20
SSOP-B20
HSOP25
SSOP-A32
Mar. 2008
●Thermal
derating curve
700
Pd
[mW]
600
BU2050F
500
400
BU2099FV
300
200
100
85℃
700
Pd
[mW]
600
BU2092F
500
400
BU2092FV
300
200
100
0
Power dissipation
0
25
50
75
100
125
150
175
Power dissipation
25
50
75
100
125
150
175
Ambient temperature Ta
[℃]
Ambient temperature Ta
[℃]
1600
Pd
[mW]
1400
BD7851FP
1200
1000
BU2152FS
800
600
400
200
85℃
Power dissipation
0
25
50
75
100
125
150
175
Ambient temperature Ta
[℃]
●Absolute
maximum ratings (Ta=25℃)
Limits
BU2092F
2
Parameter
Power Supply Voltage
Power dissipation 1
Power dissipation 2
Input Voltage
Output Voltage
Operating Temperature
Storage Temperature
*
1
Reduced by 4.5mW/℃
*
2
Reduced by 4.5mW/℃
*
3
Reduced by 4.0mW/℃
*
4
Reduced by 5.5mW/℃
*
5
Reduced by 6.5mW/℃
Symbol
V
DD
Pd1
Pd2
V
IN
Vo
Topr
Tstg
BU2050F
-0.3½+7.0
450 *
1
-
V
SS
-0.3½V
DD
+0.5
V
SS
-0.3½V
DD
+0.5
-40½+85
-55½+125
BU2092FV
Unit
V
mW
mW
V
V
℃
℃
-0.3½+7.0
450 (SOP) *
400 (SSOPB) *
3
550 (SOP) *
4
650 (SSOPB) *
5
V
SS
-0.3½V
DD
+0.3
V
SS
½+25.0
-25½+75
-55½+125
over 25℃
over 25℃
over 25℃
for each increase in Ta of 1℃ over 25℃ (When mounted on a board 50mm×50mm×1.6mm Glass-epoxy PCB).
for each increase in Ta of 1℃ over 25℃ (When mounted on a board 70mm×70mm×1.6mm Glass-epoxy PCB).
Parameter
Power Supply Voltage
Power dissipation 1
Power dissipation 2
Input Voltage
Output Voltage
Operating Temperature
Storage Temperature
Symbol
V
DD
Pd1
Pd2
V
IN
Vo
Topr
Tstg
BU2099FV
-0.3½+7.0
400 (SSOPB) *
6
650 (SSOPB) *
9
V
SS
-0.3½V
DD
+0.3
V
SS
½+25.0
-40½+85
-55½+125
Limits
BD7851FP
0½+7.0
1450 *
7
-
-0.3½V
CC
+0.3
0½+10
-30½+85
-55½+150
BU2152FS
-0.3½+7.0
800 *
8
-
V
SS
-0.3½V
DD
+0.3
V
SS
-0.3½V
DD
+0.3
-25½+85
-55½+125
Unit
V
mW
mW
V
V
℃
℃
*
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 1℃ over 25℃ (When mounted on a board 70mm×70mm×1.6mm Glass-epoxy PCB).
2/24
●Electrical
characteristics
BU2050F
(Unless otherwise noted, Ta=25℃, V
DD
=4.5½5.5V)
Parameter
Symbol
Min.
Power Supply Voltage
V
DD
4.5
Input high-level Voltage
V
IH
0.7V
DD
Input low-level Voltage
V
IL
V
SS
Input Hysteresis
V
HYS
-
V
DD
-1.5
Output high-level Voltage
V
OHD
V
DD
-1.0
V
DD
-0.5
V
SS
Output low-level Voltage
V
OLD
V
SS
V
SS
Quiescent Current
I
DD
-
Typ.
-
-
-
0.5
-
-
-
-
-
-
-
Max.
5.5
V
DD
0.3V
DD
-
V
DD
V
DD
V
DD
1.5
0.8
0.4
0.1
Unit
V
V
V
V
V
Condition
V
mA
I
OH
=-25mA
I
OH
=-15mA
I
OH
=-10mA
I
OL
=25mA
I
OL
=15mA
I
OL
=10mA
V
IH
=V
DD
, V
IL
=V
SS
BU2092F/FV
(Unless otherwise noted, Ta=25℃, V
SS
=0V, V
DD
=5.0V/3.0V)
Parameter
Symbol
Min.
Typ.
Power Supply Voltage
V
DD
2.7
-
Input high-level Voltage
V
IH
3.5 / 2.5
-
Input low-level Voltage
V
IL
-
-
Output low-level Voltage
Output high-level disable Current
Output low-level disable Current
Quiescent Current
V
OL
I
OZH
I
OZL
I
DD
-
-
-
-
-
-
-
-
Max.
5.5
-
1.5 / 0.4
2.0 / 1.0
10.0
-5.0
5.0 / 3.0
Unit
V
V
V
V
μA
μA
μA
Condition
V
DD
=5V/3V
V
DD
=5V/3V
V
DD
=5V/3V,
I
OL
=20mA/5mA
V
O
=25.0V
V
O
=0V
V
IN
=V
SS
or V
DD
(V
DD
=5V/3V)
OUTPUT:OPEN
BU2099FV
(Unless otherwise noted, Ta=25℃, V
SS
=0V, V
DD
=5.0V/3.0V)
Parameter
Power Supply Voltage
Input high-level Voltage
Input low-level Voltage
Output high-level Voltage (SO)
Symbol
V
DD
V
IH
V
IL
V
OH
Min.
2.7
3.5 / 2.1
-
V
DD
-0.5
/ V
DD
-0.3
-
Output low-level Voltage 1 (Qx)
V
OL1
-
-
-
-
-
-
1.1
-
Typ.
-
-
-
-
-
-
-
-
-
-
-
-
-
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
V
Unit
V
V
V
V
Condition
V
DD
=5V/3V
V
DD
=5V/3V
V
DD
=5V/3V,
I
OH
=-400μA/-100μA
V
DD
=5V/3V,
I
OL1
=10mA/5mA
V
DD
=5V, I
OL1
=15mA
V
DD
=5V, I
OL1
=20mA
V
DD
=5V/3V,
I
OL2
=1.5mA/0.5mA
V
O
=25.0V
V
O
=0V
OE= V
DD
, V
DD
=5V/3V
V
IN
=V
SS
or V
DD
,
V
DD
=5V
OUTPUT:OPEN
Output low-level Voltage 2 (SO)
Output high-level disable Current
(Qx)
Output low-level disable Current
(Qx)
I
PULLDOWN
(OE)
Low Voltage Reset
Quiescent Current
V
OL2
I
OZH
I
OZL
I
PD
V
CLR
I
DD
V
μA
μA
μA
V
μA
3/24
●Electrical
characteristics
BD7851FP
(Unless otherwise noted, Ta=25℃, V
CC
=5.0V)
Parameter
Symbol
Min.
Power Supply Voltage
V
DD
4.5
Input high-level Voltage
V
IH
0.8×V
CC
Input low-level Voltage
V
IL
-
Output high-level Voltage
V
OH
V
CC
-0.5
Output low-level Voltage
V
OL
-
-
-
Quiescent Current
I
CC
-
-
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
IΔV
CC
I
OH
48
5.0
-
-
-
4.0
30
55
5.9
±1
±1
0.01
6.5
40
62
6.8
±6
±6
0.8
mA
mA
mA
mA
%
%/V
μA
Typ.
-
-
-
-
-
0.7
1.8
Max.
5.5
-
0.2×V
CC
-
0.5
1.0
3.0
Unit
V
V
V
V
V
mA
mA
Condition
I
OH
=-1mA
I
OL
=1mA
R=13kΩ
OUT1½OUT16:OFF
R=1.3kΩ
OUT1½OUT16:OFF
R=13kΩ
OUT1½OUT16:ON
R=1.3kΩ
OUT1½OUT16:ON
V
OUT
=2.0V, R=1.3kΩ
V
OUT
=2.0V, R=13kΩ
V
OUTn
=2.0V, R=1.3kΩ
(1bit : ON)
V
OUT
=2.0½3.0V,
R=1.3kΩ
V
OUT
=10V
BU2152FS
(Unless otherwise noted, Ta=25℃, V
DD
=2.7½5.5V)
Parameter
Symbol
Min.
Typ.
Power Supply Voltage
V
DD
2.7
-
Input high-level Voltage
V
IH
2.0
-
Input low-level Voltage
V
IL
-
-
-
V
DD
-1.5
Output high-level Voltage
V
OH
V
DD
-1.0
-
V
DD
-0.5
-
-
-
Output low-level Voltage
V
OL
-
-
-
-
Quiescent Current
I
DDST
-
-
Input high-level Current
I
IH
-
-
Input low-level Current
I
IL
-
-
Max.
5.5
-
0.6
-
-
-
1.5
1.0
0.8
5
1
1
Unit
V
V
V
V
Condition
V
DD
=5V
V
DD
=5V
I
OH
=-25mA
I
OH
=-15mA
I
OH
=-10mA
I
OL
=25mA
I
OL
=15mA
I
OL
=10mA
V
IL
=V
SS
, V
IH
=V
DD
V
μA
μA
μA
4/24
●Block
diagram
BU2050F
STB
CLR
Shift
CLOCK
DATA
Register
Controller
8bit
L
a
t
c
h
Write
Buffer
P1½P8
BU2092F/FV
LCK
CLOCK
DATA
Controller
12bit
Shift
Register
L
a
t
c
h
Write
Buffer
Q0½Q11
OE
BU2099FV
LCK
CLOCK
DATA
LPF
Controller
12bit
Shift
Register
L
a
t
c
h
Write
Buffer
Q0½Q11
OE
BD7851FP
S_IN
Shift
CLOCK
Register
L
a
t
c
h
16bit
Write
Buffer
OUT1½OUT16
LATCH
ENABLE
R_Iref
Current Adjustment
SOUT
BU2152FS
STB
CLB
Shift
CLOCK
DATA
SO
5/24
Register
Controller
24bit
L
a
t
c
h
Write
Buffer
P1½P24
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