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 (2.7V～5.5V)
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
BU2050F
BU2092F
BU2092FV
BU2099FV
BD7851FP
BU2152FS
Unit
Output current
25
25
25
25
50
25
mA
Output line
8
12
12
12
16
24
line
Output type
CMOS
CMOS
-
SSOP-A32
-
Constant
Open drain
current
Package
SOP14
SOP18
SSOP-B20
SSOP-B20
HSOP25
Mar. 2008
●Electrical characteristics
BU2050F (Unless otherwise noted, Ta=25℃, VDD=4.5～5.5V)
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
V
V
V
V
BU2092F/FV (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 / 2.5
Input low-level Voltage
VIL
-
Max.
5.5
1.5 / 0.4
Unit
V
V
V
Output low-level Voltage
VOL
-
-
2.0 / 1.0
V
Output high-level disable Current
Output low-level disable Current
IOZH
IOZL
-
-
10.0
-5.0
μA
μA
Quiescent Current
IDD
-
-
5.0 / 3.0
μA
Max.
5.5
1.5 / 0.9
Unit
V
V
V
-
V
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
VDD-0.5
Output high-level Voltage (SO)
VOH
/ VDD-0.3
-
-
1.5
2.0
V
mA
1.0
-
V
IOH=-25mA
IOH=-15mA
IOH=-10mA
IOL=25mA
IOL=15mA
IOL=10mA
VIH=VDD, VIL=VSS
Condition
VDD=5V/3V
VDD=5V/3V
VDD=5V/3V,
IOL=20mA/5mA
VO=25.0V
VO=0V
VIN=VSS or VDD
(VDD=5V/3V)
OUTPUT:OPEN
Condition
VDD=5V/3V
VDD=5V/3V
VDD=5V/3V,
IOH=-400μA/-100μA
VDD=5V/3V,
IOL1=10mA/5mA
VDD=5V, IOL1=15mA
VDD=5V, IOL1=20mA
VDD=5V/3V,
IOL2=1.5mA/0.5mA
Output low-level Voltage 1 (Qx)
VOL1
Output low-level Voltage 2 (SO)
VOL2
-
-
0.4 / 0.3
V
IOZH
-
-
10
μA
VO=25.0V
IOZL
-
-
-5.0
μA
VO=0V
IPD
VCLR
1.1
-
150 / 60
2.4
μA
V
OE= VDD, VDD=5V/3V
IDD
-
-
200
μA
Output high-level disable Current
(Qx)
Output low-level disable Current
(Qx)
IPULLDOWN (OE)
Low Voltage Reset
Quiescent Current
3/24
V
Condition
VIN=VSS or VDD,
VDD=5V
OUTPUT:OPEN
