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BU2872AK Datasheet(PDF) 3 Page - Rohm

Part # BU2872AK
Description  FL tube driver
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BU2872AK Datasheet(HTML) 3 Page - Rohm

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3
Standard ICs
BU2872AK
Electrical characteristics (unless otherwise noted, Ta = 25°C, VDD = 5V, VSS = 0V, VDD-VEE = 30V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Measurement circuit
Supply current
Input threshold voltage
Input current
Oscillation frequency
Segment output current
Grid output current
Off level leakage current
Output pull-down resistance
LED output high level voltage
LED output low level voltage
〈Serial transfer〉
Input data hold
Input data setup
Output data delay
Input clock cycle
Input clock "H" width
IDD
——
5mA
Pin 44 external 1000 pF, when oscillated
Fig.1
VIN
1.5
3.5
V
Pins 1 to 4, 6, 8, 9 to 13
Fig.5
IIN
——
10
µA
Pins 1 to 4, 6, 8, 9 to 13
Fig.2
FOSC
130
200
300
kHz
Pin 44 external 1000 pF
Fig.4
IOseg
7
——
mA
Fig.2
IOgrd
20
——
mA
Fig.2
IOFF
——
10
µA
Fig.2
RD
15
31
60
k
Fig.2
VOH
4.0
——
V
Fig.3
VOL
——
1.0
V
Fig.3
TSH
0.16
——
µs
TSS
0.16
——
µs
TD
——
0.3
µs
TSCYC
0.5
——
µs
T40
60
%
Pins 15 to 26, 28 to 31 VO = VDD – 2V 2
Pins 26, 28 to 37 VO = VDD – 2V 2
Pins 15 to 26, 28 to 37 VO = VDD – VEE
Pins 15 to 26, 28 to 37
Pins 39 to 42 IO = 1mA
Pins 39 to 42 IO = – 10mA
Input clock cycle at minimum value
2 Each of the high withstanding voltage output pins, pins 26 and 28 to 31, outputs the segment output current when set to the segment output and
the grid current when set to the grid output.
Measurement circuits
VEE
VDD
OSC
VSS
1000p
A
Fig.1
VEE
VDD
VSS
n
n
= Test pin
A
V
Fig.2
VEE
VDD
VSS
n
V
n
= Test pin
I
Fig.3
OSC
1000p
Monitor
G1
VEE
VDD
VSS
Fig.4
VEE
VDD
VSS
Fig.5


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