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PDF BU9798KV Data sheet ( Hoja de datos )
| Número de pieza | BU9798KV | |
| Descripción | Multifunction Segment Drivers | |
| Fabricantes | ROHM Electronics | |
| Logotipo |  |
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LCD Segment Driver series
Multifunction
Segment Drivers
BU97930MUV,BU97931FV,BU9798KV,BU9798GUW,BU97500KV
No.10044EAT04
●Description
New released Multi-function type segment drivers support GPO function, LED driving function, static-driving mode, and
Blink function that can blink each segment individually.
ROHM Multi-function segment driver series contribute to reduction in cost of system and easy software development.
●Features (BU97930MUV, BU97931FV, BU9798KV/GUW)
1) LCD drive output
Common output : 4, Segment output : 27 (BU97930MUV)
Common output : 4, Segment output : 28 (BU97931FV)
Common output : 4, Segment output : 49 (BU9798KV/GUW)
2) Integrated Display data RAM (DDRAM)
RAM: 28*4 =112 bit (BU97930MUV, BU97931FV)
RAM: 49*4 =196 bit (BU9798KV/GUW)
3) 3-wire Serial interface (SD, SCL, CSB)
4) Integrated Oscillator circuit
5) Integrated LCD Voltage generator circuit
Support: 1/3 Bias, 1/3 or 1/4 Duty
Support: 1/1 Bias, 1/1Duty (Static Driving)
Integrated buffer amp
Integrated regulator for LCD drive: 3.2, 3.3, 3.4, 4.4, 4.5, 4.6, 5.0V selectable (BU9798KV/GUW)
6) Support Split Supply for Logic (VDD) and LCD (VLCD)
7) Integrated LED driver circuit
8) Segment terminals operation, segment output mode/GPO output mode selectable
9) Segment terminals operation, segment output mode/LED output mode selectable (BU9798KV/GUW)
10) Support PWM source select, external clock or internal clock
Resolution 8bit mode/12bit mode selectable (BU9798KV/GUW)
Resolution 8bit mode (BU97930MUV, BU97931FV)
11) Low power consumption design
12) Support standby mode
13) Integrated Power-On-Reset circuit (POR).
14) No external component
15) Support Independent blink function
Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable
16) Operating power supply : 1.8 ~ 3.6V
17) LCD drive power supply : 2.7 ~ 5.5V (BU97930MUV, BU97931FV)
: 3.3 ~ 5.5V (BU9798KV/GUW)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/23
2010.04 - Rev.A
1 page  
BU97930MUV,BU97931FV,BU9798KV,BU9798GUW,BU97500KV
Technical Note
Oscillation Frequency Characteristics (Ta=-40 ~ 85 °C, VDD=1.8V ~ 3.6V, VLCD=2.7V ~ 5.5V, VSS=0)
Parameter
Limits
Symbol
Unit
MIN MIN MIN
Conditions
Frame frequency 1
fFR1
57.6
64
70.4 Hz VDD=3.3V, Ta=25°C, fFR=64Hz setting
Frame frequency 2
fFR2
51.2
64
73.0 Hz VDD=2.5 ~ 3.6V FR=64Hz setting
Frame frequency 3
fFR3
45.0
-
64 Hz VDD=1.8 ~ 2.5V fFR=64Hz setting
MPU interface Characteristics (Ta=-40 ~ 85 °C, VDD=1.8V ~ 3.6V, VLCD=2.7V ~ 5.5V, VSS=0)
Parameter
Limits
Symbol
Unit
MIN TYP MAX
Conditions
Input rise time
tr - - 50 ns
Input fall time
tf - - 50 ns
SCL cycle time
tSCYC 250
-
- ns
“H” SCL pulse width
tSHW
50
-
- ns
“L” SCL pulse width
tSLW
50
-
- ns
SD setup time
tSDS
50
-
- ns
SD hold time
tSDH
50
-
- ns
CSB setup time
tCSS
50
-
- ns
CSB hold time
tCSH
50
-
- ns
“H” CSB pulse width
tCHW
50
-
- ns
CSB
SCL
SD
tCSS
tf
tSLW
tSCYC
tSHW
tSDS tSDH
tr
tCHW
tCSH
Fig.1 Serial Interface Timing
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/23
2010.04 - Rev.A
5 Page 
BU97930MUV,BU97931FV,BU9798KV,BU9798GUW,BU97500KV
Technical Note
Oscillation Characteristics (Ta=-40 ~ 85°C, VDD=2.7 ~ 5.5V, VLCD=4.5 ~ 5.5V , VSS=0V)
Parameters
Limits
Symbol
Unit
MIN TYP MAX
Conditions
Frame Frequency
fCLK
56
80 104 Hz fFR = 80Hz setting, 1/4 Duty setting
MPU interface Characteristics (Ta=-40 ~ 85°C, VDD=2.7V ~ 5.5V, VLCD=4.5 ~ 5.5V , VSS=0V)
Parameters
Symbol
MIN.
Limits
TYP.
Unit
MAX.
Conditions
Input Rise Time
tr - - 80 ns
Input Fall Time
tf - - 80 ns
SCL Cycle Time
tSCYC 400
-
- ns
“H” SCL Pulse Width
tSHW
100
-
- ns
“L” SCL Pulse Width
tSLW
100
-
- ns
SD Setup Time
tSDS
20
-
- ns
SD Hold Time
tSDH
20
-
- ns
CSB Setup Time
tCSS
50
-
- ns
CSB Hold Time
tCSH
50
-
- ns
“H” CSB Pulse Time
tCHW
50
-
- ns
CSB
SCL
tCSS
tf
tSLW
tSCYC
tSHW
tr
tCHW
tCSH
tSDS tSDH
SD
Fig.4 Serial interface Timing
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/23
2010.04 - Rev.A
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet BU9798KV.PDF ] | |
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