BU97981GU
低Duty LCD段码驱动器
BU97981GU
低Duty LCD段码驱动器
BU97981GU是1/4、1/3占空比的Static通用LCD驱动器，最多可显示196段的LCD。
内置显示用RAM，可减轻微控制器负荷，还无需外置部件，实现了低功耗。最多控制31个通用输出，可实现LED元件等的点亮，此外还内置3ch具有PWM功能的LED驱动器，还能实现背光、按钮LED等的照明。采用小型BGA封装，适用于小型电路板应用。
主要规格
特性：
Grade
Consumer
Segment Element
196
Duty
1/4, 1/3, Static
Bias
1/3
Elements of MUX 1:1
49
Elements of MUX 1:3
147
Elements of MUX 1:4
196
Interface [line serial]
3wire
Interface Voltage (Min.)[V]
1.8
Interface Voltage (Max.)[V]
3.6
Power Supply for LCD (Min.) [V]
3.3
Power Supply for LCD (Max.) [V]
5.5
Max GPO [port]
31
LED Driver [port]
3
LCD Driving Waveform
Line/Frame
Operating Temperature (Min.)[°C]
-30
Operating Temperature (Max.)[°C]
75
Package Size [mm]
5x5 (t=1.2)
特点：
- 1/4, 1/3duty or Static setting selectable
1/4duty driving: Max 196 segments
1/3duty driving: Max 147 segments
Static driving: Max 49 segments - 1/3 bias setting
- Power supply for Interface: 1.8V to 3.6V
- Power supply for LCD: 3.3V to 5.5V
- Integrated LCD voltage driving circuit
- Integrated oscillation circuit for LCD frame frequency
- Line or Frame inversion driving selectable
- Integrated 31ch general purpose outputs (SEG selectable)
- Integrated 3ch LED driver able to support 4096 step PWM illumination
- Support individual blink function with dedicated blink RAM integrated
- Support 3 wire serial interface
- Support INHb terminal to control Display ON/OFF
- Integrated voltage detected type power on reset circuit
- No external components required
- Low power consumption design
- Small BGA package
