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BL55072
LCD Driver for 144 Display Units BL55072
(SEG36*COM4)
General Description
The BL55072 is a peripheral device, which interfaces to almost any Liquid
Crystal Display (LCD) having low multiplex rates. It generates the drive signals for
any static or multiplexed LCD containing up to 4 back planes and up to 36 segments.
The BL55072 is compatible with most microprocessors/micro controllers and
communicates via a two-line bi-directional IIC -bus.
Features
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LCD drive output: 4 Common output, 36 Segment output
36×4=144-bit RAM for display data storage
2 wire serial interface(IIC-bus)
Integrated Oscillator circuit
Integrated Buffer AMP for LCD driving, 1/3 Bias, 1/2 Bias, 1/4 Duty
No external components required
Low power consumption
Integrated POR
Versatile blinking modes
2.5 to 5.5V power supply range
Packages: TSSOP48
Application
Telephone, Power meter, Toy, Portable equipment, Car audio…
PIN Description
PIN No
PIN Name
Function
16
SDA
Serial data input
15
SCL
Serial data transfer clock
11
VDD
Power supply
10
VLCD
LCD drive power supply
12
VSS
GND
1-5
SEG0-35
Segment output
6-9
COM0-3
COM output
13
TEST1
This Pin connect to VSS
14
OSCIO
External clock input, when use integrated
18-48
oscillator circuit, this Pin connect to VSS
17
TEST2
POR function enable Pin
L: enable POR
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Ver1.0