BL55072 Datasheet, PDF (1/1 Pages) SHANGHAI BELLING CO., LTD. – LCD Driver for 144 Display Units

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
 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
16
15
11
10
12
1-5
18-48
6-9
13
14
PIN Name
SDA
SCL
VDD
VLCD
VSS
SEG0-35
COM0-3
TEST1
OSCIO
17
TEST2
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Function
Serial data input
Serial data transfer clock
Power supply
LCD drive power supply
GND
Segment output
COM output
This Pin connect to VSS
External clock input, when use integrated
oscillator circuit, this Pin connect to VSS
POR function enable Pin
L: enable POR
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