Static 1/2 Duty 1/3 Duty 1/4 Duty 160 Outputs LCD Driver
Description
FEDL9489-02
Issue Date: Apr.
3, 2013
ML9489
Static, 1/2 Duty, 1/3 Duty, 1/4 Duty 160 Outputs LCD Driver
GENERAL DESCRIPTION
The ML9489 is an LCD driver LSI, consists of a 160-bit shift register, a 640-bit data latch, 160 sets of LCD drivers, and a common signal generation circuit.
It can directly drive an LCD up to 160 segments for static display, 320 segments for 1/2-duty display, 480 segments for 1/3-duty display, and 640 segments for 1/4-duty display.
The three-wire serial interface and I2C interface are selectable.
FEATURES
Logic power supply voltage : 2.
7 to 5.
5 V LCD drive power supply voltage : 4.
5 to 5.
5 V Maximum number of segments Static display : 160 segments 1/2-duty display : 320 segments 1/3-duty display : 480 segments 1/4-duty display : 640 segments Interface with microcomputer : Serial interface : DATA, CLOCK, LOAD CLOCK transfer speed up to 1 MHz : SDA, SCL, SDAACK I2C interface SCL transfer speed up to 400 kHz Built-in CR oscillator circuit using the internal resistor or External resistor Cascade connectable (up to eight chips) Built-in common signal generation circuit Built-in common output intermediate-value voltage generation circuit Built-in POC (Power On Clear) circuit Gold bump chip (ML9489DVWA) Comparison table Item ML 9479EDVWA ML9489DVWA Frame Frequency 65Hz/75Hz/85Hz/95Hz 130Hz/150Hz/170Hz/190Hz (Internal oscillation) (programmable) (programmable)
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FEDL9489-02
ML9489
BLOCK DIAGRAM
SEG1 VLCD SEG160
BIAS
Bias Resi.
160-Dot Segment Driver
160-Ch Data Selector
Duty0 Duty1 160 160-Bit Latch4 160 160-Bit Latch3 160 160-Bit Latch2 160 160-Bit Latch1
M/S
Latch Selector
I2C LOAD DATA (SDA) CLOCK (SCL) SDAACK SA0 A1 A0 OSC I/E OSC1 OSCR OSC2 CKO SYNCB POCEB RESETB 160
Command Decoder
160-bit Shift Register
OSC
Timing Generator
COMON Driver
COM1 COM2 COM3 COM4
POC
TEST1 TEST2
VDD GND
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FEDL9489-02
ML9489
ABSOLUTE MAXIMUM RATINGS
Item Logic power supply voltage LCD...
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