AS1120_1 Datasheet, PDF (1/13 Pages) ams AG – 46-Segment LCD Driver

AS1120
46-Segment LCD Driver
Datasheet
1 General Description
The AS1120 is an LCD direct-driver capable of driving
up to 46 LCD segments with one non-multiplexed back-
plane.
The device contains an integrated serial-to-parallel inter-
face and generates the necessary signals to drive LCD
panels.
Internal synchronous backplane signal regeneration
allows the device to mix different drivers with different
LCDs for superior brightness stability over a wide tem-
perature range. The device also supports external back-
plane signals.
The AS1120 was specifically designed to easily inter-
face with a variety of microprocessors and a wide range
of LCD panel types.
The AS1120 is available in a 64-pin LQFP package.
2 Key Features
! 46-Segment LCD Driver
! Serial-to-Parallel Interface
! Integrated Oscillator w/ External R/C and Backplane
Input
! Supports Alphanumeric and Bar-Graph Devices
! Two Data Transfer Configurations:
- Cascade
- Parallel
! Non-Multiplexed Backplane
! Very-Low Current Consumption
! Power Supply Range: -0.3 to +7.0V
! Operating Temperature Range: -40 to +85ºC
! 64-pin LQFP Package
Figure 1. Application Diagram
3 Applications
The device is ideal for industrial LCD systems, portable-
system displays, panel meters with wide temperature
ranges, high-performance optical displays, or for any
other space-limited A/D application with low power-con-
sumption and single-supply requirements.
+VDD
REXT
CEXT
43
VDD
6
TEST
9
LOAD
13
RESETN
10
DATAIN
8
CLKIN
11
BPLIN
15
OSC
AS1120
XOR
46-bit
Register
46-bit
Shift Register
46-bit
OSC
Divide by
16
LCD[0:45]
7
DATAOUT
12
BPLOUT
42
VSS
14
VSSOSC
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