ICM7211A
August 2001
4-Digit, LCD Display Driver
Description
The ICM7211A (LCD) device constitutes a family of non-mul-
tiplexed four-digit seven-segment CMOS display decoder-
drivers.
The ICM7211A devices are configured to drive conventional
LCD displays by providing a complete RC oscillator, divider
chain, backplane driver, and 28 segment outputs.
This device is available with multiplexed or microprocessor
input configurations. The multiplexed versions provide four
data inputs and four Digit Select inputs. This configuration is
suitable for interfacing with multiplexed BCD or binary output
devices, such as the ICL7135. The microprocessor versions
provide data input latches and Digit Address latches under
control of high-speed Chip Select inputs. These devices sim-
plify the task of implementing a cost-effective alphanumeric
seven-segment display for microprocessor systems, without
requiring extensive ROM or CPU time for decoding and dis-
play updating.
The ICM7211A provides the 鈥淐ode B鈥?output code, i.e., 0-9,
dash, E, H, L, P, blank, but will correctly decode true BCD to
seven-segment decimal outputs.
Features
鈥?Four Digit Non-Multiplexed 7 Segment LCD Display
Outputs with Backplane Driver
鈥?Complete Onboard RC Oscillator to Generate Backplane
Frequency
鈥?Backplane Input/Output Allows Simple Synchronization
of Slave-Devices to a Master
鈥?ICM7211A Devices Provide Separate Digit Select Inputs
to Accept Multiplexed BCD Input (Pinout and
Functionally Compatible with Siliconix DF411)
鈥?ICM7211AM Devices Provide Data and Digit Address
Latches Controlled by Chip Select Inputs to Provide a
Direct High Speed Processor Interface
鈥?Decodes Binary to Code B (0-9, Dash, E, H, L, P, Blank)
鈥?Available in Surface Mount Package
Ordering Information
PART NUMBER
ICM7211AlPL
ICM7211AMlPL
ICM7211AMlM44
DISPLAY
TYPE
LCD
LCD
LCD
DISPLAY
DECODING
Code B
Code B
Code B
INPUT
INTERFACING
Multiplexed
Microprocessor
Microprocessor
DISPLAY DRIVE
TYPE
Direct Drive
Direct Drive
Direct Drive
TEMP.
RANGE (
o
C)
-40脳 to 85脳
-40脳 to 85脳
-40脳 to 85脳
PACKAGE
40 Ld PDIP
40 Ld PDIP
44 Ld MQFP
PKG. NO.
E40.6
E40.6
Q44.10x10
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil and Design is a trademark of Intersil Americas Inc.
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Copyright 漏 Intersil Americas Inc. 2001
File Number
3158.4
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