1

August 2001

ICM7211A

4-Digit, LCD Display Driver

Features

• Four Digit Non-Multiplexed 7 Segment LCD Display

Outputs with Backplane Driver

• Complete Onboard RC Oscillator to Generate Backplane

Frequency

• Backplane Input/Output Allows Simple Synchronization

of Slave-Devices to a Master

• ICM7211A Devices Provide Separate Digit Select Inputs

to

Accept

Multiplexed

BCD

Input

(Pinout

and

Functionally Compatible with Siliconix DF411)

• ICM7211AM Devices Provide Data and Digit Address

Latches Controlled by Chip Select Inputs to Provide a

Direct High Speed Processor Interface

• Decodes Binary to Code B (0-9, Dash, E, H, L, P, Blank)

• Available in Surface Mount Package

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 “Code B” output code, i.e., 0-9,

dash, E, H, L, P, blank, but will correctly decode true BCD to

seven-segment decimal outputs.

Ordering Information

PART NUMBER

DISPLAY

TYPE

DISPLAY

DECODING

INPUT

INTERFACING

DISPLAY DRIVE

TYPE

TEMP.

PACKAGE

PKG. NO.

ICM7211AlPL

LCD

Code B

Multiplexed

Direct Drive

-40× to 85×

40 Ld PDIP

E40.6

ICM7211AMlPL

LCD

Code B

Microprocessor

Direct Drive

-40× to 85×

40 Ld PDIP

E40.6

ICM7211AMlM44

LCD

Code B

Microprocessor

Direct Drive

-40× to 85×

44 Ld MQFP

Q44.10x10

File Number

3158.4

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143