9-6

August 1997

ICM7211, ICM7212

4-Digit, ICM7211 (LCD) and

ICM7212 (LED) Display Drivers

Features ICM7211 (LCD)

• 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

• ICM7211 Devices Provide Separate Digit Select Inputs to

Accept Multiplexed BCD Input (Pinout and Functionally

Compatible with Siliconix DF411)

• ICM7211M Devices Provide Data and Digit Address

Latches Controlled by Chip Select Inputs to Provide a

Direct High Speed Processor Interface

• ICM7211 Decodes Binary to Hexadecimal; ICM7211A

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

• ICM7211A Available in Surface Mount Package

Features ICM7212AM (LED)

• 28 Current-Limited Segment Outputs Provide 4-Digit

Non-Multiplexed Direct LED Drive at >5mA Per Segment

• Brightness Input Allows Direct Control of LED

Segment Current with a Single Potentiometer or

Digitally as a Display Enable

• ICM7212AM Device Provides Same Input Configuration

and Output Decoding Options as the ICM7211AM

Description

The ICM7211 (LCD) and ICM7212 (LED) devices constitute

a family of non-multiplexed four-digit seven-segment CMOS

display decoder-drivers.

The ICM7211 devices are configured to drive conventional

LCD displays by providing a complete RC oscillator, divider

chain, backplane driver, and 28 segment outputs.

The ICM7212 devices are configured to drive common-

anode LED displays, providing 28 current-controlled, low

leakage, open-drain N-Channel outputs. These devices

provide a brightness input, which may be used at normal

logic levels as a display enable, or with a potentiometer as a

continuous display brightness control.

These devices are available with multiplexed or microproces-

sor 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 ICM7217, ICM7226, and ICL7135. The

microprocessor versions provide data input latches and Digit

Address latches under control of high-speed Chip Select

inputs. These devices simplify the task of implementing a

cost-effective alphanumeric seven-segment display for micro-

processor systems, without requiring extensive ROM or CPU

time for decoding and display updating.

The standard devices will provide two different decoder

configurations. The basic device will decode the four bit

binary inputs into a seven-segment alphanumeric hexadeci-

mal output. The “A” versions will provide the “Code B” output

code, i.e., 0-9, dash, E, H, L, P, blank. Either device will cor-

rectly 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.

ICM7211lPL

LCD

Hexadecimal

Multiplexed

Direct Drive

-40 to 85

40 Ld PDIP

E40.6

ICM7211MlPL

LCD

Hexadecimal

Microprocessor

Direct Drive

-40 to 85

40 Ld PDIP

E40.6

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

ICM7211AlM44

LCD

Code B

Multiplexed

Direct Drive

-40 to 85

44 Ld MQFP

Q44.10x10

ICM7211AMlM44

LCD

Code B

Microprocessor

Direct Drive

-40 to 85

44 Ld MQFP

Q44.10x10

ICM7212AMlPL

LED

Code B

Microprocessor

Common Anode

-40 to 85

40 Ld PDIP

E40.6

File Number

3158.1

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

http://www.intersil.com or 407-727-9207