Datasheet

ManualsBrandsIntersil ManualsDisplay DriversDisplay Driver DIL-40

November 16, 2004

ICM7211AM

4-Digit, LCD Display Driver

The ICM7211AM device is a non-multiplexed four-digit

seven-segment CMOS LCD display decoder-driver.

This device is configured to drive conventional LCD displays

by providing a complete RC oscillator, divider chain,

backplane driver, and 28 segment outputs.

It also has a microprocessor compatible input configuration,

which provides 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 microprocessor

systems, without requiring extensive ROM or CPU time for

decoding and display updating.

The ICM7211AM 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.

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

• Provides 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)

Ordering Information

PART NUMBER

DISPLAY

TYPE

DISPLAY

DECODING

INPUT

INTERFACING

DISPLAY DRIVE

TYPE

TEMP.

RANGE (°C) PACKAGE PKG. DWG. #

ICM7211AMlPL LCD Code B Microprocessor Direct Drive -40 to 85 40 Ld PDIP E40.6

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

1-888-INTERSIL or 321-724-7143

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Data Sheet FN3158.5

Summary of content (8 pages)

PAGE 1
ICM7211AM ® Data Sheet November 16, 2004 FN3158.5 4-Digit, LCD Display Driver Features The ICM7211AM device is a non-multiplexed four-digit seven-segment CMOS LCD display decoder-driver. • Four Digit Non-Multiplexed 7 Segment LCD Display Outputs with Backplane Driver This device is configured to drive conventional LCD displays by providing a complete RC oscillator, divider chain, backplane driver, and 28 segment outputs.
PAGE 2
ICM7211AM Pinout ICM7211AM (PDIP) TOP VIEW VDD 1 40 d1 e1 2 39 c1 g1 3 38 b1 f1 4 37 a1 BP 5 36 OSC a2 6 35 VSS b2 7 34 CHIP SELECT 2 c2 8 33 CHIP SELECT 1 d2 9 32 DIGIT ADRESS BIT 2 e2 10 31 DIGIT ADRESS BIT 1 g2 11 30 B3 f2 12 29 B2 a3 13 28 B1 b3 14 27 B0 c3 15 26 f4 d3 16 25 g4 e3 17 24 e4 g3 18 23 d4 f3 19 22 c4 a4 20 21 b4 Functional Block Diagram DATA INPUTS 2-BIT DIGIT ADRESS INPUT CHIP SELECT 1 CHIP SELECT 2 DATA INPUTS ICM7211AM D4 SEGMENT OUTPUTS D3 SE
PAGE 3
ICM7211AM Absolute Maximum Ratings Thermal Information Supply Voltage (VDD - VSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V Input Voltage (Any Terminal) (Note 1) . . . VSS - 0.3V to VDD , + 0.3V Thermal Resistance (Typical, Note 2) θJA (°C/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C Maximum Storage Temperature Range . . . . . . . . .
PAGE 4
ICM7211AM Input Definitions In this table, VDD and VSS are considered to be normal operating input logic levels. Actual input low and high levels are specified under Operating Characteristics. For lowest power consumption, input signals should swing over the full supply.
PAGE 5
ICM7211AM Description Of Operation Device The ICM7211AM provides outputs suitable for driving conventional four-digit, seven-segment LCD displays. These devices include 28 individual segment drivers, backplane driver, and a self-contained oscillator and divider chain to generate the backplane frequency. The segment and backplane drivers each consist of a CMOS inverter, with the N-Channel and P-Channel devices ratioed to provide identical on resistances, and thus equal rise and fall times.
PAGE 6
ICM7211AM pin 34) are taken low. On the rising edge of either chip select input, the content of the data input latches is decoded and stored in the output latches of the digit selected by the contents of the digit address latches. TABLE 1. OUTPUT CODES (Continued) BlNARY B3 B2 B1 BO 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 CODE B ICM7211AM An address of 00 writes into D4, DA2 = 0, DA1 = 1 writes into D3, DA2 = 1, DA1 = 0 writes into D2, and 11 writes into D1.
PAGE 7
ICM7211AM Typical Application 8 DIGIT LCD DISPLAY ICM7211AM HIGH ORDER DIGITS +5V 20 P10 27 VSS 28 29 2 XTAL1 30 31 32 3 XTAL2 33 4 RESET P17 34 P20 21 7 EA 22 23 24 35 5 SS 80C48 36 µCOMPUTER 37 P27 38 1 TO DB0 12 13 39 T1 14 15 6 INT 16 17 18 DB7 19 40 26 VCC VDD NC INPUT ALE PSEN PROG WR 11 9 25 10 +5V 1 VDD 2, 3, 4 SEGMENTS 6-26 35 VSS 37-40 DATA 36 OSC B0-B3 I/O ICM7211AM LOW ORDER DIGITS BP 5 DS1 DS2 CS1 CS2 27 28 29 30 31 32 33 34 BP 5 DATA B0-B3 2, 3, 4 1 VDD 6-26 SEGMENTS 35 VSS 37-
PAGE 8
This datasheet has been downloaded from: www.DatasheetCatalog.com Datasheets for electronic components.