 2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA

www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)

OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany

www.osram-os.com • +49-941-202-7178

1

May 31, 2000-13

The DLO4135/DLG4137

Appnote 28

for industrial control applications. Display construction is filled

reflector type with the integrated circuit in the back also filled

with IC-grade epoxy. This results in a very rugged part which is

resistant to moisture, shock and vibration.

Figure 2. Physical dimensions in inches (mm)

Table 1. DLO4135/DLG4137 pin functions

Pin

Function

Pin

Function

1LT Lamp Test

9

D0 data LSB

2WR Write

10

D1 data

3

BL1 Brightness

11

D2 data

4

BL0 Brightness

12

D3 data

5

No Pin

13

D4 data

6

No Pin

14

D5 data

7CE Chip Enable

15

D6 data MSB

8

GND

16

.043

(1.09)

.065 typ.

(.165)

.012

(.30)

.100

(2.54)

.300

(7.62)

.43

(10.92)

.235

(5.97)

.30

(7.62)

.100

(2.54)

.500 max.

(12.7)

DLO4135 Z

1.00 max.

(25.4)

EIA date

code

Luminous

intensity code

Device marking

begins over pin 1

.14 min.

(3.56)

.310

(7.87)

.310

(7.87)

.100 (2.54) typ.

0.18 ± .02

(4.57) (.51)

.100 (2.54)

This application note is intended to serve as a design and appli-

cation guide for users of the DLO4135 and DLG4137 OSRAM

Intelligent Displays. This appnote covers device electrical

description, operation, general circuit design considerations,

and interfacing to microprocessors.

Electrical Description

The DLO4135/DLG4137 Intelligent Alphanumeric 5x7 Dot

Matrix Display contains memory, character generator, multi-

plexing circuits, and drivers built into a single package.

Figure 1 is a block diagram of DLO4135/DLG4137. The unit

consists of 35 LED die arranged in a 5x7 pattern and a single

CMOS integrated circuit chip. The IC chip contains the column

drivers, row drivers, 128 character generator ROM, memory,

multiplex and blanking circuitry.

Figure 1. DLO4135/DLG4137 block diagram

Thirty-five dots form a 0.30 x 0.43 inch overall character size in

a.500 x 1.00 inch dual-in-line package. The ±50 degree wide

viewing angle complements the display and is the ideal display

D0

D1

D2

D3

D4

D5

D6

Multiplex

Circuitry

Column

Driver

Character

ROM

ROW

Driver

WR

CE

BL0 BL1 LT