|
|
PDF LM2444 Data sheet ( Hoja de datos )
| Número de pieza | LM2444 | |
| Descripción | 4 LINE x 40 CHARACTERS LCD MODULE | |
| Fabricantes | DENSITRON | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM2444 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
These drawings and specifications are
the property of Densitron Corporation
and may not be reproduced, copied or
used without written permission
REV.
A E0541
REVISIONS
DESCRIPTION
DATE
APPROVED
1. Specification subject to change without notice.
2. All dimensions and specifications apply to standard modules. This information may vary for modules with optional
features.
3. All dimensions are in millimeters.
4. Precautions:These precautions apply equally to modules from all makers, not just Densitron. Violation of these
guidelines may void the warranty and can cause problems ranging from erratic operation to catastrophic display
failure.
Handling precautions:
♦ This device is susceptible to Electro-Static Discharge (ESD) damage. Observe Anti-Static precautions.
Power supply precautions:
♦ Identify and, at all times, observe absolute maximum ratings for both logic and LC drivers. Note that there is some
variance between models.
♦ Prevent the application of reverse polarity to VDD and VSS, however briefly.
♦ Use a clean power source free from transients. Power up conditions are occasionally “jolting” and may exceed the
maximum ratings of the module.
♦ The +5V power of the module should also supply the power to all devices which may access the display. Don’t
allow the data bus to be driven when the logic supply to the module is turned off.
♦ DO NOT install a capacitor between the VO (contrast) pin and ground. VDD must, at all times, exceed the VO
voltage level. The capacitor combines with the contrast potentiometer to form an R-C network which “holds-up” VO,
at power-down, possibly damaging the module.
Operating precautions:
♦ DO NOT plug or unplug the module when the system is powered up.
♦ Minimize the cable length between the module and host MPU. (Recommended max. length 30 cm).
♦ For models with EL backlights, do not disable the backlight by interrupting the HV line. Unloaded inverters produce
voltage extremes which may arc within a cable or at the display.
♦ Operate the module within the limits of the modules temperature specifications.
Mechanical / Environmental precautions:
♦ Improper soldering is the major cause of module difficulty. Use of flux cleaner is not recommended as they may
seep under the elastomeric connection and cause display failure. Densitron recommends the use of Kester “245”
no-clean solder.
♦ Mount the module so that it is free from torque and mechanical stress.
♦ Surface of LCD panel should not be touched or scratched. The display front surface is an easily scratched, plastic
polarizer. Avoid contact and clean only when necessary with soft, absorbent cotton dampened with petroleum
benzene.
♦ ALWAYS employ anti-static procedure while handling the module.
♦ Prevent moisture build-up upon the module and observe the environmental constraints for storage temperature and
humidity.
♦ DO NOT store in direct sunlight.
♦ If leakage of the liquid crystal material should occur, avoid contact with this material, particularly ingestion. If the
body or clothing becomes contaminated by the liquid crystal material, wash thoroughly with water and soap.
Notes: (unless otherwise specified)
Unless otherwise
APPROVALS
specified:
DRAWN
Dimensions are mm
Tolerances are: CHECKED
X=±3
.X = ± 0.5
.XX = ± 0.05
ISSUED
DATE
TITLE
DENSITRON CORPORATION
TORRANCE, CA
4 LINE X 40 CHARACTERS LCD MODULE
DWG. NO.
LM2444
SHEET 1 OF 8
1 page  
10.0 TIMING CHARACTERISTICS
Item
Enable cycle time
Enable pulse width
Enable rise / fall time
Address set-up time
Address hold time
Data delay time
Data hold time (Write)
Data hold time (Read)
Data set-up time
Symbol
TcycE
PWEH
tEr/tEf
tAS
tAH
tDDR
tDHW
tDHR
tDSW
Min.
500
230
-
40
10
-
10
5
80
Typ.
-
-
-
-
-
-
-
-
-
Max.
-
-
20
-
-
160
-
-
-
Unit
nS
nS
nS
nS
nS
nS
nS
nS
nS
WRITE OPERATION
READ OPERATION
RS
R/W
E
DB0
to
DB7
V IH V IH
V IL V IL
t AS t AH
V IL
V IL
t Er
PW EH
t Ef
V IH V IH
t DSW
V IL
t AH
V IL
tH
VIH Valid VIH
V IL Data V IL
t cycE
V IL
RS
R/W
E
DB0
to
DB7
V IH
V IL
t AS
V IH
V IH
V IL
t AH
V IH
V IL
t Er
PW EH
t Ef
V IH V IH
t DDR
t AH
V IL
t DHR
VOH Valid VOH
V OL Data V OL
t cycE
V IL
11.0 DD RAM ADDRESS vs. DISPLAY POSITION
Character 1 2 3 4 5 6 7 8 9 10 11 --- 38 39 40
Line 1 *
00 01 02 03 04 05 06 07 08 09 0A --- 25 26 27
Line 2 *
40 41 42 43 44 45 46 47 48 49 4A --- 65 66 67
Line 3 **
Line 4 **
00 01 02 03 04 05 06 07 08 09 0A
40 41 42 43 44 45 46 47 48 49 4A
---
---
25 26 27
65 66 67
* - Controller 1 (E1)
** - Controller 2 (E2)
DWG. NO.
LM2444
SHEET 5 OF 8
REV.
A
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LM2444.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM2444 | 4 LINE x 40 CHARACTERS LCD MODULE | DENSITRON |
| LM2444-14 | FOUR DIGIT DISPLAY |  Ledtech |
| LM2445 | Monolithic Triple 7.5 ns CRT Driver |  National Semiconductor |
| LM2445 | LM2445 Monolithic Triple 7.5 ns CRT Driver (Rev. B) |  Texas Instruments |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |