AY0438/L Microchip Technology, AY0438/L Datasheet

IC LCD DRIVER CMOS 32SEG 44PLCC

AY0438/L

Manufacturer Part Number
AY0438/L
Description
IC LCD DRIVER CMOS 32SEG 44PLCC
Manufacturer
Microchip Technology
Datasheets

Specifications of AY0438/L

Display Type
LCD
Configuration
32 Segment
Interface
Parallel
Digits Or Characters
16 Characters
Current - Supply
25µA
Voltage - Supply
3 V ~ 8.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
44-PLCC
Supply Current
25µA
No. Of Digits / Alpha
16
No. Of Segments
32
Meter Display Type
LCD
Interface Type
Serial
Supply Voltage Range
3V To 8.5V
Driver Case Style
LCC
No. Of Pins
44
Number Of Segments
32
Maximum Clock Frequency
1.5 MHz
Operating Supply Voltage
3 V to 8.5 V
Maximum Power Dissipation
250 mW
Maximum Operating Temperature
+ 70 C
Maximum Supply Current
60 uA
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
AYO438/L

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AY0438/L
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
AY0438/L
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
AY0438/L001
Quantity:
28
FEATURES
• Drives up to 32 LCD segments of arbitrary config-
• CMOS process for: wide supply voltage range,
• CMOS and TTL-compatible inputs
• Electrostatic discharge protection on all pins
• Cascadable
• On-chip oscillator
• Requires only three control lines
APPLICATIONS
• Industrial displays
• Consumer product displays
• Telecom product displays
• Automotive dashboard displays
DESCRIPTION
The AY0438 is a CMOS integrated device that drives a
liquid crystal display, usually under microprocessor
control. The part acts as a smart peripheral that drives
up to 32 LCD segments. It needs only three control
lines due to its serial input construction. It latches the
data to be displayed and relieves the microprocessor
from the task of generating the required waveforms.
The AY0438 can drive any standard or custom parallel
drive LCD display, whether it be field effect or dynamic
scattering; 7-, 9-, 14- or 16-segment characters; deci-
mals; leading + or -; or special symbols. Several
AY0438 devices can be cascaded. The AC frequency
of the LCD waveforms can either be supplied by the
user or generated by attaching a capacitor to the LCD
input, which controls the frequency of an internal oscil-
lator.
The AY0438 is available in 40-lead dual in-line plastic
and 44-lead PLCC packages. Unpackaged dice are
also available.
uration
low- power operation, high-noise immunity, wide
temperature range
1995 Microchip Technology Inc.
32-Segment CMOS LCD Driver
PIN CONFIGURATION
SEG 29
SEG 28
SEG 27
SEG 26
SEG 25
SEG 24
SEG 23
SEG 22
SEG 21
SEG 20
SEG 19
SEG 32
SEG 31
SEG 30
SEG 29
SEG 28
SEG 27
SEG 26
SEG 25
SEG 24
SEG 23
SEG 22
SEG 21
SEG 20
SEG 19
SEG 18
SEG 17
SEG 16
SEG 15
44 PLCC
40-Lead Dual In-line
LOAD
V
DD
10
11
12
13
14
15
16
17
7
8
9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
AY0438
AY0438
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
39
38
37
36
35
34
33
32
31
30
29
DS70010I-page 1
CLOCK
SEG 1
SEG 2
SEG 3
V
DATA OUT
DATA IN
SEG 4
SEG 5
LCD
BP
SEG 6
SEG 7
SEG 8
SEG 9
SEG 10
SEG 11
SEG 12
SEG 13
SEG 14
SS
NC
DATA OUT
DATA IN
SEG 4
SEG 5
LCD
BP
SEG 6
SEG 7
SEG 8
NC

Related parts for AY0438/L

AY0438/L Summary of contents

Page 1

... LCD input, which controls the frequency of an internal oscil- lator. The AY0438 is available in 40-lead dual in-line plastic and 44-lead PLCC packages. Unpackaged dice are also available. 1995 Microchip Technology Inc. AY0438 PIN CONFIGURATION 40-Lead Dual In-line V 1 ...

Page 2

... Description Supply voltage Latch data from registers Direct drive outputs Backplane drive output Backplane drive input Data input to shift register Ground System clock input OUTPUT 32 SEG with the Backplane output 1995 Microchip Technology Inc. ...

Page 3

... Data in 32-bit Static Shift Register Clock Load 32 Segment Drivers LCD LCD AC Generator Clock Load FIGURE 7: CASCADE TIMING DIAGRAM CLOCK START Data in Data out Load 1995 Microchip Technology Inc. FIGURE 5: OSCILLATOR FREQUENCY 140 120 100 80 (Figure 6 and Data Data out in Clock Load ...

Page 4

... PIC16CXX device. This code was complied using MPASM. SEG A AY0438 SEG1 SEG F A SEG7 SEG SEG6 SEG E E SEG5 D SEG D SEG4 SEG C SEG3 SEG B Clock SEG2 Data In SEG9-15 Load SEG19-23 SEG25-31 Backplane LCD --> seg1 to seg7 --> seg9 to seg15 --> seg17 to seg 23 LCD Backplane 1995 Microchip Technology Inc. ...

Page 5

... DecodeValue table must reside in page 0 for this program to work ; DecodeValue addwf PCL retlw B'00111111' retlw B'00000110' retlw B'01011011' retlw B'01001111' retlw B'01100110' retlw B'01101101' 1995 Microchip Technology Inc. to determine the values to be ;decode for 0 ;decode for 1 ;decode for 2 ;decode for 3 ;decode for 4 ;decode for 5 AY0438 DS70010I-page 5 ...

Page 6

... DATAIN is low ;rotate value through carry ;if bit clear then skip ;else set data bit ;toggle clock ; / ;see if 8 done ;no then do all ;else return 1995 Microchip Technology Inc. ...

Page 7

... LCD Input Leakage I TABLE 3: AC CHARACTERISTICS Characteristics Sym Clock Rate f Data Set-up Time t DS Data Hold Time t DH Load Pulse Width t PW Data Out Prop. Delay t PD 1995 Microchip Technology Inc +85 C Min Typ Max +3.0 — +8.5 DD — — 0.5 V — ...

Page 8

... AY0438 NOTES: DS70010I-page 8 1995 Microchip Technology Inc. ...

Page 9

... Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. For latest version information and upgrade kits for Microchip Development Tools, please call 1-800-755-2345 or 1-602-786-7302. DS70010I-page Plastic DIP L = PLCC S = Die in Waffle Pack - = 0˚C to +70˚C = 40˚C to +85˚ Segment LCD Driver 1995 Microchip Technology Inc. ...

Page 10

... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system ...

Page 11

... Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...

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