MLX90720 ETC1 [List of Unclassifed Manufacturers], MLX90720 Datasheet

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MLX90720

Manufacturer Part Number
MLX90720
Description
One Button Timer
Manufacturer
ETC1 [List of Unclassifed Manufacturers]
Datasheet
Features and Benefits
Flexible timer chip thanks to several
Low cost – minimal external components
Low power consumption guarantees a
COB (Chip-On-Board) package technology
Accurate timing based on low power crystal oscillator
Output for driving an external transistor
Applications
Autonomous kitchen timer
Parking timing reminder key ring
Ordering Information
Part No.
MLX90720
Functional Diagram
MLX902xx Name of Sensor
MLX90720 One Button Timer
CAP1
CAP2
VDD
BUT1
VSS
XIN
Timebase
configurations and options
long operation life on a low cost
1.5V button cell
for compact and low cost implementation
Key logic
BUT2
XOUT
Temperature Suffix
S
MTST
Seconds
counter
90720
Control
MSEL
memory
Record
FST
TEST
Bi
Half-min
Min/
Display
REC
driver
Sound
SEGi
RELO
BUZ
Rev Y.X
Package
die
Page 1
Description
The electronic timer device is powered by a 1.5V
button cell, is programmable from 0 to 99 minutes,
with 2 beep cycles at the end of countdown. The
countdown mode is indicated with a blinking display.
The timer is provided with an internal memory that
allows the memorization of the last programmed
time. The chip automatically enters sleep mode when
not in use. The device can be used in several
configurations and has several options, which are
described below.
The chip is designed to be used with a dual
backplane LCD.
The timer chip has an output ( RELO ) for driving an
external low power NPN bipolar transistor. This
transistor could be used for driving a switching
element (relay). It can be connected directly (base to
RELO) or through a resistor from 100 to 200 ohms.
Temperature Range
0C to 85C
22/Aug/98
One Button Timer
MLX90720
Rev 1.0
30/Nov/00
Page 1

Related parts for MLX90720

MLX90720 Summary of contents

Page 1

... Control Key logic BUT1 BUT2 MTST MSEL FST MLX902xx Name of Sensor MLX90720 One Button Timer Package Temperature Range die 0C to 85C Description The electronic timer device is powered by a 1.5V button cell, is programmable from minutes, with 2 beep cycles at the end of countdown. The ...

Page 2

... Configuration 3: Minutes mode (c) : countdown in minutes with a 0.5 min. step from 10 min to 1 min and the last minute in seconds. MLX90720 One Button Timer Configuration 4: Seconds mode. Options In each configuration two options are possible: the restore memory option and the second fast increment option ...

Page 3

... Power down mode: When the chip enters in this mode the oscillator and the display are disabled and the current consumption MLX902xx Name of Sensor MLX90720 One Button Timer One Button Timer is minimized. Note that waiting mode is not available. OBT with second fast ...

Page 4

... LSD per second. The timer can switch back and forth between single and fast increment mode. When exceeding 99 minutes the timer jumps to 00 minutes. MLX90720 One Button Timer MLX90720 One Button Timer During the programming mode, reset is not available. ...

Page 5

... If no button is pressed for more than 2 seconds and the display is not at 00 the chip enters countdown MLX902xx Name of Sensor MLX90720 One Button Timer One Button Timer mode. When 00 is displayed and no button has been pressed for more than 45 sec. the chip enters power down mode ...

Page 6

... This means that the LCD is always displaying seconds, programming and countdown is always in steps of 1 second, and the maximum time that can be programmed is 99 seconds. MLX90720 One Button Timer MLX90720 One Button Timer Page 6 Rev 1.0 ...

Page 7

... LCD Segment 7 driver B0 output LCD Backplane 0 driver B1 output LCD Backplane 1 driver MTST input Configuration input 1 REC input One/two button selection BUT1 input Button 1 input MLX902xx Name of Sensor MLX90720 One Button Timer BP0 - BP1 Name Type FST input ...

Page 8

... Parameter Symbol Buzzer frequency Fbuz Buzzer voltage Vbuz MLX90720 One Button Timer 1.2V to 1.7V (unless otherwise specified Test Conditions VDD = 1.5V VDD = 1.5V, buzzer output not loaded Test Conditions VDD = 1.5V Test Conditions VDD = 1.2V ...

Page 9

... VDD VSS restore function active second fast increment not active Applications Example: Two button timer in configuration 3 BUT1 BUT2 REC VDD VSS second fast increment active MLX90720 One Button Timer MLX902xx Name of Sensor LCD XIN XOUT B0-1 SEG0-7 CAP1 90720 CAP2 RELO FST ...

Page 10

... Fax: +44 1428 751 603 E-mail: sales_uk@melexis.com Germany Am Seestern 8, 40547 Düsseldorf, Germany Phone: +49 211 5360212 Fax: +49 211 5360250 E-mail: sales_de@melexis.com MLX90720 One Button Timer One Button Timer Use Template: package.vst France Melexis France Tour Arago, 5 rue Bellini, 92806 Puteaux-La-Défense, France. Phone: + Fax: + E-mail: sales_france@melexis ...

Page 11

... MLX902xx Name of Sensor MLX90720 One Button Timer One Button Timer Rev Y.X Page 11 22/Aug/98 MLX90720 Rev 1.0 30/Nov/00 Page 11 ...

Page 12

... MLX90720 One Button Timer MLX90720 One Button Timer Page 12 Rev 1.0 30/Nov/00 ...

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