MLX90720 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – One Button Timer

MLX90720
One Button Timer
Features and Benefits
Flexible timer chip thanks to several
configurations and options
Low cost – minimal external components
Low power consumption guarantees a
long operation life on a low cost
1.5V button cell
COB (Chip-On-Board) package technology
for compact and low cost implementation
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
Temperature Suffix
S
Package
die
Temperature Range
0C to 85C
Functional Diagram
XIN
VDD
VSS
XOUT
90720
Bi
SEGi
Record
memory
Display
driver
CAP1
Timebase
CAP2
Seconds
counter
Min/
Half-min
Control
RELO
Key logic
Sound
BUT1 BUT2
MTST MSEL FST TEST REC BUZ
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.
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22/Aug/98 Rev 1.0 30P/aNgoev1/00