900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






EM Microelectronic

EM1537 Datasheet Preview

EM1537 Datasheet

Low-Power CMOS

No Preview Available !

R
EM MICROELECTRONIC - MARIN SA
EM1537
Low Power 32 kHz Circuit for Analog Quartz Watches
Description
The EM1537 is an integrated circuit in a low power CMOS
technology for battery operated wristwatches with bipolar
stepping motors. Time base is a 32 kHz crystal oscillator.
It has a very low current consumption of typ. 100 nA in a
wide voltage range of 1.2 to 3.6 Volt.
The IC is available in two voltage ranges - 1.2 to 1.8 Volt
and 1.8 to 3.6 V.
Motor pulse width is programmable from 0.098 ms to
14.65 ms in steps of 0.98 ms by metal mask.
Motor period is programmable from 2 x 1s to 2 x 60 s in
steps of 1 s selectable by metal mask.
Motor pulse chopping is programmable from 1/8 to 8/8 in
steps of 1/8 with chopping frequencies of 1024 Hz or 2048
Hz selectable by metal mask.
Motor period in Motor test mode is selectable 2 x 31.25
ms or 2 x 62.5 ms by metal mask
Input and output capacitors are integrated on chip and
also programmable by metal mask.
With a fully debounced RESET pad the motor can be
stopped.
A multi-functional bidirectional pad MTEST acts as output
for a 32 Hz or 512 Hz for frequency tuning - if open, or – if
connected to Vp – accelerates the motor period by a
factor of 16 or 32.
Features
ƒ Low power 32 kHz Quartz oscillator
ƒ Operating voltage ranges 1.55V and 3 Volt.
ƒ Very low current consumption typ. 100 nA at 1.5V.
ƒ Motor pulse width motor period and motor pulse
chopping is programmable in a wide range by metal
mask and don’t require additional bonds.
ƒ Fully debounced RESET input for accurate time setting
and power saving during shelf life.
ƒ Integrated capacitors, mask selectable is steps of 1 pF up to
35 pF.
ƒ Operation temperature range: -10°C to +60°C
ƒ Available in chip form, SO8 package
Applications
ƒ Analog watches
ƒ Driver for bipolar stepping motors
Functional Diagram
Vn
RESET
Vn
RESET
VP
VP
MOT1
CTR
H1537
OSCIN
MOT2
Rm
(Stepping Motor)
OSCOUT
VP
VP
Operating range of Trimmer Capacitance:
3pF CTR 30 pF
Copyright © 2006, EM Microelectronic-Marin SA
1
10/06 – rev.A
www.emmicroelectronic.com




EM Microelectronic

EM1537 Datasheet Preview

EM1537 Datasheet

Low-Power CMOS

No Preview Available !

R
EM1537
Current Versions
Version
Supply
voltage
(V)
016 1.55
017 1.55
020 1.55
021 1.55
026 1.55
058 1.55
Period
(s)
2x1
2x5
2 x 20
2x1
2x20
2 x 10
Motor output
Pulse Chop. Chop.
width ratio
freqy
(ms)
(Hz)
5.859 8/8
0
5.859 8/8
0
5.859 8/8
0
4.883 8/8
0
6.836 8/8
0
4.883 8/8
0
Fast
mode
(ms)
2 x 62.5
2 x 62.5
2 x 62.5
2 x 62.5
2 x 31.25
2 x 31.25
Integrated Capa
Cin
Cout
(pF)
(pF)
2
14
4
14
2
14
2
14
4
14
2
25
Test
Fast
test
(Hz)
512
512
512
512
512
512
Pad options
Pad 2 Pad 8
MTEST
MTEST
MTEST
MTEST
MTEST
RESET
RESET
RESET
RESET
RESET
RESET
MTEST
Metal options
Parameter
Min
Max
Resolution
Unit
Supply voltage
(1.2 to 1.8) or (1.8 – 3.6)
V
Motor pulse period
2x1
2 x 60
2x1
s
Motor pulse width
0.977
14.65
0.977
ms
Chopping ratio
1/8
8/8
1/8
1
Chopping frequency
1024 or 2048
Hz
Fast mode period
2 x 31.25 or 2 x 62.5
ms
Cin
2
35 - Cout
1
pF
Cout
2
35 - Cin
1
pF
Fast test
32 or 512
Hz
Pad 2
MTEST or RESET
Pad 8
RESET or MTEST
Description
Motor period in Test mode
Internal capacitor on OSCIN
Internal capacitor on OSCOUT
Test frequency on MTEST
Block Diagram
OSCIN 3
4
OSCOUT
RESET 8
OSCILLATOR
32768Hz
DIVIDER
CHAIN
MASTER
RESET
V
S
S
DIVIDER
CHAIN 2
FAST MODE
32Hz OUTPUT
2 MTEST
MOTOR
CONTROL
6 MOT1
7 MOT2
Copyright © 2006, EM Microelectronic-Marin SA
2
10/06 – rev.A
www.emmicroelectronic.com


Part Number EM1537
Description Low-Power CMOS
Maker EM Microelectronic
PDF Download

EM1537 Datasheet PDF






Similar Datasheet

1 EM1537 Low-Power CMOS
EM Microelectronic





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy