R
EM MICROELECTRONIC -
MARIN SA
H1344
CMOS Circuit for Analog Quartz Clocks with Bipolar
Stepping Motor Drive
Description
The H 1344 is a low power 32Khz analog clock integrated
circuit designed in HCMOS technology to drive a bipolar
stepping motor. A set of capacitors is provided on chip to be
connected, in any combination, to the two oscillator
terminals, with a maximum total capacitance of 48
p
F. Both
the motor pulse period and the motor pulse width are mask-
programmable.
See page 6 for already available options.
Features
!
!
!
!
!
!
!
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32kHz quartz oscillator
Integrated capacitors, mask selectable
Single battery operation
0.7
µA
typical current consumption
Low resistance outputs for bipolar stepping motor
Mask options for pad designation, motor period and
pulse width, alarm frequency, modulation and duty
cycle
Alarm output function compatible with either NPN or
PNP-driver transistors
Alarm input function
1024Hz output on AL
IN
pad for oscillator frequency
verification
Fast test function
ESD protected terminals
Applications
!
Analog clocks
Functional Diagram
Pin Assignment
V
DD
1
2
3
4
8
7
6
5
1.5V
+
C
TR
1
2
3
4
Motor
M
H1344
V40
V41
V47
V143
OSC
IN
OSC
OUT
ALARM
OUT
MOT
1
V
SS
MOT
2
8
H1344
V40
V41
V47
ALARM
IN
7
6
5
V
DD
V
SS
MOT
2
Fig. 1
1
2
3
4
8
Alarm Output
OSC
OUT
OSC
IN
ALARM
OUT
MOT
1
H1344
V38
7
6
5
ALARM
IN
Fig. 2
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H1344
Absolute Maximum Ratings
Parameter
Supply voltage range
Input voltage
Storage temperature
Symbol
V
DD
–V
SS
V
IN
T
STOR
Min.
-0.3
V
SS
-55
Max.
+5
V
DD
+125
Units
V
V
°C
Recommended Operating Conditions
Parameter
Ambient temperature
Quartz frequency
Quartz series resistance
Motor coil resistance
Positive supply
Negative supply
Symbol
T
F
Q
R
Q
R
M
V
DD
V
SS
Value
25
32768
30
200
1.55
0
Units
°C
Hz
kΩ
Ω
V
V
Table 1
Stresses beyond these listed maximum ratings may cause
permanent damage to the device. Exposure to conditions
beyond specified operating conditions may affect device
reliability or cause malfunction.
Table 2
Operating Conditions
Parameter
Operating temperature
Quartz series resistance
Trimmer capacitance
Symbol
T
OPR
C
TR
Min.
-20
1.5
Typ.
30
Max.
+70
50
30
Units
°C
kΩ
pF
Handing Procedures
This device contains circuitry to protect the terminals
against damage due to high static voltages or electrical
fields. However, it is advised that normal precautions be
taken to avoid application of any voltage higher than
maximum rated voltages to this circuit.
Table 3
Electrical and Switching Characteristics
at recommended operating conditions (valid unless otherwise specified)
Parameter
Supply voltage
Supply current
Motor Output
Current into load
Pulse period
Pulse width
Alarm Output
Frequency
Modulation
Cycle time
Pulse duration
Output current for
driving NPN-transistor
Output current for
driving PNP-transistor
Alarm Input
Test In/Output
Alarm input delay
Test frequency
Input current (alarm)
Input current
Oscillator
Build-up time
Stability against
voltage variation
Output capacitance
Input capacitance
∗
Symbol
V
DD
I
DD
Test
operating
without, AL
IN
open
V
DD
= 1.2V, R
M
=200Ω
Min.
+1.1
Typ.
0.7
Max.
+1.8
2.0
Units
V
µA
mA
s
ms
Hz
Hz
s
s
µA
mA
mA
µA
I
M
T
1
t
w
f
A
f
A1
t
2
t
P
I
ALOUTN
I
ALOUTN
I
ALOUTN
I
ALOUTN
±4.0
Mask option
∗
Mask option
∗
Mask option
∗
Mask option
∗
Mask option
∗
Mask option
∗
V
DD
=1.2V, V
OL
= 0.2V
V
DD
=1.2V, V
OH
= 0.7V
V
DD
=1.2V, V
OL
= 0.5V
V
DD
=1.2V, V
OH
= 1.0V
0.5
0.3
0.3
0.5
t
ALD
f
T
I
IN
I
IN
t
START
supply
C
OUT
C
IN
125
Input at V
SS
, V
DD
= 1.4V
Input at V
DD
V
DD
= 1.2V
1.1V≤V
DD
≤1.8V
5
Mask option
∗
Mask option
∗
-1
1
1024
-5
15
570
-10
30
2
12
ms
Hz
µA
µA
s
ppm/V
pF
pF
!f
!
V
DD
xf
Table 4
: See “Available options” on page 6.
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H1344
Timing Waveforms
Motor Output Waveform
V
DD
MOT
1
V
SS
t
w
V
DD
MOT
2
V
SS
T
1
Fig. 3
Alarm Output Waveform
1024 Hz
2048 Hz
AL
IN
t
ALD
AL
OUT
t
P
T
2
1
f
A1
Fig. 4
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H1344
Functional Description
Oscillator and Frequency Divider
The quartz oscillator consists of an inverter, internal
feedback resistance to bias the input and integrated
capacitors. The values of the integrated capacitors are
selectable by metal mask. The oscillator is designed for
32768Hz.
Motor Drive Output
The circuit contains two push-pull output buffers for driving
bipolar stepping motors. Between two pulses, both P-
channel transistor of the other buffer are conducting. The
outputs are protected against inductive voltage spikes with
diodes to both supply pins.
Both the motor pulse period and motor pulse width are
programmable by metal mask over a wide range of values
(see page 6 for available options).
Alarm Output
The alarm is activated by connecting ALARM
IN
to V
SS
and is
deactivated by opening the connection. A metal mask
option is available to program a continuous activation of the
alarm output.
The alarm output driver contains a push-pull output buffer
to drive an external sound source by means of an external
bipolar transistor. A metal mask option is available to allow
the use of NPN or PNP-transistors.
The tone frequency, modulation frequency, modulation
frequency and cycle time (ON/OFF time) are metal mask
selectable.
Test Mode
The ALARM
IN
pin fulfills three functions:
a) For normal operation, the ALARM
IN
pin is left open.
The circuit provides a square wave signal of 1024Hz,
which can be used to tune the oscillator.
b) If the pin is connected to V
SS
, the alarm signal is
provided at pin 6.
c) If the ALARM
IN
pin is connected to V
DD
, all output
frequencies are increased by a factor of 64, the alarm
modulation of f
A1
= 8Hz and f
A
= 2kHz are suppressed.
Test configuration
1.5V
+
C
TR
1
H1344
V40
V41
3
V47
8
7
6
5
Alarm Output
2
Test
4
R
M
Operating range of trimmer
Capacitance: 1.5 pF
≤
C
TR
≤
30 pF
Fig. 5
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H1344
Pad Location Diagram
All dimensions in
µ
m
0
1000
V
DD
OSC
IN
978
795
V
SS
OSC
OUT
702
H1344
v40
v41
v47
231
MOT
2
AL
OUT
304
0
276
AL
IN
MOT
1
28
0
1270
1000
0
905
192
V
DD
OSC
OUT
978
795
V
SS
OSC
IN
702
H1344
v05
v56
v38
231
MOT
2
AL
OUT
304
0
276
AL
IN
MOT
1
28
0
1270
Chip size:
1270 x 1499 microns
50 x 59 mils
Fig. 6
Copyright © 2004, EM Microelectronic-Marin SA
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192
1499
1499
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