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EM MICROELECTRONIC - MARIN SA
H1344
CMOS Circuit for Analog Quartz Clocks with Bipolar
Stepping Motor Drive
Description
The H1344 is a low power 32kHz analog clock integrated
circuit designed in CMOS 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 48pF. Both
the motor pulse period and the motor pulse width are mask-
programmable (see page 6 for already available options).
For versions v143 and v221, the TEST1 and TEST2 pins
are only for test and must not be used in the application.
Applications
Stepper Motor Driver for time-switches
Analog clocks
Functional Diagram
1.5V +
CTR
1
H1344
2 V40
V41
3 V47
8
7
6
45
Motor
M
Alarm Output
Features
32kHz quartz oscillator
Integrated capacitors, mask selectable
Single battery operation
0.7 A 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 ALIN pad for oscillator frequency
verification
Fast test function
ESD protected terminals
Pin Assignment
VDD 1
VSS 2
MOT2 3
ALARMIN 4
H1344
V40
V41
V47
8 OSCIN
7 OSCOUT
6 ALARMOUT
5 MOT1
VDD 1
VSS 2
MOT2 3
TEST1 4
H1344
V143
V221
8 OSCIN
7 OSCOUT
6 TEST2
5 MOT1
1.5V +
CTR
18
2 H1344 7
V143
3 V221 6
45
Motor
M
VDD 1
VSS 2
MOT2 3
ALARMIN 4
H1344
V38
8 OSCOUT
7 OSCIN
6 ALARMOUT
5 MOT1
Fig. 2
Fig. 1
Copyright 2016, EM Microelectronic-Marin SA
1344-DS, Version 2.1, 04/2017
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Absolute Maximum Ratings
Parameter
Symbol
Min.
Max. Units
Supply voltage range
VDD VSS
-0.3
+5
V
Input voltage
VIN VSS VDD V
Storage temperature
TSTOR
-55 +125 °C
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.
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.
H1344
Recommended Operating Conditions
Parameter
Ambient temperature
Quartz frequency
Quartz series resistance
Motor coil resistance
Positive supply
Negative supply
Symbol
T
FQ
RQ
RM
VDD
VSS
Value
25
32768
30
200
1.55
0
Units
°C
Hz
kΩ
V
V
Table 2
Operating Conditions
Parameter
Symbol Min. Typ. Max. Units
Operating temperature TOPR
Quartz series resistance
Trimmer capacitance
CTR
-20
30
1.5
+70
50
30
°C
kΩ
pF
Table 3
Electrical and Switching Characteristics
at recommended operating conditions (valid unless otherwise specified)
Parameter
Symbol
Supply voltage
Supply current
Motor Output
Current into load
Pulse period
Pulse width
VDD
IDD
IM
T1
tw
Alarm Output
Frequency
Modulation
Cycle time
Pulse duration
Output current for
driving NPN-transistor
Output current for
driving PNP-transistor
fA
fA1
T2
tP
IALOUTN
IALOUTN
IALOUTN
IALOUTN
Alarm Input
Test In/Output
Alarm input delay
Test frequency
Input current (alarm)
Input current
tALD
fT
IIN
IIN
Oscillator
Build-up time
Stability against
voltage variation
Output capacitance
Input capacitance
supply
tSTART
Δf
Δ VDD x f
COUT
CIN
See “Available options” on page 6.
Test
operating
without motor, ALIN open
Min.
+1.1
VDD = 1.2V, RM=200Ω
±4.0
VDD = 1.2V, VOL = 0.2V
VDD = 1.2V, VOH = 0.7V
VDD = 1.2V, VOL = 0.5V
VDD = 1.2V, VOH = 1.0V
0.5
0.3
0.3
0.5
Input at VSS, VDD = 1.4V
Input at VDD
VDD = 1.2V
1.1VVDD1.8V
125
-1
1
Typ.
0.7
Mask option
Mask option
Mask option
Mask option
Mask option
Mask option
1024
-5
15
5
Mask option
Mask option
Max.
+1.8
2.0
Units
V
A
mA
s
ms
Hz
Hz
s
s
A
mA
mA
A
570 ms
Hz
-10 A
30 A
2s
12 ppm/V
pF
pF
Table 4
Copyright 2016, EM Microelectronic-Marin SA
1344-DS, Version 2.1, 04/2017
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Timing Waveforms
Motor Output Waveform
MOT1
VDD
VSS
MOT2
VDD
VSS
tw
T1
Alarm Output Waveform
1024 Hz
2048 Hz
ALIN
ALOUT
tALD
tP
T2
1
fA1
H1344
Fig. 3
Fig. 4
Copyright 2016, EM Microelectronic-Marin SA
1344-DS, Version 2.1, 04/2017
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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).
H1344
Alarm Output
The alarm is activated by connecting ALARMIN to VSS 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 ALARMIN pin fulfills three functions:
a) For normal operation, the ALARMIN 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 VSS, the alarm signal is
provided at pin 6.
If the ALARMIN pin is connected to VDD, all output
frequencies are increased by a factor of 64, the alarm
modulation of fA1 = 8Hz and fA = 2kHz are suppressed.
Test configuration
1.5V +
Test
Operating range of trimmer
Capacitance: 1.5 pF CTR 30 pF
CTR
1
H1344
2 V40
V41
3 V47
8
7
6
45
Alarm Output
RM
Fig. 5
Copyright 2016, EM Microelectronic-Marin SA
1344-DS, Version 2.1, 04/2017
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Pad Location Diagram
All dimensions in m
1000
795
VDD
VSS
231
MOT2
0 ALIN/
TEST1
276
192
OSCIN
H1344
v40
v41
v47
v143
v221
OSCOUT
ALOUT/
TEST2
MOT1
1270
978
702
304
28
H1344
1000
795
VDD
VSS
231 MOT2
0 ALIN
276
192
Chip size : 1270 x 1397 microns
50 x 55 mils
OSCOUT
H1344
v38
OSCIN
ALOUT
MOT1
1270
Copyright 2016, EM Microelectronic-Marin SA
1344-DS, Version 2.1, 04/2017
5
978
702
304
28
Fig. 6
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420005-A01, 2.0