PCA1675U [NXP]
32 kHz watch circuits using a silver-oxide or a 3 V lithium battery; 用氧化银或3 V锂电池32 kHz钟表电路
| 型号： | PCA1675U |
| 厂家： | 
NXP |
| 描述： | 32 kHz watch circuits using a silver-oxide or a 3 V lithium battery |
| 文件： | 总12页 (文件大小：73K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
PCA167x series
32 kHz watch circuits using a
silver-oxide or a 3 V lithium battery
1998 Apr 03
Product specification
Supersedes data of 1997 Apr 22
File under Integrated Circuits, IC16
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
FEATURES
GENERAL DESCRIPTION
• 32 kHz oscillator, amplitude regulated with excellent
frequency stability
The PCA167x series devices are CMOS integrated circuits
specially suited for battery-operated,
quartz-crystal-controlled wrist-watches, with a bipolar
stepping motor.
• High immunity of the oscillator to leakage currents
• Very low current consumption; typically 150 nA
• Stop function for accurate timing
• Chopped motor pulses available
• Power-on reset for fast testing
• Various test modes for testing the mechanical parts of
the watch and the IC.
ORDERING INFORMATION
TYPE
PACKAGE(1)
NUMBER
NAME
DESCRIPTION
VERSION
PCA1672U
PCA1673U
PCA1675U
PCA1676U/10
PCA1677U
−
−
−
−
−
chip in tray
chip in tray
chip in tray
chip on foil
chip in tray
−
−
−
−
−
Note
1. Figure 1 and Chapter “Package outline” show details of standard package, available for large orders only.
Chapter “Chip dimensions and bonding pad locations” shows exact pad locations for other delivery formats.
PINNING
SYMBOL
VSS
PIN
DESCRIPTION
ground (0 V)
1
2
3
4
5
6
7
8
V
1
2
3
4
8
7
6
5
RESET
M2
SS
TEST
OSC IN
OSC OUT
VDD
test output
TEST
OSC IN
oscillator input
oscillator output
positive supply voltage
motor 1 output
motor 2 output
reset input
PCA167xT
M1
V
OSC OUT
DD
MSA978
M1
M2
Fig.1 Pin configuration, PCA167xT, (PMFP8).
RESET
1998 Apr 03
2
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
FUNCTIONAL DESCRIPTION AND TESTING
Motor pulse
Customer testing and stop mode
An output frequency of 32 Hz is provided at RESET (pin 8)
to be used for exact frequency measurement.
The motor output pulse widths (tP) and the cycle times (tT)
are given in Chapter “Available types”.
Connecting the RESET to VDD stops the motor pulses
leaving them in a HIGH impedance 3-state condition and a
32 Hz signal is produced at the TEST pin. A debounce
circuit protects against accidental stoppages due to
mechanical shock to the watch (tDEB = 14.7 to 123.2 ms).
Power-on reset
For correct operation of the Power-on reset the rise time of
VDD from 0 V to 1.55 V should be less than 0.1 ms.
All resettable flip-flops are reset. Additionally the polarity of
the first motor pulse is positive: VM1 − VM2 ≥ 0 V.
Connecting RESET to VSS activates the test mode.
The motor pulse period is 31.25 ms instead of tT. Test and
stop mode are disabled by disconnecting RESET
(open-circuit).
AVAILABLE TYPES
Refer to Fig.2 and to Chapters “Ordering information” and “Functional description and testing”.
SPECIFICATIONS
SHORT
TYPE
NUMBER
PERIOD
DELIVERY
FORMAT(1)
PULSE
WIDTH tP
(ms)
BATTERY
EOL
tT
(s)
DRIVE
(%)
EEPROM
REMARKS
DETECTION
1672
1673
1675
1676
1677
U
U
1
1
7.8
5.8
5.8
5.8
7.8
56
56
no
no
no
no
no
no
no
no
no
no
3 V Lithium
3 V Lithium
no oscillator
3 V Lithium
1.5 V
U
1/16
10
10
100
56
U/10
U
100
Note
1. U = Chip in trays; U/10 = chip on foil.
V
M1 - M2
t
t
P
T
2t
T
MSA977
Fig.2 Motor output waveform (normal operation).
1998 Apr 03
3
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
supply voltage
CONDITIONS
MIN.
−1.8
MAX.
UNIT
VDD
VI
VSS = 0 V; note 1
+6
VDD
indefinite
V
V
all input voltages
VSS
output short-circuit duration
operating ambient temperature
storage temperature
Tamb
Tstg
−10
−30
+60
°C
°C
+100
Note
1. Connecting the battery with reversed polarity does not destroy the circuit, but in this condition a large current flows,
which will rapidly discharge the battery.
HANDLING
Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
advisable to take handling precautions appropriate to handling MOS devices. Advice can be found in
“Data Handbook IC16, General, Handling MOS Devices”.
CHARACTERISTICS
VDD = 1.55 V; VSS = 0 V; fosc = 32.768 kHz; Tamb = 25 °C; crystal: RS = 20 kΩ; C1 = 2 to 3 fF; CL = 8 to 10 pF;
C0 = 1 to 3 pF; unless otherwise specified.
SYMBOL
Supply
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VDD
supply voltage
Tamb = −10 to +60 °C
1.2
1.5
3.5
V
∆VDD
supply voltage variation
transient;
−
−
0.25
V
VDD = 1.2 to 3.5 V
IDD1
IDD2
supply current
supply current
between motor pulses
−
−
150
200
250
350
nA
nA
between motor pulses;
VDD = 3.5 V
IDD3
IDD4
supply current
supply current
stop mode; pin 8
connected to VDD
−
−
180
300
300
480
nA
nA
stop mode; pin 8
connected to VDD
VDD = 3.5 V
;
1998 Apr 03
4
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Motor output
Vsat
saturation voltage Σ (P + N)
RL = 2 kΩ;
Tamb = −10 to +60 °C
−
150
200
mV
Rsc
tT
short-circuit resistance Σ (P + N) Itransistor < 1 mA
−
200
300
note 1
Ω
cycle time
tP
pulse width
note 2
Oscillator
VOSC ST
gm
starting voltage
1.2
6
−
−
−
−
V
transconductance
start-up time
Vi(p-p) = 50 mV
15
1
µS
s
tosc
−
∆f/f
frequency stability
input capacitance
output capacitance
∆VDD = 100 mV
−
0.05 × 10−6 0.3 × 10−6
Ci
−
3
−
pF
pF
Co
19
24
29
Reset input
fo
output frequency
output voltage swing
edge time
−
32
−
−
−
−
−
−
Hz
V
∆Vo
tedge
Iim
R = 1 MΩ; C = 10 pF
R = 1 MΩ; C = 10 pF
note 3
1.4
−
1
µs
nA
nA
peak input current
average input current
−
320
10
Ii(av)
−
Test mode
tT1
cycle time
−
31.25
−
ms
ms
tDEB
debounce time
RESET = VDD
14.7
−
123.2
Notes
1. Cycle time can be changed to one of the following values: 1, 5, 10, 12 or 20 s (see Chapter “Available types”).
2. Pulse width can be varied from 2 ms to 15.7 ms in steps of 1 ms (see Chapter “Available types”).
3. Duty factor is 1 : 32 and RESET = VDD or VSS
.
1998 Apr 03
5
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
CHIP DIMENSIONS AND BONDING PAD LOCATIONS
y
V
SS
OSC OUT
OSC IN
TEST
PCA167xU
SERIES
1.44 mm
0
0
x
V
M1
M2
RESET
DD
2.02 mm
MSA979
Chip area: 2.91 mm2.
Bonding pad dimensions: 110 µm × 110 µm.
Chip thickness: 200 ±25 µm, with bumps: 270 ±25 µm.
Fig.3 Bonding pad locations, PCA167xU series; 8 terminals.
Table 1 Bonding pad locations (dimensions in µm)
All x/y coordinates are referenced to the centre of pad (VDD), see Fig.3.
PAD
x
y
VSS
1290
940
1100
1100
1100
1100
0
TEST
OSC IN
OSC OUT
VDD
481
−102
0
M1
578
0
M2
930
0
RESET
1290
−497.5
0
chip corner (max. value)
−170
1998 Apr 03
6
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
APPLICATION INFORMATION
1.55 V
V
SS
RESET
M2
1
2
3
8
7
6
TEST
OSC IN
C
T
PCA167x
SERIES
(1)
M
15 pF
M1
V
DD
OSC OUT
4
5
MSA980
(1) Quartz crystal case should be connected to VDD. Stray capacitance and leakage resistance from RESET, M1 or M2 to OSC IN should be less than
0.5 pF or larger than 20 MΩ.
Fig.4 Typical application circuit diagram.
1998 Apr 03
7
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
PACKAGE OUTLINE
PMFP8: plastic micro flat package; 8 leads (straight)
SOT144-1
D
E
X
c
m
t
n
H
E
8
5
Q
2
A
2
Q
pin 1 index
1
L
detail X
1
4
e
w M
b
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
(1)
m
max.
n
max.
(1)
A
H
E
Q
Q
2
UNIT
b
c
e
L
t
w
2
D
E
1
0.90
0.70
0.40
0.25
0.19
0.12
3.1
2.9
3.1
2.9
4.6
4.4
0.40
0.30
0.40
0.30
mm
0.80
0.75
0.26
0.3
0.95
0.1
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
94-01-25
95-01-24
SOT144-1
1998 Apr 03
8
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
SOLDERING
Introduction
Wave soldering
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.
• The longitudinal axis of the package footprint must be
parallel to the solder flow.
• The package footprint must incorporate solder thieves at
the downstream end.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Reflow soldering
Reflow soldering techniques are suitable for all SO
packages.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
6 seconds. Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.
Repairing soldered joints
Fix the component by first soldering two diagonally-
opposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
1998 Apr 03
9
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
DEFINITIONS
Data sheet status
Objective specification
Preliminary specification
Product specification
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1998 Apr 03
10
Philips Semiconductors
Product specification
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
PCA167x series
NOTES
1998 Apr 03
11
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© Philips Electronics N.V. 1998
SCA59
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Printed in The Netherlands
415108/1200/03/pp12
Date of release: 1998 Apr 03
Document order number: 9397 750 03604
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