PCF1171CU [NXP]
4-digit LCD car clock; 4位LCD汽车时钟
| 型号： | PCF1171CU |
| 厂家： | 
NXP |
| 描述： | 4-digit LCD car clock |
| 文件： | 总16页 (文件大小：115K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
PCF1171C
4-digit LCD car clock
1997 Apr 16
Product specification
Supersedes data of September 1993
File under Integrated Circuits, IC16
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
FEATURES
GENERAL DESCRIPTION
• Driving standard 31⁄2 or a 4-digit LCD
• Internal voltage regulator for 5 V LCD
• Option for external stabilized voltage supply
• 4.19 MHz oscillator
The PCF1171C is a single chip, 4.19 MHz CMOS car clock
circuit indicating hours and minutes. It is designed to drive
a 31⁄2 or 4-digit liquid crystal display (LCD).
Two external single-pole, single-throw switches will
accomplish all time setting functions. A bonding option
allows the selection of 12-hour or 24-hour display mode.
The circuit is battery-operated via an internal 5 V voltage
regulator or by an external stabilized voltage supply.
• Integrated oscillator output capacitor and polarization
resistor
• Operating ambient temperature: −40 to +85 °C
• 40-lead plastic SMD, face down (VSO40).
ORDERING INFORMATION
TYPE
PACKAGE
NUMBER
NAME
DESCRIPTION
VERSION
PCF1171CT
PCF1171CU
VSO40
plastic very small outline package; 40 leads; face down(1)
uncased chip in tray(2)
SOT158-2
−
−
Notes
1. See Fig.1 and Chapter “Package outline” for pin layout and package details.
2. See Chapter “Chip dimensions and bonding pad locations” for pad layout and package details.
1997 Apr 16
2
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
PINNING
SYMBOL PIN
DESCRIPTION
test reset; connect to (VDD
test speed-up; connect to (VDD
SYMBOL PIN
DESCRIPTION
TR
38
39
40
)
OSC OUT
OSC IN
S1
1
2
3
4
5
oscillator output
oscillator input
set hour
TS
)
(VDD
)
positive supply for test and oscillator
inputs
S3
±2 minute correction
BP
64 Hz backplane driver
(common of LCD)
ADEG1
C1
6
7
8
9
segment driver
segment driver
segment driver
segment driver
(V
)
E2
OSC OUT
OSC IN
S1
1
2
40
39
DD
D2
TS
C2
10 segment driver
11 segment driver
12 segment driver
13 segment driver
14 segment driver
15 segment driver
16 segment driver
17 segment driver
18 set minutes
3
38 TR
37 B1
E3
S3
4
D3
BP
5
36
G2
C3
ADEG1
C1
6
35 F2
34 A2
E4
7
D4
C4
E2
8
33
32
31
30
29
B2
B4
D2
9
P3, P4
P1, P2
G3
S2
10
11
12
C2
PCF1171CT
S4
19 internal voltage regulation
20 negative supply
21 selectable correction mode
22 12/24-hour mode
23 positive supply
24 segment driver
25 segment driver
26 segment driver
27 segment driver
28 segment driver
29 segment driver
30 segment driver
31 colon flashing
32 colon static
E3
VSS
S6
D3
F3
C3 13
28 A3
S5
14
E4
27
B3
VDD
A4
15
16
17
D4
C4
B4
26
25
24
23
22
G4
F4
F4
G4
B3
A4
V
S2 18
S4 19
DD
A3
S5
F3
V
20
21 S6
SS
G3
P1, P2
P3, P4
B2
MSA981
33 segment driver
34 segment driver
35 segment driver
36 segment driver
37 segment driver
A2
F2
G2
B1
Fig.1 Pin configuration, PCF1171CT, (VSO40).
1997 Apr 16
3
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
A1
A2
G2
A3
G3
A4
G4
F1
E1
B1 F2
B2
C2
F3
E3
B3 F4
C3 E4
B4
C4
P1 (P3)
P2 (P4)
G1
D1
C1 E2
D2
D3
D4
MSA984
Fig.2 Segment designation of LCD.
TIME
MSA985
Fig.3 Display mode (24-hour mode shown).
OPERATIONAL INPUTS
Set minutes/reset seconds, switch S2
Operational inputs S1, S2 and S3 have an internal pull-up
resistor to facilitate use of external single-pole,
single-throw switches. A specific debounce circuit is
integrated as protection against contact debounce and
parasitic voltages.
When S2 is closed, the minute setting is corrected
according to the correction mode determined by S6 (see
Chapter “Input options”).
The seconds counter is reset to zero each time S2 is
closed, and begins running each time S2 is opened.
In the description below, an arrangement as shown in
Fig.5 is assumed and S1, S2 and S3 refer to the external
switches rather than the corresponding inputs.
Segment test/reset, switches S1 and S2
If S1 and S2 are closed simultaneously all LCD segments
are switched on. When the switches are released, the
clock starts at 1 : 00 in the 12-hour mode or 0 : 00 in the
24-hour mode.
Set hours, switch S1
Closure of S1 increments the hours according to the
correction mode selected by S6 (see Chapter
“Input options”).
1997 Apr 16
4
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
Time correction ±2 minutes, switch S3
12/24-hour mode, switch S5
For 12-hour display mode, S5 is connected to VDD
This switch operates in two ranges:
.
For 24-hour display mode, S5 is connected to VSS
.
• Displayed time ≥ 58 minutes 00 seconds
• Displayed time ≤ 1 minute 59 seconds.
Single/continuous correction mode, switch S6
When switch S3 is pressed in these ranges, the minutes
and seconds are reset to zero. For displayed
time ≥ 58 minutes 00 seconds, the hour is also
incremented by one.
For single-set correction mode, S6 is connected to VDD
Each closure of S1 or S2 advances the counter by one.
.
For continuous-set correction mode, S6 is connected to
VSS. Momentary closure of S1 or S2 causes single
increments as for single-set correction mode. If S1 or S2 is
kept closed for more than 1s, the counter is automatically
incremented by 1 for each full second that S1 or S2 is kept
closed.
INPUT OPTIONS
In the description below S4, S5 and S6 refer to the external
switches shown in Fig.5 rather than to the corresponding
inputs.
TESTING
In a real application, these inputs will normally be bonded
to the appropriate level to give the required function mode.
In normal operation the test inputs TR (pin 38) and TS
(pin 39) have to be connected to VDD (pin 23). A test
frequency (64 Hz) is available at BP (pin 5). The test mode
is activated by connecting TS to VSS (pin 20). All output
frequencies are then increased by a factor of 65536.
In this mode the maximum input frequency is 100 kHz
(external generator at OSC IN). By connecting TR to VSS
all counters (seconds, minutes and hours) are stopped.
After connecting TR to VDD all counters start from an initial
state.
Internal/external regulation, switch S4
For internal regulation, S4 is closed, the internal voltage
regulator is active and the voltage supply for the LCD is
regulated to 5 V. For external regulation, S4 is open and
the circuit has to be supplied with an externally regulated
voltage.
The switches/inputs described above also operate in the
test mode.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
note 1
MIN.
MAX.
UNIT
VDD
supply voltage with respect to VSS with internal
regulation disconnected;
−
8
V
VI
all input voltages
VSS − 0.3 VDD + 0.3
V
Tamb
Tstg
operating ambient temperature
storage temperature
−40
−55
+85
°C
°C
+125
Note
1. Connecting the supply voltage with reverse polarity, will not harm the circuit, provided the current is limited to 10 mA
by the external resistor.
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”.
1997 Apr 16
5
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
CHARACTERISTICS
VDD = 5 V; VSS = 0 V; Tamb = −40 to +85 °C; crystal: f = 4.194304 MHz; Rs = 50 Ω; CL = 12 pF; unless otherwise
specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VDD
supply voltage
external regulation
internal regulation
3
−
5
−
6
6
5
V
IREG = 1 mA
4
V
IREG
IDD
regulation current with
internal regulation
0.2
mA
current consumption
all switches open; without LCD; 50
internal regulation
400
700
µA
disconnected; note 1
ro
differential internal impedance IREG = 1 mA
−
−
−
150
200
Ω
Oscillator (pins 1 and 2) (see note 2)
tosc
∆f/fosc
Rfb
start time
−
ms
frequency stability
feedback resistance
input capacitance
output capacitance
∆VDD = 100 mV
−
0.2 × 10−6 1 × 10−6
0.1
−
−
1
MΩ
pF
Ci
−
9
Co
19
24
29
pF
Switches S1, S2 and S3 (pins 18, 3 and 4) and test inputs, TS, TR (pins 38 and 39)
Ii
input current
with inputs connected to VSS
50
32
−
150
−
500
150
2.5
µA
ms
kΩ
td
debounce time
RS
segment driver output
resistance
IL = ±50 µA
1
RBP
fBP
backplane driver output
resistance
IL = ±250 µA
−
−
−
0.2
64
−
0.5
−
kΩ
Hz
mV
backplane driver output
frequency
Voffset(DC) LCD DC offset voltage
RL = 200 kΩ; CL = 1 nF
±50
Notes
1. The current IEXT = IREG + IDD + 2 × Ii (+ LCD current).
2. For correct operation of the oscillator: VDD ≥ 3 V.
1997 Apr 16
6
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
CHIP DIMENSIONS AND BONDING PAD LOCATIONS
y
F4
G4
B3
A3
F3
C4
D4
E4
C3
D3
G3
E3
2.66 mm
PCF1171CU
P1, P2
P3, P4
B2
C2
D2
E2
A2
C1
F2
ADEG1
0
0
G2
x
MSA983
2.36 mm
Chip area: 6.28 mm2.
Bonding pad dimensions: 110 µm × 110 µm.
Chip thickness: 381 ±25 µm.
Fig.4 Bonding pad locations, PCF1171CU; 40 terminals.
1997 Apr 16
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Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
Table 1 Bonding pad locations (dimensions in µm)
All x/y coordinates are referenced to the pad G2, see Fig.4.
PAD
x
y
PAD
x
y
OSC OUT
OSC IN
S1
1060
1260
1460
1680
1920
1920
1920
1920
1920
1920
1920
1920
1920
1920
1920
1920
1680
1460
1260
1060
−220
0
S6
S5
860
660
460
240
0
2320
2320
2320
2320
2320
2080
1860
1660
1460
1260
1060
860
660
460
240
0
0
0
VDD
A4
S3
0
BP
0
F4
ADEG1
C1
240
460
660
860
1060
1260
1460
1660
1860
2080
2320
2320
2320
2320
2320
−170
G4
0
B3
0
E2
A3
0
D2
F3
0
C2
G3
0
E3
P1, P2
P3, P4
B2
0
D3
0
C3
0
E4
A2
0
D4
F2
0
C4
G2
0
B4
B1
240
460
660
860
0
S2
TR
0
S4
TS
0
VSS
VDD
0
chip corner (max. value)
1997 Apr 16
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Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
APPLICATION INFORMATION
R = 4.7 kΩ to 8.2 kΩ
battery
C
= 5 pF to 25 pF 4.19 MHz
T
I
EXT
OSC
IN
OSC
OUT
V
TR
TS
(V
)
DD
DD
40
23 38
39
2
1
S6
selectable
correction mode
V
S6
S5
DD
21
22
V
SS
I
2 I
i
I
DD
REG
V
DD
S5
33 µF to
100 µF
12/24 hour mode
V
SS
SHUNT
(1)
VOLTAGE
REGULATOR
segment
drivers
S3
S3
to LCD
4
2 minutes correction
S2
S1
S2
PCF1171C
18
3
set minutes
S1
set hour
19
20
V
SS
S4
internal voltage
regulation
S4
MSA982
(1) Only required if internal regulation is disconnected.
From pin 2 (OSC IN) to any other pin the stray capacitance should not exceed 2 pF.
Fig.5 Typical application diagram.
1997 Apr 16
9
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
PACKAGE OUTLINE
VSO40: plastic very small outline package; 40 leads; face down
SOT158-2
D
E
A
y
X
c
H
v
M
A
E
Z
40
21
L
L
p
θ
Q
A
1
(A )
3
A
A
2
pin 1 index
detail X
1
20
5
w
M
b
p
e
0
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
max.
(1)
(2)
(1)
UNIT
mm
A
A
A
b
c
D
E
e
H
L
L
p
Q
v
w
y
Z
θ
1
2
3
p
E
0.3
0.1
2.45
2.25
0.42
0.30
0.22
0.14
15.6
15.2
7.6
7.5
12.3
11.8
1.7
1.5
1.15
1.05
0.6
0.3
2.70
0.11
0.25
0.762
0.03
2.25
0.089
0.2
0.1
0.1
7o
0o
0.012 0.096
0.004 0.089
0.017 0.0087 0.61
0.012 0.0055 0.60
0.30
0.29
0.48
0.46
0.067 0.045
0.059 0.041
0.024
0.012
inches
0.010
0.008 0.004 0.004
Note
1. Plastic or metal protrusions of 0.4 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
92-11-17
95-01-24
SOT158-2
1997 Apr 16
10
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
SOLDERING
Introduction
Wave soldering
Wave soldering techniques can be used for all VSO
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 VSO
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.
1997 Apr 16
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Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
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.
1997 Apr 16
12
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
NOTES
1997 Apr 16
13
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
NOTES
1997 Apr 16
14
Philips Semiconductors
Product specification
4-digit LCD car clock
PCF1171C
NOTES
1997 Apr 16
15
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Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR,
Tel. +60 3 750 5214, Fax. +60 3 757 4880
Uruguay: see South America
Vietnam: see Singapore
Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905,
Tel. +9-5 800 234 7381
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,
Tel. +381 11 625 344, Fax.+381 11 635 777
Middle East: see Italy
For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications,
Internet: http://www.semiconductors.philips.com
Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
© Philips Electronics N.V. 1997
SCA54
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
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under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
417087/1200/02/pp16
Date of release: 1997 Apr 16
Document order number: 9397 750 01526
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