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PDF 5616 Data sheet ( Hoja de datos )
| Número de pieza | 5616 | |
| Descripción | 4-DIGIT LCD AUTOMOTIVE CLOCK-PROGRAMMABLE | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 5616 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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5616
56162-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
2-FUNCTION, 4-DIGIT
LCD AUTOMOTIVE CLOCK—PROGRAMMABLE
The SCL5616HW is a 2-function digital automotive clock circuit.
CTb2
COLON
U Yg3
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Lad3
O Nb3
Rg4
Of4
Pa4
ES2
D CSELECT
GROUND
2040 x 3040 µm
0.080 x 0.120 in
c1
e2
d2
c2
e3
c3
e4
d4
c4
b4
S1
DATA
TINUEERENDwg. No. PC-001
N FABSOLUTE MAXIMUM RATINGS
O ESupply Current, IDD .......................... 2.0 mA
RInput Voltage Range, VIN
C(except VPP) ...................... -0.3 V to VDD
S R(Programming
IPower Voltage, VPP) .................. 18.5 V
OInput Current (except VPP), IIN ......... ±10 mA
D FPower Dissipation, PD ................... 300 mW
Fabricated on a single monolithic chip using silicon-gate CMOS PROM
technology, it offers low cost, low power, and high reliability. It also
includes digital frequency correction, stored in the internal nonvolatile
memory, for easy adjustment of the oscillator nominal frequency.
The SCL5616HW is supplied in wafer form and is rated for
continuous operation over the automotive temperature range of
-40°C to +85°C.
FEATURES
s Digital Tuning of Crystal Frequency
s PROM for Storing Frequency Correction Information
s 12 or 24 Hour Timekeeping Option
s Flashing Colon
s Two Switches Control All Setting Functions
s High Noise Immunity
s Internal Power-Up Reset Circuitry
s Internal Voltage Regulation
—Operating Temperature Range,
TA .................................. -40°C to +85°C
Storage Temperature Range,
TS ................................ -65°C to +150°C
Caution: These CMOS devices have static pro-
tection, but are susceptible to damage if exposed
to extremely high static electrical charges.
Always order by complete part number: SCL5616HW .
1 page  
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5616
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
Frequency Correction. The on-chip oscillator circuit increases the
crystal frequency approximately 40 ppm. This ensures that the typical
crystal will operate within the tuning range. With VS at ground, data
pulses are then used to trim the internal clock frequency by 2 to 254
ppm to the required value. The quantity of data pulses needed (1 to
127) is
n = fBP - 64
128 x 10-6
where fBP is the measured frequency at BACKPLANE. Prior to trim-
ming, it must be between 64.000 128 Hz and 64.016 256 Hz.
Operating Modes. The operating modes of the clock are controlled
by the voltages applied to VPP, SELECT, IGNITION, and switches S1
and S2.
Program
VPP
VDD
VDD
18 V
SELECT
VS
S1
VDD
VDD
Ground
Open
Ground
Open
S2 IGNITION
Open
Ground
Open
X
12 V
X
X = Irrelevant, ground or 12 V
Mode
Clock running
Diagnostic
Programming
Clock Running Mode. During the clock running mode, setting
functions are achieved by either momentary or continuous operation
of switches S1 and S2, which are enabled by IGNITION. Hours or
minutes are incremented on S1 or S2 (respectively) depression and
continue at a 1 Hz rate while the switch is depressed.
S1 S2 IGNITION Operation
Open Open
XX
Ground Open
Open Ground
Ground Ground
X
Ground
12 V
12 V
12 V
Clock running
Setting disabled
Set hours
Set Minutes
Change counting sequence (12 to 24 hour
or 24 to 12 hour)
X = Irrelevant, ground or 12 V for IGNITION, ground or open for S1 and S2
Diagnostic Mode. To enter the diagnostic mode, S1 and S2 are oper-
ated with IGNITION connected to 12 V. All segments are displayed for
as long as S1 and S2 are depressed. On opening S1 and S2, the clock
will leave the diagnostic mode and go through a power-up sequence.
In the SCL5616HW, the counting sequence will change (from 12 hour
to 24 hour or from 24 hour to 12 hour). To inhibit the power-up reset,
hold the DATA input low (ground). The counting mode will change
without resetting the hours or minutes counters.
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet 5616.PDF ] | |
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