View SCL5616HW_381194.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

5616
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
5616
Data Sheet 26110
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK--PROGRAMMABLE
The SCL5616HW is a 2-function digital automotive clock circuit. 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.
c1 e2 d2 c2 e3 2040 x 3040 m 0.080 x 0.120 in c3 e4 d4 c4 BACKPLANE
b2 COLON g3 f3 ad3 b3 g4 f4 a4
The SCL5616HW is supplied in wafer form and is rated for continuous operation over the automotive temperature range of -40C to +85C.
FEATURES
SELECT
GROUND
ABSOLUTE MAXIMUM RATINGS
Supply Current, IDD .......................... 2.0 mA Input Voltage Range, VIN (except VPP) ...................... -0.3 V to VDD (Programming Power Voltage, VPP) .................. 18.5 V Input Current (except VPP), IIN ......... 10 mA Power Dissipation, PD ................... 300 mW Operating Temperature Range, TA .................................. -40C to +85C Storage Temperature Range, TS ................................ -65C to +150C
Caution: These CMOS devices have static protection, but are susceptible to damage if exposed to extremely high static electrical charges.
D EN UE IN ER TF NE OR CR IS O DF --
S2 b4 S1 DATA IGNITION VDD GROUND NU NU VPP
Dwg. No. PC-001
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
P
O R
D
U
T C N
adge1
PM
AM
a2
g2
b1
f2
E C
O
Y L
OSC.
{
Always order by complete part number:
SCL5616HW .
5616
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
TYPICAL APPLICATION
4.194304 MHz CL = 15 pF, RS = 50
6.8 k
+
47 F
IGNITION +12 V 1 M MINUTES S2 HOURS S1
VDD
BACKPLANE
AM
SEGMENTS
PM
GROUNDS
Dwg. EC-001
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright (c) 1990, 1995, Allegro MicroSystems, Inc.
5616
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
ELECTRICAL CHARACTERISTICS at TA = -40C to +85C, in Typical Application (unless otherwise noted).
Limits Characteristic Operating Voltage Range Zener Voltage Segment Output Current Symbol VDD VDD IOUT Test Conditions TA = +25C IDD = 1.0 mA VDD = 5.0 V, VOUT = 4.8 V VDD = 5.0 V, VOUT = 0.2 V Backplane Output Current IOUT VDD = 5.0 V, VOUT = 4.8 V VDD = 5.0 V, VOUT = 0.2 V LCD Drive Signal Input Current Oscillator Frequency Oscillator Starting Time Oscillator Stability Backplane Frequency Switch Debounce Time Osc. Feedback Resistance Osc. Input Capacitance Osc. Output Capacitance Supply Current VDISP IIN fOSC tOSC fOSC fBP tDB ROSC COSCI COSCO IDD VDD = 5.0 V VDD = Zener voltage VDD = 100 mV VDD 5.0 V S1, S2, DATA, or SELECT Min. 4.5 5.5 -20 120 -80 240 4.0 -55 -- -- -- -- 0 -- -- -- -- Typ. -- -- -- -- -- -- -- -- 4.194 304 -- -- 64 -- 16 15 30 -- Max. -- 6.8 -- -- -- -- -- -700 -- 200 1.0 -- 62.5 -- -- -- 1.0 Units V V A A A A V A MHz ms ppM Hz ms M pF pF mA
NOTE: Negative current is defined as coming out of (sourcing) the specified device terminal.
DISPLAY FORMAT
a1
a2
a3
a4
AM PM
e1
b1 g1
f2 g2
b2
f3
b3 g3
f4 g4
b4
COLON c1 e2 c2 e3 c3 e4 c4
d1
d2
d3
d4
Dwg. No. OC-001
5616
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
FUNCTIONAL DESCRIPTION
DATA Logic Levels are VDD and Ground Power-Up Reset. When power up occurs, the hours and minutes counters are reset, and the clock starts running: Operation
12-Hour mode and counting starts from 1:00 AM
Programming Modes. Data is loaded by pulling DATA low (1 s pulse duration) n times to set the desired bits for frequency correction into the data input register. This information is latched in the RAM, thus allowing the testing of the oscillator frequency adjustment without storing the selected pattern in the PROM cells. The data latched in the RAM is stored in the PROM cells when DATA is held low for a minimum of 10 ms. The data stored in the data input register is cleared on any SELECT transition (low to high or high to low). It is also cleared when the program power voltage (VPP) is reduced from 18 V to VDD. Clearing the data input register does not affect the data latched in the RAM.
Program VPP 18 V 18 V VDD DATA VD Pulse Ground VDD SELECT VS Ground VDD Ground
Operation DATA load for frequency correction DATA store Verify stored data
FREQUENCY CORRECTION
FREQUENCY CORRECTION VPP t PHDL VD
1 2 3 127 MAX
t DHL
t wD
t DHPL
t DLH VS t SVDL
t PLSX
VERIFY CYCLE (VPP = V ) DD VS t SLDV SEGMENT OUTPUTS
Dwg. No. WC-001-1
t SHDX
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
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 trimming, 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 VDD VDD Ground
S1 Open Ground Open
S2 Open Ground Open
IGNITION X 12 V X
Mode Clock running Diagnostic Programming
X = Irrelevant, ground or 12 V
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 X Ground 12 V 12 V 12 V Operation Clock running Setting disabled Set hours Set Minutes Change counting sequence (12 to 24 hour or 24 to 12 hour)
Open Open X X Ground Open Open Ground Ground Ground
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 operated 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.
5616
2-FUNCTION, 4-DIGIT LCD AUTOMOTIVE CLOCK
Stored Data Verification. In the verify mode, the complement value of the information stored in the PROM cells is brought out directly to the segment output terminals for easy verification of the stored data. If a bit is programmed (high), the appropriate segment output is turned ON (low). The segments represent the binary equivalent of the number of frequency correction data pulses entered.
Frequency Selection Pulses Segment 64 b4 32 c4 16 d4 8 e4 4 c3 2 e3 1 c2
RECOMMENDED FLASH PROGRAMMING CHARACTERISTICS at TA = +25C, Logic Levels are VDD and Ground (except PROGRAM High)
Characteristic PROGRAM High (18 V) to DATA Low SELECT Valid to DATA Low DATA Low to DATA High DATA High to DATA Low DATA Store Pulse Duration DATA High to PROGRAM Low PROGRAM Low to SELECT Change SELECT Low (Verify) to DATA Valid DATA Hold from End of Verify Symbol tPHDL tSVDL tDLH Min. 1.0 25 1.0 1.0 10 1.0 1.0 -- -- Max. Units -- -- 1.5 -- -- -- -- 1.0 10 s s s s ms s s s ns
tDHL
twD tDHPL tPLSX tSLDV tSHDX
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

▲Up To Search▲

Price & Availability of SCL5616HW

	To Download SCL5616HW Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .