Rainbow-electronics DS1554 Instrukcja Użytkownika

1 of 20 022101FEATURES Integrated NV SRAM, real time clock,crystal, power-fail control circuit and lithiumenergy source Clock registers are access

DS155410 of 20ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -.3V to +6.0VStorage Temperature -55°C to +125°CSoldering Temperature

DS155411 of 20DC ELECTRICAL CHARACTERISTICS(Over the Operating Range; VCC=3.3V ±10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESActive Supply Current ICC1

DS155412 of 20READ CYCLE, AC CHARACTERISTICS (Over the Operating Range)VCC=5.0V ±±±±10% VCC=3.3V ±±±±10%PARAMETER SYMBOLMIN MAX MIN MAXUNITS NOTESRea

DS155413 of 20WRITE CYCLE TIMING, WRITE ENABLE CONTROLLED Figure 6WRITE CYCLE TIMING, CHIP ENABLE CONTROLLED Figure 7

DS155414 of 20POWER-UP/DOWN CHARACTERISTICS(Over the Operating Range; VCC=5.0V ±10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCE or WE at VIH , Befor

DS155415 of 20POWER-UP/DOWN CHARACTERISTICS (Over the Operating Range; VCC=3.3V ±10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCE or WE at VIH , Bef

DS155416 of 20AC TEST CONDITIONSOutput Load: 100 pF + 1TTL GateInput Pulse Levels: 0.0 to 3.0VTiming Measurement Reference Levels:Input: 1.5VOutput:

DS155417 of 20DS1554 32-PIN PACKAGEPKG 32-PINDIM MIN MAXA IN.MM1.67038.421.69038.93B IN.MM0.71518.160.74018.80C IN.MM0.3358.510.3659.27D IN.MM0.0751.9

DS155418 of 20DS1554PNOTE:Dallas Semiconductor recommends that PowerCap Module bases experience one pass through solderreflow oriented with the label

DS155419 of 20DS1554P WITH DS9034PCX ATTACHEDPKG INCHESDIM MIN NOM MAXA0.920 0.925 0.930B0.955 0.960 0.965C0.240 0.245 0.250D0.052 0.055 0.058E0.048 0

DS15542 of 20ORDERING INFORMATIONDS1554 5V; 32-pin DIP ModuleDS1554P 5V; 34-pin PowerCap Module board*DS1554W 3.3V; 32-pin DIP ModuleDS1554WP 3.3V; 34

DS155420 of 20RECOMMENDED POWERCAP MODULE LAND PATTERNINCHESPKGDIMMIN NOM MAXA- 1.050 -B- 0.826 -C- 0.050 -D- 0.030 -E- 0.112 -

DS15543 of 20The DS1554 also contains its own power-fail circuitry, which automatically deselects the device when theVCC supply enters an out of toler

DS15544 of 20DATA READ MODEThe DS1554 is in the read mode whenever CE (chip enable) is low and WE (write enable) is high. Thedevice architecture al

DS15545 of 20BATTERY LONGEVITYThe DS1554 has a lithium power source that is designed to provide energy for the clock activity, andclock and RAM data r

DS15546 of 20DS1554 REGISTER MAP Table 2DATAADDRESSB7B6B5B4B3B2B1B0FUNCTION/RANGE7FFFh 10 Year YEAR YEAR 00-997FFEh X X X 10 M MONTH MONTH 01-127FFDh

DS15547 of 20SETTING THE CLOCKThe 8th bit, B7 of the Control Register is the write bit. Setting the write bit to a 1, like the read bit, haltsupdates

DS15548 of 20ALARM MASK BITS Table 3AM4 AM3 AM2 AM1 ALARM RATE1111Once per second1110When seconds match1100When minutes and seconds match1000When hour

DS15549 of 20The IRQ /FT pin can also be activated in the battery backed mode. The IRQ /FT will go low if an alarmoccurs and both ABE and AE are set