DS1553P Maxim Integrated Products, DS1553P Datasheet
DS1553P
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DS1553P Summary of contents
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... Battery voltage level indicator flag Power-fail write protection allows for 10% V power supply tolerance CC Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time ORDERING INFORMATION DS1553P-XXX (5V) - access -100 100 ns access blank 28-pin DIP Module P 34-pin PowerCap® Module ...
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... This design allows the PowerCap to be mounted on top of the DS1553P after the completion of the surface mount process. Mounting the PowerCap after the surface mount process prevents damage to the crystal and battery due to the high temperatures required for solder reflow ...
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DS1553 BLOCK DIAGRAM Figure 1 DS1553 OPERATING MODES Table > < V < <V X BAT ...
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DATA RETENTION MODE The 5-volt device is fully accessible and data can be written and read only when V However, when V is below the power-fail point V CC internal clock registers and SRAM are blocked from any access. When ...
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DS1553 REGISTER MAP Table 2 ADDRESS 1FFFh 10 Year 1FFEh X X 1FFDh X X 1FFCh X FT 1FFBh X X 1FFAh X 10 MINUTES 1FF9h 10 SECONDS OSC 1FF8h W R 1FF7h WDS BMB4 1FF6h ...
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SETTING THE CLOCK The 8th bit the Control Register is the write bit. Setting the write bit like the read bit, halts updates to the DS1553 (1FF8h-1FFFh) registers. After setting the write bit to a ...
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When the RTC Register values match Alarm Register settings, the Alarm Flag bit (AF) is set Alarm Flag Enable (AE) is also set the alarm condition activates the signal is cleared by a ...
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BACK-UP MODE ALARM WAVEFORMS Figure 4 USING THE WATCHDOG TIMER The watchdog timer can be used to detect an out-of-control processor. The user programs the watchdog timer by setting the desired amount of time-out into the 8-bit Watchdog Register (Address ...
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ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground Storage Temperature Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections ...
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DC ELECTRICAL CHARACTERISTICS PARAMETER Active Supply Current TTL Standby Current ( = V CE CMOS Standby Current = 0.2V Input Leakage Current (any input) Output Leakage Current (any output) Output Logic 1 Voltage (I = -1.0 ...
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READ CYCLE, AC CHARACTERISTICS PARAMETER Read Cycle Time Address Access Time to DQ Low-Z CE Access Time CE Data Off time Low-Z OE Access Time OE Data Off Time OE Output Hold from Address READ CYCLE, AC ...
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WRITE CYCLE, AC CHARACTERISTICS PARAMETER Write Cycle Time Address Setup Time Pulse Width WE Pulse Width CE Data Setup Time Data Hold Time Address Hold Time Data Off Time WE Write Recovery Time WRITE CYCLE TIMING, WRITE ENABLE CONTROLLED Figure ...
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POWER-UP/DOWN CHARACTERISTICS PARAMETER Before Power-Down V Fall Time PF(MAX) V PF(MIN) V Fall Time PF(MIN Rise Time PF(MIN) V PF(MAX) V ...
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POWER-UP/DOWN CHARACTERISTICS PARAMETER Before Power-Down V Fall Time PF(MAX) V PF(MIN) V Rise Time PF(MIN) V PF(MAX High RST PF Expected Data Retention Time (Oscillator ...
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AC TEST CONDITIONS Output Load: 100 pF + 1TTL Gate Input Pulse Levels: 0.0 to 3.0V Timing Measurement Reference Levels: Input: 1.5V Output: 1.5V Input Pulse Rise and Fall Times NOTES: 1. Voltage referenced to ground. 2. Typical ...
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DS1553 28-PIN PACKAGE PKG 28-PIN DIM MIN MAX A IN. 1.470 1.490 37.34 37. IN. 0.675 0.740 MM 17.75 18.80 0.315 0.335 C IN. 8.51 9. IN. 0.075 0.105 MM 1.91 2.67 0.015 0.030 E IN. ...
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... DS1553P NOTE: Dallas Semiconductor recommends that PowerCap Module bases experience one pass through solder reflow oriented with the label side up (“live-bug”). Hand Soldering and touch-up: Do not touch or apply the soldering iron to leads for more than 3 seconds. To solder, apply flux to the pad, heat the lead frame pad and apply solder. To remove the part, apply flux, heat the lead frame pad until the solder reflows and use a solder wick to remove solder ...
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... DS1553P WITH DS9034PCX ATTACHED PKG INCHES DIM MIN NOM 0.920 0.925 A B 0.955 0.960 C 0.240 0.245 0.052 0.055 D E 0.048 0.050 F 0.015 0.020 0.020 0.025 DS1553 MAX 0.930 0.965 0.250 0.058 0.052 0.025 0.030 ...
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RECOMMENDED POWERCAP MODULE LAND PATTERN PKG INCHES DIM MIN DS1553 NOM MAX 1.050 - 0.826 - 0.050 - 0.030 - 0.112 - ...