DS1245 DALLAS [Dallas Semiconductor], DS1245 Datasheet
DS1245
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DS1245 Summary of contents
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... POWERCAP MODULE (PCM) (USES DS9034PC POWERCAP) PIN DESCRIPTION A0 - A16 - Address Inputs DQ0 - DQ7 - Data In/Data Out - Chip Enable CE - Write Enable WE - Output Enable Power (+3.3V) CC GND - Ground Connect DS1245W A15 A13 A11 A10 ...
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... PACKAGES The DS1245W is available in two packages: 32-pin DIP and 34-pin PowerCap Module (PCM). The 32- pin DIP integrates a lithium battery, an SRAM memory and a nonvolatile control function into a single package with a JEDEC-standard 600-mil DIP pinout. The 34-pin PowerCap Module integrates SRAM for an out-of-tolerance condition ...
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... DS9034PC PowerCap. The PowerCap Module package design allows a DS1245W PCM device to be surface mounted without subjecting its lithium backup battery to destructive high- temperature reflow soldering. After a DS1245W module base is reflow soldered, a DS9034PC PowerCap is snapped on top of the base to form a complete Nonvolatile SRAM module. The DS9034PC is keyed to prevent improper attachment ...
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... COE 150 WC t 100 WR1 t 20 WR2 t 35 ODW t 5 OEW DH1 t 20 DH2 DS1245W =3.3V =0.3V) CC TYPE UNITS NOTES ...
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... WRITE CYCLE 1 SEE NOTES AND DS1245W ...
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... WRITE CYCLE 2 SEE NOTES AND 12 \ POWER-DOWN/POWER-UP CONDITION DS1245W ...
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... WE WE the output buffers remain in a high impedance state during this period. 9. Each DS1245W has a built-in switch that disconnects the lithium source until V the user. The expected t DR time power is first applied by the user. ...
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... Outputs Open Cycle = 200 ns for operating current All voltages are referenced to ground ORDERING INFORMATION DS1245 SSS - III DS1245W NONVOLATILE SRAM, 32-PIN 740-MIL EXTENDED DIP MODULE AC TEST CONDITIONS Output Load: 100 pF + 1TTL Gate Input Pulse Levels 3.0V Timing Measurement Reference Levels Input: 1.5V Output: 1 ...
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... DS1245W NONVOLATILE SRAM, 34-PIN POWERCAP MODULE PKG DIM MIN A 0.920 B 0.980 0.052 E 0.048 F 0.015 G 0.020 DS1245W INCHES NOM MAX 0.925 0.930 0.985 0.990 - 0.080 0.055 0.058 0.050 0.052 0.020 0.025 0.025 0.030 ...
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... DS1245W NONVOLATILE SRAM, 34-PIN POWERCAP MODULE WITH POWERCAP ASSEMBLY AND USE Reflow soldering Dallas Semiconductor recommends that PowerCap Module bases experience one pass through solder reflow oriented label-side up (live-bug). Hand soldering and touch-up Do not touch soldering iron to leads for more than 3 seconds. To solder, apply flux to the pad, heat the lead frame pad and apply solder ...
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... RECOMMENDED POWERCAP MODULE LAND PATTERN RECOMMENDED POWERCAP MODULE SOLDER STENCIL INCHES PKG DIM MIN INCHES PKG DIM MIN DS1245W NOM MAX 1.050 - 0.826 - 0.050 - 0.030 - 0.112 - NOM MAX 1.050 - 0.890 - 0.050 - 0.030 - 0.080 - ...