Rainbow-electronics DS1747P Manuel d'utilisateur

1 of 18 072401FEATURES§ Integrated NV SRAM, real-time clock,crystal, power-fail control circuit and lithiumenergy source§ Clock registers are access

DS1747/DS1747P10 of 18WRITE CYCLE, AC CHARACTERISTICS (Over the Operating Range; VCC = 5.0V ± 10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESWrite Cycle

DS1747/DS1747P11 of 18WRITE CYCLE TIMING DIAGRAM, WRITE ENABLE CONTROLLEDWRITE CYCLE TIMING DIAGRAM, CHIP ENABLE CONTROLLED

DS1747/DS1747P12 of 18POWER–UP/DOWN AC CHARACTERISTICS(Over the Operating Range; VCC = 5.0V ± 10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCE or WE

DS1747/DS1747P13 of 18POWER–UP/DOWN CHARACTERISTICS (Over the Operating Range; VCC = 3.3V ± 10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCE or WE a

DS1747/DS1747P14 of 18AC TEST CONDITIONSOutput Load: 100 pF + 1TTL GateInput Pulse Levels: 0.0 to 3.0VTiming Measurement Reference Levels:Input: 1.5

DS1747/DS1747P15 of 18DS1747 32-PIN PACKAGEPKG 32-PINDIM MIN MAXA IN.MM1.68042.671.74044.20B IN.MM0.71518.160.74018.80C IN.MM0.3358.510.365

DS1747/DS1747P16 of 18DS1747PPKG INCHESDIM MIN NOM MAXA 0.920 0.925 0.930B 0.980 0.985 0.990C - - 0.080D 0.052 0.055 0.058E 0.048 0.050 0.052F 0.015 0

DS1747/DS1747P17 of 18DS1747P WITH DS9034PCX ATTACHEDPKG INCHESDIM MIN NOM MAXA 0.920 0.925 0.930B 0.955 0.960 0.965C 0.240 0.245 0.250D 0.052 0.055 0

DS1747/DS1747P18 of 18RECOMMENDED POWERCAP MODULE LAND PATTERNINCHESPKGDIMMIN NOM MAXA - 1.050 -B - 0.826 -C - 0.050 -D - 0.030 -E - 0.112 -

DS1747/DS1747P2 of 18PIN DESCRIPTIONA0–A18 – Address InputCE – Chip EnableOE – Output EnableWE – Write EnableVCC – Power Supply InputGND – Gro

DS1747/DS1747P3 of 18DS1747 BLOCK DIAGRAM Figure 1PACKAGESThe DS1747 is available in two packages (32–pin DIP and 34–pin PowerCap module). The 32–pin

DS1747/DS1747P4 of 18DS1747 TRUTH TABLE Table 1VCCCE OE WEMODE DQ POWERVIHX X DESELECT HIGH-Z STANDBYVILXVILWRITE DATA IN ACTIVEVILVILVIHREAD DATA OUT

DS1747/DS1747P5 of 18DS1746 REGISTER MAP Table 2DATAADDRESSB7 B6 B5 B4 B3 B2

DS1747/DS1747P6 of 18DATA RETENTION MODEThe 5-volt device is fully accessible and data can be written or read only when VCC is greater than VPF.Howev

DS1747/DS1747P7 of 18ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground –0.3V to +6.0VStorage Temperature –40°C to +85°CSoldering Temp

DS1747/DS1747P8 of 18DC ELECTRICAL CHARACTERISTICS (Over the Operating Range; VCC = 3.3V ± 10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESActive Supply C

DS1747/DS1747P9 of 18READ CYCLE, AC CHARACTERISTICS(Over the Operating Range; VCC = 3.3V ± 10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESRead Cycle Time