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M48T513Y Datasheet(PDF) 2 Page - STMicroelectronics |
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M48T513Y Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 23 page M48T513Y, M48T513V 2/23 Figure 2. DIP Connections VSS VCC AI02307 M48T513Y M48T513V 10 1 2 5 6 7 8 9 11 12 13 16 17 18 30 29 26 25 24 23 22 21 20 19 3 4 28 27 32 31 14 15 34 33 36 35 A1 A0 DQ0 A7 A4 A3 A2 A6 A5 A13 A10 A8 A9 DQ7 A15 A11 G E DQ5 DQ1 DQ2 DQ3 DQ4 DQ6 A16 A18 A12 A14 W A17 RSTIN RST IRQ/FT WDI Table 2. Absolute Maximum Ratings (1) Note: 1. Stresses greater than those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to the absolute maximum rating conditions for extended periods of time may affect reliability. 2. Soldering temperature not to exceed 260 °C for 10 seconds (total thermal budget not to exceed 150°C for longer than 30 seconds). CAUTION: Negative undershoots below –0.3V are not allowed on any pin while in the Battery Back-up mode. Symbol Parameter Value Unit TA Ambient Operating Temperature 0 to 70 °C TSTG Storage Temperature (VCC Off, Oscillator Off) –40 to 85 °C VIO Input or Output Voltages –0.3 to VCC +0.3 V VCC Supply Voltage M48T513Y –0.3 to 7.0 V M48T513V –0.3 to 4.6 V IO Output Current 20 mA PD Power Dissipation 1 W DESCRIPTION The M48T513Y/V TIMEKEEPER RAM is a 512Kb x 8 non-volatile static RAM and real time clock, with programmable alarms and a watchdog timer. The special DIP package provides a fully integrat- ed battery back-up memory and real time clock so- lution. The M48T513Y/V directly replaces industry standard 512Kb x 8 SRAM. It also provides the non-volatility of Flash without any requirement for special write timing or limitations on the number of writes that can be performed. Table 1. Signal Names A0-A18 Address Inputs DQ0-DQ7 Data Inputs / Outputs E Chip Enable Input G Output Enable Input W Write Enable Input WDI Watchdog input RST Reset Output (open drain) RSTIN Reset Input IRQ/FT Interrupt / Frequency Test Output (open drain) VCC Supply Voltage VSS Ground For surface mount environments ST provides a Chip Set solution consisting of a 44 pin 330mil SOIC TIMEKEEPER Supervisor (M48T201V/Y) and a 32 pin TSOP Type II (10 x 20mm) LPSRAM (M68Z512/W) packages. The 44 pin 330mil SOIC provides sockets with gold plated contacts at both ends for direct con- nection to a separate SNAPHAT housing contain- ing the battery. |
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