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DS17486 Datasheet(PDF) 2 Page - Dallas Semiconductor |
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DS17486 Datasheet(HTML) 2 Page - Dallas Semiconductor |
2 / 38 page DS17485/DS17487 2 of 38 ORDERING INFORMATION PART # DESCRIPTION DS17485XX-X RTC Chip DS17487X-X RTC Module; 24-pin DIP PIN DESCRIPTION X1 - Crystal Input X2 - Crystal Output RCLR - RAM Clear Input AD0–AD7 - Multiplexed Address/Data Bus PWR - Power-On Interrupt Output (Open Drain) KS - Kickstart Input CS - RTC Chip-Select Input ALE - RTC Address Strobe WR - RTC Write Data Strobe RD - RTC Read Data Strobe IRQ - Interrupt Request Output (Open Drain) SQW - Square-Wave Output VCC - +3V or +5V Main Supply GND - Ground VBAT - Battery + Supply VBAUX - Auxiliary Battery Supply NC - No Connect DESCRIPTION The DS17485/DS17487 are real-time clocks (RTC) designed as successors to the industry standard DS1285, DS1385, DS1485, DS1585, and DS1685 PC real-time clocks. These devices provide the industry standard DS1285 clock function with either +3V or +5V operation. The DS17485 also incorporates a number of enhanced features including a silicon serial number, power-on/off control circuitry, 114 bytes of user NV SRAM plus 4kB of additional NV RAM, and 32.768kHz output for sustaining power management activities. 3 +3V operating rang 5 +5V operating range blank commercial temp range N industrial 3 +3V operating range 5 +5V operating range blank commercial temp range N industrial temp range blank 24-pin DIP E 28- pin TSOP S 24- pin SO |
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