DS17285/DS17287/ DS17485/DS17487/ DS17885/DS17887 General Description The DS17285, DS17485, DS17885, DS17287, DS17487, and DS17887 real-time clocks (RTCs) are designed to be successors to the industry-standard DS12885 and DS12887. The DS17285, DS17485, and DS17885 (hereafter referred to as the DS17x85) provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery-backed NV SRAM. The DS17x85 also incorporates a number of enhanced functions including a silicon serial number, power-on/off control circuitry, and 2k, 4k, or 8kbytes of battery-backed NV SRAM. The DS17287, DS17487, and DS17887 (hereafter referred to as the DS17x87) integrate a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package. The DS17x85 and DS17x87 power-control circuitry allows the system to be powered on by an external stimulus such as a keyboard or by a time-and-date (wake-up) alarm. The PWR output pin is tri
7885E5 DS17885S-3 0C to +70C 24 SO (300 mils) DS17885S-3 DS17885S-5 0C to +70C 24 SO (300 mils) DS17885S-5 -40C to +85C 24 SO (300 mils) DS17885SN5 24 EDIP DS17887-3 -40C to +85C 24 EDIP DS17887-3 REAL TIME IND DS17885SN-5 DS17887-3 DS17887-3IND DS17887-5 DS17887-5IND 0C to +70C 0C to +70C 24 EDIP DS17887-5 -40C to +85C 24 EDIP DS17887-5 REAL TIME IND + Denotes lead-free package. *A "+" anywhere on the top mark denotes a lead-free package. An "N" or "IND" denotes an industrial temperature range package. Note: A "-5" suffix denotes a VCC = 5V10% device, and a "-3" suffix denotes a VCC = 3V10% device. ____________________________________________________________________ 29 DS17285/DS17287/DS17485/DS17487/DS17885/DS17887 Ordering Information DS17285/DS17287/DS17485/DS17487/DS17885/DS17887 Real-Time Clocks Typical Operating Circuit CRYSTAL VCC X1 VCC X2 Thermal Information PACKAGE VCC THETA-JA (C/W) THETA-JC (C/W) DIP 75 30 SO 105 22 IRQ SQW ALE Chip Information WR RD DS83C520 DS17285 DS17485 DS17885
DS17285/DS17287/ DS17485/DS17487/ DS17885/DS17887 General Description The DS17285, DS17485, DS17885, DS17287, DS17487, and DS17887 real-time clocks (RTCs) are designed to be successors to the industry-standard DS12885 and DS12887. The DS17285, DS17485, and DS17885 (hereafter referred to as the DS17x85) provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery-backed NV SRAM. The DS17x85 also incorporates a number of enhanced functions including a silicon serial number, power-on/off control circuitry, and 2k, 4k, or 8kbytes of battery-backed NV SRAM. The DS17287, DS17487, and DS17887 (hereafter referred to as the DS17x87) integrate a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package. The DS17x85 and DS17x87 power-control circuitry allows the system to be powered on by an external stimulus such as a keyboard or by a time-and-date (wake-up) alarm. The PWR output pin is tri
7885E5 DS17885S-3 0C to +70C 24 SO (300 mils) DS17885S-3 DS17885S-5 0C to +70C 24 SO (300 mils) DS17885S-5 -40C to +85C 24 SO (300 mils) DS17885SN5 24 EDIP DS17887-3 -40C to +85C 24 EDIP DS17887-3 REAL TIME IND DS17885SN-5 DS17887-3 DS17887-3IND DS17887-5 DS17887-5IND 0C to +70C 0C to +70C 24 EDIP DS17887-5 -40C to +85C 24 EDIP DS17887-5 REAL TIME IND + Denotes lead-free package. *A "+" anywhere on the top mark denotes a lead-free package. An "N" or "IND" denotes an industrial temperature range package. Note: A "-5" suffix denotes a VCC = 5V10% device, and a "-3" suffix denotes a VCC = 3V10% device. ____________________________________________________________________ 29 DS17285/DS17287/DS17485/DS17487/DS17885/DS17887 Ordering Information DS17285/DS17287/DS17485/DS17487/DS17885/DS17887 Real-Time Clocks Typical Operating Circuit CRYSTAL VCC X1 VCC X2 Thermal Information PACKAGE VCC THETA-JA (C/W) THETA-JC (C/W) DIP 75 30 SO 105 22 IRQ SQW ALE Chip Information WR RD DS83C520 DS17285 DS17485 DS17885
7885E5 DS17885S-3 0C to +70C 24 SO (300 mils) DS17885S-3 DS17885S-5 0C to +70C 24 SO (300 mils) DS17885S-5 -40C to +85C 24 SO (300 mils) DS17885SN5 24 EDIP DS17887-3 -40C to +85C 24 EDIP DS17887-3 REAL TIME IND DS17885SN-5 DS17887-3 DS17887-3IND DS17887-5 DS17887-5IND 0C to +70C 0C to +70C 24 EDIP DS17887-5 -40C to +85C 24 EDIP DS17887-5 REAL TIME IND + Denotes lead-free package. *A "+" anywhere on the top mark denotes a lead-free package. An "N" or "IND" denotes an industrial temperature range package. Note: A "-5" suffix denotes a VCC = 5V10% device, and a "-3" suffix denotes a VCC = 3V10% device. ____________________________________________________________________ 29 DS17285/DS17287/DS17485/DS17487/DS17885/DS17887 Ordering Information DS17285/DS17287/DS17485/DS17487/DS17885/DS17887 Real-Time Clocks Typical Operating Circuit CRYSTAL VCC X1 VCC X2 Thermal Information PACKAGE VCC THETA-JA (C/W) THETA-JC (C/W) DIP 75 30 SO 105 22 IRQ SQW ALE Chip Information WR RD DS83C520 DS17285 DS17485 DS17885
19-5222; Rev 1; 4/10 Real-Time Clocks The DS17285, DS17485, DS17885, DS17287, DS17487, and DS17887 real-time clocks (RTCs) are designed to be successors to the industry-standard DS12885 and DS12887. The DS17285, DS17485, and DS17885 (hereafter referred to as the DS17x85) provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery-backed NV SRAM. The DS17x85 also incorporates a number of enhanced functions including a silicon serial number, power-on/off control circuitry, and 2k, 4k, or 8kbytes of battery-backed NV SRAM. The DS17287, DS17487, and DS17887 (hereafter referred to as the DS17x87) integrate a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package. The DS17x85 and DS17x87 power-control circuitry allows the system to be powered on by an external stimulus such as a keyboard or by a time-and-date (wake-up) alarm. The PWR output pin is triggered by one or either of these