DS12R885S-5+ Maxim Integrated Products, DS12R885S-5+ Datasheet
DS12R885S-5+
Specifications of DS12R885S-5+
Related parts for DS12R885S-5+
DS12R885S-5+ Summary of contents
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... DS12CR887 Encapsulated DIP (EDIP) Module with Integrated Battery and Crystal ♦ DS12R887 BGA Module Surface-Mountable Package with Integrated Crystal and Rechargeable Battery PART V CC DS12R885S- DS12R885S-5+ RESET T&R RCLR DS12R885S-33+ -40°C to +85°C DS12R885S-33+ SQW T&R V BACKUP DS12CR887-5+ -40°C to +85°C SUPER ± ...
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RTCs with Constant-Voltage Trickle Charger ABSOLUTE MAXIMUM RATINGS Voltage Range on V Pin Relative to Ground .....-0.3V to +6.0V CC Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range EDIP, BGA ........................................................-40°C to +85°C SO ...................................................................-55°C to +125°C Stresses beyond ...
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RTCs with Constant-Voltage Trickle Charger DC ELECTRICAL CHARACTERISTICS (DS12R885 Only 0V 3.2V -40°C to +85°C, unless otherwise noted.) (Note 1) CC BACKUP A PARAMETER SYMBOL V Current (OSC On); BACKUP I BACKUP2 T = ...
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RTCs with Constant-Voltage Trickle Charger AC ELECTRICAL CHARACTERISTICS (V = 2.97V to 3.63V -40°C to +85°C.) (Note PARAMETER SYMBOL Cycle Time Pulse Width, DS Low or R/W High Pulse Width, DS High or R/W Low ...
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RTCs with Constant-Voltage Trickle Charger ASD AD0–AD7 WRITE AD0–AD7 READ AS PW ASH t ASD DS t ASD R ASL AD0–AD7 WRITE _____________________________________________________________________ Motorola Bus Read/Write Timing ASH t ...
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RTCs with Constant-Voltage Trickle Charger AS t ASD DS t ASD R/W CS AD0–AD7 IRQ Release Delay Timing DS RESET IRQ t IRDS PF(MAX) V PF(MIN) RECOGNIZED INPUTS OUTPUTS 6 _____________________________________________________________________ t CYC PW ASH t ASED ...
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RTCs with Constant-Voltage Trickle Charger POWER-UP/POWER-DOWN CHARACTERISTICS (T = -40°C to +85°C) (Note 1) A PARAMETER SYMBOL Recovery at Power-Up V Fall Time PF(MAX) V PF(MIN) V Rise Time PF(MIN) V PF(MAX) DATA RETENTION ...
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RTCs with Constant-Voltage Trickle Charger (V = +3.3V +25°C, unless otherwise noted BACKUP (DS12R885) 625 600 575 550 2.0 2.3 V BACKUP I vs. TEMPERATURE BACKUP (DS12R885) 650 V = 0V, CC 625 V = ...
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RTCs with Constant-Voltage Trickle Charger X1 X2 DS12R887/ V DS12CR887 CC ONLY V BACKUP CONTROL CHARGER GND DS12R887/ DS12CR887 CS ONLY R INTERFACE MOT RESET AD0–AD7 RLCR PIN NAME SO EDIP BGA MOT 2 — ...
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RTCs with Constant-Voltage Trickle Charger PIN NAME SO EDIP BGA D5–D8, 12 E1–E8, GND F5– N.C. 20– ...
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RTCs with Constant-Voltage Trickle Charger PIN NAME SO EDIP BGA Reset Input. The active-low RESET pin has no effect on the clock, calendar, or RAM. On power-up, the RESET pin can be held low for a time to allow the ...
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RTCs with Constant-Voltage Trickle Charger Detailed Description The DS12R885 is a drop-in replacement for the DS12885 RTC. The device provides 14 bytes of real- time clock/calendar, alarm, and control/status registers and 114 bytes of nonvolatile, battery-backed static RAM. A time-of-day ...
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RTCs with Constant-Voltage Trickle Charger An external 32.768kHz oscillator can also drive the DS12R885. In this configuration, the X1 pin is connected to the external oscillator signal and the X2 pin is left unconnected. Clock Accuracy The accuracy of the ...
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RTCs with Constant-Voltage Trickle Charger methods of avoiding any possible incorrect time and calendar reads are covered later in this text. The three alarm bytes can be used in two ways. First, when the alarm time is written in the ...
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RTCs with Constant-Voltage Trickle Charger Table 2B. Time, Calendar, and Alarm Data Modes—Binary Mode ( ADDRESS BIT 7 BIT 6 BIT 5 00H 0 0 01H 0 0 02H 0 0 03H 0 0 AM/PM 04H 0 0 ...
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RTCs with Constant-Voltage Trickle Charger Control Registers The DS12R885 has four control registers that are accessible at all times, even during the update cycle. BIT 7 BIT 6 BIT 5 UIP DV2 Bit 7: Update-In-Progress (UIP). This bit is a ...
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RTCs with Constant-Voltage Trickle Charger BIT 7 BIT 6 BIT 5 SET PIE Bit 7: SET. When the SET bit is 0, the update transfer functions normally by advancing the counts once per second. When the SET bit is written ...
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RTCs with Constant-Voltage Trickle Charger BIT 7 BIT 6 BIT 5 IRQF PF Bit 7: Interrupt Request Flag (IRQF). This bit is set to 1 when any of the following are true PIE = AIE ...
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RTCs with Constant-Voltage Trickle Charger Nonvolatile RAM (NV RAM) The 114 general-purpose NV RAM bytes are not dedi- cated to any special function within the DS12R885. They can be used by the processor program as battery-backed memory and are fully ...
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RTCs with Constant-Voltage Trickle Charger Table 3. Periodic Interrupt Rate and Square-Wave Output Frequency SELECT BITS t PERIODIC PI REGISTER A INTERRUPT RATE RS3 RS2 RS1 RS0 None 3.90625ms ...
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RTCs with Constant-Voltage Trickle Charger Handling, PC Board Layout, and Assembly The EDIP and BGA packages contain a quartz tuning- fork crystal. Pick-and-place equipment can be used, but precautions should be taken to ensure that exces- sive shocks are avoided. ...
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RTCs with Constant-Voltage Trickle Charger Pin Configurations (continued) TOP VIEW (BUMP SIDE DOWN DS12R887 RESET IRQ V SQW CC 4 RCLR V MOT ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2010 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc ...