DS1216B Maxim, DS1216B Datasheet
DS1216B
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DS1216B Summary of contents
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... CC condition occurs, an internal lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent loss of watch and RAM data. TYPICAL OPERATING CIRCUIT SmartWatch RAM (DS1216B/C/D/H); SmartWatch ROM (DS1216E/F) FEATURES Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years Converts Standard 512K x 8 ...
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... RST [A2 [A0] 10 DQ0 GND 14 DS1216B/C/E 28-Pin Intelligent Socket SELECTOR GUIDE PART RAM/ROM DS1216B RAM DS1216C RAM DS1216D RAM DS1216E ROM DS1216F ROM DS1216H RAM - Output Enable, Active Low OE - Write Enable, Active Low Switched V CC ...
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DETAILED DESCRIPTION The DS1216 SmartWatch RAM and SmartWatch ROM Sockets are 600-mil-wide DIP sockets with a built-in CMOS watch function RAM controller circuit, and an embedded lithium energy source. The sockets provide an NV RAM solution for memory ...
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If a match is not found, the pointer does not advance and all subsequent write cycles are ignored read cycle occurs at any time during pattern recognition, the present sequence ...
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... FRESHNESS SEAL Each DS1216 is shipped from Maxim with its lithium energy source disconnected, ensuring full energy capacity. When V is first applied at a level greater than the lithium energy source is enabled for battery- CC backup operation ...
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... Registers contain one or more bits that always read logic 0. When writing these locations, a logic acceptable. ADDITIONAL INFORMATION Refer to Application Note 52: Using the Dallas Phantom Real-Time Clocks (available on our website at www.maxim-ic.com/RTCapps) for information about using regarding optional modifications and the phantom clock contained within the SmartWatch ...
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... In this case, the socket will ignore the RST input, preventing address transitions from resetting the pattern match, even if the RST bit is enabled. On the DS1216B and DS1216D, the two V V from the controller is connected to the two V CC modifications are required if the lower density RAM is used ...
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Figure 3. SmartWatch Register Definition REGISTER 12/ 0.1 SEC 10 SEC 10 MIN OSC ...
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... Note: Wave or hand-solder only. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time can affect reliability. RECOMMENDED OPERATING CONDITIONS (T = 0° ...
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CAPACITANCE (T = +25°C) A PARAMETER Input Capacitance Output Capacitance Expected Data Retention AC ELECTRICAL CHARACTERISTICS (V = 4.5V to 5.5V 0°C to +70°C PARAMETER Read Cycle Time CE Access Time OE Access Time CE to ...
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Timing Diagram: Read Cycle to SmartWatch Timing Diagram: Write Cycle to SmartWatch ...
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Timing Diagram: Reset for SmartWatch Timing Diagram: Power-Down CE (L (U) V (L) CC *Note 1 Timing Diagram: Power- (max ...
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... the maximum voltage drop from V CCO is the maximum voltage drop from V 7) Input pulse rise and fall times equal 10ns. 8) Applies to pins RST and WE L. ...
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... PACKAGE INFORMATION For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. ...
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... AM-PM/12-/24-MODE, and Absolute Maximum Ratings sections 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 © ...