DS32KHZ-N Maxim Integrated Products, DS32KHZ-N Datasheet
DS32KHZ-N
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DS32KHZ-N Summary of contents
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... DS32KHZ-N 0ºC to +70º (0.300”) DS32KHZS 16 SO (0.300”) 0ºC to +70ºC DS32KHZS 16 SO (0.300”) -40ºC to +85ºC DS32KHZSN -40ºC to +85º (0.300”) DS32KHZSN 0ºC to +70ºC 36 BGA DS32KHZ 36 BGA -40ºC to +85ºC DS32KHZ-N REV: 080607 ...
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ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground………………………………………………………………-3.0V to +7.0V Operating Temperature Range (Noncondensing) Commercial:…………………………………………………………………………………………………..0°C to +70°C Industrial:……………………………………………………………………………………………………-40°C to +85°C Storage Temperature Range………………………………………………………………………………….-40°C to +85°C Soldering Temperature (BGA, SO)……………………….See the Handling, PC Board Layout, and Assembly section. ...
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... Crystal Aging (First Year) These parameters are measured using a 15pF load. Note 8: Error is measured from the nominal supply voltage of whichever supply is powering the device. Note 9: After reflow. Note 10: Figure 1. DS32kHz Output Waveform SYMBOL CONDITIONS f OUT 0°C to +40°C ∆f/f -40°C to +85° 0° ...
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TYPICAL OPERATING CHARACTERISTICS (V = 3.3V +25°C, unless otherwise noted versus V BAT BAT 4.5 4 3.5 3 2.5 2 1.5 2.7 3.2 3.7 4.2 4.7 5.2 V (V) BAT I vs. V vs. output ...
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... FUNCTIONAL DESCRIPTION The DS32kHz is a temperature-compensated crystal oscillator (TCXO) that outputs a 32,768Hz square wave. While the DS32kHz is powered by either supply input, the device measures the temperature every 64 seconds and adjusts the output frequency. The device requires four pins for operation: V Figure 4 for connection schemes ...
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... The DS32kHz is packaged in a 36-pin ball grid array (BGA). It also is available in a 16-pin 0.300” SO and a 14-pin encapsulated DIP (EDIP) module. The additional PC board space required to add the DS32kHz as an option for driving a RTC is negligible in many applications (see Figure 6) Therefore, adding the DS32kHz to new designs and future board revisions allows the use of the DS32kHz where applications require improved timekeeping accuracy ...
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... RTC as well. BAT can be used to reduce the current consumption of a DS32kHz and an RTC. The values of R1 and C1 may vary depending on the RTC used. However, values of 1.0MΩ and 100pF are recommended as a starting point used to shift the input waveform to the proper level. The recommended value for R2 is 33kΩ ...
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... Application Note 58: Crystal Considerations with Dallas Real-Time Clocks Application Note 701: Using the DS32kHz with Dallas RTCs HANDLING, PC BOARD LAYOUT, AND ASSEMBLY These packages contain a quartz tuning-fork crystal. Pick-and-place equipment may be used, but precautions should be taken to ensure that excessive shocks are avoided. Ultrasonic cleaning should be avoided to prevent damage to the crystal ...