Analysis of Specification Selection for Several High Precision Clock Chips

May 13,2024
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Several high-precision clock chips, almost many applications require precise timing, such as banking systems, security systems, and energy meters. The key to obtaining high-precision real-time clock chips lies in precise frequency oscillation devices and integrated chips used to control them. Epson has actually been committed to researching higher precision clock chips, and has successively launched many high-precision clock chips. Below are a few popular high-precision clock chips for comparison. Selection reference: high-precision clock chip - RX8803SA

RX-8803SA UA+3.4x10-6/-40 ° C to+85 ° C (equivalent to a monthly deviation of ± 9 seconds)

RX-8803SA UB+5.0x10-6/-40 ° C to+85 ° C (equivalent to a deviation of+13 seconds per month)

RX-8803SAUC ± 5.0x10-6/-30 ° C to+70 ° C (equivalent to a monthly deviation of ± 13 seconds)

RX-8803SA is a general-purpose high-precision clock chip with built-in DTCXO, which has high precision stability and a 1/100s precision time register with capture cache. After using digital TCXO for frequency compensation, it achieves excellent frequency accuracy and has the characteristics of high precision, high stability, and low power consumption. Temperature compensation can be used in equipment installed on vehicles, outdoors, and other systems exposed to harsh environmental temperatures.

High precision clock chip - RX-4803SA

RX-4803SA UA ± 3.4x10-6/-40 ° C to+85 ° C (equivalent to a monthly deviation of ± 9 seconds)

RX-4803SAUB+5.0x10-6/-40 ° C to+85 ° C (equivalent to a monthly deviation of ± 13 seconds)

RX-4803SAUC ± 5.0x10-6/-30 ° C to+70 ° C (equivalent to a monthly deviation of ± 13 seconds)

The RX-4803SA integrates a 32.768kHz crystal unit with calibrated frequency and DTCXO technology, which has high frequency stability and can reach+3.4x10-6 (UA: Ta=-40~+85 ° C). In addition, the accuracy of the RX-4803SA time register can reach 1/100s, which can meet the design requirements of high-precision clock chip products, electronic calendars, test equipment clocks, etc.

High precision clock chip - RX-8900CE

RX-8900CE UA+3.4x10-6/-40 ° C to+85 ° C (equivalent to a monthly deviation of ± 9 seconds)

RX-8900CE UB+5.0x10-6/-40'C to+85 ° C (equivalent to a monthly deviation of ± 13 seconds)

RX-8900CE UC ± 5.0x10-6/-30 ° C to+70 ° C (equivalent to a deviation of+13 seconds per month)

The RX-8900 series high-precision clock chip has obvious advantages compared to other clock modules. The module is embedded with a 32.768kHz crystal unit and adopts digital temperature compensation oscillation technology. This enables the chip to achieve high accuracy of+3.4 to+5ppm in the temperature range of -40 to+85 ° C. Unlike other real-time clocks, the embedded crystal unit of the RX8900 series high-precision clock chip eliminates the need for external crystal modules, which greatly saves limited circuit board resources and reduces the difficulty of system design.