SiTime SIT1534AC-J5-DCC-00.256D

The SiT1534 is the first programmable oscillator with a frequency range of 32.768 kHz to 1 Hz, enabling true pulse-per-second (PPS) operation. SiTime's silicon MEMS technology achieves the smallest footprint in a chip-scale package (CSP). In CSP, these devices reduce footprint by up to 80% compared to existing 2.0×1.2 mm SMD XTAL packages. Unlike XTALs, the SiT1534 oscillator output provides greater component placement flexibility and eliminates external load capacitors, saving additional component count and board space. Unlike standard oscillators, the SiT1534 features NanoDrive™, a factory-programmable output that reduces voltage swing to minimize power consumption. SiTime's MEMS oscillators consist of a MEMS resonator and programmable analog circuitry. Our MEMS resonators are fabricated using SiTime's unique MEMS First® process. A key manufacturing step is EpiSeal®, during which the MEMS resonator is annealed at temperatures exceeding 1000℃. EpiSeal creates an extremely robust, clean vacuum cavity that encapsulates the MEMS resonator and ensures optimal performance and reliability. During the EpiSeal process, a polysilicon cap is grown on top of the resonator cavity, eliminating the need for an additional cap wafer or other special packaging. As a result, SiTime's MEMS resonator die can be used like any other semiconductor die. A unique outcome of SiTime's MEMS First and EpiSeal manufacturing processes is the ability to integrate SiTime's MEMS die with an SOC, ASIC, microprocessor, or analog die within a single package, eliminating external timing components and providing customers with a highly integrated, smaller, and lower-cost solution. For applications requiring XTAL resonator compatibility, the SiT1534 is available in a 2.0×1.2 mm (2012) package. Unlike XTAL resonators, SiTime's silicon MEMS oscillators require power (Vdd) and ground (GND) pins. The Vdd and GND pins are conveniently placed between the two large XTAL pins. When using the SiTime pad layout (SPL), the SiT1534 footprint is compatible with existing 32 kHz XTALs in 2012 SMD packages.

• Factory programmable, frequency range from 32.768 kHz to 1 Hz
• Frequency tolerance < 20 ppm
• Smallest footprint in CSP package: 1.5×0.8 mm
• Pin-compatible with 2.0×1.2 mm XTAL SMD package
• Ultra-low power consumption: < 1 μA
• Vdd supply range: 1.5 V to 3.63 V over -55℃ to +85℃ temperature range
• Supports low-voltage battery backup from coin cell or supercapacitor
• No external load capacitors required on oscillator output
• Internal filtering eliminates external Vdd bypass capacitor
• NanoDrive™ programmable output swing for minimum power consumption
• Lead-free, RoHS and REACH compliant

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