KC2520B19.6608C10E00 KYOCERA Crystal or Oscillator (Other) In Stock
KYOCERA KC2520B19.6608C10E00 is a 19.6608 MHz CMOS crystal oscillator with ±50 ppm frequency stability and 15 pF load capacitance. Delivers a clean CMOS-compatible clock output in a compact 4-pin 2.5x2x0.7mm SMD package. Well suited for UART baud-rate generation and telecommunications timing where exact 19.6608 MHz frequency is required.
- Manufacturer
- KYOCERA
- Package
- Other
- Pin Count
- 4
- Lifecycle
- ACTIVE
- Datasheet
- KC2520B19.6608C10E00 Datasheet PDF
- Category
- Crystal or Oscillator
- Price
- From $4.7730(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 19.6608 MHz frequency ideal for UART and USART baud-rate generation without fractional dividers
- ±50 ppm frequency stability ensuring accurate clocking across industrial temperature ranges
- CMOS-compatible output for direct connection to MCU and FPGA clock inputs
- Ultra-compact 2.5 mm x 2 mm x 0.7 mm 4-pin CSMD package for tight PCB layouts
- 15 pF load capacitance specification matching standard CMOS oscillator input requirements
Applications
The KC2520B19.6608C10E00 is the preferred clock source for serial communication systems where 19.6608 MHz enables integer division to standard UART baud rates from 300 bps to 921600 bps with zero error. Its stable CMOS output connects directly to microcontroller external clock inputs in embedded modems, UART expanders, and network interface modules. The 2.5x2 mm footprint makes it a drop-in timing solution in space-constrained designs such as wireless modules, IoT gateways, and DSL line interface boards.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Why is 19.6608 MHz specifically chosen over 20 MHz for UART-based communication systems?
19.6608 MHz divides evenly by standard UART baud-rate divisors to yield exact baud rates such as 115200 bps (divide by 170), 57600 bps (divide by 340), and 9600 bps (divide by 2048), producing 0% baud rate error. In contrast, a 20 MHz oscillator introduces fractional remainders that cause accumulated timing error in long data frames, increasing bit error rate in systems running at 921600 bps or higher without hardware FIFO correction.
What is the frequency tolerance of the KC2520B19.6608C10E00, and how does ±50 ppm affect clocking accuracy?
The oscillator is specified at ±50 ppm, meaning the output frequency stays within ±981 Hz of 19.6608 MHz across operating conditions. At 115200 bps UART, this translates to a worst-case timing deviation of about 0.4% per bit, well within the ±5% UART receiver window tolerance. The ±50 ppm stability is sufficient for most industrial serial communication applications over the standard -20°C to +70°C commercial temperature range.
How does the 2.5 mm x 2 mm package of the KC2520B19.6608C10E00 compare to common 5 mm x 3.2 mm oscillator packages?
The CSMD 2.5 mm x 2 mm footprint occupies just 5 mm² of PCB area, roughly 68% less than a standard 5032 (5 mm x 3.2 mm) oscillator package. The 0.7 mm height also reduces profile by approximately 50% compared to 1.3 mm tall 5032 packages, which matters for modules with strict height constraints such as SIM card slots or stacked board assemblies in IoT devices where vertical clearance is under 1.5 mm.
Can the CMOS output of the KC2520B19.6608C10E00 directly drive multiple clock inputs, and what is the fanout limitation?
The CMOS output can directly drive 1 to 2 standard CMOS inputs without buffering at 19.6608 MHz. Driving more than 2 loads increases capacitive loading on the output pin and may degrade output rise time beyond the 10 ns to 90% specification, potentially causing clock skew or setup violations in receiving logic. For fanout beyond 2 inputs, a dedicated CMOS buffer or clock distribution IC should be inserted downstream to maintain signal integrity at frequencies above 10 MHz.
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About KYOCERA
KYOCERA is a leading electronic component manufacturer. FindMyChip sources KYOCERA ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.7400 | $7.74 |
| 14+ | $5.1600 | $72.24 |
| 49+ | $4.7730 | $233.88 |
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