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
What are the key features of KC2520B19.6608C10E00?
- 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
What is KC2520B19.6608C10E00 used for?
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) |
Where can I find the KC2520B19.6608C10E00 datasheet?
KC2520B19.6608C10E00 Datasheet DownloadOfficial datasheet from KYOCERA
What are equivalent replacements for KC2520B19.6608C10E00?
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.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
VG-4231CA 25.0000M-FGRC3
Epson Timing
Crystal or Oscillator
CX2016DB16000D0WZRC1
AVX
Crystal or Oscillator
ABS25-32.768KHZ-6-1-T
ABRACON
Crystal or Oscillator
ABS06-32.768KHZ-T
ABRACON
Crystal or Oscillator
ASTXR-12-38.400MHZ-514054-T
ABRACON
Crystal or Oscillator
SG-210STF 50.0000MS3
Epson Timing
Crystal or Oscillator
HCM4910000000ABJT
Citizen Finetech Miyota
Crystal or Oscillator
HCM4920000000ABJT
Citizen Finetech Miyota
Crystal or Oscillator
7A-25.000MAAJ-T
TXC
Crystal or Oscillator
ABM3-16.000MHZ-B4Y-T
ABRACON
Crystal or Oscillator
XRCGB27M120F3M10R0
Murata Electronics
Crystal or Oscillator
ABS25-32.000KHZ-T
ABRACON
Crystal or Oscillator
AIAC-1812-68NJ-T
ABRACON
Crystal or Oscillator
QC5CA8.00000F12B23M
QANTEK TECHNOLOGY CORPORATION
Crystal or Oscillator
CX2016DB20000D0FLJCC
AVX
Crystal or Oscillator
AB-557-03-HCHC-F-L-C-T
ABRACON
Crystal or Oscillator
CB3-3C-80M0000
CTS
Crystal or Oscillator
ABLS2-6.000MHZ-D4Y-T
ABRACON
Crystal or Oscillator
ECS-200-18-30BQ-DS
ECS
Crystal or Oscillator
ABMM-14.31818MHZ-B2-T
ABRACON
Crystal or Oscillator
ABMM-12.000MHZ-B2-T
ABRACON
Crystal or Oscillator
FA-238 25.0000MB-K3
Epson Timing
Crystal or Oscillator
FA-238 16.0000MB-C3
Epson Timing
Crystal or Oscillator
FA-238 25.0000MB-C3
Epson Timing
Crystal or Oscillator