DSC1123CI2-100.0000T - 100MHz LVDS MEMS Oscillator | Microchip
N.º da peça: DSC1123CI2-100.0000T ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.18 | $218,00 |
| 500 | $1.92 | $960,00 |
| 1.000 | $1.74 | $1.740,00 |
| 3.000 | $1.55 | $4.650,00 |
DSC1123CI2-100.0000T Visão geral
An XO (crystal oscillator) is a self-contained timing device delivering a fixed-frequency reference clock without the need for an external crystal or tuning network. MEMS (micro-electromechanical systems) XOs replace traditional quartz resonators with a silicon mechanical structure, providing superior shock and vibration immunity, faster startup, and tighter stability over industrial temperature ranges. They sit within the broader hierarchy of clocking components: XO -> oscillator -> frequency control -> clock generation -> timing IC -> power management and signal chain.
Key features of the DSC1123CI2-100.0000T include LVDS differential output (350 mV swing into 100 ohm, low EMI), ±25 ppm frequency stability across -40 °C to +85 °C, sub-1 ps RMS phase jitter (typical), and an LVDS-compatible tri-state enable/disable function on Pin 1. The 6-VDFN (3.2 x 2.5 x 0.85 mm) package provides an industry-standard footprint compatible with other 6-pin 3.2 x 2.5 mm MEMS oscillators.
The DSC1123 uses a proven silicon MEMS resonator plus an analog PLL multiplier stage. This architecture eliminates quartz-related fragility and provides consistent start-up behavior at any temperature, while the LVDS output stage delivers clean 100 MHz differential signaling to high-performance serializer/deserializer (SerDes) ICs, network PHYs, and FPGA transceiver reference inputs.
Typical applications include Ethernet switch clocking, FPGA reference clocks, PCIe Gen2/Gen3 reference inputs, telecom line cards, and industrial controllers. Its 2.5 V/3.3 V dual-rail compatibility simplifies designs migrating between legacy 2.5 V and modern 3.3 V logic.
When designing with this part, place a 100 ohm differential termination across the LVDS output pins as close to the receiver as possible, and add 0.1 µF + 10 µF decoupling near the VDD pin. Avoid routing the enable line near switching power nodes to prevent false triggering.
This page synthesizes distributor pricing, drop-in cross-brand equivalents, and practical PCB layout guidance not found in the manufacturer datasheet, giving design and sourcing teams a single authoritative reference.
Alternativas drop-in para DSC1123CI2-100.0000T — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
DSC1123CI2-100.0000
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
DSC1123DI2-100.0000T
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
DSC1123CI2-125.0000T
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
DSC1103CI2-100.0000T
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SiT9121AI-100.0000
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ASTMHTA-1030M-LVDS
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
DSC1123CI2-100.0000T Especificações
| Series | DSC1123 |
| Output Frequency | 100 MHz |
| Output Format | LVDS (Differential) |
| Frequency Stability | ±25 ppm |
| Supply Voltage Range | 2.25 V to 3.63 V |
| Supply Voltage (Nominal) | 2.5 V / 3.3 V |
| Faixa de temperatura de operação | -40 °C to +85 °C |
| Encapsulamento | 6-VDFN (3.2 x 2.5 x 0.85 mm) |
| Output Drive | LVDS, 100 Ω differential |
| Enable/Disable Function | Yes (Tri-State, Pin 1) |
| Duty Cycle | 52 % |
| Phase Jitter (RMS, typical) | < 1 ps (12 kHz to 20 MHz) |
| Tipo de montagem | Surface Mount |
| Nível MSL | MSL 3 |
| Status RoHS | RoHS Compliant |
Configuração de pinos do DSC1123CI2-100.0000T
| Pino 1 | EN/NC — Enable/Disable (Tri-State); disabled = output high-impedance |
| Pino 2 | NC — No internal connection (per datasheet) |
| Pino 3 | GND — Ground |
| Pino 4 | OUT+ — LVDS non-inverting output |
| Pino 5 | OUT- — LVDS inverting output |
| Pino 6 | VDD — Supply voltage (2.25 V to 3.63 V) |
Aplicações típicas
DSC1123CI2-100.0000T é adequado para 6 aplicaçãos: Ethernet Switch / PHY Reference Clock, FPGA Transceiver Reference Input, PCIe Gen2/Gen3 Reference Clock Distribution, Telecom Line Card / Baseband Clocking, Industrial Controller / Factory Automation PLC, Server / Storage Backplane Clocking.
Ethernet Switch / PHY Reference Clock
The DSC1123CI2-100.0000T delivers a precise 100 MHz LVDS reference clock for 1G/10G Ethernet PHYs, switches, and MAC interfaces. Its ±25 ppm stability across -40 °C to +85 °C is comfortably within IEEE 802.3 Ethernet frequency tolerance (±100 ppm total), and the LVDS output's 350 mV swing into 100 ohm provides robust common-mode rejection across backplane traces up to 20 cm. Unlike a quartz oscillator, the MEMS resonator eliminates start-up jitter variation across cold temperature, improving link-up reliability in outdoor or hardened industrial switches.
Recomendado
FPGA Transceiver Reference Input
The DSC1123CI2-100.0000T is widely used as a 100 MHz reference clock feeding FPGA transceivers such as Xilinx 7-Series GTX, Intel (Altera) Cyclone V GXB, and Lattice ECP5 SERDES. Its sub-1 ps RMS phase jitter (12 kHz to 20 MHz) preserves the bit-error-rate (BER) budget for transceivers up to 6.25 Gbps. The LVDS differential signaling reduces EMI on high-density boards where multiple FPGAs share clock trees, and the 2.25-3.63 V supply integrates cleanly with both 2.5 V and 3.3 V FPGA banks.
Recomendado
PCIe Gen2/Gen3 Reference Clock Distribution
The DSC1123CI2-100.0000T supplies the 100 MHz reference clock required by PCIe Gen2/Gen3 endpoints and root complexes. Its MEMS resonator holds ±25 ppm accuracy over industrial temperatures, which is well within PCIe CEM specification (±300 ppm). Differential LVDS output drives the 100 ohm reference clock network, suppressing common-mode noise that would otherwise couple into high-layer-count PCIe connectors. Designers route the LVDS pair with 100 ohm differential impedance and place 0.1 uF + 10 uF decoupling at the VDD pin.
Recomendado
Telecom Line Card / Baseband Clocking
The DSC1123CI2-100.0000T provides the system reference clock for telecom line cards, DSLAMs, and small-cell baseband processors. Its -40 °C to +85 °C operating range and ±25 ppm stability suit indoor/outdoor CPE (customer-premises equipment) deployments, while the LVDS output cleanly drives DSP and baseband ASICs. MEMS construction resists the shock and vibration of remote cabinets and pole-mount enclosures far better than quartz, which is critical for long-life telecom infrastructure.
Recomendado
Industrial Controller / Factory Automation PLC
The DSC1123CI2-100.0000T serves as a 100 MHz reference clock inside factory-floor PLCs, motor controllers, and industrial HMIs. Its 2.25-3.63 V supply rides through 24 V industrial bus transients (with adequate front-end regulation), and the wide temperature range handles unconditioned cabinet environments. The enable/disable pin supports low-power sleep modes required by energy-conscious factory automation, while the MEMS design tolerates the constant mechanical vibration present near motors and solenoids.
Recomendado
Server / Storage Backplane Clocking
The DSC1123CI2-100.0000T clocks SATA/SAS controllers, NVMe retimers, and BMC (baseboard management controller) processors in 1U/2U server and storage backplanes. Its LVDS differential output supports long PCB traces typical of dense multi-board systems, while the 3.2 x 2.5 mm VDFN-6 footprint fits easily on the underside of switch cards and backplanes. The MEMS architecture eliminates the aging drift common to quartz, providing long-term frequency accuracy critical for RAID and SAN timing alignment.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para DSC1123CI2-100.0000T — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | DSC1123CI2-100.0000 | DSC1123DI2-100.0000T | DSC1123CI2-125.0000T | DSC1103CI2-100.0000T | SiT9121AI-100.0000 | ASTMHTA-1030M-LVDS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | SiTime | Abracon |
| Package | 6-VDFN (3.2 x 2.5 mm) | 6-VDFN (3.2 x 2.5 mm) - same | 6-VDFN (3.2 x 2.5 mm) - same | 6-VDFN (3.2 x 2.5 mm) - same | 6-VDFN (3.2 x 2.5 mm) - same | 6-VDFN (3.2 x 2.5 mm) - same | 6-VDFN (3.2 x 2.5 mm) - same |
| Output Frequency | 100 MHz | 100 MHz | 100 MHz | 125 MHz | 100 MHz | 100 MHz | 100 MHz |
| Output Format | LVDS | LVDS | LVDS | LVDS | LVPECL | LVDS | LVDS |
| Frequency Stability | ±25 ppm | ±25 ppm | ±25 ppm | ±25 ppm | ±25 ppm | ±25 ppm | ±25 ppm |
| Supply Voltage | 2.25 V to 3.63 V | 2.25 V to 3.63 V | 2.25 V to 3.63 V | 2.25 V to 3.63 V | 2.25 V to 3.63 V | 2.25 V to 3.63 V | 2.25 V to 3.63 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Principais diferenciais
- Wider supply voltage range than typical LVDS oscillators (vs SiT9121AI-100.0000)
- LVDS output vs LVPECL sibling (vs DSC1103CI2-100.0000T)
- Proven MEMS reliability vs quartz (vs ASTMHTA-1030M-LVDS)
Notas de projeto
The DSC1123CI2-100.0000T LVDS output pair (Pin 4 / Pin 5) must be routed as a 100 ohm differential microstrip or stripline with matched lengths (≤150 mil skew) to avoid duty-cycle distortion. Place a 100 ohm differential termination resistor across the LVDS pair at the receiver end, as close to the receiver IC as possible (≤300 mil). Keep the pair away from switching power inductors and high-current traces by at least 3W spacing to minimize common-mode noise coupling. Source: Microchip DSC1103/DSC1123 datasheet layout guidelines.
Place a 0.1 µF X7R ceramic decoupling capacitor within 2 mm of the VDD pin (pin 6) and a 10 µF bulk capacitor on the same supply node. The MEMS resonator draws roughly 30-40 mA during startup - a weak supply (high-ESR bulk cap or long trace inductance) will cause startup failures at cold temperature. Use a low-impedance 2.5 V or 3.3 V plane directly under the package. The Pin 1 enable line, when held low, disables the output stage; route it through a 10 kohm pull-up if unused.
Do not load the LVDS outputs with anything other than the 100 ohm differential termination - capacitive stubs of more than 2 pF will severely distort the eye pattern. Avoid placing the part near a heat source exceeding +85 °C; the MEMS resonator performance degrades beyond spec. Do not route the LVDS pair over a split or voided reference plane - reference-plane discontinuities cause EMI and reflections. Always validate Pin 1 enable polarity against the alternate source you select; SiTime and Abracon equivalents may invert the enable logic.
Informações de conformidade
RoHS compliant per Microchip product page (DigiKey listing, 2026-10-07). Not AEC-Q100 qualified - for automotive applications use a Q1/AEC-Q100 grade oscillator. Halogen-free status not explicitly stated.
