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Analog Devices Inc. SIT9001AC-23-33D4-27.27000T
- Part No.:
- SIT9001AC-23-33D4-27.27000T
- Manufacturer:
- Analog Devices Inc.
- Category:
- Oscillators
- Package:
- -
- Datasheet:
-
SIT9001AC-23-33D4-27.27000T.pdf
- Description:
- High Performance Spread Spectrum
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SIT9001AC-23-33D4-27.27000T from SiTime is a factory-programmed, high-performance MEMS spread-spectrum oscillator delivering 27.27 MHz output with ±25 ppm frequency stability (spread disabled), 3.3 V supply, industrial temperature range (–40°C to +85°C), and ultra-low 22–29 ps cycle-to-cycle jitter - deployed in PCI buses, graphics controllers, and LCD display timing systems.
For engineers reviewing the SIT9001AC-23-33D4-27.27000T datasheet, SIT9001AC-23-33D4-27.27000T pinout, SIT9001AC-23-33D4-27.27000T application, or SIT9001AC-23-33D4-27.27000T equivalent, this page provides verified package mapping (7.0 × 5.0 mm), confirmed 4-pin configuration, spread-disable functionality on Pin 1, and real-world EMI reduction capability via down-spread modulation.
Technical Context
The SIT9001AC-23-33D4-27.27000T implements a MEMS-based high-performance synthesizer with integrated spread-spectrum modulator, supporting only down-spread modulation (–0.5% per ordering code "4") and factory-configured spread disable (Pin 1 = L disables spread). It uses triangle-wave modulation at ~32 kHz and operates exclusively in 3.3 V mode (±10%, 2.97–3.63 V).
This variant integrates a programmable drive strength (default setting), delivers full-swing CMOS output into ≤15 pF load, and guarantees no runt pulses during power-up within 10 ms - with standby current limited to 30–50 µA when ST/OE/SD is pulled low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 27.27000 MHz - exact factory-programmed value, stable across industrial temperature range |
| Frequency Stability | ±25 ppm (spread = OFF) - includes initial tolerance, temp, voltage, load, aging, shock & vibration |
| Supply Voltage | 3.3 V ±10% (2.97–3.63 V) - supports standard logic rail; higher drive possible outside spec |
| Operating Temperature | –40°C to +85°C - industrial-grade qualification per JESD22 A104 and MIL-STD-883F |
| Cycle-to-Cycle Jitter | 22–29 ps - measured at 133.33 MHz reference; applies to all frequencies including 27.27 MHz |
| Output Load Drive | ≤15 pF - default drive strength; full-swing CMOS output with 1.0–1.5 ns rise/fall time (20–80% Vdd) |
| Spread Modulation | Down-spread –0.5% (code "4"), disableable via Pin 1 - reduces EMI without affecting system timing margin |
| Power-Up Time | ≤10 ms - time from VDD reaching minimum to first valid clock edge; guaranteed no runt pulses |
Pinout & Package
Package: 7.0 × 5.0 × 0.90 mm surface-mount ceramic SMD oscillator (with optional center pad, not connected or tied to GND per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | ST/OE/SD | Multi-function pin: H/Open = active output; L = standby (weak pull-down) or spread disable (down-spread mode only) |
| 2 | GND | Ground reference for oscillator core and output driver; requires 0.1 µF decoupling capacitor to VDD |
| 3 | SS_OUT | CMOS-compatible clock output (27.27 MHz); full-swing, rail-to-rail, 15 pF max load |
| 4 | VDD | 3.3 V power input; must be stabilized before enabling output; absolute max 3.66 V |
Key Features
| Feature | Design Value |
|---|---|
| MEMS Resonator Core | Eliminates quartz crystal; improves shock, humidity, and vibration immunity vs. traditional oscillators |
| Down-Spread Modulation | –0.5% spread (code "4") reduces peak EMI harmonics by up to 35 dB without altering average frequency |
| Spread Disable Function | Pin 1 control enables deterministic timing mode during debug, test, or EMI-sensitive phases |
| Ultra-Low Jitter | 22–29 ps cycle-to-cycle jitter ensures reliable sampling in high-speed interfaces (PCI, graphics, memory) |
| Industrial Temp Operation | Validated from –40°C to +85°C with full electrical specs - suitable for embedded computing and display systems |
| RoHS/REACH Compliant | Pb-free, MSL1 @ 260°C - compatible with standard lead-free reflow profiles |
Applications
| PCI Bus Timing | Graphics Controller Clocking |
|---|---|
Use Scenario: Provides synchronous clock for PCI Express root complex and endpoint devices in industrial PCs and embedded servers. IC Role / Device Role / Timing Role: Primary system clock source with deterministic jitter profile and spread-disable capability for compliance testing. Use Value: Enables PCIe Gen2+ link training stability while reducing conducted EMI to meet FCC Class B limits without shielding. |
Use Scenario: Drives pixel clock and memory interface timing in GPU-based display subsystems for medical imaging and digital signage. IC Role / Device Role / Timing Role: Low-jitter, spread-spectrum-capable oscillator synchronized to video controller reference. Use Value: Maintains <1 UI jitter margin at 27.27 MHz while suppressing 3rd–11th harmonic emissions that interfere with analog video signals. |
| LCD Display Timing | Interface Controller Synchronization |
Use Scenario: Supplies pixel clock and timing reference for TFT-LCD panels in automotive infotainment and industrial HMIs. IC Role / Device Role / Timing Role: High-stability, low-phase-noise oscillator operating in extended temperature environments. Use Value: Ensures consistent frame timing and eliminates visible flicker or tearing even under thermal cycling from –40°C to +85°C. |
Use Scenario: Clocks USB 2.0, SATA, or PCIe interface controllers in multi-chip modules where EMI coexistence is critical. IC Role / Device Role / Timing Role: Spread-spectrum clock generator with configurable disable for interoperability testing. Use Value: Allows dynamic switching between spread and non-spread modes to isolate EMI sources during system-level validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar spread-spectrum oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SiT9001AC-23-33E4-27.27000T | Same package, frequency, and stability; Pin 1 configured as Output Enable (high-Z) instead of Standby/Spread Disable | Used where downstream logic requires tri-state control rather than low-power standby | Select when system needs output disable without affecting oscillator core power state |
| SiT9001AC-23-33S4-27.27000T | Same package, frequency, and stability; Pin 1 configured as Standby-only (no spread disable function) | Deployed in cost-optimized designs where spread modulation is always enabled | Select when spread is permanently required and no runtime disable is needed |
Compared with SIT9001AC-23-33D4-27.27000T, the E4 variant offers tri-state output control ideal for bus arbitration, while the S4 variant removes spread-disable logic to reduce test complexity - all three share identical jitter, stability, and thermal performance.
Availability
SIT9001AC-23-33D4-27.27000T is available at Aetrix Electronics and suitable for PCI bus timing, graphics controller clocking, and LCD display timing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SIT9001AC-23-33D4-27.27000T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
SiTime Corporation is a fabless semiconductor company specializing in MEMS-based timing solutions, headquartered in Sunnyvale, CA, and serving global electronics manufacturers since 2003.
The SiT9001 product line delivers programmable spread-spectrum oscillators optimized for EMI reduction in high-speed digital systems - targeting PCI, graphics, display, and interface controller applications where quartz alternatives fail under shock or thermal stress.
FAQ
What is the exact output frequency and stability of the SIT9001AC-23-33D4-27.27000T?
The SIT9001AC-23-33D4-27.27000T is factory-programmed to deliver precisely 27.27000 MHz with ±25 ppm total frequency stability over –40°C to +85°C, including initial calibration, temperature, voltage, load, aging, and mechanical stress effects - all guaranteed per SiTime Rev. 1.2 datasheet.
Does the SIT9001AC-23-33D4-27.27000T support spread-spectrum modulation, and how is it controlled?
Yes, the SIT9001AC-23-33D4-27.27000T supports down-spread modulation at –0.5% (ordering code "4") and includes spread disable functionality on Pin 1: pulling Pin 1 low disables spread while maintaining output - a feature confirmed in the SiT9001 datasheet Section "Spread Spectrum Modes" and Pin Configuration table.
What package type and dimensions does the SIT9001AC-23-33D4-27.27000T use?
The SIT9001AC-23-33D4-27.27000T uses a 7.0 × 5.0 × 0.90 mm surface-mount ceramic package (ordering code "4"), with optional center pad that may be left unconnected or tied to GND - dimensions and land pattern are specified on Page 7 of the SiT9001 Rev. 1.2 datasheet.
What is the power-up behavior and current consumption of the SIT9001AC-23-33D4-27.27000T?
The SIT9001AC-23-33D4-27.27000T achieves first valid clock edge within ≤10 ms of VDD reaching minimum, with no runt pulses. Operating current is ≤27 mA at 30 MHz and ≤34 mA at 125 MHz (15 pF load); standby current is 30–50 µA when Pin 1 is low - values confirmed across all supply voltages in the DC Electrical Characteristics table.
Can the SIT9001AC-23-33D4-27.27000T drive loads larger than 15 pF?
No - the SIT9001AC-23-33D4-27.27000T is rated for ≤15 pF load at default drive strength. Driving >15 pF requires factory programming of higher drive strength (e.g., codes R, T, U), which is not implemented in this specific part number; such variants would carry different suffixes per the SiT9001 Part Number Guide.
SIT9001AC-23-33D4-27.27000T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Base Resonator:
- -
- Type:
- -
- Frequency:
- -
- Function:
- -
- Output:
- -
- Voltage - Supply:
- -
- Frequency Stability:
- -
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- -
- Ratings:
- -
- Mounting Type:
- -
- Supplier Device Package:
- 4-VDFN (3.2x2.5)
- Size / Dimension:
- -
- Height - Seated (Max):
- -
SIT9001AC-23-33D4-27.27000T FAQ
1.How can I place an order for SIT9001AC-23-33D4-27.27000T through Aetrix?
Please submit a Request for Quotation (RFQ) for SIT9001AC-23-33D4-27.27000T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SIT9001AC-23-33D4-27.27000T reliable?
The price and inventory of SIT9001AC-23-33D4-27.27000T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SIT9001AC-23-33D4-27.27000T is usually 5 days.
3.What payment methods are accepted for SIT9001AC-23-33D4-27.27000T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIT9001AC-23-33D4-27.27000T transactions.
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4.How is shipping managed for SIT9001AC-23-33D4-27.27000T?
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Once your SIT9001AC-23-33D4-27.27000T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SIT9001AC-23-33D4-27.27000T?
For technical support, including SIT9001AC-23-33D4-27.27000T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIT9001AC-23-33D4-27.27000T requirements.
6.How does Aetrix verify that SIT9001AC-23-33D4-27.27000T is sourced from the original manufacturer or authorized distributors?
All SIT9001AC-23-33D4-27.27000T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SIT9001AC-23-33D4-27.27000T meets industry standards.
7.What is the process for return or replacement of SIT9001AC-23-33D4-27.27000T?
All SIT9001AC-23-33D4-27.27000T units undergo pre-shipment inspection (PSI). If there is an issue with SIT9001AC-23-33D4-27.27000T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SIT9001AC-23-33D4-27.27000T part is unused and in its original packaging.
Return procedure for SIT9001AC-23-33D4-27.27000T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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