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Analog Devices Inc. LT1675CMS8-1#TRPBF
- Part No.:
- LT1675CMS8-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Processing
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1675CMS8-1#TRPBF.pdf
- Description:
- IC VIDEO MULTIPLEXER 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,070
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Product details
Overview
LT1675CMS8-1#TRPBF from Analog Devices (formerly Linear Technology) is a single-channel high-speed RGB multiplexer with integrated current-feedback amplifier, designed for video sync and pixel-level switching in workstation graphics systems. It features 250MHz –3dB bandwidth, 2.5ns channel switching time, fixed +2V/V gain, ±4V to ±6V dual supply operation, and drives 75Ω coaxial cables directly without external gain-setting resistors.
For engineers reviewing the LT1675CMS8-1#TRPBF datasheet, LT1675CMS8-1#TRPBF pinout, LT1675CMS8-1#TRPBF application, or LT1675CMS8-1#TRPBF equivalent, this page delivers verified electrical specs, package mapping to MSOP-8, truth-table–validated SELECT/ENABLE logic behavior, real-world transient performance (50mVpp switching glitch), and confirmed alternatives for video routing and sync insertion designs.
Technical Context
The LT1675CMS8-1 implements a break-before-make SPDT switch paired with a current-feedback amplifier optimized for double-terminated 75Ω video lines. Its internal 750Ω feedback network sets fixed +2V/V gain, eliminating six external resistors and minimizing parasitic capacitance at the sensitive amplifier node.
Switching is controlled via TTL-compatible SELECT (Pin 5) and ENABLE (Pin 7), with shutdown current of 0.3µA when ENABLE is pulled high or left open. The device operates across –40°C to 85°C, supports ±5V supply (300mW dissipation), and delivers 1100V/µs slew rate and <5ns propagation delay under 100Ω load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Bandwidth | 250MHz - supports full NTSC/PAL and SVGA pixel rates up to 100MHz without gain roll-off. |
| Channel Switching Time | 2.5ns - enables clean toggling between video sources at pixel clock frequencies without visible artifacts. |
| Slew Rate | 1100V/µs - ensures undistorted 2Vpp output swing up to 58MHz full-power bandwidth. |
| DC Gain Error (75Ω) | 5% to 10% - specifies worst-case deviation from ideal ×2 gain when driving standard video cable loads. |
| Output Short-Circuit Current | ±70mA - provides robust fault tolerance during cable mis-termination or hot-plug events. |
| Supply Current (Active) | 8–14mA - enables low-power operation in portable or thermally constrained video subsystems. |
| Shutdown Supply Current | 0.3µA - allows near-zero power consumption in router standby modes without PCB layout changes. |
Pinout & Package
LT1675CMS8-1#TRPBF is housed in an 8-lead MSOP package (3.0mm × 3.0mm × 0.85mm), pin-compatible with SO-8 footprints but with 0.65mm lead pitch. Thermal resistance θJA = 250°C/W enables operation up to 85°C ambient without heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Primary Video Input | Accepts 1Vpp video signal; clamps at 2V to prevent output clipping; requires 75Ω source termination. |
| GND (Pin 2) | Signal Ground Reference | Low-impedance return path for all analog signals; must connect to solid ground plane for video integrity. |
| VIN2 (Pin 3) | Secondary Video Input | Identical to VIN1; used for sync insertion or alternate source selection; shares same input impedance (100–700kΩ). |
| V– (Pin 4) | Negative Power Supply | –4V to –6V rail; bypassed with 4.7µF tantalum + optional 0.1µF ceramic for stable current-feedback loop. |
| SELECT (Pin 5) | Input Channel Selector | TTL-compatible control: HIGH selects VIN1, LOW selects VIN2; 2.2pF capacitance minimizes timing skew. |
| VOUT (Pin 6) | Amplified Output | ×2 buffered output driving 75Ω cable directly; no external components needed; 4.4pF disabled capacitance. |
| ENABLE (Pin 7) | Chip Enable/Shutdown | Ground = active; ≥(V+ – 0.3V) or open = shutdown (0.3µA); also used for cascaded router enable/disable. |
| V+ (Pin 8) | Positive Power Supply | +4V to +6V rail; bypassed identically to V–; supplies both switch and amplifier stages simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed +2V/V Gain Architecture | Eliminates six external gain-setting resistors, reduces board area by >25%, and removes resistor-induced gain mismatch. |
| Break-Before-Make Switching | Prevents input feedthrough during channel transitions, ensuring zero cross-coupling between VIN1 and VIN2. |
| 50mVPP Input-Referred Switching Transient | Glitch amplitude small enough to remain invisible on professional RGB monitors and broadcast-grade displays. |
| 90dB Chip-Disable Crosstalk | Enables reliable multi-device expansion in video routers without signal leakage from powered-down units. |
| 75Ω Cable Drive Capability | Direct interface to standard video infrastructure without line drivers or impedance-matching networks. |
Applications
| RGB Sync Insertion | Video Logo ("Bug") Overlay |
|---|---|
|
Use Scenario: Adding composite sync pulses to RGB signals for legacy monitor compatibility in digital workstations. IC Role / Device Role / Timing Role: LT1675CMS8-1#TRPBF acts as a fast analog switch that inserts –0.286V sync level into active video lines during blanking intervals. Use Value: Eliminates need for separate sync generator ICs and discrete level-shifting circuitry while maintaining sub-5ns timing alignment. |
Use Scenario: Embedding semi-transparent brand logos in broadcast video feeds using weighted RGB mixing. IC Role / Device Role / Timing Role: LT1675CMS8-1#TRPBF serves as a 2-bit DAC element in parallel-configured MUX arrays, enabling four-step luminance overlay control. Use Value: Achieves precise 33%/66%/100% white injection levels with matched gain error <0.01dB across channels. |
| Workstation Pixel Routing | NTSC Color Bar Test Pattern Generation |
|
Use Scenario: Dynamically rerouting pixel data streams between GPU outputs and display controllers in high-end CAD/CAM systems. IC Role / Device Role / Timing Role: LT1675CMS8-1#TRPBF functions as a low-glitch, high-bandwidth pixel channel selector synchronized to pixel clocks up to 100MHz. Use Value: Delivers 2.5ns switching with <50mVpp transient, preventing visible tearing or color smearing in 1920×1200@60Hz displays. |
Use Scenario: Generating standardized RGB color bar test patterns for video calibration and production line verification. IC Role / Device Role / Timing Role: LT1675CMS8-1#TRPBF drives RGB cable loads while injecting precisely timed blanking/sync signals derived from divided subcarrier clocks. Use Value: Supports full 8-bar NTSC-compliant pattern generation with <0.07% differential gain and <0.05° differential phase distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video multiplexing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6555 | 650MHz bandwidth, 2200V/µs slew rate, 2:1 MUX only; requires external gain resistors. | Better suited for ultra-high-resolution (>4K) or high-frame-rate video where 250MHz is insufficient. | Select LT6555 when pixel clock exceeds 150MHz or when programmable gain is required. |
| LT1203 | 150MHz bandwidth, 90dB channel separation, wider supply range (±2.5V to ±15V), no integrated amplifier. | Requires external driver stage for 75Ω cable drive; better for multi-channel isolation-critical routing. | Choose LT1203 for cost-sensitive, lower-bandwidth systems needing higher channel-to-channel isolation. |
Compared with LT6555 and LT1203, the LT1675CMS8-1#TRPBF offers optimal balance of bandwidth (250MHz), integrated cable drive, and minimal BOM count-making it ideal for compact workstation graphics and broadcast sync insertion where space and component count are constrained.
Availability
LT1675CMS8-1#TRPBF is available at Aetrix Electronics and suitable for RGB video routing, workstation graphics subsystems, and broadcast sync insertion requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1675CMS8-1#TRPBF 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
Analog Devices acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear products including the LT1675 family.
The LT1675CMS8-1#TRPBF belongs to Linear's high-speed video signal conditioning product line, engineered specifically for pixel-accurate RGB switching, coaxial cable driving, and broadcast-grade video infrastructure applications.
FAQ
What is the maximum video signal amplitude supported by the LT1675CMS8-1#TRPBF?
The LT1675CMS8-1#TRPBF accepts 1Vpp input signals and delivers 2Vpp output due to its fixed +2V/V gain. Applying >2V to VIN1 or VIN2 causes output clipping. For NTSC-related RGB, peak white is 0.714V, making the LT1675CMS8-1#TRPBF fully compatible with standard video levels when properly terminated in 75Ω.
Can the LT1675CMS8-1#TRPBF drive 50Ω coaxial cables, or is it limited to 75Ω?
The LT1675CMS8-1#TRPBF is explicitly characterized for both 50Ω and 75Ω double-terminated cables per datasheet AC specifications. Its current-feedback amplifier output stage provides sufficient drive strength and stability into either impedance, though gain flatness and transient response are optimized for 75Ω video standards.
How does the ENABLE pin function in shutdown mode, and what is the leakage current?
When ENABLE (Pin 7) is pulled to within 300mV of V+ or left open, the LT1675CMS8-1#TRPBF enters shutdown mode with supply current reduced to 0.3µA. In this state, the output presents 1.1–2.0kΩ impedance, and chip-disable crosstalk improves to 90dB - critical for multi-MUX video routers.
Is the LT1675CMS8-1#TRPBF pin-compatible with other packages in the LT1675 family?
No - the LT1675CMS8-1#TRPBF uses an 8-pin MSOP package, while the triple-channel LT1675CGN uses a 16-pin SSOP. Pin assignments differ completely: MSOP has VIN1/VIN2/VOUT/SELECT/ENABLE; SSOP has six inputs (R/G/B × 2), three outputs, and shared SELECT/ENABLE. Direct PCB replacement is not possible.
What is the guaranteed operating temperature range for the LT1675CMS8-1#TRPBF?
The LT1675CMS8-1#TRPBF is specified for operation from –40°C to +85°C. While initial characterization occurs at 0°C to 70°C, the device is designed, characterized, and qualified to meet all electrical specifications across the full –40°C to +85°C industrial temperature range.
LT1675CMS8-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multiplexer
- Applications:
- Professional Video
- Standards:
- -
- Control Interface:
- Logic
- Voltage - Supply:
- 4V ~ 6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
LT1675CMS8-1#TRPBF FAQ
1.How can I place an order for LT1675CMS8-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1675CMS8-1#TRPBF 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 LT1675CMS8-1#TRPBF reliable?
The price and inventory of LT1675CMS8-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1675CMS8-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1675CMS8-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1675CMS8-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1675CMS8-1#TRPBF?
LT1675CMS8-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1675CMS8-1#TRPBF 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 LT1675CMS8-1#TRPBF?
For technical support, including LT1675CMS8-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1675CMS8-1#TRPBF requirements.
6.How does Aetrix verify that LT1675CMS8-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1675CMS8-1#TRPBF 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 LT1675CMS8-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1675CMS8-1#TRPBF?
All LT1675CMS8-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1675CMS8-1#TRPBF, 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 LT1675CMS8-1#TRPBF part is unused and in its original packaging.
Return procedure for LT1675CMS8-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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