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Analog Devices Inc. LT1675CGN#TRPBF
- Part No.:
- LT1675CGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Processing
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1675CGN#TRPBF.pdf
- Description:
- IC VIDEO MULTIPLEXER 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,546
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Product details
Overview
LT1675CGN#TRPBF from Analog Devices (formerly Linear Technology) is a triple-channel RGB multiplexer with integrated current-feedback amplifiers, designed for high-speed pixel switching and workstation graphics. It features 250MHz –3dB bandwidth, 2.5ns channel switching time, ±4V to ±6V dual supply operation, and drives 75Ω coaxial cables directly with fixed +2V/V gain. It is used in professional video routing systems requiring low-glitch RGB signal selection.
For engineers reviewing the LT1675CGN#TRPBF datasheet, LT1675CGN#TRPBF pinout, LT1675CGN#TRPBF application, or LT1675CGN#TRPBF equivalent, key selection criteria include its 250MHz small-signal bandwidth, 50mV input-referred switching transient, break-before-make SPDT architecture, ±5V supply compatibility, and 16-pin narrow SSOP package footprint.
Technical Context
The LT1675CGN#TRPBF integrates three independent SPDT analog switches and three matched current-feedback amplifiers on a single die using Linear Technology's proprietary high-speed bipolar process. Each amplifier provides fixed +2V/V gain to compensate for 6dB loss in double-terminated 75Ω video cabling, eliminating external gain-setting resistors.
Switching is controlled via a single SELECT pin (pin 10) that toggles all three RGB channels simultaneously between two input sets (RGB1/RGB2), while ENABLE (pin 9) globally disables all outputs to reduce supply current to 1µA. The break-before-make switch design prevents input feedthrough during transition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Bandwidth | 250MHz - supports full NTSC/PAL and high-resolution RGB video signals without attenuation up to 250MHz. |
| Channel Switching Time | 2.5ns - enables clean pixel-level switching at >100MHz toggle rates in graphics pipelines. |
| Slew Rate | 1100V/µs - ensures minimal distortion on fast-rising video edges and sync pulses. |
| Output Transient | 50mVP-P (input-referred) - sub-LSB glitch magnitude avoids visible artifacts on high-brightness displays. |
| Supply Voltage Range | ±4V to ±6V - compatible with standard ±5V video system rails; absolute max ±6.3V. |
| DC Gain Error | 5–10% (at 75Ω load) - calibrated for cable-driven applications where precise amplitude matching across R/G/B is critical. |
| Shutdown Current | 1µA - enables power-gating in multi-MUX router architectures without PCB layout changes. |
Pinout & Package
LT1675CGN#TRPBF is housed in a 16-lead narrow-body plastic SSOP (GN package), 0.150" wide, with 0.025" pitch. Pin 1 is top-left corner (marking dot adjacent), pin count increases left-to-right on top row (1–8), then right-to-left on bottom row (9–16).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: RED 1 | Red Channel Input 1 | First red video source input; must be terminated to 75Ω; clips if >2V applied. |
| Pin 2: GREEN 1 | Green Channel Input 1 | First green video source input; identical termination and voltage limits as RED 1. |
| Pin 3: BLUE 1 | Blue Channel Input 1 | First blue video source input; identical termination and voltage limits as RED 1. |
| Pins 4, 5: GND | Signal Ground | Dual ground pins minimize ground bounce; connect directly to low-impedance ground plane. |
| Pin 6: RED 2 | Red Channel Input 2 | Second red video source input; selectable via SELECT pin; same termination requirements. |
| Pin 7: GREEN 2 | Green Channel Input 2 | Second green video source input; matches RED 2 timing and drive capability. |
| Pin 8: BLUE 2 | Blue Channel Input 2 | Second blue video source input; fully synchronized with other RGB2 inputs. |
| Pin 9: ENABLE | Global Output Disable | Ground = active; open or pulled to V+ within 300mV = shutdown (1µA IQ); enables MUX expansion. |
| Pin 10: SELECT | Input Pair Selector | High = route RGB1 to outputs; Low = route RGB2; TTL-compatible threshold (0.8V/2V). |
| Pins 11, 12: V– | Negative Supply Rail | Connect to –5V with 4.7µF tantalum bypass; dual pins reduce PSRR degradation at high frequency. |
| Pin 13: VOUT BLUE | Amplified Blue Output | Drives 75Ω cable directly; fixed +2× gain; no external capacitance permitted. |
| Pin 14: VOUT GREEN | Amplified Green Output | Matched gain/phase to VOUT BLUE; supports simultaneous RGB output timing. |
| Pin 15: VOUT RED | Amplified Red Output | Identical AC performance to VOUT GREEN/BLUE; maintains <0.1dB gain matching across channels. |
| Pin 16: V+ | Positive Supply Rail | Connect to +5V with 4.7µF tantalum bypass; decoupling critical for 250MHz stability. |
Key Features
| Feature | Design Value |
|---|---|
| Triple RGB MUX + Amplifier Integration | Eliminates six external gain-setting resistors and reduces board area by >40% vs discrete solutions. |
| Break-Before-Make SPDT Switches | Prevents momentary shorting between RGB1 and RGB2 inputs, removing cross-coupled switching artifacts. |
| 75Ω Cable Drive Capability | Direct interface to broadcast-grade coaxial infrastructure without external line drivers or termination networks. |
| Expandable Router Architecture | Multiple LT1675CGN#TRPBF units can share outputs via ENABLE pin control, supporting up to 20-input RGB routers with <–1.7dB gain error. |
| Low Input-Referred Switching Glitch | 50mVP-P transient measured at 75Ω back-termination/load - invisible on CRT/LCD monitors per NTSC test standards. |
Applications
| Workstation Graphics Routing | RGB Video Inverter |
|---|---|
Use Scenario: High-end CAD/CAM workstations require real-time switching between multiple GPU outputs feeding a single high-resolution display. IC Role / Device Role / Timing Role: LT1675CGN#TRPBF acts as a synchronous RGB pixel mux, selecting between two GPU sources with sub-ns timing alignment across R/G/B channels. Use Value: 2.5ns switching time and <0.01dB gain matching preserve color fidelity and eliminate tearing during dynamic source switching. | Use Scenario: Converting photographic negatives to positive video for archival digitization using inverted RGB signals. IC Role / Device Role / Timing Role: LT1675CGN#TRPBF routes inverted RGB signals only during active video periods, leaving sync/blanking unmodified via timed SELECT control. Use Value: Break-before-make switching prevents negative/positive signal overlap, ensuring clean blanking intervals and accurate grayscale reproduction. |
| Logo ("Bug") Insertion | Color Bar Test Pattern Generation |
Use Scenario: Overlaying semi-transparent logos or crosshairs onto live broadcast video feeds in real time. IC Role / Device Role / Timing Role: Two LT1675CGN#TRPBF units operate as a 2-bit weighted DAC, blending white levels into RGB paths under synchronous key signal control. Use Value: Matched 0.01dB gain matching between units ensures consistent luminance weighting across R/G/B, preventing hue shifts in overlay regions. | Use Scenario: Generating standardized NTSC/PAL-compatible RGB color bar patterns for video equipment calibration. IC Role / Device Role / Timing Role: LT1675CGN#TRPBF adds composite sync pulses to RGB bars by switching in –0.286V during blanking intervals via SELECT pin. Use Value: Fixed +2V/V gain and 250MHz bandwidth maintain bar edge sharpness and chroma fidelity across all eight color fields. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6555 | Higher 650MHz bandwidth, 2200V/µs slew rate, 2:1 input configuration (not triple RGB) | Optimized for single-channel ultra-high-speed video (e.g., HD-SDI), lacks native triple-RGB parallel architecture | Select LT6555 only when >400MHz bandwidth is required and RGB channel count can be reduced via time-multiplexing. |
| LT1204 | 4-input video MUX with 75MHz current-feedback amp, adjustable gain, 90dB channel separation | Lower bandwidth limits use to SD/ED video; supports 4:1 switching but requires external gain resistors and termination | Choose LT1204 for cost-sensitive SD video systems where 75MHz bandwidth suffices and flexible input count outweighs RGB integration. |
Compared with LT6555 and LT1204, the LT1675CGN#TRPBF delivers unique triple-RGB integration with 250MHz bandwidth and zero external gain components-making it optimal for professional RGB routing where channel synchronization, board space, and cable drive simplicity are prioritized over raw bandwidth or input count flexibility.
Availability
LT1675CGN#TRPBF is available at Aetrix Electronics and suitable for workstation graphics routing, broadcast video infrastructure, RGB test equipment, and medical imaging displays requiring stable component supply and long-term obsolescence management.
Supply support for LT1675CGN#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 LT1675CGN#TRPBF belongs to Linear Technology's high-speed video amplifier and multiplexer product line, engineered specifically for broadcast, graphics, and instrumentation applications demanding sub-ns switching, cable drive capability, and RGB channel matching.
FAQ
What is the maximum operating temperature range for the LT1675CGN#TRPBF?
The LT1675CGN#TRPBF is specified for 0°C to 70°C ambient operation with guaranteed performance. Its operating temperature range extends to –40°C to +85°C, though extended-range units are not tested at those extremes. The junction temperature must not exceed 150°C, calculated as TJ = TA + (PD × 120°C/W) for the GN package. For industrial designs, thermal derating above 70°C is recommended.
Can the LT1675CGN#TRPBF drive 50Ω coaxial cables, or is it limited to 75Ω?
Yes, the LT1675CGN#TRPBF is explicitly characterized to drive both 50Ω and 75Ω double-terminated coaxial cables. Its current-feedback amplifiers deliver +2V/V gain optimized for the 6dB loss inherent in either impedance, and electrical specifications (e.g., output current, bandwidth, transient response) are validated under 50Ω and 75Ω loads per the datasheet AC characteristics table.
Does the LT1675CGN#TRPBF require external gain-setting resistors?
No, the LT1675CGN#TRPBF has internally set +2V/V gain for all three amplifiers, eliminating the need for six external gain-setting resistors. This design reduces PCB area, removes resistor matching tolerances, and minimizes parasitic capacitance at the amplifier feedback nodes-directly contributing to its 250MHz bandwidth and 1100V/µs slew rate.
How does the ENABLE pin function in the LT1675CGN#TRPBF?
The ENABLE pin (pin 9) of the LT1675CGN#TRPBF controls global output disable: grounding it enables normal operation (25–42mA supply current), while leaving it open or pulling it within 300mV of V+ places the device in shutdown mode (1µA supply current). In shutdown, outputs enter high-impedance state (1.1–2.0kΩ), enabling safe bus sharing in multi-MUX router configurations without signal contention.
Is the LT1675CGN#TRPBF pin-compatible with the LT1675-1 variant?
No, the LT1675CGN#TRPBF (16-pin SSOP) is not pin-compatible with the LT1675-1 (8-pin MSOP or SO-8). The LT1675-1 is a single-channel version with different pin count, pinout, and functionality (VIN1/VIN2/VOUT/SELECT/ENABLE). Interchanging them requires PCB redesign. The LT1675CGN#TRPBF serves triple-RGB applications; the LT1675-1 targets single-channel video sync or monochrome routing.
LT1675CGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm 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:
- 16-SSOP
LT1675CGN#TRPBF FAQ
1.How can I place an order for LT1675CGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1675CGN#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 LT1675CGN#TRPBF reliable?
The price and inventory of LT1675CGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1675CGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1675CGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1675CGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1675CGN#TRPBF?
LT1675CGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1675CGN#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 LT1675CGN#TRPBF?
For technical support, including LT1675CGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1675CGN#TRPBF requirements.
6.How does Aetrix verify that LT1675CGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1675CGN#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 LT1675CGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1675CGN#TRPBF?
All LT1675CGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1675CGN#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 LT1675CGN#TRPBF part is unused and in its original packaging.
Return procedure for LT1675CGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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