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Texas Instruments LMH1980MMX/NOPB
- Part No.:
- LMH1980MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH1980MMX/NOPB.pdf
- Description:
- IC VIDEO SYNC 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
LMH1980MMX/NOPB from Texas Instruments is an auto-detecting analog video sync separator IC designed for real-time extraction of composite, horizontal, vertical, burst/back porch, and odd/even field timing signals from SD (NTSC/PAL/480I/576I), HD (720P/1080I/P), and PC (VESA) video sources. It supports bi-level (CVBS/Y/C/YPbPr) and tri-level (HD) sync inputs, delivers CMOS logic outputs, and operates from 3.3V to 5V across −40°C to +85°C in a 10-lead VSSOP package.
For engineers reviewing the LMH1980MMX/NOPB datasheet, LMH1980MMX/NOPB pinout, LMH1980MMX/NOPB application, or LMH1980MMX/NOPB equivalent, this device eliminates external RSET resistor tuning via automatic format detection, provides fixed-level sync slicing for 0.5–2 VPP inputs, and delivers sub-microsecond propagation delays for HSync, VSync, and CSync outputs critical in genlock, video capture, and machine vision timing systems.
Technical Context
The LMH1980MMX/NOPB implements adaptive sync detection architecture that distinguishes SD bi-level sync (e.g., NTSC 525-line, PAL 625-line) from HD tri-level sync (e.g., 1080I, 720P) without microcontroller intervention. Its internal clamping circuit fixes the sync slice level at 70 mV above the clamped sync tip, enabling robust operation across input amplitudes from 0.14 VPP to 1.20 VPP.
All logic outputs-including HSOUT, VSOUT, CSOUT, BPOUT, OEOUT, and HD-are negative-polarity CMOS signals with VOL ≤ 0.5 V and VOH ≥ 4.5 V at 5V supply. Propagation delays are format-dependent: tdHSOUT = 60 ns (HDTV), 175 ns (EDTV), and 530 ns (SDTV); TVSOUT pulse width is fixed at 3H; and TSYNC-LOCK is ≤2 video fields after input stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 5 V - Enables direct interface with both 3.3V FPGA I/O banks and legacy 5V video subsystems without level-shifting. |
| Input Sync Amplitude Range | 0.14–0.60 VPP (bi-level), 0.30–1.20 VPP (tri-level) - Supports standard and attenuated video signals without external amplification or attenuation. |
| Sync Lock Time | ≤2 video fields - Ensures rapid re-lock after format switching (e.g., SD→HD transition), avoiding frame drops in real-time video processing. |
| Horizontal Sync Propagation Delay | 60 ns (HDTV), 175 ns (EDTV), 530 ns (SDTV) - Enables precise edge-aligned timing for PLL reference clocks and pixel clock generation. |
| Vertical Sync Pulse Width | 3H (three horizontal periods) - Matches industry-standard VSync duration for seamless integration with display controllers and frame synchronizers. |
| HD Detect Flag Response | Active-low logic output on valid tri-level sync detection - Allows hardware-controlled disabling of SD chroma filters without software polling or GPIO overhead. |
| Operating Temperature | −40°C to +85°C - Qualified for automotive LCD monitors, industrial surveillance enclosures, and outdoor video equipment. |
Pinout & Package
LMH1980MMX/NOPB is housed in a 10-lead VSSOP package (Package Number DGS0010A), measuring 3.0 mm × 3.0 mm × 0.9 mm, with 0.5 mm lead pitch and exposed thermal pad. The package supports automated optical inspection (AOI) and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REXT | Bias current reference terminal | Connects to 10 kΩ 1% precision resistor to GND; sets internal bias current and clamp voltage-no adjustment needed for format changes. |
| 2 - GND | Analog/digital ground reference | Common return path for all internal circuits; must be connected to low-impedance system ground plane to minimize noise coupling into sync outputs. |
| 3 - VCC | Positive supply rail | Accepts 3.3V or 5V; requires local 0.1 µF ceramic bypass capacitor to GND for stable operation under fast video transients. |
| 4 - VIN | Analog video input | AC-coupled input for CVBS, Y/C, YPbPr, or RGBs signals; supports 75 Ω terminated sources and tolerates non-terminated conditions up to 1 VPP. |
| 5 - HD | HD detect flag output | Active-low open-drain CMOS output; asserts logic low only when valid tri-level sync (720P/1080I/P) is detected-used to control external chroma filter switches. |
| 6 - HSOUT | Horizontal sync output | Negative-polarity CMOS HSync; leading edge aligned to input sync reference (OH) with format-specific delay-optimized for negative-edge-triggered PLLs. |
| 7 - VSOUT | Vertical sync output | Negative-polarity CMOS VSync; 3H-width pulse derived from first vertical serration or default edge during non-serrated inputs-synchronizes frame start in display pipelines. |
| 8 - CSOUT | Composite sync output | Clamped replica of input sync waveform below blanking level; preserves bi/tri-level structure for downstream sync regeneration or monitoring. |
| 9 - BPOUT | Burst/back porch timing output | Negative-polarity pulse timed to color burst envelope (SD/EDTV) or short back porch (HDTV); used for burst gating, black level clamping, or sync stripping. |
| 10 - OEOUT | Odd/even field identification | Logic high during odd field (interlaced/sF), constant high for progressive formats; transitions align with VSync leading edge-enables field-aware video processing. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-detecting SD/HD/PC video format | Eliminates manual configuration or firmware updates-device identifies NTSC, PAL, 480I/P, 720P, 1080I/P, and VESA timings autonomously upon signal application. |
| Fixed-level sync slicing (70 mV above clamp) | Removes dependency on input amplitude variation; maintains consistent sync extraction across 0.5–2 VPP signals without recalibration. |
| CMOS logic outputs with <60 ns HSync delay (HDTV) | Enables direct connection to FPGA or ASIC timing inputs without additional buffering or delay compensation circuits. |
| HD detect flag with hardware control capability | Drives transistor switches to enable/disable SD chroma filters-reduces design complexity versus microcontroller-based format management. |
| VSSOP-10 package with thermal pad | Supports high-density PCB layouts in space-constrained video modules while maintaining thermal performance up to +85°C ambient. |
Applications
| Genlock Timing Systems | Automotive LCD Video Monitors |
|---|---|
|
Use Scenario: Synchronizing multiple video sources (e.g., camera feeds, graphics overlays) to a common reference clock in broadcast switchers or production switchers. IC Role / Device Role / Timing Role: LMH1980MMX/NOPB extracts clean, low-jitter HSync and VSync from incoming video to serve as phase-locked loop (PLL) reference inputs for clock synthesizers. Use Value: Sub-100 ns HSync propagation delay and deterministic lock time ensure tight inter-source alignment (<±1 line) without frame buffer resampling. |
Use Scenario: Driving rear-seat entertainment displays in vehicles receiving analog video from backup cameras, DVD players, or navigation systems. IC Role / Device Role / Timing Role: LMH1980MMX/NOPB separates sync signals from composite or component video inputs to drive display controller timing engines. Use Value: −40°C to +85°C operation and robust sync detection across varying cable lengths and termination mismatches prevent display flicker or loss-of-sync in automotive environments. |
| Machine Vision Inspection Systems | Video Capture & Editing Hardware |
|
Use Scenario: Triggering high-speed image acquisition in factory automation using analog video from industrial cameras with non-standard sync. IC Role / Device Role / Timing Role: LMH1980MMX/NOPB generates reliable VSync pulses even for non-serrated video inputs, enabling precise frame-start triggering for image sensors. Use Value: Default VSync generation and burst/back porch output allow synchronization of strobe lighting and sensor exposure windows without external timing generators. |
Use Scenario: Digitizing legacy analog video sources (VCRs, camcorders) into USB/FireWire capture devices supporting SD and HD formats. IC Role / Device Role / Timing Role: LMH1980MMX/NOPB provides composite, horizontal, and vertical sync outputs to coordinate ADC sampling clocks and frame buffers. Use Value: Automatic format detection allows single-hardware support for NTSC, PAL, 480P, 720P, and 1080I without user-selectable jumpers or configuration software. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog video sync separation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM1881N/NOPB | Requires external RSET resistor adjustment per video line rate; no HD tri-level sync support; only SD bi-level compatible. | Limited to NTSC/PAL/480I applications; cannot process 720P/1080I/P signals or auto-detect format changes. | Select LM1881N/NOPB only for cost-sensitive SD-only designs where format stability is guaranteed and layout space permits RSET tuning. |
| MAX9526ETM+ | Integrated ADC and digital video decoder; outputs parallel YUV data and embedded sync; no discrete CMOS sync outputs. | Targets digitization + decoding workflows-not pure sync extraction; requires host processor for register configuration. | Choose MAX9526ETM+ when full video digitization is required; avoid if only clean, low-latency sync signals are needed for external timing logic. |
Compared with LM1881N/NOPB and MAX9526ETM+, the LMH1980MMX/NOPB uniquely delivers format-agnostic sync extraction with zero-config CMOS outputs, making it optimal for hybrid SD/HD systems requiring deterministic timing, minimal BOM count, and hardware-driven format adaptation.
Availability
LMH1980MMX/NOPB is available at Aetrix Electronics and suitable for automotive LCD monitors, video capture hardware, and machine vision inspection systems requiring stable component supply, long-lifecycle availability, and guaranteed RoHS compliance.
Supply support for LMH1980MMX/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in video signal conditioning and timing ICs.
The LMH1980MMX/NOPB belongs to TI's high-performance video interface product line, engineered specifically for robust sync separation in mixed-format analog video systems-from consumer STBs to industrial machine vision platforms.
FAQ
What video standards does the LMH1980MMX/NOPB support?
The LMH1980MMX/NOPB supports NTSC (SMPTE 170M), PAL (ITU-R BT.470), SDTV (480I/P, 576I/P), EDTV (480P, 576P), HDTV (720P, 1080I/P/PsF), and VESA PC graphics formats. It accepts composite (CVBS), S-video (Y/C), component (YPbPr/GBR), and RGBs inputs with both bi-level and tri-level sync structures-fully documented in the SNLS263A datasheet.
Does the LMH1980MMX/NOPB require external resistors for format selection?
No-the LMH1980MMX/NOPB uses a fixed 10 kΩ 1% REXT resistor solely to set internal bias current and clamp voltage; it does not require resistor changes for format switching. Unlike legacy sync separators such as the LM1881, the LMH1980MMX/NOPB performs automatic SD/HD/PC detection without external configuration or microcontroller intervention.
How does the HD detect flag (pin 5) behave during format transitions?
The HD flag on the LMH1980MMX/NOPB outputs logic high by default and transitions to logic low only after detecting a valid tri-level sync input (e.g., 720P, 1080I/P). This transition occurs within 1–2 video fields after signal stabilization and enables hardware control of external SD chroma filters-ensuring correct filtering state without software polling.
What is the maximum propagation delay for horizontal sync output in HDTV mode?
In HDTV mode (e.g., 1080I input), the LMH1980MMX/NOPB specifies a typical horizontal sync propagation delay (tdHSOUT) of 60 ns from the input sync leading edge. This value is measured at VCC = 3.3 V and TA = 25°C per Table 3 of the SNLS263A datasheet and remains stable across the full operating temperature range.
Can the LMH1980MMX/NOPB handle non-standard video signals without vertical serration pulses?
Yes-the LMH1980MMX/NOPB generates a default vertical sync pulse aligned to the input's vertical sync leading edge when no serration pulses are present (e.g., logical OR of H and V signals). This behavior ensures continuous VSync output for non-standard or custom video sources, preserving frame synchronization in video trigger oscilloscopes and waveform monitors.
LMH1980MMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Separator
- Applications:
- Professional Video
- Standards:
- NTSC, PAL
- Control Interface:
- -
- Voltage - Supply:
- 3.3V ~ 5V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-VSSOP
LMH1980MMX/NOPB FAQ
1.How can I place an order for LMH1980MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH1980MMX/NOPB 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 LMH1980MMX/NOPB reliable?
The price and inventory of LMH1980MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH1980MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH1980MMX/NOPB?
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4.How is shipping managed for LMH1980MMX/NOPB?
LMH1980MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH1980MMX/NOPB 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 LMH1980MMX/NOPB?
For technical support, including LMH1980MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH1980MMX/NOPB requirements.
6.How does Aetrix verify that LMH1980MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH1980MMX/NOPB 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 LMH1980MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH1980MMX/NOPB?
All LMH1980MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH1980MMX/NOPB, 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 LMH1980MMX/NOPB part is unused and in its original packaging.
Return procedure for LMH1980MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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