Tsum1pfr-lf Datasheet !free! <VERIFIED · OVERVIEW>

Note: Actual pinout may vary. Always consult the official datasheet if available.

The TSUM1PFR-LF is designed for devices requiring compact, efficient video processing. Its primary role is to take incoming video signals and "scale" them to fit the specific resolution of an LCD panel. Integrated Architecture:

| Symptom | Possible Cause | Solution | | :--- | :--- | :--- | | Monitor not turning on (no power) | Corrupted flash / Lightning damage | Reprogram or replace EEPROM | | Display resolution incorrect | Wrong firmware for panel | Flash correct firmware matching panel model | | Settings (brightness, contrast) resetting on power cycle | EEPROM write failure | Replace EEPROM (e.g., W25X20) |

An onboard microcontroller handles the top-level execution tasks, reducing external component dependencies: Tsum1pfr-lf Datasheet

| Part Number | Package | Lead-Free | Marking | Reel Quantity | | :--- | :--- | :--- | :--- | :--- | | Tsum1pfr-lf-S | SOT-223 | Yes (LF) | 1PFR | 2,500 | | Tsum1pfr-lf-8 | SOIC-8 | Yes (LF) | T1L | 4,000 |

In the world of electronic design, encountering an unfamiliar part number like is not uncommon. This alphanumeric string suggests a specific component—likely a low-frequency (LF) power filter, a voltage regulator, or a protection IC. The "Tsum" prefix may indicate a custom or proprietary device from a smaller semiconductor house, while "pfr" often hints at Power Factor Regulator or Pulse Frequency Regulator . The "-lf" suffix typically denotes Lead-Free or Low Frequency compliance.

Complies with strict environmental standards by utilizing an intelligent power conservation algorithm that puts the IC into ultra-low-power sleep when no video input is detected. 3. Pinout Profile and Package Configuration Note: Actual pinout may vary

The TSUM1PFR-LF is a capable and widely used legacy graphics processing IC from MStar. Its high level of integration, combining a scalar, ADC, MCU, and LVDS interface into a single LQFP-64 package, made it a favored solution for cost-sensitive LCD monitors and TVs during its active production lifecycle.

| Parameter | Value / Description | | :--- | :--- | | | 1.8V to 5.5V (Typical operating range for I/O) | | Maximum Resolution | 1440×900 @ 60Hz (WXGA+) | | Panel Interface | LVDS (2ch-LVDS supported) | | Package Dimensions | LQFP-64 (14×14mm body, 0.5mm pitch) |

High-speed digital buses, especially the LVDS panel interface, emit sharp peaks of radio frequency energy. The internal PLL features programmable spread-spectrum clocking (SSC). By modulating the clock frequency across a narrow band, peak EMI emissions are minimized, allowing products to clear compliance testing without requiring expensive shielding or ferrite beads. Common Application Engineering Fields Its primary role is to take incoming video

If power dissipation = 0.5W (VCC*ICC + gate drive losses), ΔT = 0.5W * 65°C/W = 32.5°C rise. At 85°C ambient, Tj = 117.5°C (safe within 150°C limit).

Replace defective ICs with a hot-air rework station. Re-flash EEPROMs with a programmer like the RT809F. Have the service manual on hand for your specific monitor chassis (e.g., chassis codes like LM86A, EAX59742701).