Tsum1pfr-lf Datasheet Jun 2026

Specified for an extended range of -40°C to 105°C (TA).

From a functional perspective, the chip can be understood as a complete "display controller." It receives a raw video signal from the computer's graphics card, processes it to correct and enhance the image, and then converts it into the correct format needed to be displayed on the LCD panel.

| Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | VCC | Supply voltage (12V typical, 20V max) | | 2 | GND | Ground reference | | 3 | FB | Feedback input from output voltage divider | | 4 | COMP | Compensation pin for loop stability | | 5 | CS | Current sense input (external resistor to GND) | | 6 | OUT | Gate drive output for external MOSFET |

Firmware can typically be updated or programmed via the using an ISP (In-System Programming) tool, as supported by the MST architecture. For repair purposes, BIOS dumps from working monitors are often shared on technical forums such as ChinaFix and elektronik.si.

LVDS differential pairs (TX0± up to TX3± along with clock pairs) route digital data directly to the LCD panel T-CON board. System Control Pins: Encompasses Reset ( ), Crystal Oscillator ( XI/XOXI/XO ), flash memory program channels ( interface), and user interface key matrices. Power Rails: Split digital power ( VCC_DVCC_D ), analog power ( VCC_AVCC_A ), and dedicated ground lines ( ) isolate internal switching noise. Common Applications Tsum1pfr-lf Datasheet

is built for high-speed signal switching and power efficiency. MStar Semiconductor Package Type: 64-pin LQFP (Low-profile Quad Flat Package) Resolution Support: Up to WXGA+ / SXGA+ Operating Voltage: Typically 1.8V to 5.5V Operating Temperature: -40°C to 105°C (TA)

| Pin No. | Symbol | Function Description | |---------|--------|----------------------| | 1 | VIN | Input voltage supply. Bypass with 1µF ceramic capacitor to GND. | | 2 | GND | Ground connection. Connected to thermal pad if present. | | 3 | EN | Enable pin. Active high (logic >1.2V). Tie to VIN if unused. | | 4 | NC / BYP | No connect or bypass capacitor pin for noise reduction. | | 5 | VOUT | Regulated output voltage. Output capacitor (1µF to 10µF) required. |

TOP VIEW (LQFP-64) +----------------+ 64 | | 49 | MStar | 1 | TSUM1PFR-LF | 48 | | | | 16 | | 33 +----------------+ 17 32

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Powers rugged, low-power Human-Machine Interfaces (HMIs) and point-of-sale kiosks.

The TSUM1PFR-LF is a dedicated that integrates multiple critical functions into a single chip. It is designed to receive analog and digital video signals, process them, and output them to the LCD panel via standard interfaces.

An embedded MCU handles the display's On-Screen Display (OSD) menus, reads EDID profiles over DDC, and controls user settings like brightness and contrast.

Since "Tsum1pfr-lf" is obscure, follow this 4-step process: Specified for an extended range of -40°C to 105°C (TA)

The 64-pin configuration on the TSUM1PFR-LF LQFP package is divided into clear functional groups to simplify layout design on double-sided PCBs:

The TSUM1PFR-LF supports an output interface, a standard interface used to connect the main board to the LCD panel.

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.