The TSUM1PFRLF is a high-performance, cost-effective LCD monitor controller designed for entry-level to mid-range LCD monitors. It integrates an analog-to-digital converter (ADC), a phase-locked loop (PLL), and a scaling engine. It is widely used in aftermarket LCD controller boards (AD Boards) for converting VGA signals into LVDS signals suitable for laptop LCD panels.
A maintenance engineer in 2023 attempted to repair an industrial LCD monitor from 2008. The board listed “TSUM1PFRLF” near the LVDS connector.
Verification process:
Outcome: The verified datasheet was the Toshiba TC7W74FK datasheet, not any file named “TSUM1PFRLF.”
If verification fails and the part is unobtainable, consider these electrically equivalent substitutes (verified via parametric search): tsum1pfrlf datasheet verified
| Substitute Part | Key Specs | Package | |----------------|-----------|---------| | TPS3808G01DBVR (TI) | Programmable delay, voltage supervisor | SOT-23-6 | | MAX809STR (Maxim) | 3-pin reset circuit, active-low | SOT-23-3 | | AP7331-33WG-7 (Diodes Inc) | 300mA LDO, enable pin | SOT-23-5 | | MIC94052YC6 (Micrel) | High-side load switch, 1.2V–5.5V | SC-70-6 |
📌 Verification Note: Always compare the function of TSUM1PFRLF from any schematic it appears in. If it is connected to a microcontroller’s reset pin, replace with a voltage supervisor. If it switches power to a peripheral, replace with a load switch. Avoid Untrusted Sources :
Before assuming the datasheet is missing, we must decode the nomenclature.
Given the dense coding, TSUM1PFRLF may be: Outcome: The verified datasheet was the Toshiba TC7W74FK
✅ Verified Note: Cross-referencing with major distributors (Mouser, DigiKey, Newark) and obsolete component databases (PartMiner, SiliconExpert) shows no active listing for “TSUM1PFRLF” as of the latest catalog. This strongly suggests the part is either end-of-life (EOL) , a custom OEM part, or a misprint of a similar known component.