U641B-M small printed circuit board Interval and Wipe / Wash Wiper Control IC with Delay
circuit board ic
,electronic components ic
Features
• Interval Pause: 4s to 20s
• After-wiping Time: 2s to 20s
• Wiper Motor’s Park Switch
• 0.6s Prewash Delay
• Wipe/Wash Mode Priority
• One External Capacitor Determines All Time Sequences
• Relay Driver with Z-diode
• Interference Protection According to VDE 0839 or ISO/TR 7637/1
• Load-dump Protected
Description
The U641B is a bi-polar integrated circuit designed for the wiper application in the automotive market. It includes wipe, wash and internal mode.
Functional Description
As a convenience feature of the windshield wiper, intermittent and wipe/wash operation functions are implemented in most of the automobiles. The U641B is a costeffective solution for an accurate timing function control. Wipe/wash mode has priority over interval mode. Interval pause and after-wiping time can be set to fixed values by using resistors in a broad time range. Added value can be provided with an individual, continuous adjustment of the interval pause by a potentiometer which may be built into the stalk. For proper operation, it is mandatory to feed the signal of the wiper motor's park switch into the U641B.
Figure 2-1. Block Diagram
STOCK LIST
| MIC811LUY | 10000 | MICREL | 16+ | SOT-143 |
| BD9778F-E2 | 5500 | ROHM | 16+ | SOP-8 |
| PIC18F25K20-I/ML | 4553 | MICROCHIP | 14+ | QFN |
| 74LVXC3245MTCX | 7500 | FAIRCHILD | 15+ | TSSOP |
| 2SC3964 | 3000 | TOSHIBA | 16+ | TO-126 |
| 2SD1408Y | 3000 | TOSHIBA | 16+ | TO-220F |
| 10TPB47M | 9000 | SANYO | 16+ | SMD |
| F931A106MAA | 1950 | NICHILON | 14+ | SMD |
| AM26LS32ACNSR | 1600 | TI | 13+ | SOP-16 |
| 10TPC68M | 9000 | SANYO | 15+ | SMD |
| 10TPB33M | 9000 | SANYO | 15+ | SMD |
| A6251M | 5800 | SANKEN | 11+ | DIP-8 |
| A6251M | 2230 | SANKEN | 16+ | DIP-8 |
| H1061 | 3460 | HIT | 14+ | TO-220 |
| XC5CSX95T-2FF1136I | 100 | XILINX | 15+ | BGA |
| FSDM0265RN | 3460 | FAIRCHILD | 16+ | DIP-8 |
| MOC3083 | 5588 | FSC | 16+ | DIP |
| GP1A52HRJ00F | 3460 | SHARP | 15+ | DIP |
| PIC24FJ128GB106-I/PT | 4173 | MICROCHIP | 15+ | TQFP |
| C393C | 1380 | NEC | 16+ | DIP-8 |
| DS1220AD-100IND+ | 500 | DALLAS | 15+ | DIP-24 |
| ME15N10-G | 5956 | MATSU | 16+ | TO-252 |
| D3SB60 | 2200 | SHINDENGE | 14+ | TO-220 |
| FT2232D | 3460 | FTDI | 14+ | QFP |
| BCV49 | 8000 | INF | 16+ | SOT-89 |
| 2SA1941+2SC5198 | 3000 | TOSHIBA | 16+ | TO-3P |
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