Quad Supply And Line Monitor

The UC1903 family of quad supply and line monitor integrated circuits will respond to under- and over-voltage conditions on up to four continuously monitored voltage levels. An internal op-amp inverter allows at least one of these levels to be negative. A separate line/switcher sense input is available to provide early warning of line or other power source failures.
The fault window adjustment circuit on these devices provides easy programming of under- and over-voltage thresholds. The thresholds, centered around a precision 2.5V reference, have an input hysteresis that scales with the window width for precise, glitch-free operation. A reference output pin allows the sense input fault windows to be scaled independently using simple resistive dividers.
The three Open Collector outputs on these devices will sink in excess of 30mA of load current when active. The under- and over-voltage outputs respond after separate, user defined, delays to respective fault conditions. The third output is active during any fault condition including under- and over-voltage, line/switcher faults, and input supply under-voltage. The off state of this output indicates a "power OK" situation.
An additional, uncommitted, general purpose op-amp is also included. This op-amp, capable of sourcing 20mA of output current, CAN be used for a number of auxiliary functions including the sensing and amplification of a feed-back error signal when the 2.5V output is used as a system reference.
In addition, these ICs are equipped with a start-latch to prevent erroneous under-voltage indications during start-up. These parts operate over an 8V to 40V input supply range and require a typical stand-by current of only 7mA.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UC3903DWTR Texas Instruments Quad Supply and Line Monitor 18-SOIC 0 to 70
UC3903DWG4 Texas Instruments Quad Supply and Line Monitor 18-SOIC 0 to 70
UC3903L Texas Instruments 4-CHANNEL POWER SUPPLY SUPPORT CKT, CQCC20
UC3903DW Texas Instruments Quad Supply and Line Monitor 18-SOIC 0 to 70
UC3903DWTRG4 Texas Instruments Quad Supply and Line Monitor 18-SOIC 0 to 70
UC3903N Texas Instruments Quad Supply and Line Monitor 18-PDIP 0 to 70
UC3903NG4 Texas Instruments Quad Supply and Line Monitor 18-PDIP 0 to 70
UC3903QG3 Texas Instruments Quad Supply and Line Monitor 20-PLCC 0 to 70
UC3903Q Texas Instruments Quad Supply and Line Monitor 20-PLCC 0 to 70
UC3903QTRG3 Texas Instruments 4-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20, GREEN, PLASTIC, LCC-20
UC3903 's PackagesUC3903 's pdf datasheet
UC3903DW SOIC
UC3903DWG4 SOIC
UC3903DWTR SOIC
UC3903DWTRG4 SOIC
UC3903N PDIP
UC3903NG4 PDIP
UC3903Q PLCC
UC3903QG3 PLCC
UC3903QTRG3 PLCC




UC3903 Pinout, Pinouts
UC3903 pinout,Pin out
This is one package pinout of UC3903,If you need more pinouts please download UC3903's pdf datasheet.

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