20
15.11.3.
Pin Description
15.12. LM809
15.12.1.
General Description
The LM809/810 microprocessor supervisory circuits can be used to monitor the power supplies in microprocessor and
digital systems. They provide a reset to the microprocessor during power-up, power-down and brown-out conditions.
The function of the LM809/810 is to monitor the VCC supply voltage, and assert a reset signal whenever this voltage
declines below the factory-programmed reset threshold. The reset signal remains asserted for 240 ms after VCC rises
above the threshold. The LM809 has an active-low RESET output, while the LM810 has an active-high RESET output.
Seven standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 3V supply voltages. With a
low supply current of only 15µA, the LM809/810 are ideal for use in portable equipment.
15.12.2.
Features
•
Precise monitoring of 3V, 3.3V, and 5V supply voltages
•
Superior upgrade to MAX809/810
•
Fully specified overtemperature
•
140 ms min. Power-On Reset pulse width, 240 ms typical
Active-low RESET Output(LM809)
Active-high RESET Output(LM810)
•
Guaranteed RESET Output valid for VCC
≥
1V
•
Low Supply Current, 15µAtyp
•
Power supply transient immunity
15.12.3.
Pinning
15.13. MSP34X1G
(MSP3411G)
Multistandard Sound Processor Family
Summary of Contents for 17MB15E-5
Page 1: ...i 42 PLASMA TV 17MB15E 5 SERVICE MANUAL ...
Page 38: ...33 15 27 3 Pinning ...
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Page 62: ...57 18 APPENDIX A 18 1 EXPLODED VIEW AND PART LIST ...
Page 64: ...59 19 2 16 ELECTRICALDIAGRAMS 19 2 1 POWER BOARD ...
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Page 80: ...73 19 4 PRINT_LAY OUTS 19 4 1 Complete_PCB_Pattern_Schematic ...
Page 81: ...74 19 4 3 In 1_Ground_Level_PCB_Pattern ...
Page 82: ...75 19 4 4 In2_Power_Level_PCB_Patter ...
Page 83: ...76 19 4 5 Bottom_ Level_ PCB_ Pattern ...
Page 84: ...77 19 4 6 Top_Layer_Silk_Print ...
Page 85: ...78 19 4 7 Bottom_Layer_Silk_Print ...
Page 86: ...79 19 4 8 Topmask lgx ...
Page 87: ......
Page 88: ...81 19 4 10 17fav15 2pcb ...
Page 89: ...82 19 4 11 18amp05 2 pcb ...