MB3771

Document Number: 002-08511 Rev. *A

Page 2 of 24

Contents

Pin Assignment ................................................................ 3

Block Diagram .................................................................. 3

Functional Descriptions ................................................... 4

Function Explanation ....................................................... 4

Absolute Maximum Ratings ............................................ 5

Recommended Operating Conditions ............................ 5

Electrical Characteristics ................................................. 6

DC Characteristics ...................................................... 6

AC Characteristics ....................................................... 7

Application Circuit............................................................ 8

5V Power Supply Monitor............................................ 8

5V Power Supply Voltage Monitor

(Externally Fine-Tuned Type) ...................................... 8

Arbitrary Voltage Supply Monitor ................................. 9

5 V and 12 V Power Supply Monitor (2 types of power

supply monitor VCC1 = 5 V, VCC2 =12 V) ................ 10

5 V and 12 V Power Supply Monitor (RESET signal

is generated by 5 V, VCC1 = 5 V, VCC2 = 12 V) ...... 10

5 V Power Supply Monitor with forced RESET

input (VCC = 5 V) ...................................................... 11

5 V Power Supply Monitor with

Non-inverted RESET ................................................. 11

Supply Voltage Monitoring with Delayed Trigger ...... 11

Dual (Positive/Negative) Power Supply

Voltage Monitoring (VCC = 5 V,

VEE = Negative Power Supply) ................................ 12

Reference Voltage Generation and

Voltage Sagging Detection ........................................ 12

Low Voltage and Over Voltage

Detection (VCC = 5 V) ............................................... 14

Detection of Abnormal State of Power

Supply System (VCC = 5 V) ...................................... 14

Back-up Power Supply System (VCC = 5 V) ............ 15

Typical Characteristics .................................................. 17

Notes on Use ................................................................... 19

Ordering Information ...................................................... 19

RoHS Compliance Information of

Lead (Pb) Free version ................................................... 19

Marking Format (Lead Free version) ........................... 20

Labeling Sample (Lead free version) ........................... 20

MB3771PF-

❏❏❏E1 Recommended Conditions

of Moisture Sensitivity Level ......................................... 21

Package Dimensions ...................................................... 22

Document History ........................................................... 23