器件名称:
TL7770-12N
功能描述:
DUAL POWER-SUPPLY SUPERVISORS
文件大小:
128.74KB 共9页
简 介:
TL7770-5, TL7770-12 DUAL POWER-SUPPLY SUPERVISORS SLVS019F – OCTOBER 1987 – REVISED JULY 1999 D D D D D D D D D D Power-On Reset Generator Automatic Reset Generation After Voltage Drop RESET Defined When VCC Exceeds 1 V Wide Supply-Voltage Range . . . 3.5 V to 18 V Precision Overvoltage and Undervoltage Sensing 250-mA Peak Output Current for Driving SCR Gates 2-mA Active-Low SCR Gate Drive for False-Trigger Protection Temperature-Compensated Voltage Reference True and Complementary Reset Outputs Externally Adjustable Output Pulse Duration DW OR N PACKAGE (TOP VIEW) 1RESIN 1CT 1RESET 1RESET 1VSU 1VSO 1SCR DRIVE GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC 2RESIN 2CT 2RESET 2RESET 2VSU 2VSO 2SCR DRIVE description The TL7770 is an integrated-circuit system supervisor designed for use as a reset controller in microcomputer and microprocessor power-supply systems. This device contains two independent supply-voltage supervisors that monitor the supplies for overvoltage and undervoltage conditions at the VSO and VSU terminals, respectively. When VCC attains the minimum voltage of 1 V during power up, the RESET output becomes active (low). As VCC approaches 3.5 V, the time-delay function activates, latching RESET and RESET active (high and low, respectively) for a time delay (td) after system voltages have achieved normal levels. Above VCC = 3.5 V, taking RESIN low activates the time-delay function during normal system-voltage levels. To ensure that the microcomputer system……
