Features: Power-On Reset Generator Automatic Reset Generation After Voltage Drop Precision Voltage Sensor Temperature-Compensated Voltage Reference Programmable Delay Time by External Capacitor Supply Voltage Range . . . 2 V to 6 V Defined RESET Output from VDD1 V Power-Down Control Support for...
TLC7701: Features: Power-On Reset Generator Automatic Reset Generation After Voltage Drop Precision Voltage Sensor Temperature-Compensated Voltage Reference Programmable Delay Time by External Capacitor Sup...
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ADC (A/D Converters) 4.5-Bits 0.003 kSPS Muxed BCD Out
The TLC7701 family of micropower supply voltage supervisors provide reset control, primarily in microcomputer and microprocessor systems.
During power-on, RESET is asserted when VDD reaches 1 V. After minimum VDD (2 V) is established, the circuit monitors SENSE voltage and keeps the reset outputs active as long as SENSE voltage (VI(SENSE)) remains below the threshold voltage. An internal timer delays return of the output to the inactive state to ensure proper
system reset. The TLC7701 delay time, td, is determined by an external capacitor:
td = 2.1 * 104 * CT
Where
CT is in farads
td is in seconds
Except for the TLC7701, which can be customized with two external resistors, each supervisor has a fixed SENSE threshold voltage set by an internal voltage divider. When SENSE voltage drops below the threshold voltage, the outputs become active and stay in that state until SENSE voltage returns above threshold voltage and the delay time, td, has expired.