1FEATURES
• 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 VDD ≥ 1 V
• Power-Down Control Support for Static RAM
With Battery Backup
• Maximum Supply Current of 16 mA
• Power Saving Totem-Pole Outputs

SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Extended (–40°C/125°C
and –55°C/125°C), Temperature Ranges(1)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability

DESCRIPTION
The TLC77xx 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 delay time (td) is determined by an external capacitor:
td = 2.1 × 104 × CT (1)
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.