Power-On Reset Generator Automatic Reset Generation After Voltage Drop RESET Output Defined From VCC 1 V Precision Voltage Sensor
Temperature-Compensated Voltage Reference True and Complement Reset Outputs Externally Adjustable Pulse Duration
The TL7702B, TL7705B, and TL7733B are integrated-circuit supply-voltage supervisors designed for use as reset controllers in microcomputer and microprocessor systems. The supply-voltage supervisor monitors the supply for undervoltage conditions at the SENSE input. During power up, the RESET output becomes active (low) when VCC attains a value approaching V. As VCC approaches 3 V (assuming that SENSE is above VT+), the delay-timer function activates a time delay, after which outputs RESET and RESET go inactive (high and low, respectively). When an undervoltage condition occurs during normal operation, outputs RESET and RESET go active. To ensure that a complete reset occurs, the reset outputs remain active for a time delay after the voltage at the SENSE input exceeds the positive-going threshold value. The time delay is determined by the value of the external capacitor CT: td CT, where is in farads (F) and is in seconds (s). An external capacitor (typically 0.1 �F) must be connected to REF to reduce the influence of fast transients in the supply voltage. The TL7702BC, TL7705BC, and TL7733BC are characterized for operation from to 70�C. The TL7702BI, TL7705BI, and TL7733BI are characterized for operation from to 85�C. The TL7705BQ is characterized for operation from to 125�C. The TL7705BM is characterized for operation from to 125�C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
TA PDIP (P) SOIC (D) PDIP (P) to 70�C SOIC (D) PDIP (P) SOIC (D) PDIP (P) SOIC (D) PDIP (P) to 85�C SOIC (D) PDIP (P) SOIC (D) PACKAGE Tube of 50 Tube of 75 Reel of 2500 Tube of 50 Tube of 75 Reel of 2500 Tube of 50 Tube of 75 Reel of 2500 Tube of 50 Tube of 75 Reel of 2500 Tube of 50 Tube of 75 Reel of 2500 Tube of 50 Tube of 75 Reel of 2500 ORDERABLE PART NUMBER TL7733BID TL7733BIDR TOP-SIDE MARKING TL7705BIP 7733BI
to 125�C SOIC (D) Tube 75 TL7705BQD Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
The functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimming network to adjust the reference voltage and sense-comparator trip point.Reference Voltage 1 CT SENSE R1 (see Note 7 Vx Reference Voltage 2
R2 (see Note A) 2 RESIN 1 4 GND Pin numbers shown are for the D, JG, and P packages. NOTE R2 = open, 10 k, nominal, 10 k, nominal, 1.43 V REFVCC and SENSE VIT+ Vres 0 RESET td VIT� Vres