TL7700A Series ® SUPPLY VOLTAGE SUPERVISORS .. . .. .. POWER-ON RESET GENERATOR AUTOMATIC RESET GENERATION AFTER VOLTAGE DROP WIDE SUPPLY VOLTAGE RANGE ... 3V TO 18V PRECISION VOLTAGE SENSOR TEMPERATURE-COMPENSATED VOLTAGE REFERENCE TRUE AND COMPLEMENT RESET OUTPUTS EXTERNALLY ADJUSTABLE PULSE WIDTH N Minidip DESCRIPTION The TL7700A series are monolithic supply voltage supervisor IC’s specifically designed for use as reset controllers in microcomputer and microprocessor systems. During power-up the device tests the supply voltage and keeps the RESET and RESET outputs active (high and low, respectively) as long as the supply voltage has not reached its nominal voltage value. Taking RESIN low has the same effect. To ensure that the microcomputer system has reset, the TL7700A then initiates an internal time count that delays the return of the reset outputs to their inactive states. Since the time delay for most microcomputers and microprocessors is in the order of several machine cycles, the device internal time delay is determined by an external capacitor connected to the CT input (pin 3). tpo = 1.3 x 104 x CT Where : CT is in farads (F) and tpo in seconds (s). In addition, when the supply voltage drops below the nominal value, the outputs will be active until the supply voltage returns to the nominal value. An external capacitor (typically 0.1 µF) must be connected to the REF output (pin 1) to reduce the influence of fast transients in the supply voltage. The TL7700AI series is characterized for operation from – 25oC to 85oC ; the TL7700AC series is characterized from 0oC to 70oC. July 2000 D SO8 ORDERING NUMBERS Temperature Range o Minidip S08 0 to 70 C TL77XXACP TL77XXACD -25 to 85oC TL77XXAIP TL77XXAID PIN CONNECTION (top view) 1/7 TL7700A Series BLOCK DIAGRAM * TL7702A R1 = 0Ω, R2 = open ; TL7705A R1 = 7.8 KΩ, R2 = 10kΩ ; TL7709A R1 = 19.7 KΩ, R2 = 10kΩ ; TL7712A R1 = 32.7kΩ, R2 = 10kΩ ; TL7715A R1 = 43.4 KΩ, R2 = 10kΩ. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit 20 V -0.3 to 20 V -0.3 to 6 -0.3 to 10 V VS Supply Voltage, VCC - (see note 1) Vi Input Voltage Range at RESIN Vi Input Voltage at SENSE : IOH High-level Output Current at RESET -30 mA IOL Low-level Output Current at RESET 30 mA Tamb Tstg TL7702A (see note 2) TL7705A Operating Free-air Temperature Range : TL77XXAI TL77XXAC -25 to 85 0 to 70 Storage Temperature Range -65 to 150 o C o C Notes : 1. All voltage values are with respect to the network ground terminal 2. For the TL7700A, the voltage applied to the SENSE terminal must never exceed V s. THERMAL DATA Symbol Rth j-amb Parameter Value Thermal Resistance Junction-ambient Max. Unit o 120 C/W RECOMMENDED OPERATING CONDITIONS Symbol Min. Max. Unit 3.6 18 V Supply Voltage VIH High-level Input Voltage at RESIN VIL Low-level Input Voltage at RESIN Vi Voltage at Sense Input IOH High-level Output Current at RESET -16 mA IOL Low-level Output Current at RESET 16 mA 85 70 o Tamb Note : 2/7 Parameter VS 2 TL7702A TL7705A Operating Free-air Temperature Range TL77-AI TL77-AC 0 0 -25 0 V 0.6 V See note 3 10 V C 3. For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed Vs - 1V or 6V, which ever is less. TL7700A Series ELECTRICAL CHARACTERISTICS these specifications unless otherwise specified, apply for : Tamb = –25 to 85oC (TLXXAI), Tamb = 0 to 70oC (TL77XXAC) Symbol Parameter Test Conditions (1) Min. Vs 1.5 VOH High-level Output Voltage at RESET IOH = –16mA VOL Low-Level Output Voltage at RESET IOL = 16mA o Typ. Max. Unit V 0.4 V Vref Reference Voltage T amb = 25 C 2.48 2.53 2.58 V VT Threshold Voltage at SENSE Input TL7702A TL7705A Vs = 3.6V to 18V Tamb = 25oC 2.48 4.5 2.53 4.55 2.58 4.6 V VT Threshold Voltage at SENSE Inpu TL7702A TL7705A Vs = 3.6V to 18V 2.45 4.45 2.53 4.55 2.58 4.6 V Hysteresis (2) at SENSE Input TL7702A TL7705A Vs = 3.6V to 18V Tamb = 25oC VT+, VT– II Input Current at RESIN Input II Input Current at SENSE Input Vi = 2.4V to VS Vi = 0.4V TL7702A Vref < Vi < Vs - 1.5V 10 15 mV 20 -100 µA 0.5 IOH High-level Output Current at RESET VO = 18V 50 IOL Low-level Output Current at RESET VO = 0V -50 IS Supply Current All Inputs and out. open 1.8 2 µA µA µA 3.3 mA Notes : 1. All characteristics are measured with C = 0.1µF from Pin 1 to GND, and with C = 0.1µF from Pin 3 to GND. 2. Hysteresis is the difference between the positive going input threshold voltage. V T+, and the negative going input threshold voltage, VT-. SWITCHING CHARACTERISTICS Symbol Parameter tpi Pulse Width at SENSE Input tpi Pulse Width at RESIN Input tpo Test Conditions Min. Vih = Vityp +0.04 x Vi ViL = Vityp –0.04 x Vi 0.9 Pulse Width at Output CT = 0.1µF 0.65 tpdHL Propagation Delay Time from RESIN to RESET tr/f Rise/Falltime at RESET and RESET Typ. Max. Unit µs µs 0.4 1.3 2.6 ms CL = 100pF, Vs = 5V, RL = 4.7kΩ 1 µs CL = 10pF, Vs = 5V, RL = 4.7kΩ 1 µs 3/7 TL7700A Series Figure 1 : Reset Controller for µP TL7705 4/7 TL7700A Series mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.25 a2 MAX. 0.069 0.004 0.010 1.65 0.065 a3 0.65 0.85 0.026 0.033 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.020 c1 45° (typ.) D (1) 4.8 5.0 0.189 0.197 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F (1) 3.8 4.0 0.15 0.157 L 0.4 1.27 0.016 0.050 M S OUTLINE AND MECHANICAL DATA 0.6 0.024 SO8 8 ° (max.) (1) D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). 5/7 TL7700A Series mm DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.51 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 E 0.020 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 3.18 OUTLINE AND MECHANICAL DATA 0.131 a1 D 6/7 inch 3.81 1.52 0.125 0.150 0.060 Minidip TL7700A Series Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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