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| (R) TL7700A Series SUPPLY VOLTAGE SUPERVISORS .POWER.AUTOMATI .WI .PRECI .TEMPERATURE.TRUE .EXTERNALLY DESCRIPTION ON RESET GENERATOR C RESET GENERATION AFTER VOLTAGE DROP DE SUPPLY VOLTAGE RANGE ... 3V TO 18V SION VOLTAGE SENSOR COMPENSATED VOLTAGE REFERENCE AND COMPLEMENT RESET OUTPUTS ADJUSTABLE PULSE WIDTH N Minidip 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 F) 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. D SO8 ORDERING NUMBERS Temperature Range 0 to 70 C -25 to 85oC o Minidip TL77XXACP TL77XXAIP S08 TL77XXACD TL77XXAID PIN CONNECTION (top view) July 2000 1/7 TL7700A Series BLOCK DIAGRAM * TL7702A R1 = 0, R2 = open ; TL7705A R1 = 7.8 K, R2 = 10k ; TL7709A R1 = 19.7 K, R2 = 10k ; TL7712A R1 = 32.7k, R2 = 10k ; TL7715A R1 = 43.4 K, R2 = 10k. ABSOLUTE MAXIMUM RATINGS Symbol VS Vi Vi IOH IOL Tamb Parameter Supply Voltage, VCC - (see note 1) Input Voltage Range at RESIN Input Voltage at SENSE : High-level Output Current at RESET Low-level Output Current at RESET Operating Free-air Temperature Range : TL77XXAI TL77XXAC Storage Temperature Range TL7702A (see note 2) TL7705A Value 20 -0.3 to 20 -0.3 to 6 -0.3 to 10 -30 30 -25 to 85 0 to 70 -65 to 150 o Unit V V V mA mA o C Tstg 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 Vs. THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance Junction-ambient Max. Value 120 Unit o C/W RECOMMENDED OPERATING CONDITIONS Symbol VS VIH VIL Vi IOH IOL Tamb Note : Parameter Supply Voltage High-level Input Voltage at RESIN Low-level Input Voltage at RESIN Voltage at Sense Input High-level Output Current at RESET Low-level Output Current at RESET Operating Free-air Temperature Range TL77-AI TL77-AC TL7702A TL7705A Min. 3.6 2 Max. 18 0.6 Unit V V V V mA mA o 0 0 See note 3 10 -16 16 -25 0 85 70 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. 2/7 TL7700A Series ELECTRICAL CHARACTERISTICS these specifications unless otherwise specified, apply for : Tamb = -25 to 85oC (TLXXAI), Tamb = 0 to 70oC (TL77XXAC) Symbol VOH VOL Vref VT VT VT+, VT- II II IOH IOL IS Parameter High-level Output Voltage at RESET Low-Level Output Voltage at RESET Reference Voltage Threshold Voltage at SENSE Input Threshold Voltage at SENSE Inpu Hysteresis (2) at SENSE Input Input Current at RESIN Input Input Current at SENSE Input High-level Output Current at RESET Low-level Output Current at RESET Supply Current TL7702A TL7702A TL7705A TL7702A TL7705A TL7702A TL7705A Test Conditions (1) IOH = -16mA IOL = 16mA T amb = 25 C Vs = 3.6V to 18V Tamb = 25oC Vs = 3.6V to 18V Vs = 3.6V to 18V Tamb = 25oC Vi = 2.4V to VS Vi = 0.4V Vref < Vi < Vs - 1.5V VO = 18V VO = 0V All Inputs and out. open o Min. Vs 1.5 Typ. Max. Unit V 0.4 2.48 2.48 4.5 2.45 4.45 2.53 2.53 4.55 2.53 4.55 10 15 20 -100 0.5 50 -50 1.8 3.3 2 2.58 2.58 4.6 2.58 4.6 V V V V mV A A A A mA Notes : 1. All characteristics are measured with C = 0.1F from Pin 1 to GND, and with C = 0.1F 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 tpi tpi tpo tpdHL tr/f Parameter Pulse Width at SENSE Input Pulse Width at RESIN Input Pulse Width at Output Propagation Delay Time from RESIN to RESET Rise/Falltime at RESET and RESET CT = 0.1F CL = 100pF, Vs = 5V, RL = 4.7k CL = 10pF, Vs = 5V, RL = 4.7k Test Conditions Vih = Vityp +0.04 x Vi ViL = Vityp -0.04 x Vi Min. 0.9 0.4 0.65 1.3 2.6 1 1 Typ. Max. Unit s s ms s s 3/7 TL7700A Series Figure 1 : Reset Controller for P TL7705 4/7 TL7700A Series DIM. MIN. A a1 a2 a3 b b1 C c1 D (1) E e e3 F (1) L M S 3.8 0.4 4.8 5.8 1.27 3.81 4.0 1.27 0.6 8 (max.) 0.15 0.016 0.65 0.35 0.19 0.25 0.1 mm TYP. MAX. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 0.026 0.014 0.007 0.010 0.004 MIN. inch TYP. MAX. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 OUTLINE AND MECHANICAL DATA 45 (typ.) 5.0 6.2 0.189 0.228 0.050 0.150 0.157 0.050 0.024 0.197 0.244 SO8 (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 MIN. A a1 B b b1 D E e e3 e4 F I L Z 3.18 7.95 2.54 7.62 7.62 6.6 5.08 3.81 1.52 0.125 0.51 1.15 0.356 0.204 1.65 0.55 0.304 10.92 9.75 0.313 0.100 0.300 0.300 0.260 0.200 0.150 0.060 TYP. 3.32 0.020 0.045 0.014 0.008 0.065 0.022 0.012 0.430 0.384 MAX. MIN. inch TYP. 0.131 MAX. DIM. OUTLINE AND MECHANICAL DATA Minidip 6/7 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. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2000 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 7/7 |
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