TL7700A Series
April 2000
SUPPLY VOLTAGE SUPERVISORS
.POWER-ONRESET GENERATOR
.AUTOMATIC RESET GENERATION AFTER
VOLTAGEDROP
.WIDE SUPPLY VOLTAGE RANGE ... 3V TO
18V
.PRECISIONVOLTAGESENSOR
.TEMPERATURE-COMPENSATED VOLTAGE
REFERENCE
.TRUE AND COMPLEMENT RESETOUTPUTS
.EXTERNALLYADJUSTABLEPULSE WIDTH N
Minidip
DESCRIPTION
TheTL7700Aseriesaremonolithicintegratedcircuit
supplyvoltagesupervisorsspecificallydesi-gnedfor
use as reset controllers in microcomputer and mi-
croprocessorsystems.During power-upthedevice
teststhesupplyvoltageand keepstheRESETand
RESET outputsactive (high and low, respectively)
as long as the supply voltage has not reached its
nominal voltage value. Taking RESIN low has the
sameeffect.Toensurethatthemicrocomputersys-
temhasreset,theTL7700Atheninitiatesaninternal
timedelaythatdelaysthereturnoftheresetoutputs
totheirinactivestates.Sincethetimedelayformost
microcomputersandmicroprocessorsisintheorder
of several machine cycles, the device internaltime
delayisdeterminedby an externaltime delayisde-
terminedby an externalcapacitorconnectedto the
CTinput(pin3).
td=1.3 x 104xC
T
Where: CTis in farads(F) and tdinseconds (s). In
addition,when the supply voltage drops below the
nominal value, the outputs will be active until the
supplyvoltagereturns to the nominalvalue. An ex-
ternalcapacitor(typically0.1µF)mustbeconnected
to theREF output(pin 1) to reducetheinfluenceof
fasttransientsin the supply voltage.
The TL7700AIseries ischaracterizedfor operation
from–25oCto85
o
C ;theTL7700ACseriesis char-
acterizedfrom0oCto70
o
C.
D
SO8
ORDERING NUMBERS
Temperature Range Minidip S08
0to70
o
C TL77XXACP TL77XXACD
-25 to 85oC TL77XXAIP TL77XXAID
PIN CONNECTION (top view)
1/7
*TL7702A R1 =0Ω, R2 = open ; TL7705A R1 = 7.8KΩ, R2 = 10kΩ;TL7709AR1 = 19.7KΩ,R2 = 10kΩ;
TL7712A R1 = 32.7kΩ, R2= 10kΩ; TL7715A R1 = 43.4KΩ, R2= 10kΩ.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VSSupply Voltage, VCC - (see note 1) 20 V
ViInput Voltage Range at RESIN -0.3 to 20 V
ViInput Voltage at SENSE : TL7702A (see note 2)
TL7705A -0.3 to 6
-0.3 to 10 V
IOH High-level Output Current at RESET -30 mA
IOL Low-level Output Current at RESET 30 mA
Tamb Operating Free-air Temperature Range :TL77XXAI
TL77XXAC -25 to 85
0to70
o
C
T
stg Storage Temperature Range -65 to 150 oC
Notes: 1. All voltage values are with respect to thenetwork ground terminal
2. For the TL7700A, thevoltage applied to theSENSE terminal must never exceed Vs.
THERMAL DATA
Symbol Parameter Value Unit
Rth j-amb Thermal Resistance Junction-ambient Max. 120 oC/W
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min. Max. Unit
VSSupply Voltage 3.6 18 V
VIH High-level Input Voltage at RESIN 2 V
VIL Low-level Input Voltage at RESIN 0.6 V
ViVoltage at Sense Input TL7702A
TL7705A 0
0See note 3
10 V
IOH High-level Output Current at RESET -16 mA
IOL Low-level Output Current at RESET 16 mA
Tamb Operating Free-air Temperature Range TL77-AI
TL77-AC -25
085
70 oC
Note : 3. Forproper operation of theTL7702A, thevoltage appliedtotheSENSEterminalshould not exceedVs- 1Vor6V,whicheverisless.
TL7700A Series
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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. Typ. Max. Unit
VOH High-level Output Voltage at RESET IOH = –16mA Vs-
1.5 V
VOL Low-Level Output Voltage at RESET IOL = 16mA 0.4 V
Vref Reference Voltage Tamb =25
o
C 2.48 2.53 2.58 V
VTThreshold Voltage at SENSE Input TL7702A
TL7705A Vs= 3.6V to 18V
Tamb =25
o
C2.48
4.5 2.53
4.55 2.58
4.6 V
VTThreshold Voltage at SENSE Inpu TL7702A
TL7705A Vs= 3.6V to 18V 2.45
4.45 2.53
4.55 2.58
4.6 V
VT+,V
T– Hysteresis (2) at SENSE Input TL7702A
TL7705A Vs= 3.6V to 18V
Tamb =25
o
C10
15 mV
IIInput Current at RESIN Input Vi= 2.4V to VS
Vi= 0.4V 20
-100 µA
IIInput Current at SENSE Input TL7702A Vref <V
i<V
s- 1.5V 0.5 2 µA
IOH High-level Output Current at RESET VO= 18V 50 µA
IOL Low-level Output Current at RESET VO=0V -50 µA
I
SSupply Current All Inputs and out.
open 1.8 3.3 mA
Notes: 1. All characteristics are measured withC = 0.1µF from Pin1 to GND, and withC = 0.1µF fromPin 3 to GND.
2. Hysteresis is thedifference betweenthepositive going input threshold voltage. VT+, and the negative going input threshold
voltage, VT-.
SWITCHING CHARACTERISTICS
Symbol Parameter Test Conditions Min. Typ. Max. Unit
tpi Pulse Width at SENSE Input Vih =V
ityp +0.04 x Vi
ViL =V
ityp –0.04 x Vi0.9 µs
tpi Pulse Width at RESIN Input 0.4 µs
tpo Pulse Width at Output CT= 0.1µF 0.65 1.3 2.6 ms
tpdHL Propagation Delay Time from RESIN
to RESET CL= 100pF, Vs= 5V, RL= 4.7kΩ1µs
tr/f Rise/Falltime at RESET and RESET CL= 10pF, Vs= 5V, RL= 4.7kΩ1µs
TL7700A Series
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TL7705
Figure 1 : ResetController forµP
TL7700A Series
4/7
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.75 0.069
a1 0.1 0.25 0.004 0.010
a2 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 0.6 0.024
S8°(max.)
(1) D and F do notinclude moldflash or protrusions. Mold flash or
potrusions shall not exceed 0.15mm (.006inch).
SO8
OUTLINE AND
MECHANICAL DATA
TL7700A Series
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Minidip
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 3.32 0.131
a1 0.51 0.020
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
D 10.92 0.430
E 7.95 9.75 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 3.18 3.81 0.125 0.150
Z 1.52 0.060
OUTLINE AND
MECHANICAL DATA
TL7700A Series
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license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this
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croelectronics products are not authorized for use as critical components in life support devices or systems without express written
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TL7700A Series
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