MANEJO DE LATCH SR
CON COMPUERTAS NOR
MARCO ANTONIO CASTRO
JOSÉ ALEJANDRO DE LA CRUZ
JORGE OÑATE
UNIVERSIDAD AUTÓNOMA DE OCCIDENTE
UAOTEC
TECNOLOGÍA EN SISTEMAS ELECTRONICOS Y AUTOMATIZACIÓN
CALI
2018
MANEJO DE LATCH SR
CON COMPUERTAS NOR
MARCO ANTONIO CASTRO
JOSÉ ALEJANDRO DE LA CRUZ
JORGE OÑATE
INFORME DE LABORATORIO
Profesor
FREDDY ENRIQUE JARAMILLO TABARES
UNIVERSIDAD AUTÓNOMA DE OCCIDENTE
UAOTEC
TECNOLOGÍA EN SISTEMAS ELECTRONICOS Y AUTOMATIZACIÓN
CALI
2018
3
Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
DM74LS02
Supply Voltage 7V the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Input Voltage 7V
Characteristics tables are not guaranteed at the absolute maximum ratings.
Operating Free Air Temperature Range 0 C to 70 C The “Recommended Operating Conditions” table will define the conditions for actual
device operation.
Storage Temperature Range 65 C to 150 C
Recommended Operating Conditions
Symbol Parameter Min Nom Max Units VCC
Supply Voltage 4.75 5 5.25 V VIH HIGH Level
Input Voltage 2 V
VIL LOW Level Input Voltage Typ0.8 V IOH
HIGH Level Output Current
Symbol Parameter Conditions 0.4 Min mA IOL
(Note 2) Max LOW
Units
VI Input Clamp Voltage VCC Min, II 18 mA 1.5 V
Level Output Current 8 mA TA Free Air
VOH HIGH Level VCC Min, IOH Max,
Operating Temperature 0 70 C
VIL Max
Output Voltage 2.7 3.4 V
VOL LOW Level VCC Min, IOL Max,
Electrical Characteristics VIH Min
Output Voltage 0.35 0.5
IOL 4 mA, VCC Min 0.25 0.4 V
over recommended operating free air temperature range (unless otherwise noted)
II Input Current @ Max Input Voltage VCC Max, VI 7V 0.1 mA
IIH HIGH Level Input Current VCC Max, VI 2.7V 20 A
IIL LOW Level Input Current VCC Max, VI 0.4V 0.40 mA
IOS Short Circuit Output Current VCC Max (Note 3) 20 100 mA
ICCH Supply Current with Outputs HIGH VCC Max 1.6 3.2 mA
ICCL Supply Current with Outputs LOW VCC Max 2.8 5.4 mA
Note 2: All typicals are at VCC 5V, T A 25 C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Switching Characteristics
at VCC 5V and TA 25 C
RL 2k
Symbol Parameter CL 15 pF CL 50 pF Units
Min Max Min Max
tPLH Propagation Delay Time
13 18 ns
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
10 15 ns
HIGH-to-LOW Level Output
www.fairchildsemi.com 2
4
Physical Dimensions inches (millimeters) unless otherwise noted
DM74LS02
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Package Number M14A
5
DM74LS02
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M14D
6
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
DM74LS02 Quad 2-Input NOR Gate
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N14A
7
CIRCUITO LATCH SR = COMPUERTA NOR
ESQUEMÁTICO
8
CIRCUITO LATCH SR = COMPUERTA NOR
MONTAJE EN PROTOBOARD
Se realiza el montaje de los dos circuitos solicitados por el docente, en los
cuales el primer montaje, que es el ubicado a la izquierda de la protoboard,
sirvió de complemento para la ejecución del segundo, ya que al “mandar” un
uno el sistema funciona conmutando las salidas con los pulsadores y cuando
el circuito “manda” un cero los pulsadores no conmutan.
En la segunda opción de circuito se usan integrados con compuertas NOT y
compuertas OR, junto a los LEDS para verificar el comportamiento del
circuito
