AVG Semiconductors DDi" CO Technical Data 13 DV74LS138 3 Line to 8 Line DV74ALS138 Decoder/Demultiplexer N Suffix These Schottky-clamped circuits are designed to be used in Plastic DIP high-performance memory-decoding or data-routing applications AVG-003 Case requiring very short propagation delay times. One of eight lines is decoded based upon the conditions at the three binary select inputs and the three enable inputs. Two active-low and one active-high enable inputs reduce the need for extemal gates or inverters when expanding. D Suffix Plastic SOP AVG's LS operates over extended Vcc from 4.5 to 5.5 V AVG-004 Case * AVG's LS and ALS both have guaranteed DC and AC specification over full temperature and Vcc range Switching specifications for ALS at 50 pF a AVG's ALS has the lowest speed power product (4pJ per gate typical) of all logic series Ag 1 iS Oy > PIN ASSIGNMENT i Ay 2 14 By AoL i 1%] veo Ag Is G, Afi 2 5 |) 0, i? Ao-Az Address 03 DATA Inputs Af] 3 4) 8 tl Hy OUTPUTS E1,E2 Enable Er . 10 9s (Active LOW) iL} 4 3 |] 0, Inputs Ee 2. Big E3 Enable (Active Fal) 5 2 | % 2. & _ _ HIGH) Input f 7 DoD; Active LOW e, 6 n)) o, ni 4 \ Outputs 9./j 7 01 9, ENABLE 5 PIN 16 ="CC GNO 1 - wwpuTs |] @ 5 PIN 8 = GND ye 8% 3s TRUTH TABLE L____Inputs _ Outputs - E: | Eo | Es | Ao Ar | Ao | Oo | G1 | G2 | Gs | Ga | Gs | Ge | G7 H| x |x /]x/|x{|x{|H}]HiH|H| HI] HH] HI H X | H| X | xX} x] x} Hi] Hi| HI] H!} HI] HI HI H _x}]xi}_e};x! x | xi xH!]Hi| oH! HH} H{|H{| HI H Lie t}|Hi ep etuetu!tsAHI|AH|H| HI HHH Lije}HiHteyet] H]e PH] aH} HEL H | Hi dH tiutulijet wate}; Hit H{etlaHiwH|Hi HH pL |} t}] HH} HH] HTL] HH} HLH] Lt] HY] aA] HI a en es ee es es L |]t}|H})H}]ti}H}!}H}|HI]H|H};}HI|L{IHIH tL | t | H|]t}| HH} Hi} HH} Hi Hi) HW} HI] aL da L t|H!|H|HIH|H H | H}| HI] AHI HI] HI L H = High Logic Level L = Low Logic Level X=Don't Care DV74L3138, DV74ALS138 3- 86 1-800-AVG-SEMIABSOLUTE MAXIMUM RATINGS Maximum ratings are those values beyond which damage to the device may occur. Symbol| Parameter isis. sd] AL S138 | Vee | Supply Voltage 7.0 7.0 Vin __| Input Voltage 7.0 7.0 Tste | Storage Temperature Range 65 to+150 -65to+150 GUARANTEED OPERATING CONDITIONS a ee Symbol Parameter LS$138 ALS138 Unit . Min _ Max Min Max | Vee | Supply Voltage 4.5 5.5 4.5 5.5 V | Vin | High Level Input Voltage 2.0 2.0 v | Vi__ | Low Level Input Voltage 0.8 - 08 | V | low | High Level Output Current 0.4 0.4 | mA lo. | Low Level Output Current 8.0 8.0 | mA) Ta __| Ambient Temperature Range -10 to +70 10 to + 70 "Cc | DC ELECTRICAL CHARACTERISTICS over full operating conditions Symbol Parameter Conditions LS138 ALS138 Unit | T| 1 Min | Typ Max] Min Typ Max Vix | Input Clamp Voltage Veco = min, lin = -18 mA -1.5 | -1.5 Von | High Level Output Vec=min, lox = max Vee-2| 3.5 Vec-2 Voltage a - Vor | Low Level Output Vec=min; lo. =4 mA 0.25 025' 04] V Voltage Vec=min; lo, =8 mA 0.35 0.35 | 05 : be High Level Input Voc=max, Vin= 2.7V 20 | uA Current - Voc=max, Vin= 7V 0.1 | mA lie Low Level Input Voc=max, Vin=0.4V 0.1 ] mA Current lo Short Circuit Current | Voc=max, Vo=2.25V =20 112 |] mA | cc | Supply Current Vec=Max 5 | 10 | mA, 1-800-AVG-SEMI 3-87 DV74L3138, DV74ALS138 Sel138 SWITCHING CHARACTERISTICS over full operating conditions LS138 ALS138 Symbol Parameter From To Unit Ci=15 pF VR =5002, . C.=50 pF Min | Max | Min | Max 7 teu | Propogation Delay Time, Address | 27 6 22 Low to High Level Output | = tea. | Propogation Delay Time Address | Y 39 6 | 18 High-to-Low Level Output - | tetH | Propogation Delay Time, Enable 26 4 17 Low to High Level Output | | tea | Propogation Delay Time Enable 38 5 7 High-to-Low Level Output __| - / SWITCHING WAVEFORMS \ 3V INPUTS + 1.3 x _ GND | !PHL ' OUTPUT 1.3V | VOL DV74LS138, DV74ALS138 3-88 1-800-AVG-SEMI