MC74ACT138D

          The MC74AC138/74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for high-speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three MC74AC138/74ACT138 devices or a 1-of-32 decoder using four MC74AC138/ 74ACT138 devices and one inverter. • • • • • 1-OF-8 DECODER/ DEMULTIPLEXER Demultiplexing Capability Multiple Input Enable for Easy Expansion Active LOW Mutually Exclusive Outputs Outputs Source/Sink 24 mA ′ACT138 Has TTL Compatible Inputs VCC O0 O1 O2 O3 O4 O5 O6 16 15 14 13 12 11 10 9 N SUFFIX CASE 648-08 PLASTIC PIN NAMES 1 A0 2 A1 3 A2 4 E1 5 E2 6 E3 7 O7 8 GND A0–A2 E1–E2 E3 O0–O7 Address Inputs Enable Inputs Enable Input Outputs D SUFFIX CASE 751B-05 PLASTIC LOGIC SYMBOL A0 A1 A2 E1 E2 E3 O0 O1 O2 O3 O4 O5 O6 O7 FACT DATA 5-1 MC74AC138 MC74ACT138 FUNCTIONAL DESCRIPTION The MC74AC138/74ACT138 high-speed 1-of-8 decoder/ demultiplexer accepts three binary weighted inputs (A0, A 1, A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (O0–O7). The MC74AC138/74ACT138 features three Enable inputs, two active-LOW (E1, E2) and one active-HIGH (E3). All outputs will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enabled function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four MC74AC138/ 74ACT138 devices and one inverter (See Figure a). The MC74AC138/74ACT138 can be used as an 8-output demultiplexer by using one of the active LOW Enable inputs as the data input and the other Enable inputs as strobes. The Enable inputs which are not used must be permanently tied to their appropriate active-HIGH or active-LOW state. TRUTH TABLE Inputs Outputs E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7 H X X X H X X X L X X X X X X X X X H H H H H H H H H H H H H H H H H H H H H H H H L L L L L L L L H H H H L H L H L L H H L L L L L H H H H L H H H H L H H H H L H H H H H H H H H H H H H H H H L L L L L L L L H H H H L H L H L L H H H H H H H H H H H H H H H H H H H H H H L H H H H L H H H H L H H H H L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial LOGIC DIAGRAM A2 07 A1 E1 E2 E3 A0 06 05 04 03 02 01 00 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. FACT DATA 5-2 MC74AC138 MC74ACT138 A0 A1 A2 ′04 A3 A4 H 123 A0 A1 A2 123 E A0 A1 A2 123 E A0 A1 A2 00 01 02 03 04 05 06 07 00 01 02 03 04 05 06 07 123 E 00 01 02 03 04 05 06 07 A0 A1 A2 E 00 01 02 03 04 05 06 07 031 00 Figure a: Expansion to 1-of-32 Decoding MAXIMUM RATINGS* Symbol Parameter Value Unit –0.5 to +7.0 V V VCC DC Supply Voltage (Referenced to GND) Vin DC Input Voltage (Referenced to GND) –0.5 to VCC +0.5 Vout DC Output Voltage (Referenced to GND) –0.5 to VCC +0.5 V Iin DC Input Current, per Pin ±20 mA Iout DC Output Sink/Source Current, per Pin ±50 mA ICC DC VCC or GND Current per Output Pin ±50 mA Tstg Storage Temperature –65 to +150 °C * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC Supply Voltage Vin, Vout DC Input Voltage, Output Voltage (Ref. to GND) tr, tf Input Rise and Fall Time (Note 1) ′AC Devices except Schmitt Inputs tr, tf Input Rise and Fall Time (Note 2) ′ACT Devices except Schmitt Inputs TJ Junction Temperature (PDIP) TA Operating Ambient Temperature Range IOH IOL Min Typ Max ′AC 2.0 5.0 6.0 ′ACT 4.5 5.0 5.5 0 VCC VCC @ 3.0 V 150 VCC @ 4.5 V 40 VCC @ 5.5 V 25 VCC @ 4.5 V 10 VCC @ 5.5 V 8.0 Unit V V ns/V ns/V 140 °C 85 °C Output Current — High –24 mA Output Current — Low 24 mA –40 1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times. 2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times. FACT DATA 5-3 25 MC74AC138 MC74ACT138 DC CHARACTERISTICS Symbol Parameter VCC (V) 74AC 74AC TA = +25°C TA = –40°C to +85°C Typ VIH VIL VOH 1.5 2.25 2.75 2.1 3.15 3.85 2.1 3.15 3.85 V VOUT = 0.1 V or VCC – 0.1 V Maximum Low Level Input Voltage 3.0 4.5 5.5 1.5 2.25 2.75 0.9 1.35 1.65 0.9 1.35 1.65 V VOUT = 0.1 V or VCC – 0.1 V Minimum High Level Output Voltage 3.0 4.5 5.5 2.99 4.49 5.49 2.9 4.4 5.4 2.9 4.4 5.4 V 2.56 3.86 4.86 2.46 3.76 4.76 0.1 0.1 0.1 0.1 0.1 0.1 3.0 4.5 5.5 0.36 0.36 0.36 0.44 0.44 0.44 5.5 ±0.1 Maximum Low Level Output Voltage Maximum Input Leakage Current IOLD †Minimum Dynamic Output Current ICC Guaranteed Limits 3.0 4.5 5.5 IIN IOHD Conditions Minimum High Level Input Voltage 3.0 4.5 5.5 VOL Unit Maximum Quiescent Supply Current 3.0 4.5 5.5 0.002 0.001 0.001 IOUT = –50 µA V *VIN = VIL or VIH –12 mA IOH –24 mA –24 mA IOUT = 50 µA V V *VIN = VIL or VIH 12 mA IOL 24 mA 24 mA ±1.0 µA VI = VCC, GND 5.5 75 mA VOLD = 1.65 V Max 5.5 –75 mA VOHD = 3.85 V Min 80 µA VIN = VCC or GND 5.5 8.0 * All outputs loaded; thresholds on input associated with output under test. † Maximum test duration 2.0 ms, one output loaded at a time. Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC. FACT DATA 5-4 MC74AC138 MC74ACT138 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol VCC* (V) Parameter 74AC 74AC TA = +25°C CL = 50 pF TA = –40°C to +85°C CL = 50 pF Min Typ Max Min Max Unit Fig. No. tPLH Propagation Delay An to On 3.3 5.0 1.5 1.5 8.5 6.5 13.0 9.5 1.5 1.5 15.0 10.5 ns 3-6 tPHL Propagation Delay An to On 3.3 5.0 1.5 1.5 8.0 6.0 12.5 9.0 1.5 1.5 14.0 10.5 ns 3-6 tPLH Propagation Delay E1 or E2 to On 3.3 5.0 1.5 1.5 11.0 8.0 15.0 11.0 1.5 1.5 16.0 12.0 ns 3-6 tPHL Propagation Delay E1 or E2 to On 3.3 5.0 1.5 1.5 9.5 7.0 13.5 9.5 1.5 1.5 15.0 10.5 ns 3-6 tPLH Propagation Delay E3 to On 3.3 5.0 1.5 1.5 11.0 8.0 15.5 11.0 1.5 1.5 16.5 12.5 ns 3-6 tPHL Propagation Delay E3 to On 3.3 5.0 1.5 1.5 8.5 6.0 13.0 8.0 1.5 1.0 14.0 9.5 ns 3-6 * Voltage Range 3.3 V is 3.3 V ±0.3 V. Voltage Range 5.0 V is 5.0 V ±0.5 V. DC CHARACTERISTICS Symbol Parameter VCC (V) 74ACT 74ACT TA = +25°C TA = –40°C to +85°C Typ Guaranteed Limits Unit Conditions VIH Minimum High Level Input Voltage 4.5 5.5 1.5 1.5 2.0 2.0 2.0 2.0 V VOUT = 0.1 V or VCC – 0.1 V VIL Maximum Low Level Input Voltage 4.5 5.5 1.5 1.5 0.8 0.8 0.8 0.8 V VOUT = 0.1 V or VCC – 0.1 V VOH Minimum High Level Output Voltage 4.5 5.5 4.49 5.49 4.4 5.4 4.4 5.4 V 3.86 4.86 3.76 4.76 0.1 0.1 0.1 0.1 4.5 5.5 0.36 0.36 0.44 0.44 V *VIN = VIL or VIH 24 mA IOL 24 mA ±0.1 ±1.0 µA VI = VCC, GND 1.5 mA VI = VCC – 2.1 V 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 0.001 0.001 V V IOUT = –50 µA *VIN = VIL or VIH –24 mA IOH –24 mA IOUT = 50 µA IIN Maximum Input Leakage Current 5.5 ∆ICCT Additional Max. ICC/Input 5.5 IOLD †Minimum Dynamic Output Current 5.5 75 mA VOLD = 1.65 V Max 5.5 –75 mA VOHD = 3.85 V Min 80 µA VIN = VCC or GND IOHD ICC Maximum Quiescent Supply Current 0.6 5.5 8.0 * All outputs loaded; thresholds on input associated with output under test. † Maximum test duration 2.0 ms, one output loaded at a time. FACT DATA 5-5 MC74AC138 MC74ACT138 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Parameter VCC* (V) 74ACT 74ACT TA = +25°C CL = 50 pF TA = –40°C to +85°C CL = 50 pF Min Typ Max Min Max Unit Fig. No. tPLH Propagation Delay An to On 5.0 1.5 7.0 10.5 1.5 11.5 ns 3-6 tPHL Propagation Delay An to On 5.0 1.5 6.5 10.5 1.5 11.5 ns 3-6 tPLH Propagation Delay E1 or E2 to On 5.0 2.5 8.0 11.5 2.0 12.5 ns 3-6 tPHL Propagation Delay E1 or E2 to On 5.0 2.0 7.5 11.5 2.0 12.5 ns 3-6 tPLH Propagation Delay E3 to On 5.0 2.5 8.0 12.0 2.0 13.0 ns 3-6 tPHL Propagation Delay E3 to On 5.0 2.0 6.5 10.5 1.5 11.5 ns 3-6 Voltage Range 5.0 V is 5.0 V ± 0.5 V CAPACITANCE Symbol Parameter Value Typ Unit Test Conditions CIN Input Capacitance 4.5 pF VCC = 5.0 V CPD Power Dissipation Capacitance 60 pF VCC = 5.0 V FACT DATA 5-6 MC74AC138 MC74ACT138 OUTLINE DIMENSIONS N SUFFIX PLASTIC DIP PACKAGE CASE 648–08 ISSUE R –A– 16 9 1 8 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. B F C DIM A B C D F G H J K L M S L S SEATING PLANE –T– K H G D M J 16 PL 0.25 (0.010) T A M M D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J –A– 16 1 P 8 PL 0.25 (0.010) 8 M B S G R K F X 45 _ C –T– SEATING PLANE J M D 16 PL 0.25 (0.010) M T B S A S MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 9 –B– INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 DIM A B C D F G J K M P R MILLIMETERS MIN MAX 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019 Motorola reserves the right to make changes without further notice to any products herein. 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Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315 MFAX: RMFAX0@email.sps.mot.com –TOUCHTONE (602) 244–6609 INTERNET: http://Design–NET.com HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 ◊ FACT DATA 5-7 *MC74AC138/D* MC74AC138/D