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MC74AC138, MC74ACT138 1-of-8 Decoder/Demultiplexer
T h e M C 7 4 A C 1 3 8 / 7 4 A C T 1 3 8 i s a h i g h-s p e e d 1 -o f -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.
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* * * * * w
Demultiplexing Capability Multiple Input Enable for Easy Expansion Active LOW Mutually Exclusive Outputs Outputs Source/Sink 24 mA ACT138 Has TTL Compatible Inputs
These devices are available in Pb-free package(s). Specifications herein apply to both standard and Pb-free devices. Please see our website at www.onsemi.com for specific Pb-free orderable part numbers, or contact your local ON Semiconductor sales office or representative.
VCC 16 O0 15 O1 14 O2 13 O3 12 O4 11 O5 10 O6 9
16 1
DIP-16 N SUFFIX CASE 648
16
1
SO-16 D SUFFIX CASE 751B
16
1
TSSOP-16 DT SUFFIX CASE 948F
16
1
EIAJ-16 M SUFFIX CASE 966
1 A0
2 A1
3 A2
4 E1
5 E2
6 E3
7 O7
8 GND
ORDERING INFORMATION
Device MC74AC138N MC74ACT138N MC74AC138D MC74ACT138D Package PDIP-16 PDIP-16 SOIC-16 SOIC-16 SOIC-16 SOIC-16 TSSOP-16 TSSOP-16 Shipping 25 Units/Rail 25 Units/Rail 48 Units/Rail 48 Units/Rail 2500 Tape & Reel 2500 Tape & Reel 96 Units/Rail 96 Units/Rail
Figure 1. Pinout: 16-Lead Packages Conductors (Top View)
A0 A1 A2
E1 E2 E3
MC74AC138DR2 MC74ACT138DR2
O0 O1 O2 O3 O4 O5 O6 O7
MC74AC138DT MC74ACT138DT MC74AC138DTR2
TSSOP-16 2500 Tape & Reel
Figure 2. Logic Symbol PIN ASSIGNMENT
PIN A0-A2 E1-E2 E3 O0-O7 FUNCTION Address Inputs Enable Inputs Enable Input Outputs
MC74ACT138DTR2 TSSOP-16 2500 Tape & Reel MC74AC138M MC74ACT138M MC74AC138MEL MC74ACT138MEL EIAJ-16 EIAJ-16 EIAJ-16 EIAJ-16 50 Units/Rail 50 Units/Rail 2000 Tape & Reel 2000 Tape & Reel
DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 6 of this data sheet.
(c) Semiconductor Components Industries, LLC, 2006
March, 2006 - Rev. 6
1
Publication Order Number: MC74AC138/D
MC74AC138, MC74ACT138
FUNCTIONAL DESCRIPTION The MC74AC138/74ACT138 high-speed 1-of-8 decoder/demultiplexer accepts three binary weighted inputs (A0, A1, 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 4). 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 E1 H X X L L L L L L L L E2 X H X L L L L L L L L E3 X X L H H H H H H H H A0 X X X L H L H L H L H A1 X X X L L H H L L H H A2 X X X L L L L H H H H O0 H H H L H H H H H H H O1 H H H H L H H H H H H O2 H H H H H L H H H H H Outputs O3 H H H H H H L H H H H O4 H H H H H H H L H H H O5 H H H H H H H H L H H O6 H H H H H H H H H L H O7 H H H H H H H H H H L
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial
A2
A1
A0
E1 E2 E3
07 NOTE:
06
05
04
03
02
01
00
This diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Figure 3. Logic Diagram
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MC74AC138, MC74ACT138
A0 A1 A2 04 A3 A4 H 123 A0 A1 A2 E A0 A1 A2 123 E A0 A1 A2 123 E A0 A1 A2 123 E
00 01 02 03 04 05 06 07 00
00 01 02 03 04 05 06 07
00 01 02 03 04 05 06 07
00 01 02 03 04 05 06 07 031
Figure 4. Expansion to 1-of-32 Decoding
MAXIMUM RATINGS*
Symbol VCC VIN VOUT IIN IOUT ICC Tstg Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Sink/Source Current, per Pin DC VCC or GND Current per Output Pin Storage Temperature Value -0.5 to +7.0 -0.5 to VCC +0.5 -0.5 to VCC +0.5 20 50 50 -65 to +150 Unit V V V mA mA mA 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 VCC VIN, VOUT tr, tf Supply Voltage DC Input Voltage, Output Voltage (Ref. to GND) Input Rise and Fall Time (Note 1) AC Devices except Schmitt Inputs Input Rise and Fall Time (Note 2) ACT Devices except Schmitt Inputs Junction Temperature (PDIP) Operating Ambient Temperature Range Output Current - High Output Current - Low VCC @ 3.0 V VCC @ 4.5 V VCC @ 5.5 V VCC @ 4.5 V VCC @ 5.5 V Parameter AC ACT Min 2.0 4.5 0 - - - - - - -40 - - Typ 5.0 5.0 - 150 40 25 10 8.0 - 25 - - Max 6.0 5.5 VCC - - - - - 140 85 -24 24 ns/V C C mA mA ns/V Unit V V
tr, tf TJ TA IOH IOL
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.
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MC74AC138, MC74ACT138
DC CHARACTERISTICS
74AC Symbol Parameter VCC (V) TA = +25C Typ VIH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 VOL Maximum Low Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 IIN IOLD IOHD ICC Maximum Input Leakage Current Minimum Dynamic Output Current Maximum Quiescent Supply Current 5.5 5.5 5.5 5.5 1.5 2.25 2.75 1.5 2.25 2.75 2.99 4.49 5.49 - - - 0.002 0.001 0.001 - - - - - - - 74AC TA = -40C to +85C Unit Conditions
Guaranteed Limits 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 2.56 3.86 4.86 0.1 0.1 0.1 0.36 0.36 0.36 0.1 - - 8.0 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 2.46 3.76 4.76 0.1 0.1 0.1 0.44 0.44 0.44 1.0 75 -75 80 V VOUT = 0.1 V or VCC - 0.1 V VOUT = 0.1 V or VCC - 0.1 V IOUT = -50 A
VIL
V
VOH
V
V
*VIN = VIL or VIH -12 mA IOH -24 mA -24 mA IOUT = 50 A
V
V
*VIN = VIL or VIH 12 mA IOL 24 mA 24 mA VI = VCC, GND VOLD = 1.65 V Max VOHD = 3.85 V Min VIN = VCC or GND
A mA mA A
*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.
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MC74AC138, MC74ACT138
AC CHARACTERISTICS (For Figures and Waveforms - See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74AC Symbol Parameter VCC* (V) Min tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay An to On Propagation Delay An to On Propagation Delay E1 or E2 to On Propagation Delay E1 or E2 to On Propagation Delay E3 to On Propagation Delay E3 to On 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 TA = +25C CL = 50 pF Typ 8.5 6.5 8.0 6.0 11.0 8.0 9.5 7.0 11.0 8.0 8.5 6.0 Max 13.0 9.5 12.5 9.0 15.0 11.0 13.5 9.5 15.5 11.0 13.0 8.0 74AC TA = -40C to +85C CL = 50 pF Min 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.0 Max 15.0 10.5 14.0 10.5 16.0 12.0 15.0 10.5 16.5 12.5 14.0 9.5 ns ns ns ns ns ns 3-6 3-6 3-6 3-6 3-6 3-6 Unit Fig. No.
*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
74ACT Symbol Parameter VCC (V) TA = +25C Typ VIH VIL VOH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 4.5 5.5 IIN ICCT IOLD IOHD ICC Maximum Input Leakage Current Additional Max. ICC/Input Minimum Dynamic Output Current Maximum Quiescent Supply Current 5.5 5.5 5.5 5.5 5.5 1.5 1.5 1.5 1.5 4.49 5.49 - - 0.001 0.001 - - - 0.6 - - - 74ACT TA = -40C to +85C Unit Conditions
Guaranteed Limits 2.0 2.0 0.8 0.8 4.4 5.4 3.86 4.86 0.1 0.1 0.36 0.36 0.1 - - - 8.0 2.0 2.0 0.8 0.8 4.4 5.4 3.76 4.76 0.1 0.1 0.44 0.44 1.0 1.5 75 -75 80 V V V VOUT = 0.1 V or VCC - 0.1 V VOUT = 0.1 V or VCC - 0.1 V IOUT = -50 A *VIN = VIL or VIH -24 mA IOH -24 mA IOUT = 50 A *VIN = VIL or VIH 24 mA IOL 24 mA VI = VCC, GND VI = VCC - 2.1 V VOLD = 1.65 V Max VOHD = 3.85 V Min VIN = VCC or GND
V
V
V
A mA mA mA A
*All outputs loaded; thresholds on input associated with output under test. Maximum test duration 2.0 ms, one output loaded at a time.
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MC74AC138, MC74ACT138
AC CHARACTERISTICS (For Figures and Waveforms - See Section 3 of the ON Semiconductor FACT Data Book, DL138/D)
74ACT Symbol Parameter VCC* (V) Min tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay An to On Propagation Delay An to On Propagation Delay E1 or E2 to On Propagation Delay E1 or E2 to On Propagation Delay E3 to On Propagation Delay E3 to On 5.0 5.0 5.0 5.0 5.0 5.0 1.5 1.5 2.5 2.0 2.5 2.0 TA = +25C CL = 50 pF Typ 7.0 6.5 8.0 7.5 8.0 6.5 Max 10.5 10.5 11.5 11.5 12.0 10.5 74ACT TA = -40C to +85C CL = 50 pF Min 1.5 1.5 2.0 2.0 2.0 1.5 Max 11.5 11.5 12.5 12.5 13.0 11.5 ns ns ns ns ns ns 3-6 3-6 3-6 3-6 3-6 3-6 Unit Fig. No.
*Voltage Range 5.0 V is 5.0 V 0.5 V
CAPACITANCE
Symbol CIN CPD Input Capacitance Power Dissipation Capacitance Parameter Value Typ 4.5 60 Unit pF pF Test Conditions VCC = 5.0 V VCC = 5.0 V
MARKING DIAGRAMS
DIP-16 MC74AC138N AWLYYWW SO-16 AC138 AWLYWW TSSOP-16 EIAJ-16 74AC138 ALYW
AC 138 ALYW
MC74ACT138N AWLYYWW
ACT138 AWLYWW
ACT 138 ALYW
74ACT138 ALYW
A WL, L YY, Y WW, W
= Assembly Location = Wafer Lot = Year = Work Week
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MC74AC138, MC74ACT138
PACKAGE DIMENSIONS
PDIP-16 N SUFFIX 16 PIN PLASTIC DIP PACKAGE CASE 648-08 ISSUE R
9
-A-
16
B
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. DIM A B C D F G H J K L M S 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 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
F S
C
L
-T- H K G D
16 PL
SEATING PLANE
J TA
M
M
0.25 (0.010)
M
SO-16 D SUFFIX 16 PIN PLASTIC SOIC PACKAGE CASE 751B-05 ISSUE J
-A-
16 9 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. 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
-B-
1 8
P
8 PL
0.25 (0.010)
M
B
S
G F
K C -T-
SEATING PLANE
R
X 45 _
M D
16 PL M
J
0.25 (0.010)
TB
S
A
S
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MC74AC138, MC74ACT138
PACKAGE DIMENSIONS
TSSOP-16 DT SUFFIX 16 PIN PLASTIC TSSOP PACKAGE CASE948F-01 ISSUE O
16X K REF
0.10 (0.004) 0.15 (0.006) T U
S
M
TU
S
V
S
K K1
16 9
2X
L/2
J1 B -U-
L
PIN 1 IDENT. 1 8
SECTION N-N J
N 0.15 (0.006) T U
S
0.25 (0.010) M
A -V- N F DETAIL E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH. PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE K DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE -W-. DIM A B C D F G H J J1 K K1 L M MILLIMETERS MIN MAX 4.90 5.10 4.30 4.50 --- 1.20 0.05 0.15 0.50 0.75 0.65 BSC 0.18 0.28 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 BSC 0_ 8_ INCHES MIN MAX 0.193 0.200 0.169 0.177 --- 0.047 0.002 0.006 0.020 0.030 0.026 BSC 0.007 0.011 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252 BSC 0_ 8_
C 0.10 (0.004) -T- SEATING
PLANE
D
G
H
DETAIL E
EIAJ-16 M SUFFIX 16 PIN PLASTIC EIAJ PACKAGE CASE966-01 ISSUE O
16 9
LE Q1 E HE M_ L DETAIL P
1
8
Z
D A VIEW P c
e
b 0.13 (0.005)
M
A1 0.10 (0.004)
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EEE CCC EEE CCC
-W-
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS AND ARE MEASURED AT THE PARTING LINE. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 5. THE LEAD WIDTH DIMENSION (b) DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE LEAD WIDTH DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINIMUM SPACE BETWEEN PROTRUSIONS AND ADJACENT LEAD TO BE 0.46 ( 0.018). DIM A A1 b c D E e HE L LE M Q1 Z MILLIMETERS MIN MAX --- 2.05 0.05 0.20 0.35 0.50 0.18 0.27 9.90 10.50 5.10 5.45 1.27 BSC 7.40 8.20 0.50 0.85 1.10 1.50 10 _ 0_ 0.70 0.90 --- 0.78 INCHES MIN MAX --- 0.081 0.002 0.008 0.014 0.020 0.007 0.011 0.390 0.413 0.201 0.215 0.050 BSC 0.291 0.323 0.020 0.033 0.043 0.059 10 _ 0_ 0.028 0.035 --- 0.031
MC74AC138, MC74ACT138
Notes
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MC74AC138, MC74ACT138
Notes
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MC74AC138, MC74ACT138
Notes
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MC74AC138/D

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