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MC74AC257, MC74ACT257 Quad 2-Input Multiplexer with 3-State Outputs
The MC74AC257/74ACT257 is a quad 2-input multiplexer with 3-state outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.
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Multiplexer Expansion by Tying Outputs Together Noninverting 3-State Outputs Outputs Source/Sink 24 mA ACT257 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 OE 15 I0c 14 I1c 13 Zc 12 I0d 11 I1d 10 Zd 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 S 2 I0a 3 I1a 4 Za 5 I0b 6 I1b 7 Zb 8 GND
1
EIAJ-16 M SUFFIX CASE 966
Figure 1. Pinout: 16-Lead Packages Conductors (Top View)
ORDERING INFORMATION
Device MC74AC257N MC74ACT257N MC74AC257D MC74ACT257D MC74AC257DR2 MC74ACT257DR2 MC74AC257DT MC74ACT257DT MC74AC257DTR2 MC74ACT257M MC74AC257MEL MC74ACT257MEL 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
TSSOP-16 2500 Tape & Reel EIAJ-16 EIAJ-16 EIAJ-16 50 Units/Rail 2000 Tape & Reel 2000 Tape & Reel
MC74ACT257DTR2 TSSOP-16 2500 Tape & Reel
DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 8 of this data sheet.
(c) Semiconductor Components Industries, LLC, 2006
March, 2006 - Rev. 7
1
Publication Order Number: MC74AC257/D
MC74AC257, MC74ACT257
PIN NAME
PIN S OE I0a-I0d I1a-I1d Za-Zd FUNCTION Common Data Select Input 3-State Output Enable Input Data Inputs from Source 0 Data Inputs from Source 1 3-State Multiplexer Outputs
TRUTH TABLE
Output Enable OE H L L L L
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
Select Input S X H H L L
Data Inputs I0 X X X L H I1 X L H X X
Outputs Z Z L H L H
OE I0a I1a I0b I1b I0c I1c I0d I1d S Za Zb Zc Zd
Figure 2. Logic Symbol
FUNCTIONAL DESCRIPTION The MC74AC257/74ACT257 is a quad 2-input multiplexer with 3-state outputs. It selects four bits of data from two sources under control of a Common Data Select input. When the Select input is LOW, the I0x inputs are selected and when Select is HIGH, the I1x inputs are selected. The data on the selected inputs appears at the outputs in true (noninverted) form. The device is the logic
implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input. The logic equations for the outputs are shown below: Za = OE*(I1a*S+I0a*S) Zb = OE*(I1b*S+I0b*S) Zc = OE*(I1c*S+I0c*S) Zd = OE*(I1d*S+I0d*S) When the Output Enable input (OE) is HIGH, the outputs are forced to a high impedance state. If the outputs are tied together, all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings. Designers should ensure the Output Enable signals to 3-state devices whose outputs are tied together are designed so there is no overlap.
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MC74AC257, MC74ACT257
OE I0a I1a I0b I1b I0c I1c I0d I1d S
Za NOTE:
Zb
Zc
Zd
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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MC74AC257, MC74ACT257
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. 1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times. 2. 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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MC74AC257, MC74ACT257
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 IOZ Maximum Input Leakage Current Maximum 3-State Current Minimum Dynamic Output Current Maximum Quiescent Supply Current 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 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 V VOUT = 0.1 V or VCC - 0.1 V VOUT = 0.1 V or VCC - 0.1 V IOUT = -50 mA
VIL
V
VOH
V
V
*VIN = VIL or VIH -12 mA IOH -24 mA -24 mA IOUT = 50 mA
V
V
*VIN = VIL or VIH 12 mA IOL 24 mA 24 mA VI = VCC, GND VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND VOLD = 1.65 V Max VOHD = 3.85 V Min VIN = VCC or GND
mA
5.5 5.5 5.5 5.5
- - - -
0.5 - - 8.0
5.0 75 -75 80
mA mA mA mA
IOLD IOHD ICC
*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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MC74AC257, MC74ACT257
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 tPZH tPZL tPHZ tPLZ Propagation Delay In to Zn Propagation Delay In to Zn Propagation Delay S to Zn Propagation Delay S to Zn Output Enable Time Output Enable Time Output Disable Time Output Disable Time 3.3 5.0 3.3 5.0 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 1.5 1.5 1.5 1.5 TA = +25C CL = 50 pF Typ 5.0 4.0 6.0 4.5 7.0 5.0 7.5 5.5 6.5 5.0 5.5 5.0 5.5 5.0 5.5 5.0 Max 8.5 6.0 8.5 6.0 10.5 7.5 10.5 7.5 9.5 7.5 9.0 8.5 10.0 9.0 9.0 8.0 74AC TA = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 1.5 1.0 1.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 9.0 7.0 9.0 7.0 11.5 8.5 11.5 8.5 10.5 8.5 10.0 9.5 11.0 10.0 10.0 9.0 ns ns ns ns ns ns ns ns 3-5 3-5 3-6 3-6 3-7 3-8 3-7 3-8 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.
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MC74AC257, MC74ACT257
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 DICCT IOZ Maximum Input Leakage Current Additional Max. ICC/Input Maximum 3-State Current Minimum Dynamic Output Current Maximum Quiescent Supply Current 5.5 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 - 0.5 - - 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 5.0 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 mA *VIN = VIL or VIH -24 mA IOH -24 mA IOUT = 50 mA *VIN = VIL or VIH 24 mA IOL 24 mA VI = VCC, GND VI = VCC - 2.1 V VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND VOLD = 1.65 V Max VOHD = 3.85 V Min VIN = VCC or GND
V
V
V
mA mA mA mA mA mA
IOLD IOHD ICC
*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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MC74AC257, MC74ACT257
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 tPZH tPZL tPHZ tPLZ Propagation Delay In to Zn Propagation Delay In to Zn Propagation Delay S to Zn Propagation Delay S to Zn Output Enable Time Output Enable Time Output Disable Time Output Disable Time 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 1.5 2.0 2.0 2.5 2.0 2.0 2.5 2.0 TA = +25C CL = 50 pF Typ 5.0 6.0 7.0 7.0 6.0 6.0 6.5 6.0 Max 7.0 7.5 9.5 10.5 8.0 8.0 9.0 7.5 74ACT TA = -40C to +85C CL = 50 pF Min 1.0 1.5 1.5 2.0 1.5 1.5 1.5 1.5 Max 7.5 8.5 10.5 11.5 9.0 9.0 10.0 8.5 ns ns ns ns ns ns ns ns 3-6 3-6 3-6 3-6 3-7 3-8 3-7 3-8 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 50 Unit pF pF Test Conditions VCC = 5.0 V VCC = 5.0 V
MARKING DIAGRAMS
DIP-16 MC74AC257N AWLYYWW SO-16 AC257 AWLYWW TSSOP-16 EIAJ-16 74AC257 ALYW
AC 257 ALYW
MC74ACT257N AWLYYWW
ACT257 AWLYWW
ACT 257 ALYW
74ACT257 ALYW
A WL, L YY, Y WW, W
= Assembly Location = Wafer Lot = Year = Work Week
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MC74AC257, MC74ACT257
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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MC74AC257, MC74ACT257
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
MC74AC257, MC74ACT257
Notes
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MC74AC257, MC74ACT257
Notes
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MC74AC257/D

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