QUAD 2-INPUT MULTIPLEXER The MC74AC157/74ACT157 is a high-speed quad 2-input multiplexer. Four bits of data from two sources can be selected using the common Select and Enable inputs. The four outputs present the selected data in the true (noninverted) form. The MC74AC157/74ACT157 can also be used as a function generator. • Outputs Source/Sink 24 mA • ′ACT157 Has TTL Compatible Inputs VCC 16 E 15 I0c 14 I1c 13 Zc I0d 11 12 I1d 10 Zd N SUFFIX CASE 648-08 PLASTIC 9 PIN NAMES 1 2 3 4 5 6 7 8 S I0a I1a Za I0b I1b Zb GND I0a–I0d I1a–I1d E S Za–Zd Source 0 Data Inputs Source 1 Data Inputs Enable Input Select Input Outputs D SUFFIX CASE 751B-05 PLASTIC TRUTH TABLE LOGIC SYMBOL Inputs Outputs E S I0 I1 Z H L L L L X H H L L X X X L H X L H X X L L H L H E I0a I1a I0b I1b I0c I1c I0d I1d S Za H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial FACT DATA 5-1 Zb Zc Zd MC74AC157 MC74ACT157 FUNCTIONAL DESCRIPTION The MC74AC157/74ACT157 is a quad 2-input multiplexer. It selects four bits of data from two sources under the control of a common Select input (S). The Enable input (E) is active-LOW. When E is HIGH, all of the outputs (Z) are forced LOW regardless of all other inputs. The MC74AC157/ 74ACT157 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: A common use of the MC74AC157/74ACT157 is the moving of data from two groups of registers to four common output busses. The particular register from which the data comes is determined by the state of the Select input. A less obvious use is as a function generator. The MC74AC157/ 74ACT157 can generate any four of the sixteen different functions of two variables with one variable common. This is useful for implementing gating functions. Za = E•(I1a•S+I0a•S) Zb = E•(I1b•S+I0b•S) Zc = E•(I1c•S+I0c•S) Zd = E•(I1d•S+I0d•S) LOGIC DIAGRAM I0a I1a I0b Za I1b I0c Zb I1c Zc I0d I1d E S Zd Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 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. FACT DATA 5-2 MC74AC157 MC74ACT157 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 2) ′ACT Devices except Schmitt Inputs TJ Junction Temperature (PDIP) TA Operating Ambient Temperature Range IOH IOL Typ Max ′AC 2.0 5.0 6.0 ′ACT 4.5 5.0 5.5 0 Input Rise and Fall Time (Note 1) ′AC Devices except Schmitt Inputs tr, tf Min Unit V 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 V ns/V ns/V 140 °C 85 °C Output Current — High –24 mA Output Current — Low 24 mA –40 25 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. 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 5-3 MC74AC157 MC74ACT157 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 S to Zn 3.3 5.0 1.5 1.5 7.0 5.5 11.5 9.0 1.5 1.5 13.0 10.0 ns 3-6 tPHL Propagation Delay S to Zn 3.3 5.0 1.5 1.5 6.5 5.0 11.0 8.5 1.5 1.0 12.0 9.5 ns 3-6 tPLH Propagation Delay E to Zn 3.3 5.0 1.5 1.5 7.0 5.5 11.5 9.0 1.5 1.5 13.0 10.0 ns 3-6 tPHL Propagation Delay En to Zn 3.3 5.0 1.5 1.5 6.5 5.5 11.0 9.0 1.5 1.0 12 9.5 ns 3-6 tPLH Propagation Delay In to Zn 3.3 5.0 1.5 1.5 5.0 4.0 8.5 6.5 1.0 1.0 9.0 7.0 ns 3-5 tPHL Propagation Delay In to Zn 3.3 5.0 1.5 1.5 5.0 4.0 8.0 6.5 1.0 1.0 9.0 7.0 ns 3-5 * 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 5-4 MC74AC157 MC74ACT157 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 S to Zn 5.0 2.0 9.0 1.5 10.0 ns 3-6 tPHL Propagation Delay S to Zn 5.0 2.0 9.5 2.0 10.5 ns 3-6 tPLH Propagation Delay En to Zn 5.0 1.5 10 1.5 11.5 ns 3-6 tPHL Propagation Delay En to Zn 5.0 1.5 8.5 1.0 9.0 ns 3-6 tPLH Propagation Delay In to Zn 5.0 1.5 7.0 1.0 8.5 ns 3-5 tPHL Propagation Delay In to Zn 5.0 1.5 7.5 1.0 8.5 ns 3-5 * 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 50 pF VCC = 5.0 V FACT DATA 5-5 MC74AC157 MC74ACT157 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: [email protected] –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 5-6 *MC74AC157/D* MC74AC157/D