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MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3-State Inputs/Outputs
The MC74AC245/74ACT245 contains eight non-inverting bidirectional buffers with 3-state outputs and is intended for bus-oriented applications. Current sinking capability is 24 mA at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a High Z condition.
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PDIP-20 N SUFFIX CASE 738
20 1
* * * *
Noninverting Buffers Bidirectional Data Path A and B Outputs Source/Sink 24 mA ACT245 Has TTL Compatible Inputs
VCC 20 OE 19 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11
20 1
SO-20 DW SUFFIX CASE 751
20 1
TSSOP-20 DT SUFFIX CASE 948E EIAJ-20 M SUFFIX CASE 967
20 1
ORDERING INFORMATION
Device 1 T/R 2 A0 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 GND MC74AC245N MC74ACT245N MC74AC245DW MC74AC245DWR2 Package PDIP-20 PDIP-20 SOIC-20 SOIC-20 SOIC-20 SOIC-20 TSSOP-20 Shipping 18 Units/Rail 18 Units/Rail 38 Units/Rail 1000 Tape & Reel 38 Units/Rail 1000 Tape & Reel 75 Units/Rail
Figure 1.
PIN ASSIGNMENT
PIN OE T/R A0-A7 B0-B7 FUNCTION
MC74ACT245DW MC74ACT245DWR2
Output Enable Input Transmit/Receive Input Side A 3-State Inputs or 3-State Outputs Side B 3-State Inputs or 3-State Outputs MC74AC245DT MC74AC245DTR2 MC74ACT245DT MC74ACT245DTR2
TSSOP-20 2500 Tape & Reel TSSOP-20 75 Units/Rail
TSSOP-20 2500 Tape & Reel EIAJ-20 EIAJ-20 EIAJ-20 EIAJ-20 40 Units/Rail 2000 Tape & Reel 40 Units/Rail 2000 Tape & Reel
TRUTH TABLES
Inputs Outputs O tp ts OE L L H T/R L H X Bus B Data to Bus A Bus A Data to Bus B High Z State
MC74AC245M MC74AC245MEL MC74ACT245M MC74ACT245MEL
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial
DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 6 of this data sheet.
(c) Semiconductor Components Industries, LLC, 2001
1
May, 2001 - Rev. 5
Publication Order Number: MC74AC245/D
MC74AC245, MC74ACT245
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 Supply Voltage DC Input Voltage, Output Voltage (Ref. to GND) VCC @ 3.0 V tr, tf Input Rise and Fall Time (Note 1) AC Devices except Schmitt Inputs VCC @ 4.5 V VCC @ 5.5 V tr, tf TJ TA IOH IOL In ut 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 @ 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 - - - - ns/V - 140 85 -24 24 C C mA mA ns/V V V Unit
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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MC74AC245, MC74ACT245
DC CHARACTERISTICS
74AC Symbol Parameter VCC (V) TA = +25C Typ VIH Minimum High Level u g ee Input Voltage Maximum Low Level a u o ee Input Voltage Minimum High Level u g ee 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 a u o ee Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 IIN IOZT Maximum Input a u u Leakage Current Maximum a u 3-State C Current Minimum Dynamic Output C O t t Current t Maximum Quiescent a u Qu esce Supply Current 5.5 55 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 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 1 0 V VOUT = 0.1 V or VCC - 0.1 V VOUT = 0.1 V or VCC - 0.1 V IOUT = -50 A V *VIN = VIL or VIH -12 mA IOH -24 mA -24 mA IOUT = 50 A 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
VIL
V
VOH
V
V
A
5.5 5.5 5.5 5.5 55
- - - -
0.6 - - 8.0 80
6.0 75 -75 80.0 80 0
A mA mA A
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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MC74AC245, MC74ACT245
AC CHARACTERISTICS (For Figures and Waveforms - See Section 3)
74AC Symbol Parameter VCC* (V) Min tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation Delay An to Bn or Bn to An Propagation Delay An to Bn or Bn to An 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 1.5 1.5 1.5 1.5 2.5 1.5 2.5 1.5 2.0 1.5 2.0 1.5 TA = +25C CL = 50 pF Typ 5.0 3.5 5.0 3.5 7.0 5.0 7.5 5.5 6.5 5.5 7.0 5.5 Max 8.5 6.5 8.5 6.0 11.5 8.5 12.0 9.0 12.0 9.0 11.5 9.0 74AC TA = -40C to +85C CL = 50 pF Min 1.0 1.0 1.0 1.0 2.0 1.0 2.0 1.0 1.0 1.0 1.5 1.0 Max 9.0 7.0 9.0 7.0 12.5 9.0 13.5 9.5 12.5 10.0 13.0 10.0 ns ns ns ns ns ns 3-5 3-5 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.
DC CHARACTERISTICS
74ACT Symbol Parameter VCC (V) TA = +25C Typ VIH VIL VOH Minimum High Level u g ee Input Voltage Maximum Low Level a u o ee Input Voltage Minimum High Level u g ee Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 4.5 5.5 VOL Maximum Low Level a u o ee Output Voltage 4.5 5.5 4.5 5.5 IIN ICCT IOZT Maximum Input a u u Leakage Current Additional Max. ICC/Input Maximum a u 3-State Current C Minimum Dynamic O t t Current t Output C Maximum Quiescent Supply Current 55 5.5 5.5 5.5 5.5 5.5 5.5 55 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 0.1 - 0.6 - - 8.0 80 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 1.0 1.5 6.0 75 -75 80.0 80 0 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 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
A mA A mA mA A
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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MC74AC245, MC74ACT245
AC CHARACTERISTICS (For Figures and Waveforms - See Section 3)
74ACT Symbol Parameter VCC* (V) Min tPLH tPHL tPZH tPZL tPHZ tPLZ Pro agation Propagation Delay An to Bn or Bn to An Propagation Delay Pro agation An to Bn or Bn to An Output Enable Time Output Enable Time Output Disable Time Output Disable Time 5.0 50 50 5.0 5.0 5.0 5.0 5.0 1.5 15 15 1.5 1.5 1.5 1.5 2.0 TA = +25C CL = 50 pF Typ 4.0 40 40 4.0 5.0 5.5 5.5 5.0 Max 7.5 75 80 8.0 10 10 10 10 74ACT TA = -40C to +85C CL = 50 pF Min 1.5 15 10 1.0 1.5 1.5 1.0 1.5 Max 8.0 80 90 9.0 11.0 12.0 11.0 11.0 ns ns ns ns ns ns 3-5 3-5 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 CI/O CPD Input Capacitance Input/Output Capacitance Power Dissipation Capacitance Parameter Value Typ 4.5 15 45 Unit pF pF pF Test Conditions VCC = 5.0 V VCC = 5.0 V VCC = 5.0 V
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MC74AC245, MC74ACT245
MARKING DIAGRAMS
PDIP-20 MC74AC245N AWLYYWW SO-20 AC245 AWLYYWW TSSOP-20 EIAJ-20
AC 245 ALYW
74AC245 AWLYWW
MC74ACT245N AWLYYWW
ACT245 AWLYYWW
ACT 245 ALYW
74ACT245 AWLYWW
A WL, L YY, Y WW, W
= Assembly Location = Wafer Lot = Year = Work Week
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MC74AC245, MC74ACT245
PACKAGE DIMENSIONS
PDIP-20 N SUFFIX 20 PIN PLASTIC DIP PACKAGE CASE 738-03 ISSUE E
-A-
20 1 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. DIM A B C D E F G J K L M N INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 0_ 15 _ 0.020 0.040 MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0_ 15_ 0.51 1.01
B
10
C
L
-T-
SEATING PLANE
K M E G F D
20 PL
N J 0.25 (0.010)
M 20 PL
0.25 (0.010) TA
M
M
TB
M
SO-20 DW SUFFIX 20 PIN PLASTIC SOIC PACKAGE CASE 751D-05 ISSUE F
D q
NOTES: 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A A1 B C D E e H h L q MILLIMETERS MIN MAX 2.35 2.65 0.10 0.25 0.35 0.49 0.23 0.32 12.65 12.95 7.40 7.60 1.27 BSC 10.05 10.55 0.25 0.75 0.50 0.90 0_ 7_
A
11 X 45 _
H
M
B
M
20
10X
0.25
E
1
10
20X
B 0.25
M
B TA
S
B
S
A
SEATING PLANE
h
18X
e
A1
T
C
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L
MC74AC245, MC74ACT245
PACKAGE DIMENSIONS
TSSOP-20 DT SUFFIX 20 PIN PLASTIC TSSOP PACKAGE CASE 948E-02 ISSUE A
20X
K REF
M
0.15 (0.006) T U
S
0.10 (0.004)
TU
S
V
S
2X
L/2
B L
PIN 1 IDENT 1 10
J J1
-U-
SECTION N-N 0.25 (0.010) M
N 0.15 (0.006) T U
S
A -V- N F
C D 0.100 (0.004) -T- SEATING
PLANE
G
H
DETAIL E
EIAJ-20 M SUFFIX 20 PIN PLASTIC EIAJ PACKAGE CASE 967-01 ISSUE O
20
11
LE Q1 M_ L DETAIL P
E HE
1
10
Z D e VIEW P A
b 0.13 (0.005)
M
A1 0.10 (0.004)
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III III III
DETAIL E
20
11
K K1
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 6.40 6.60 4.30 4.50 --1.20 0.05 0.15 0.50 0.75 0.65 BSC 0.27 0.37 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 BSC 0_ 8_ INCHES MIN MAX 0.252 0.260 0.169 0.177 --0.047 0.002 0.006 0.020 0.030 0.026 BSC 0.011 0.015 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252 BSC 0_ 8_
-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 12.35 12.80 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 --0.81 INCHES MIN MAX --0.081 0.002 0.008 0.014 0.020 0.007 0.011 0.486 0.504 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 --0.032
c
MC74AC245, MC74ACT245
Notes
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MC74AC245, MC74ACT245
Notes
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MC74AC245, MC74ACT245
Notes
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MC74AC245, MC74ACT245
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MC74AC245/D

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