MC74HCT245 ONSEMI [ON Semiconductor], MC74HCT245 Datasheet

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MC74HCT245

Manufacturer Part Number
MC74HCT245
Description
Octal 3-State Noninverting Bus Transceiver with LSTTL Compatible Inputs
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet

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MC74HCT245A
Octal 3-State Noninverting
Bus Transceiver with LSTTL
Compatible Inputs
High–Performance Silicon–Gate CMOS
device may be used as a level converter for interfacing TTL or NMOS
outputs to High Speed CMOS inputs.
used for 2–way asynchronous communication between data buses.
The device has an active–low Output Enable pin, which is used to
place the I/O ports into high–impedance states. The Direction control
determines whether data flows from A to B or from B to A.
*Equivalent to a two–input NAND gate.
X = Don’t Care
Internal Gate Count*
Internal Gate Propagation Delay
Internal Gate Power Dissipation
Speed Power Product
March, 2000 – Rev. 8
Output
Enable
The MC74HCT245A is identical in pinout to the LS245. This
The MC74HCT245A is a 3–state noninverting transceiver that is
No. 7A
Output Drive Capability: 15 LSTTL Loads
TTL/NMOS Compatible Input Levels
Outputs Directly Interface to CMOS, NMOS and TTL
Operating Voltage Range: 4.5 to 5.5 V
Low Input Current: 1.0 A
In Compliance with the Requirements Defined by JEDEC Standard
Chip Complexity: 304 FETs or 76 Equivalent Gates
Semiconductor Components Industries, LLC, 2000
Control Inputs
OUTPUT ENABLE
H
L
L
PORT
DATA
DIRECTION
Design Criteria
A
Direction
H
X
L
A1
A2
A3
A4
A5
A6
A7
A8
2
3
4
5
6
7
8
9
1
19
FUNCTION TABLE
Data Transmitted from Bus B to Bus A
Data Transmitted from Bus A to Bus B
Buses Isolated (High–Impedance State)
LOGIC DIAGRAM
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Î Î Î
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Î Î Î
Î Î Î
Value
0.005
1.0
5.0
76
Operation
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Units
ea
ns
pJ
W
PIN 20 = V CC
PIN 10 = GND
18
17
16
15
14
13
12
11
B1
B2
B3
B4
B5
B6
B7
B8
1
PORT
DATA
B
20
MC74HCT245AN
MC74HCT245ADW
MC74HCT245ADWR2 SOIC–WIDE
MC74HCT245ADT
MC74HCT245ADTR2
20
20
1
DIRECTION
1
Device
1
ORDERING INFORMATION
A
WL = Wafer Lot
YY = Year
WW = Work Week
GND
SOIC WIDE–20
A1
A3
A4
PIN ASSIGNMENT
A2
A5
A6
A7
A8
http://onsemi.com
DW SUFFIX
CASE 751D
= Assembly Location
CASE 948G
DT SUFFIX
TSSOP–20
1
2
3
4
5
6
7
8
9
10
CASE 738
N SUFFIX
PDIP–20
SOIC–WIDE
TSSOP–20
TSSOP–20
Publication Order Number:
Package
PDIP–20
20
19
18
17
16
15
14
13
12
11
MC74HCT245A/D
20
MC74HCT245AN
20
1
1
V CC
OUTPUT ENABLE
B1
B2
B3
B4
B5
B6
B7
B8
DIAGRAMS
MARKING
AWLYYWW
AWLYYWW
20
HCT245A
1
1000 / Reel
2500 / Reel
1440 / Box
Shipping
38 / Rail
75 / Rail
ALYW
245A
HCT

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MC74HCT245 Summary of contents

Page 1

... Octal 3-State Noninverting Bus Transceiver with LSTTL Compatible Inputs High–Performance Silicon–Gate CMOS The MC74HCT245A is identical in pinout to the LS245. This device may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. The MC74HCT245A is a 3–state noninverting transceiver that is used for 2– ...

Page 2

... Current Current Î Î Î Î Î Î Î Î Î NOTE: Information on typical parametric values can be found in Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D). MC74HCT245A Î Î Î Î Î Î Î Î Value Unit Î Î Î Î Î ...

Page 3

... Power Dissipation Capacitance (Per Enabled Output)* * Used to determine the no–load dynamic power consumption For load considerations, see Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D). MC74HCT245A ( 5 pF, Input 6.0 ns) Î ...

Page 4

... 0 PLH 90% OUTPUT 1 10% t TLH Figure 1. TEST POINT OUTPUT DEVICE UNDER TEST *Includes all probe and jig capacitance Figure 3. MC74HCT245A SWITCHING WAVEFORMS DIRECTION 1.3 V OUTPUT 1.3 V 3.0 V ENABLE t PZL GND t PHL 1 PZH 1 THL TEST POINT ...

Page 5

... MC74HCT245A EXPANDED LOGIC DIAGRAM DATA PORT DIRECTION 19 OUTPUT ENABLE http://onsemi.com DATA PORT ...

Page 6

... SEATING PLANE 0.25 (0.010 20X T 0. 18X MC74HCT245A PACKAGE DIMENSIONS PDIP–20 N SUFFIX PLASTIC DIP PACKAGE CASE 738–03 ISSUE 0.25 (0.010 SO–20 DW SUFFIX CASE 751D–05 ...

Page 7

... L PIN 1 IDENT 1 0.15 (0.006 –V– 0.100 (0.004) –T– SEATING PLANE MC74HCT245A PACKAGE DIMENSIONS TSSOP–20 DT SUFFIX CASE 948E–02 ISSUE Í Í Í Í Í Í Í Í B Í Í Í Í ...

Page 8

... Email: ONlit–asia@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–8549 Phone: 81–3–5740–2745 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 MC74HCT245A/D ...

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