MC74HCT245A ON Semiconductor, MC74HCT245A Datasheet

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MC74HCT245A

Manufacturer Part Number
MC74HCT245A
Description
Manufacturer
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.
Features
*Equivalent to a two−input NAND gate.
X = Don’t Care
OUTPUT ENABLE
© Semiconductor Components Industries, LLC, 2007
January, 2007 − Rev. 10
FUNCTION TABLE
Output Enable
Internal Gate Count*
Internal Gate Propagation Delay
Internal Gate Power Dissipation
Speed Power Product
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 V to 5.5 V
Low Input Current: 1.0 mA
In Compliance with the Requirements Defined by JEDEC Standard
Chip Complexity: 304 FETs or 76 Equivalent Gates
Pb−Free Packages are Available
PORT
DATA
DIRECTION
A
Control Inputs
H
L
L
A1
A2
A3
A4
A5
A6
A7
A8
Design Criteria
1
19
2
3
4
5
6
7
8
9
Direction
Figure 1. Logic Diagram
H
X
L
Data Transmitted from Bus B to Bus A
Data Transmitted from Bus A to Bus B
Buses Isolated (High−Impedance State)
Operation
PIN 20 = V
PIN 10 = GND
Value
0.005
1.0
5.0
76
18
17
16
15
14
13
12
11
CC
B1
B2
B3
B4
B5
B6
B7
B8
Units
mW
PORT
ea
ns
pJ
DATA
B
1
See detailed ordering, shipping information, and marking
information in the package dimensions section on page 6 of
this data sheet.
1
DIRECTION
ORDERING INFORMATION
1
1
GND
1
A4
A1
A2
A3
A5
A6
A7
A8
http://onsemi.com
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
Publication Order Number:
20
19
18
17
16
15
14
13
12
11
MC74HCT245A/D
DW SUFFIX
CASE 751D
CASE 948E
SOEIAJ−20
DT SUFFIX
SOIC−20W
TSSOP−20
CASE 738
N SUFFIX
CASE 967
V
OUTPUT ENABLE
B1
B2
B3
B4
B5
B6
B7
B8
F SUFFIX
PDIP−20
CC

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MC74HCT245A 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

... Input Rise and Fall Time (Figure Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î MC74HCT245A Î Î Î Î Î Î Î Î Value Unit Î Î Î Î Î Î ...

Page 3

... Power Dissipation Capacitance (Per Enabled Output Used to determine the no−load dynamic power consumption Semiconductor High−Speed CMOS Data Book (DL129/D). MC74HCT245A (Voltages Referenced to GND) Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 4

... INPUT OUTPUT DIRECTION OUTPUT ENABLE TEST POINT OUTPUT DEVICE UNDER TEST *Includes all probe and jig capacitance Figure 4. MC74HCT245A SWITCHING WAVEFORMS 2.7 V 1 PLH PHL 90% 1 TLH THL Figure 2. 3.0 V 1.3 V 1.3 V GND 3 ...

Page 5

... MC74HCT245A DATA PORT DIRECTION 19 OUTPUT ENABLE Figure 6. Expanded Logic Diagram http://onsemi.com DATA PORT ...

Page 6

... MC74HCT245ANG MC74HCT245ADW MC74HCT245ADWG MC74HCT245ADWR2 MC74HCT245ADWR2G MC74HCT245ADT MC74HCT245ADTG MC74HCT245ADTR2 MC74HCT245ADTR2G MC74HCT245AFELG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *These packages are inherently Pb−Free. PDIP−20 20 MC74HCT245AN AWLYYWWG 1 TSSOP− ...

Page 7

... SEATING PLANE 20X 0. 18X MC74HCT245A PACKAGE DIMENSIONS PDIP−20 N SUFFIX PLASTIC DIP PACKAGE CASE 738−03 ISSUE 0.25 (0.010) 0.25 (0.010 SOIC−20W DW SUFFIX CASE 751D−05 ...

Page 8

... L PIN 1 IDENT 1 0.15 (0.006 −V− 0.100 (0.004) −T− SEATING PLANE 16X 0.36 MC74HCT245A PACKAGE DIMENSIONS TSSOP−20 DT SUFFIX CASE 948E−02 ISSUE Í Í Í Í Í Í Í Í Í Í Í Í ...

Page 9

... BSC H 7.40 8.20 0.291 0.323 E L 0.50 0.85 0.020 0.033 L 1.10 1.50 0.043 0.059 0.70 0.90 0.028 0.035 1 Z −−− 0.81 −−− 0.032 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative MC74HCT245A/D ...

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