MC74ACT245 Motorola, MC74ACT245 Datasheet

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MC74ACT245

Manufacturer Part Number
MC74ACT245
Description
OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS
Manufacturer
Motorola
Datasheet

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( DataSheet : www.DataSheet4U.com )
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Octal Bidirectional T ransceiver
with 3 State Inputs/Outputs
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.
PIN NAMES
OE
T/R
A 0 –A 7
B 0 –B 7
TRUTH TABLES
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
OE
H
Noninverting Buffers
Bidirectional Data Path
A and B Outputs Source/Sink 24 mA
L
L
V CC
ACT245 Has TTL Compatible Inputs
The MC74AC245/74ACT245 contains eight non-inverting bidirectional buffers
Inputs
T/R
20
1
T/R
H
L
X
OE
19
A 0
Output Enable Input
Transmit/Receive Input
Side A 3-State Inputs or 3-State Outputs
Side B 3-State Inputs or 3-State Outputs
2
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
B 0
18
A 1
3
Outputs
Outputs
B 1
17
A 2
4
B 2
16
A 3
5
B 3
15
A 4
6
B 4
14
A 5
7
B 5
A 6
13
8
B 6
A 7
12
9
GND
B 7
10
11
FACT DATA
5-1
MC74ACT245
MC74AC245
OCTAL BIDIRECTIONAL
INPUTS/OUTPUTS
TRANSCEIVER
WITH 3-STATE
CASE 751D-04
CASE 738-03
DW SUFFIX
N SUFFIX
PLASTIC
PLASTIC
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MC74ACT245 Summary of contents

Page 1

... High Z State H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial www.DataSheet4U.com GND FACT DATA 5-1 MC74AC245 MC74ACT245 OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS N SUFFIX CASE 738-03 PLASTIC DW SUFFIX CASE 751D-04 PLASTIC www.DataSheet4U.com ...

Page 2

... MC74AC245 MC74ACT245 MAXIMUM RATINGS* Symbol Supply Voltage (Referenced to GND Input Voltage (Referenced to GND) V out DC Output Voltage (Referenced to GND Input Current, per Pin I out DC Output Sink/Source Current, per Pin GND Current per Output Pin T stg Storage Temperature * Maximum Ratings are those values beyond which damage to the device may occur ...

Page 3

... MC74AC245 MC74ACT245 DC CHARACTERISTICS Symbol Symbol Parameter Parameter V IH Minimum High Level Input Voltage Input Voltage V IL Maximum Low Level Input Voltage Input Voltage V OH Minimum High Level Output Voltage Output Voltage V OL Maximum Low Level Output Voltage Output Voltage I IN Maximum Input ...

Page 4

... MC74AC245 MC74ACT245 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Symbol Parameter Parameter Propagation Delay t PLH t PLH Propagation Delay t PHL t PHL PZH t PZH Output Enable Time Output Enable Time ...

Page 5

... MC74AC245 MC74ACT245 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Symbol Parameter Parameter Propagation Delay t PLH t PLH Propagation Delay t PHL t PHL ...

Page 6

... MC74AC245 MC74ACT245 –A– –T– SEATING PLANE –A– –B– 20X 0.010 (0.25 18X K Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

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