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.
http://onsemi.com
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.
©
Semiconductor Components Industries, LLC, 2001
1
May, 2001 – Rev. 5
Publication Order Number:
MC74AC245/D
ONSEMI [ ON SEMICONDUCTOR ]
