MC74AC245 Datasheet, PDF (1/12 Pages) ON Semiconductor – OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS

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.
• Noninverting Buffers
• Bidirectional Data Path
• A and B Outputs Source/Sink 24 mA
• ′ACT245 Has TTL Compatible Inputs
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
Figure 1.
PIN ASSIGNMENT
PIN
FUNCTION
OE
Output Enable Input
T/R
Transmit/Receive Input
A0–A7
B0–B7
Side A 3–State Inputs or 3–State Outputs
Side B 3–State Inputs or 3–State Outputs
TRUTH TABLES
Inputs
OE T/R
Outputs
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X High Z State
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
http://onsemi.com
20
1
20
1
20
1
PDIP–20
N SUFFIX
CASE 738
SO–20
DW SUFFIX
CASE 751
TSSOP–20
DT SUFFIX
CASE 948E
20
1
EIAJ–20
M SUFFIX
CASE 967
ORDERING INFORMATION
Device
Package
Shipping
MC74AC245N
PDIP–20 18 Units/Rail
MC74ACT245N
PDIP–20 18 Units/Rail
MC74AC245DW
SOIC–20 38 Units/Rail
MC74AC245DWR2 SOIC–20 1000 Tape & Reel
MC74ACT245DW SOIC–20 38 Units/Rail
MC74ACT245DWR2 SOIC–20 1000 Tape & Reel
MC74AC245DT
TSSOP–20 75 Units/Rail
MC74AC245DTR2 TSSOP–20 2500 Tape & Reel
MC74ACT245DT TSSOP–20 75 Units/Rail
MC74ACT245DTR2 TSSOP–20 2500 Tape & Reel
MC74AC245M
EIAJ–20 40 Units/Rail
MC74AC245MEL
EIAJ–20 2000 Tape & Reel
MC74ACT245M
EIAJ–20 40 Units/Rail
MC74ACT245MEL EIAJ–20 2000 Tape & Reel
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