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74FR240PC bảng dữ liệu(PDF) 1 Page - Fairchild Semiconductor

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© 1999 Fairchild Semiconductor Corporation
DS010901
www.fairchildsemi.com
October 1991
Revised August 1999
74FR240
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The 74FR240 is an inverting octal buffer and line driver
designed to be employed as memory and address driver,
clock driver and bus oriented transmitter or receiver.
Features
s 3-STATE outputs drive bus lines or buffer memory
address registers
s Outputs sink 64 mA and source 15 mA
s Guaranteed pin-to-pin skew
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Truth Tables
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Z
= High Impedance
Order Number
Package Number
Package Description
74FR240SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74FR240SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74FR240PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Pin Names
Description
OE1, OE2
Output Enable Input (Active-LOW)
I0–I7
Inputs
O0–O7
Outputs
Inputs
Outputs
OE1
In
(Pins 12, 14, 16, 18)
LL
H
LH
L
HX
Z
Inputs
Outputs
OE2
In
(Pins 3, 5, 7, 9)
LL
H
LH
L
HX
Z


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