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CD54FCT245 데이터시트(PDF) 1 Page - Texas Instruments

부품명 CD54FCT245
상세설명  BiCMOS FCT Interface Logic, Octal-Bus Tranceivers, Three-State
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홈페이지  http://www.ti.com
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CD54FCT245 데이터시트(HTML) 1 Page - Texas Instruments

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Data sheet acquired from Harris Semiconductor
SCHS271A
Features
• Buffered Inputs
• Typical Propagation Delay: 5.0ns at VCC = 5V,
TA = 25
oC
• Noninverting
• SCR Latchup Resistant BiCMOS Process and
Circuit Design
• Speed of Bipolar FAST™/AS/S
• 64mA Output Sink Current (74 Series)
• 48mA Output Sink Current (54 Series)
• Output Voltage Swing Limited to 3.7V at VCC = 5V
• Controlled Output Edge Rates
• Input/Output Isolation to VCC
• BiCMOS Technology with Low Quiescent Power
Description
The CD54/74FCT245 octal bus transceiver uses a small
geometry BiCMOS technology. The output stage is a combi-
nation of bipolar and CMOS transistors that limits the output
HIGH level to two diode drops below VCC. This resultant
lowering of output swing (0V to 3.7V) reduces power bus
ringing (a source of EMI) and minimizes VCC bounce and
ground bounce and their effects during simultaneous output
switching. The output configuration also enhances switching
speed and is capable of sinking 48mA to 64mA.
The CD54/74FCT245 is a noninverting, three-state, bidirec-
tional transceiver/buffer intended for two-way transmission
from”A” bus to “B” bus or “B” bus to “A” bus. The logic level
present on the Direction Input (DIR) determines the data direc-
tion. When the Output Enable input is HIGH, the outputs are in
the high impedance state.
Pinout
Ordering Information
PART NUMBER
TEMP.
RANGE (oC)
PACKAGE
PKG.
NO.
CD74FCT245E
0 to 70
20 Ld PDIP
E20.3
CD74FCT245M
0 to 70
20 Ld SOIC
M20.3
CD54FCT245E
-55 to 125
20 Ld PDIP
E20.3
NOTE: When ordering the suffix M and SM packages, use the entire
part number. Add the suffix 96 to obtain the variant in the tape and reel.
CD54FCT245, CD74FCT245
(PDIP, SOIC)
TOP VIEW
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
DIR
A0
A1
A2
A3
A4
A6
A5
A7
GND
VCC
B0
B1
B2
B3
B4
B5
B6
B7
OE
January 1997 - Revised October 1999
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a trademark of Fairchild Semiconductor.
Copyright
© 1999, Texas Instruments Incorporated
CD54FCT245,
CD74FCT245
BiCMOS FCT Interface Logic,
Octal-Bus Tranceivers, Three-State


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