74FCT245
器件描述：BiCMOS FCT Interface Logic, Octal-Bus Tranceivers, Three-State
器件厂商：TI [Texas Instruments]
厂商主页：http://www.ti.com/
文件大小：39.64KB，共7页
Sponsor by e络盟器件资料摘要：
1
Data sheet acquired from Harris Semiconductor
SCHS271A
Features
• Buffered Inputs
• Typical Propagation Delay: 5.0ns at V
CC
= 5V,
T
A
= 25
o
C
• 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 V
CC
= 5V
• Controlled Output Edge Rates
• Input/Output Isolation to V
CC
• 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 V
CC
. This resultant
lowering of output swing (0V to 3.7V) reduces power bus
ringing (a source of EMI) and minimizes V
CC
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 (
o
C) 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
1DIR
A0
A1
A2
A3
A4
A6
A5
A7
GND
V
CC
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
Data sheet acquired from Harris Semiconductor
SCHS271A
Features
• Buffered Inputs
• Typical Propagation Delay: 5.0ns at V
CC
= 5V,
T
A
= 25
o
C
• 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 V
CC
= 5V
• Controlled Output Edge Rates
• Input/Output Isolation to V
CC
• 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 V
CC
. This resultant
lowering of output swing (0V to 3.7V) reduces power bus
ringing (a source of EMI) and minimizes V
CC
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 (
o
C) 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
1DIR
A0
A1
A2
A3
A4
A6
A5
A7
GND
V
CC
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