CD54FCT245 Datasheet, PDF (1/7 Pages) Texas Instruments – BiCMOS FCT Interface Logic, Octal-Bus Tranceivers, Three-State

Data sheet acquired from Harris Semiconductor
SCHS271A
January 1997 - Revised October 1999
Features
• Buffered Inputs
•
Typical Propagation
T_A = 25^oC
Delay:
5.0ns
at
V_CC
=
5V,
• 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
CD54FCT245,
CD74FCT245
BiCMOS FCT Interface Logic,
Octal-Bus Tranceivers, Three-State
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.
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.
Pinout
CD54FCT245, CD74FCT245
(PDIP, SOIC)
TOP VIEW
DIR 1
A0 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
GND 10
20 V_CC
19 OE
18 B0
17 B1
16 B2
15 B3
14 B4
13 B5
12 B6
11 B7
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a trademark of Fairchild Semiconductor.
1
Copyright © 1999, Texas Instruments Incorporated