QS54/74FCT245T, 2245T
Q
Q
UALITY
S
EMICONDUCTOR,
I
NC.
FEATURES/BENEFITS
High-Speed CMOS
8-Bit
Tranceivers
DESCRIPTION
QS54/74FCT245T
QS54/74FCT2245T
鈥?Pin and function compatible to the 74F245
74FCT245/645 and 74ABT245
鈥?Industrial temperature 鈥?0擄C to 85擄C
鈥?CMOS power levels: <7.5mW static
鈥?Available in DIP, SOIC, QSOP, ZIP, HQSOP
鈥?Undershoot clamp diodes on all inputs
鈥?TTL-compatible input and output levels
鈥?Ground bounce controlled outputs
鈥?Reduced output swing of 0-3.5V
鈥?Military product compliant to MIL-STD-883,
Class B
FCT-T 245T
鈥?JEDEC-FCT spec compatible
鈥?Std., A, C, and D speed grades; 3.8ns t
PD
for D
鈥?I
OL
= 64mA Ind., 48mA Mil.
FCT-T 2245T
鈥?Built-in 25鈩?series resistor outputs reduce
reflection and other system noise
鈥?Std., A, and C speed grades; 4.1ns t
PD
for C
鈥?I
OL
= 12mA Ind.
The QSFCT245 and QSFCT2245 are 8-bit non-
inverting transceivers that have three-state outputs
which are useful for bus-oriented applications. The
Transmit/Receive (T/R) input determines the direc-
tion of data flow, either from A to B or B to A, and the
Output Enable (OE) input enables the selected port
for output. The FCT2245 is a 25鈩?resistor output
version useful for driving transmission lines and
reducing system noise. The 2245 parts can replace
the 245 series to reduce noise in an existing design.
All inputs have clamp diode for undershoot noise
suppression. All outputs have ground bounce sup-
pression (see QSI Application Note AN-001), and
outputs will not load an active bus when V
CC
is
removed from the device.
om
C
ny
pa
Figure 1. Functional Block Diagram
o
N
an
w
T/R
OE
25鈩?/div>
Ai
25鈩?/div>
Bi
FCT2245
Only
MDSL-00012-04
DECEMBER 28, 1998
QUALITY SEMICONDUCTOR, INC.
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