© 2005 Fairchild Semiconductor Corporation DS010236 www.fairchildsemi.com
July 1989
Revised March 2005
7
4
AC
Q245 • 74AC
T
Q
2
4
5

Qui
e
t Seri
es
G165

Oct
a
l
B
i
di
rect
ional
T
r
anscei
ver

wit
h
3-ST
A
T
E
I
nput
s/
O
u
t
put
s
74ACQ245 74ACTQ245
Quiet SeriesG165 Octal Bidirectional Transceiver
with 3-STATE Inputs/Outputs
General Description
The ACQ/ACTQ245 contains eight non-inverting bidirec-
tional buffers with 3-STATE outputs and is intended for bus-
oriented applications. Current sinking capability is 24 mA at
both the A and B ports. The Transmit/Receive (T/R) input
determines the direction of data flow through the bidirec-
tional transceiver. Transmit (active-HIGH) enables data
from A Ports to B Ports; Receive (active-LOW) enables
data from B Ports to A Ports. The Output Enable input,
when HIGH, disables both A and B ports by placing them in
a HIGH Z condition.
The ACQ/ACTQ utilizes Fairchild Quiet Seriesc165 technol-
ogy to guarantee quiet output switching and improve
dynamic threshold performance. FACT Quiet Seriesc165 fea-
tures GTOc165 output control and undershoot corrector in
addition to a split ground bus for superior performance.
Features
a73 I
CC
and I
OZ
reduced by 50%
a73 Guaranteed simultaneous switching noise level and
dynamic threshold performance
a73 Guaranteed pin-to-pin skew AC performance
a73 Improved latch-up immunity
a73 3-STATE outputs drive bus lines or buffer memory
address registers
a73 Outputs source/sink 24 mA
a73 Faster prop delays than the standard ACT245

Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
FACTc165, Quiet Seriesc165, FACT Quiet Seriesc165, and GTOc165 are trademarks of Fairchild Semiconductor Corporation.
Order Number
Package
Package Description
Number
74ACQ245SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ACQ245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACQ245PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
74ACTQ245SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ACTQ245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ245QSC MQA20 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
74ACTQ245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74ACTQ245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACTQ245MTCX_NL
(Note 1)
MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
74ACTQ245PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide