鈥?Power off disable outputs permit 鈥渓ive insertion鈥?/div>
鈥?Typical V
OLP
(Output Ground Bounce) < 1.0V at
V
CC
= 5V, T
A
= 25擄C
鈥?Features for FCT162543T/AT/CT/ET:
鈥?Balanced Output Drivers:
鹵24mA
(commercial),
鹵16mA
(military)
鈥?Reduced system switching noise
鈥?Typical V
OLP
(Output Ground Bounce) < 0.6V at
V
CC
= 5V,T
A
= 25擄C
DESCRIPTION:
The FCT16543T/AT/CT/ET and FCT162543T/AT/CT/ET
16-bit latched transceivers are built using advanced dual metal
CMOS technology. These high-speed, low-power devices are
organized as two independent 8-bit D-type latched transceiv-
ers with separate input and output control to permit indepen-
dent control of data flow in either direction. For example, the A-
to-B Enable (x
CEAB
) must be LOW in order to enter data from
the A port or to output data from the B port. x
LEAB
controls the
latch function. When x
LEAB
is LOW, the latches are transpar-
ent. A subsequent LOW-to-HIGH transition of x
LEAB
signal
puts the A latches in the storage mode. x
OEAB
performs output
enable function on the B port. Data flow from the B port to the
A port is similar but requires using x
CEBA
, x
LEBA
, and x
OEBA
inputs. Flow-through organization of signal pins simplifies
layout. All inputs are designed with hysteresis for improved
noise margin.
The FCT16543T/AT/CT/ET are ideally suited for driving
high-capacitance loads and low-impedance backplanes. The
output buffers are designed with power off disable capability to
allow "live insertion" of boards when used as backplane drivers.
with current limiting resistors. This offers low ground bounce,
minimal undershoot, and controlled output fall times鈥搑educing
the need for external series terminating resistors. The
FCT162543T/AT/CT/ET are plug-in replacements for the
FCT16543T/AT/CT/ET and 54/74ABT16543 for on-board bus
interface applications.
FUNCTIONAL BLOCK DIAGRAM
1
OEBA
1
CEBA
1
LEBA
1
OEAB
1
CEAB
1
LEAB
2
OEBA
2
CEBA
2
LEBA
2
OEAB
2
CEAB
2
LEAB
C
1
A
1
2
A
1
C
1
B
1
D
C
D
D
C
D
2
B
1
TO 7 OTHER CHANNELS
2618 drw 01
TO 7 OTHER CHANNELS
2618 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
漏1996
Integrated Device Technology, Inc.
SEPTEMBER 1996
DSC-2618/7
5.12
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