IDT74FCT543 Datasheet, PDF (1/7 Pages) Integrated Device Technology – FAST CMOS OCTAL LATCHED TRANSCEIVER

®
Integrated Device Technology, Inc.
FAST CMOS
OCTAL LATCHED
TRANSCEIVER
IDT54/74FCT543
IDT54/74FCT543A
IDT54/74FCT543C
FEATURES:
• IDT54/74FCT543 equivalent to FAST™ speed
• IDT54/74FCT543A 25% faster than FAST
• IDT54/74FCT543C 40% faster than FAST
• Equivalent to FAST output drive over full temperature
and voltage supply extremes
• IOL = 64mA (commercial), 48mA (military)
• Separate controls for data flow in each direction
• Back-to-back latches for storage
• CMOS power levels (1mW typ. static)
• Substantially lower input current levels than FAST
(5µA max.)
• TTL input and output level compatible
• CMOS output level compatible
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
DESCRIPTION:
The IDT54/74FCT543/A/C is a non-inverting octal trans-
ceiver built using an advanced dual metal CMOS technology.
These devices contain two sets of eight D-type latches with
separate input and output controls for each set. For data flow
from A to B, for example, the A-to-B Enable (CEAB) input must
be LOW in order to enter data from A0–A7 or to take data from
B0–B7, as indicated in the Function Table. With CEAB LOW,
a LOW signal on the A-to-B Latch Enable (LEAB) input makes
the A-to-B latches transparent; a subsequent LOW-to-HIGH
transition of the LEAB signal puts the A latches in the storage
mode and their outputs no longer change with the A inputs.
With CEAB and OEAB both LOW, the 3-state B output buffers
are active and reflect the data present at the output of the A
latches. Control of data from B to A is similar, but uses the
CEBA, LEBA and OEBA inputs.
FUNCTIONAL BLOCK DIAGRAMS
DQ
LE
A0
DETAIL A
B0
QD
LE
A1
A2
A3
A4
A5
A6
A7
OEBA
CEBA
LEBA
DETAIL A x 7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a registered trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1992 Integrated Device Technology, Inc.
7.17
B1
B2
B3
B4
B5
B6
B7
OEAB
CEAB
LEAB
2614 drw 01
MAY 1992
DSC-4602/3
1