PI74FCT543T Datasheet, PDF (1/5 Pages) Pericom Semiconductor Corporation – Fast CMOS Latched Transceivers

PI74FCT543T/544T
(25Ω Series) PI74FCT2543T
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Product Features:
• PI74FCT543T/544/2543T is pin compatible with bipolar
FAST™ Series at a higher speed and lower power
consumption
• 25Ω series resistor on all outputs
• TTL input and output levels
• Low ground bounce outputs
• Extremely low static power
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 24-pin 300 mil wide plastic DIP (P)
– 24-pin 150 mil wide plastic QSOP (Q)
– 24-pin 150 mil wide plastic TQSOP (R)
– 24-pin 300 mil wide plastic SOIC (S)
• Device models available on request
PI74FCT543/544/2543T Logic Block Diagram
Fast CMOS
Latched Transceivers
Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are
produced in the Company’s advanced 0.8 micron CMOS
technology, achieving industry leading speed grades. All
PI74FCT2XXX devices have a built-in 25 ohm series resistor on
all outputs to reduce noise because of reflections, thus eliminating
the need for an external terminating resistor.
The PI74FCT543T/544T and PI74FCT2543T is an 8-bit wide
non-inverting transceiver designed with 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 Truth Table. With CEAB
LOW, a LOW signal 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
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
CEAB, LEAB, and OEAB inputs. The PI74FCT543T is a non-
inverting of the PI74FCT544T.
A0
A1
A2
A3
A4
A5
A6
A7
OEBA
CEBA
LEBA
DQ
LE
DETAIL A
QD
LE
DETAIL A x 7
B0
B1
B2
B3
B4
B5
B6
B7
NOTE: PI74FCT543/2543T function is shown.
1
OEAB
CEAB
LEAB
PS2020A 03/11/96