74F543SC Fairchild Semiconductor, 74F543SC Datasheet - Page 2

• Manufacturer Part Number: 74F543SC
• Description: IC TRANSCVR 8BIT N-INV 24SOIC
• Manufacturer: Fairchild Semiconductor
• Series: 74Fr

Specifications of 74F543SC

• Logic Type: Registered Transceiver, Non-Inverting
• Number Of Elements: 1
• Number Of Bits Per Element: 8
• Current - Output High, Low: 15mA, 64mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 74F543SC.

www.fairchildsemi.com
Unit Loading/Fan Out
Functional Description
The F543 contains 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 A
take data from B
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. Con-
trol of data flow from B to A is similar, but using the CEBA,
LEBA and OEBA inputs.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
OEAB
OEBA
CEAB
CEBA
LEAB
LEBA
A
B
Pin Names
0
0
–A
–B
7
7
0
–B
7
, as indicated in the Data I/O Control
A-to-B Output Enable Input (Active LOW)
B-to-A Output Enable Input (Active LOW)
A-to-B Enable Input (Active LOW)
B-to-A Enable Input (Active LOW)
A-to-B Latch Enable Input (Active LOW)
B-to-A Latch Enable Input (Active LOW)
A-to-B Data Inputs or
B-to-A 3-STATE Outputs
B-to-A Data Inputs or
A-to-B 3-STATE Outputs
Description
0
–A
7
or
2
Data I/O Control Table
H
L
X
A-to-B data flow shown; B-to-A flow control is the same, except using
CEBA, LEBA and OEBA
CEAB
LOW Voltage Level
HIGH Voltage Level
Immaterial
H
X
X
L
L
600/106.6 (80)
150/40 (33.8)
HIGH/LOW
3.5/1.083
3.5/1.083
1.0/1.0
1.0/1.0
1.0/2.0
1.0/2.0
1.0/1.0
1.0/1.0
U.L.
Inputs
LEAB
X
H
X
X
L
OEAB
X
X
X
H
L
12 mA/64 mA (48 mA)
3 mA/24 mA (20 mA)
Transparent
Output I
20 A/ 0.6 mA
20 A/ 0.6 mA
20 A/ 1.2 mA
20 A/ 1.2 mA
20 A/ 0.6 mA
20 A/ 0.6 mA
70 A/ 650 A
70 A/ 650 A
Latched
Latched
Status
Latch
Input I
—
—
IH
OH
/I
/I
IL
OL
Buffers
Output
Driving
High Z
High Z
—
—