IDT74FCT543 Integrated Device Technology, IDT74FCT543 Datasheet - Page 2

• Manufacturer Part Number: IDT74FCT543
• Description: Fast Cmos Octal Latched Transceiver
• Manufacturer: Integrated Device Technology

IDT54/74FCT543/A/C
FAST CMOS OCTAL LATCHED TRANSCEIVER
PIN CONFIGURATIONS
IDT54/74FCT861 10-BIT TRANSCEIVERS
PIN DESCRIPTION
LOGIC SYMBOL
Pin Names
OEAB
OEBA
CEAB
CEBA
LEAB
LEBA
A
B
0
0
–A
–B
7
7
OEBA
CEAB
LEBA
GND
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
A
A
A
A
A
A
A
A
LEAB CEAB CEBA LEBA
A
A
A
A
A
A
A
A
OEBA
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
DIP/SOIC/CERPACK
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
SO24-2
P24-1,
D24-1,
E24-1
&
Description
24
23
22
21
20
19
18
17
16
15
14
13
OEAB
B
B
B
B
B
B
B
B
0
1
2
3
4
5
6
7
Vcc
CEBA
B
B
B
B
B
B
B
B
LEAB
OEAB
2614 drw 03
0
1
2
3
4
5
6
7
2614 tbl 02
7.17
FUNCTION TABLE
For A-to-B (Symmetric with B-to-A)
NOTES:
1. * Before
2. A-to-B data flow shown; B-to-A flow control is the same, except using
CEAB
CEAB
H = HIGH Voltage Level
L = LOW Voltage Level
— = Don’t Care or Irrelevant
CEBA
—
—
H
L
L
,
LEBA
Inputs
LEAB
LEAB
LEAB
INDEX
MILITARY AND COMMERCIAL TEMPERATURE RANGES
—
—
H
H
L
NC
A
A
A
A
A
A
and
3
4
5
6
1
2
LOW-to-HIGH Transition
OEBA
OEAB
OEAB
5
6
7
8
9
10
11
—
—
H
12 13 14 15 16 17 18
L
L
4
.
3 2
(1,2)
TOP VIEW
L28-1
Storing
Storing
Transparent
Storing
LCC
1
Status
A-to-B
Latch
28 27 26
—
25
24
23
22
21
20
19
High Z
High Z
Current A Inputs
Previous* A Inputs
2614 drw 02
B
B
B
B
B
B
NC
1
2
3
4
5
6
Buffers
Output
B
0
—
–B
7
2614 tbl 01
2