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IDT54FCT646CTQB Datasheet(PDF) 3 Page - Integrated Device Technology

Part # IDT54FCT646CTQB
Description  FAST CMOS OCTAL TRANSCEIVER/ REGISTERS (3-STATE)
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT54FCT646CTQB Datasheet(HTML) 3 Page - Integrated Device Technology

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IDT54/74FCT646/2646/652/2652T/AT/CT/DT, 648T/AT/CT
FAST CMOS OCTAL TRANSCEIVER/REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.20
3
FUNCTION TABLE (646/648)
FUNCTION TABLE (652)
Inputs
Data I/O(1)
Operation or Function
G
G
DIR
CPAB
CPBA
SAB
SBA
A1 - A8
B1 - B8
FCT646T/FCT2646T
FCT648T
H
H
X
X
H or L
H or L
X
X
X
X
Input
Input
Isolation
Store A and B Data
Isolation
Store A and B Data
L
L
L
L
X
X
X
H or L
X
X
L
H
Output
Input
Real-Time B Data to A Bus
Stored B Data to A Bus
Real-Time
B Data to A Bus
Stored
B Data to A Bus
L
L
H
H
X
H or L
X
X
L
H
X
X
Input
Output
Real-Time A Data to B Bus
Stored A Data to B Bus
Real-Time
A Data to B Bus
Stored
A Data to B Bus
2634 tbl 02
Inputs
Data I/O
Operation or Function
GAB
GBA
GBA CPAB CPBA SAB SBA
A1 - A8
B1 - B8
FCT652T/FCT2652T
L
L
H
H
H or L
H or L
X
X
X
X
Input
Input
Isolation
Store A and B Data
X
H
H
H
H or L
X
X(2)
X
X
Input
Input
Unspecified(1)
Output
Store A, Hold B
Store A in Both Registers
L
L
X
L
H or L
X
X
X
X(2)
Unspecified(1)
Output
Input
Input
Hold A, Store B
Store B in Both Registers
L
L
L
L
X
X
X
H or L
X
X
L
H
Output
Input
Real-Time B Data to A Bus
Stored B Data to A Bus
H
H
H
H
X
H or L
X
X
L
H
X
X
Input
Output
Real-Time A Data to B Bus
Stored A Data to B Bus
H
L
H or L
H or L
H
H
Output
Output
Stored A Data to B Bus and Stored B Data to A Bus
NOTES:
2634 tbl 03
1. The data output functions may be enabled or disabled by various signals at the GAB or GBA inputs. Data
input functions are always enabled, i.e. data at the bus pins will be stored on every LOW-to-HIGH transition
on the clock inputs.
2. Select control = L: clocks can occur simultaneously.
Select control = H: clocks must be staggered in order to load both registers.
H = HIGH, L = LOW, X = Don't Care,
≠ = LOW-to-HIGH transition.
3.
A in B Register.
4.
B in A Register.


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