參數(shù)資料
型號(hào)： IDT54FCT646A
廠商： Integrated Device Technology, Inc.
英文描述： Ceramic Chip Capacitors / Standard X7R; Capacitance [nom]: 0.022uF; Working Voltage (Vdc)[max]: 200V; Capacitance Tolerance: +/-10%; Dielectric: Multilayer Ceramic; Temperature Coefficient: X7R; Lead Style: Surface Mount Chip; Lead Dimensions: 1210; Termination: Tin Plated Nickel Barrier; Body Dimensions: 0.126" x 0.098"; Container: Bulk; Features: Unmarked
中文描述： 快速CMOS八端口收發(fā)器/注冊(cè)
文件頁(yè)數(shù)： 2/8頁(yè)
文件大小： 91K
代理商： IDT54FCT646A
7.18
2
IDT54/74FCT646/A/C
FAST CMOS OCTAL TRANSCEIVER/REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
LCC
TOP VIEW
DIP/SOIC/CERPACK
TOP VIEW
FUNCTION TABLE
(2)
Inputs
Data I/O
(1)
A
1
–A
8
Input
Operation or Function
IDT54/74FCT646
G
DIR
X
X
L
L
H
H
CPAB
H or L
↑
X
X
X
H or L
CPBA
H or L
↑
X
H or L
X
X
SAB
X
X
X
X
L
H
SBA
X
X
L
H
X
X
B
1
–B
8
Input
H
H
L
L
L
L
Isolation
Store A and B Data
Real-Time B Data to A Bus
Stored B Data to A Bus
Real-Time A Data to B Bus
Stored A Data to B Bus
Output
Input
Input
Output
NOTES:
1. The data output functions may be enabled or disabled by various signals at the
G
or DIR 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. H = HIGH, L = LOW, X = Don’t Care,
↑
= LOW-to-HIGH Transition.
2536 tbl 02
PIN DESCRIPTION
Pin Names
A
1
–A
8
Description
Data Register A Inputs
Data Register B Outputs
Data Register B Inputs
Data Register A Outputs
Clock Pulse Inputs
Output Data Source Select Inputs
Output Enable Inputs
B
1
–B
8
CPAB, CPBA
SAB, SBA
DIR,
G
2536 tbl 01
LOGIC SYMBOL
5
6
7
8
9
10
11
12
GND
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
1
2
3
4
24
23
22
21
20
19
18
17
16
15
14
13
Vcc
CPBA
SBA
G
CPAB
SAB
DIR
P24-1,
D24-1,
S024-2
&
E24-1
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
2536 drw 06
CPAB
SAB
DIR
CPBA
SBA
G
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
A
5
B
5
A
6
B
6
A
7
B
7
A
8
B
8
5
6
7
8
9
10
11
L28-1
25
24
23
22
21
20
19
INDEX
2536 drw 02
B
1
B
2
NC
G
B
3
B
4
B
5
A
1
A
2
A
3
NC
A
4
A
5
A
6
V
C
S
D
C
S
N
G
A
7
A
8
B
B
7
B
N
12 13 14 15 16 17 18
4
3
2
1
28 27 26
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PDF描述
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