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54ABT646F 数据表(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 54ABT646F
功能描述  Octal Transceivers and Registers with TRI-STATE Outputs
Download  14 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

54ABT646F 数据表(HTML) 3 Page - National Semiconductor (TI)

  54ABT646F Datasheet HTML 1Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 2Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 3Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 4Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 5Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 6Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 7Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 8Page - National Semiconductor (TI) 54ABT646F Datasheet HTML 9Page - National Semiconductor (TI) Next Button
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Connection Diagrams (Continued)
Inputs
Data I/O
(Note 1)
Function
OE
DIR
CPAB
CPBA
SAB SBA A
0–A7
B
0–B7
H
X
H or L
H or L
X
X
Isolation
HX
N
X
X
X
Input
Input
Clock A
n Data into A Register
HX
X
N
X
X
Clock B
n Data into B Register
LH
X
X
L
X
A
n to Bn — Real Time (Transparent Mode)
LH
N
X
L
X
Input
Output
Clock A
n Data into A Register
L
H
H or L
X
H
X
A Register to B
n (Stored Mode)
LH
N
X
H
X
Clock A
n Data into A Register and Output to Bn
LL
X
X
X
L
B
n to An — Real Time (Transparent Mode)
LL
X
N
X
L
Output
Input
Clock B
n Data into B Register
L
L
X
H or L
X
H
B Register to A
n (Stored Mode)
LL
X
N
X
H
Clock B
n Data into B Register and Output to An
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
N = LOW-to-HIGH Transition
Note 1: The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled; i.e., data at
the bus pins will be stored on every LOW-to-HIGH transition of the appropriate clock inputs.
Real Time Transfer
A-Bus to B-Bus
DS100209-5
FIGURE 1.
Real Time Transfer
B-Bus to A-Bus
DS100209-6
FIGURE 2.
Storage from
Bus to Register
DS100209-7
FIGURE 3.
Transfer from
Register to Bus
DS100209-8
FIGURE 4.
3
www.national.com


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