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參數(shù)資料
| 型號： | 935178990112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | ABT SERIES, OCTAL 1-BIT TRANSCEIVER, TRUE OUTPUT, PDSO24 |
| 封裝： | PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 82K |
| 代理商： | 935178990112 |
Philips Semiconductors
Product specification
74ABT853
8-bit transceiver with 9-bit parity checker/
generator and flag latch (3-State)
1995 Sep 06
2
PIN DESCRIPTION
SYMBOL
PIN NUMBER
NAME AND FUNCTION
A0 – A7
2, 3, 4, 5, 6, 7, 8, 9
A port 3–State inputs/outputs
B0 – B7
23, 22, 21, 20, 19, 18, 17, 16
B port 3–State inputs/outputs
OEA
1
Enables the A outputs when Low
OEB
14
Enables the B outputs when Low
PARITY
15
Parity output/input
ERROR
10
Error output (open collector)
CLEAR
11
Clears the error flag register when Low
ENABLE
13
Enable input (active-Low)
GND
12
Ground (0V)
VCC
24
Positive supply voltage
FUNCTION TABLE
INPUTS
OUTPUTS
MODE
OEB
OEA
An
Σ OF HIGHS
Bn + PARITY
Σ OF HIGHS
An
Bn
PARITY
A data to B bus and generate odd parity output
L
H
Odd
Even
(output)
(input)
An
L
H
B data to A bus and check for parity error1
H
L
(output)
X
Bn
(input)
A bus and B bus disabled2
H
X
Z
A data to B bus and generate inverted parity output
L
Odd
Even
(output)
(input)
An
H
L
NOTES:
1. Error checking is detailed in the Error Flag Function Table below.
2. When ENABLE is Low, ERROR is Low if the sum of A inputs is even or ERROR is High if the sum of A inputs is odd.
ERROR FLAG FUNCTION TABLE
INPUTS
INTERNAL NODE
OUTPUT
MODE
ENABLE
CLEAR
Bn + PARITY
Σ OF HIGHS
POINT ”P”
PRE–STATE
ERRORn–1
ERROR
OUTPUT
Pass
L
Odd
Even
H
L
X
H
L
Sample
L
H
Odd
Even
X
H
L
X
H
X
L
H
L
Clear
H
L
X
H
Store
H
X
L
H
L
H
= High voltage level steady state
L
= Low voltage level steady state
X
= Don’t care
Z
= High impedance ”off” state
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