參數(shù)資料
型號(hào): MC74F3893A
廠(chǎng)商: Motorola, Inc.
英文描述: QUAD FUTUREBUS BACKPLANE TRANSCEIVER
中文描述: 四FUTUREBUS背板收發(fā)器
文件頁(yè)數(shù): 2/5頁(yè)
文件大?。?/td> 46K
代理商: MC74F3893A
4-274
FAST AND LS TTL DATA
MC74F3893A
LOGIC DIAGRAM
I/O0
I/O1
I/O2
I/O3
D0
D1
D2
D3
R0
R1
R2
R3
DE
RE
VCC = PIN 1: LOGIC GND = PIN 6
BUS GND = PIN 13,16, 19: BG GND = PIN 20
2
3
4
5
7
8
9
10
11
14
15
12
17
18
FUNCTION TABLE
Inputs
Input/Output
Outputs
Operating Mode
DE
RE
Dn
L
H
I/On
H
L
Rn
L
H
H
H
L
L
Transmit to Bus
H
L
H
H
L
H
Dn
H
Z
Z
Receiver 3-State,
Transmit to Bus
L
L
L
L
X
X
H
L
L
H
Receive, I/On = Inputs
H = HIGH voltage level:
L = LOW voltage level:
X = Don’t care:
Z = HIGH impedance “Off” state.
RECOMMENDED OPERATING CONDITIONS
Limits
Symbol
Parameter
Min
Typ
Max
Unit
VCC
VIH
VIL
IIK
VTH
IOH
IOL
TA
Supply Voltage
4.5
5.0
5.5
V
High-Level Input Voltage
Dn, DE, RE
2.0
V
Low-Level Input Voltage
0.8
V
Input Clamp Current
–18
mA
Bus Input Threshold
I/On Only
Rn Only
1.475
1.550
1.625
V
Output Current
High
–3.0
mA
Output Current
Low
100
mA
Operating Ambient Temperature Range
0
70
°
C
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