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參數(shù)資料
| 型號： | MC74F245 |
| 廠商： | Motorola, Inc. |
| 英文描述： | OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS |
| 中文描述： | 八路雙向收發(fā)器具有三態(tài)輸入/輸出 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大小： | 46K |
| 代理商： | MC74F245 |
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
4-115
FAST AND LS TTL DATA
3
OCTAL BIDIRECTIONAL
TRANSCEIVER WITH
3-STATE INPUTS/OUTPUTS
The MC54/74F245 contains eight noninverting bidirectional buffers with
3-state outputs and is intended for bus-oriented applications. Current sinking
capability is 24 mA at the A ports and 64 mA at the B ports. The Transmit/Re-
ceive (T/R) input determines the direction of data flow through the bidirectional
transceiver. Transmit (active HIGH) enables data from A ports to B ports; Re-
ceive (active LOW) enables data from B ports to A ports. The Output Enable
input, when HIGH, disables both A and B ports by placing them in a high-Z
condition.
Noninverting Buffers
Bidirectional Data Path
B Outputs Sink 64 mA
ESD >4000 Volts
11
12
13
14
15
16
17
18
19
VCC
20
1
2
3
4
5
6
7
OE
B0
B1
B2
B4
B3
A1
T/R
A0
A2
A3
A5
A4
CONNECTION DIAGRAM
(TOP VIEW)
8
9
10
B5
B7
B6
A6
GND
A7
FUNCTION TABLE
Inputs
OE
T/R
Output
L
L
H
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
High-Z State
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54, 74
4.5
5.0
5.5
V
TA
Operating Ambient Temperature Range
54
–55
25
125
°
C
74
0
25
70
IOH
Output Current — High
An Outputs
54, 74
–3.0
mA
IOL
Output Current — Low
An Outputs
74
24
mA
54
20
mA
IOH
Output Current — High
Bn Outputs
54
74
–12
–15
mA
IOL
Output Current — Low
Bn Outputs
54
74
48
64
mA
DW SUFFIX
SOIC
CASE 751D-03
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
J SUFFIX
CERAMIC
CASE 732-03
20
1
MC54/74F245
OCTAL BIDIRECTIONAL
TRANSCEIVER WITH 3-STATE
INPUTS/OUTPUTS
FAST
SCHOTTKY TTL
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXDW
Ceramic
Plastic
SOIC
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