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參數資料
| 型號： | MC74F648DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS |
| 中文描述： | F/FAST SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDSO24 |
| 封裝： | SOIC-24 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 115K |
| 代理商： | MC74F648DW |
4-241
FAST AND LS TTL DATA
Product Preview
OCTAL TRANSCEIVER/REGISTER
WITH 3-STATE OUTPUTS
These devices consist of bus transceiver circuits with 3-state D-type
flip-flops, and control circuitry arranged for multiplexed transmission of data
directly from the input bus or from the internal registers. Data on the A or B
bus will be clocked into the registers as the appropriate clock pin goes to a
high logic level. Output Enable (OE) and DIR pins are provided to control the
transceiver function. In the transceiver mode, data present at the high
impedance port may be stored in either the A or the B register or in both. The
select controls can multiplex stored and real-time (transparent mode) data.
The direction control determines which bus will receive data when the enable
OE is Active LOW. In the isolation mode (OE HIGH), A data may be stored
in the B register and/or B data may be stored in the A register.
Independent Registers for A and B
Multiplexed Real-Time and Stored Data
Choice of True (F646) and Inverting (F648) Data Paths
3-State Outputs
PIN ASSIGNMENTS
22
21
20
19
18
17
1
2
3
4
A0
5
6
7
A3
24
23
8
A4
VCC
CPAB
CPBA SBA
OE
B0
B2
B1
B3
SAB DIR
A1
A2
9
10
A6
11
A7
12
GND
A5
16
15
14
13
B4
B6
B5
B7
F646
22
21
20
19
18
17
1
2
3
4
A0
5
6
7
A3
24
23
8
A4
VCC
CPAB
CPBA SBA
OE
B0
B2
B1
B3
SAB DIR
A1
A2
9
10
A6
11
A7
12
GND
A5
16
15
14
13
B4
B6
B5
B7
F648
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
F646
CPAB
SAB
DIR
CPBA
SBA
OE
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
F648
CPAB
SAB
DIR
CPBA
SBA
OE
LOGIC SYMBOLS
1
2
3
23
22
21
20
19
18
17
16
15
14
13
4
5
6
7
8
9
10
11
20
19
18
17
16
15
14
13
1
2
3
23
22
21
4
5
6
7
8
9
10
11
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
MC54/74F646
MC54/74F648
OCTAL TRANSCEIVER/REGISTER
WITH 3-STATE OUTPUTS
FAST
SCHOTTKY TTL
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXDW
Ceramic
Plastic
SOIC
N SUFFIX
PLASTIC
CASE 724-03
DW SUFFIX
SOIC
CASE 751E-03
24
1
24
1
J SUFFIX
CERAMIC
CASE 758-01
24
1
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