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參數資料
| 型號： | MC74F623N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 總線收發器 |
| 英文描述： | F/FAST SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20 |
| 封裝： | 738-03 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 197K |
| 代理商： | MC74F623N |
4-383
FAST AND LS TTL DATA
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
(INVERTING AND NONINVERTING)
The MC74F620 is an octal bus transceiver featuring inverting 3-state bus-
compatible outputs in both send and receive directions. The BN outputs are
capable of sinking 64 mA and sourcing up to 15 mA, providing very good ca-
pacitive drive characteristics. The MC74F623 is a non-inverting version of the
MC74F620. These octal bus transceivers are designed for asynchronous
two-way communication between data busses. The control function imple-
mentation allows for maximum flexibility in timing. These devices allow data
transmission from the A bus to the B bus or from B bus to A bus, depending
upon the logic levels at the Enable inputs (OEBA and OEAB). The Enable in-
puts can be used to disable the device so that the busses are effectively iso-
lated. The dual-enable configuration gives the MC74F620 and MC74F623 the
capability to store data by the simultaneous enabling of OEBA and OEAB.
Each output reinforces its input in this transceiver configuration. Thus, when
both control inputs are enabled and all other data sources to the two sets of
the bus lines are at high impedance, both sets of bus lines (16 in all) will remain
at their last states.
High Impedance NPN base inputs for reduced loading (70 A in High
and Low states)
Ideal for Applications which Require High Output drive and minimal bus
loading
Octal Bidirectional Bus Interface
3-State Buffer Outputs Sink 64 mA and Source 15 mA
– F620 Inverting
– F623 Noninverting
ESD Protection > 4000 Volts
F620
18
17
16
15
14
13
1
2
3
4
5
6
7
20
19
8
VCC
OEAB
OEBA B0 B1 B2
B4
B3
B5
A0 A1 A2 A3 A4 A5 A6
9
10
A7 GND
12
11
B6
B7
F623
18
17
16
15
14
13
1
2
3
4
5
6
7
20
19
8
VCC
OEAB
OEBA B0 B1 B2
B4
B3
B5
A0 A1 A2 A3 A4 A5 A6
9
10
A7 GND
12
11
B6
B7
PIN ASSIGNMENTS
MC74F620
MC74F623
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
(INVERTING AND NONINVERTING)
FAST
SCHOTTKY TTL
ORDERING INFORMATION
MC74FXXXJ
Ceramic
MC74FXXXN
Plastic
MC74FXXXDW
SOIC
20
1
J SUFFIX
CERAMIC
CASE 732-03
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03
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