INTEGRATED CIRCUITS
74F620
Octal bus transceiver, inverting (3tate)
74F623
Octal bus transceiver, non±inverting
(3tate)
Product specification |
1989 Apr 06 |
IC15 Data Handbook
m n r
Philips Semiconductors |
Product specification |
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Transceivers |
74F620/74F623 |
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74F620 Octal Bus Transceiver, Inverting (3-State)
74F623 Octal Bus Transceiver, Non-Inverting (3-State)
FEATURES
•High-impedance NPN base inputs for reduced loading (70μA 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 64mA and source 15mA
•74F620, inverting
•74F623, non-inverting
DESCRIPTION
The 74F620 is an octal transceiver featuring inverting 3-State bus-compatible outputs in both send and receive directions. The outputs are capable of sinking 64mA and sourcing up to 15mA, providing very good capacitive drive characteristics. The 74F623 is a non-inverting version of the 74F620.
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing.
These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic levels at the
Enable inputs (OEBA and OEAB). The Enable inputs can be used to disable the device so that the buses are effectively isolated.
The dual-enable configuration gives the 74F620 and 74F623 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 in their last states.
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TYPICAL |
TYPICAL SUPPLY CURRENT |
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TYPE |
PROPAGATION |
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DELAY |
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74F620 |
3.5ns |
80mA |
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74F623 |
4.5ns |
105mA |
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ORDERING INFORMATION
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COMMERCIAL RANGE |
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DESCRIPTION |
VCC = 5V ±10%, |
PKG DWG # |
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Tamb = 0°C to +70°C |
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20-pin plastic DIP |
N74F620N, N74623N |
SOT146-1 |
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20-pin plastic SOL |
N74F620D, N74623D |
SOT163-1 |
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INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
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PINS |
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DESCRIPTION |
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74F(U.L.) |
LOAD VALUE |
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HIGH/LOW |
HIGH/LOW |
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A0 |
- A7, B0 - B7 |
Data inputs |
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3.5/1.16 |
70μA/70μA |
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OEAB |
Output Enable inputs |
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1.0/0.033 |
20μA/20μA |
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OEBA, |
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A0 |
- A7 |
Data outputs |
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150/40 |
3mA/24mA |
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B0 |
- B7 |
Data outputs |
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750/106.7 |
15mA/64mA |
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NOTE: One (1.0) FAST unit load is defined as: 20μA in the High state and 0.6mA in the Low state. |
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PIN CONFIGURATION ± 74F620 |
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PIN CONFIGURATION ± 74F623 |
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OEAB |
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OEAB |
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1 |
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20 |
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VCC |
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1 |
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20 |
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VCC |
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A0 |
2 |
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19 |
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OEBA |
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A0 |
2 |
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19 |
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OEBA |
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B0 |
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B0 |
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A1 |
3 |
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18 |
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A1 |
3 |
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18 |
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B1 |
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B1 |
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A2 |
4 |
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17 |
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A2 |
4 |
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17 |
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B2 |
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B2 |
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A3 |
5 |
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16 |
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A3 |
5 |
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16 |
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B3 |
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B3 |
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A4 |
6 |
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15 |
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A4 |
6 |
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15 |
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B4 |
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B4 |
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A5 |
7 |
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14 |
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A5 |
7 |
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14 |
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B5 |
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B5 |
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A6 |
8 |
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13 |
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A6 |
8 |
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B6 |
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B6 |
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A7 |
9 |
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12 |
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A7 |
9 |
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12 |
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GND |
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B7 |
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GND |
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B7 |
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10 |
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11 |
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10 |
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11 |
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SF01124 |
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SF01124 |
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1990 Apr 6 |
2 |
853±0379 96249 |
Philips Semiconductors |
Product specification |
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Transceivers |
74F620/74F623 |
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LOGIC SYMBOL ± 74F620 |
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LOGIC SYMBOL ± 74F623 |
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A0 |
A1 |
A2 |
A3 |
A4 |
A5 |
A6 |
A7 |
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A0 |
A1 |
A2 |
A3 |
A4 |
A5 |
A6 |
A7 |
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1 |
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OEAB |
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1 |
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OEAB |
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19 |
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OEBA |
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19 |
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OEBA |
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B0 |
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B1 |
B2 |
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B3 |
B4 |
B5 |
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B6 |
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B7 |
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B0 |
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B1 |
B2 |
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B3 |
B4 |
B5 |
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B6 |
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B7 |
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18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
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18 |
17 |
16 |
15 |
14 |
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12 |
11 |
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VCC = |
Pin 20 |
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VCC |
= |
Pin 20 |
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GND = |
Pin 10 |
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SF01125 |
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GND |
= |
Pin 10 |
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SF01126 |
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IEC/IEEE SYMBOL (IEEE/IEC) ± 74F620 |
IEC/IEEE SYMBOL (IEEE/IEC) ± 74F623 |
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1 |
EN1 |
1 |
EN1 |
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19 |
EN2 |
19 |
EN2 |
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2 |
18 |
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18 |
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1 |
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1 |
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2 |
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17 |
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17 |
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4 |
16 |
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16 |
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5 |
15 |
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15 |
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6 |
14 |
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14 |
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7 |
13 |
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8 |
12 |
8 |
12 |
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9 |
11 |
9 |
11 |
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SF01127 |
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SF01128 |
1990 Apr 6 |
3 |
Philips Semiconductors |
Product specification |
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Transceivers |
74F620/74F623 |
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LOGIC DIAGRAM ± 74F620 |
LOGIC DIAGRAM ± 74F623 |
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19 |
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OEBA |
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OEAB 1 |
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A0 |
2 |
18 |
B0 |
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A1 |
3 |
17 |
B1 |
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A2 |
4 |
16 |
B2 |
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A3 |
5 |
15 |
B3 |
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A4 |
6 |
14 |
B4 |
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A5 |
7 |
13 |
B5 |
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A6 |
8 |
12 |
B6 |
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A7 |
9 |
11 |
B7 |
VCC = |
Pin 20 |
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SF01129 |
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GND = |
Pin 10 |
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19 |
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OEBA |
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OEAB 1 |
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A0 |
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18 |
B0 |
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A1 |
3 |
17 |
B1 |
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A2 |
4 |
16 |
B2 |
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A3 |
5 |
15 |
B3 |
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A4 |
6 |
14 |
B4 |
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A5 |
7 |
13 |
B5 |
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A6 |
8 |
12 |
B6 |
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A7 |
9 |
11 |
B7 |
VCC = |
Pin 20 |
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SF01130 |
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GND = |
Pin 10 |
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FUNCTION TABLE
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INPUTS |
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OPERATING MODES |
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OEAB |
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74F620 |
74F623 |
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OEBA |
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L |
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L |
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data to A bus |
B data to A bus |
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B |
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H |
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H |
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data to B bus |
A data to B bus |
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A |
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H |
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L |
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Z |
Z |
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data to A bus |
B data to A bus |
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L |
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H |
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B |
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data to B bus |
A data to B bus |
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A |
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H |
= |
High voltage level |
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L |
= |
Low voltage level |
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X |
= |
Don't care |
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Z |
= |
High impedance ªoffº state |
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1990 Apr 6 |
4 |
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