Loading...Philips 74ALS623AN, 74ALS623A-1N, 74ALS623A-1D, 74ALS620AN, 74ALS620A-1N Datasheet
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INTEGRATED CIRCUITS
74ALS620A/74ALS620A±1
74ALS623A/74ALS623A±1
Transceivers
Product specification |
1991 Feb 08 |
IC05 Data Handbook |
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Philips Semiconductors |
Product specification |
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Transceivers |
74ALS620A/74ALS620A-1 |
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74ALS623A/74ALS623A-1 |
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74ALS620A/74ALS620A-1 Octal bus transceiver, inverting (3-State) 74ALS623A/74ALS623A-1 Octal bus transceiver, non-inverting (3-State)
FEATURES
•Octal bidirectional bus interface
•3-State buffer outputs sink 24mA and source 15mA
•The -1 version sinks 48mA IOL within the +5% VCC range
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TYPICAL |
TYPICAL |
TYPE |
PROPAGATION |
SUPPLY CURRENT |
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DELAY |
(TOTAL) |
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74ALS620A/620A-1 |
4.0ns |
33mA |
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74ALS623A/623A-1 |
4.0ns |
38mA |
ORDERING INFORMATION
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ORDER CODE |
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DRAWING |
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COMMERCIAL RANGE |
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DESCRIPTION |
VCC = 5V ±10%, |
NUMBER |
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Tamb = 0°C to +70°C |
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20-pin plastic DIP |
74ALS620AN, 74ALS620A-1N |
SOT146-1 |
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74ALS623AN, 74ALS623A-1N |
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20-pin plastic SOL |
74ALS620AD, 74ALS620A-1D |
SOT163-1 |
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74ALS623AD, 74ALS623A-1D |
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DESCRIPTION
The 74ALS620A and 74ALS623A are octal transceiver featuring 3-State bus compatible outputs in both transmit and receive directions. The 74ALS620A is an inverting version of the 74ALS623A. The outputs are capable of sinking 24mA and sourcing up to 15mA, providing very good capacitive drive characteristics.
The outputs for the 74ALS620A-1 and 74ALS623A are capable of sinking up to 48mA when within the ±5% VCC range.
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 B bus to A bus, depending on 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 74ALS620A and 74ALS623A 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 the bus lines (16 in all) will remain at their last states.
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
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PINS |
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DESCRIPTION |
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74ALS (U.L.) |
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LOAD VALUE |
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HIGH/LOW |
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HIGH/LOW |
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A0 ± A7, B0 ± B7 |
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Data inputs |
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1.0/1.0 |
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20μA/0.1mA |
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OEAB |
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Output Enable inputs |
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1.0/1.0 |
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20μA/0.1mA |
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OEBA, |
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A0 ± A7, B0 ± B7 |
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Data outputs |
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750/240 |
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15mA/24mA |
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A0 ± A7, B0 ± B7 |
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Data outputs (-1 version) |
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750/480 |
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15mA/48mA |
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NOTE: One (1.0) ALS unit load is defined as: 20μA in the High state and 0.1mA in the Low state. |
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PIN CONFIGURATION ± 74ALS620A/74ALS620A-1 |
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PIN CONFIGURATION ± 74ALS623A/74ALS623A-1 |
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OEAB |
1 |
20 |
VCC |
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OEAB |
1 |
20 |
VCC |
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A0 |
2 |
19 |
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A0 |
2 |
19 |
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OEBA |
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OEBA |
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A1 |
3 |
18 |
B0 |
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A1 |
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18 |
B0 |
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A2 |
4 |
17 |
B1 |
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A2 |
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17 |
B1 |
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A3 |
5 |
16 |
B2 |
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A3 |
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16 |
B2 |
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A4 |
6 |
15 |
B3 |
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A4 |
6 |
15 |
B3 |
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A5 |
7 |
14 |
B4 |
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A5 |
7 |
14 |
B4 |
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A6 |
8 |
13 |
B5 |
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A6 |
8 |
13 |
B5 |
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A7 |
9 |
12 |
B6 |
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A7 |
9 |
12 |
B6 |
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GND |
10 |
11 |
B7 |
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GND |
10 |
11 |
B7 |
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SC00101 |
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SC00102 |
1991 Feb 08 |
2 |
853±0020 01670 |
Philips Semiconductors |
Product specification |
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Transceivers
74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1
LOGIC SYMBOL ± 74ALS620A/74ALS620A-1 |
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LOGIC SYMBOL ± 74ALS623A/74ALS623A-1 |
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2 |
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2 |
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8 |
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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 |
B1 |
B2 |
B3 |
B4 |
B5 |
B6 |
B7 |
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B0 |
B1 |
B2 |
B3 |
B4 |
B5 |
B6 |
B7 |
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18 |
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15 |
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11 |
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18 |
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16 |
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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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SC00103 |
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GND = Pin 10 |
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SC00104 |
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IEC/IEEE SYMBOL ± 74ALS620A/74ALS620A-1 |
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IEC/IEEE SYMBOL ± 74ALS623A/74ALS623A-1 |
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1 |
EN1 |
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19 |
EN2 |
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2 |
1 |
18 |
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2 |
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17 |
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16 |
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15 |
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14 |
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13 |
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12 |
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1 |
EN1 |
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19 |
EN2 |
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2 |
1 |
18 |
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2 |
3 |
17 |
4 |
16 |
5 |
15 |
6 |
14 |
7 |
13 |
8 |
12 |
9 |
11 |
SC00105 |
SC00106 |
1991 Feb 08 |
3 |
Philips Semiconductors |
Product specification |
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Transceivers
74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1
LOGIC DIAGRAM ± 74ALS620A/74ALS620A-1
19 |
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OEBA |
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1 |
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OEAB |
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2 |
18 |
A0 |
B0 |
3 |
17 |
A1 |
B1 |
4 |
16 |
A2 |
B2 |
5 |
15 |
A3 |
B3 |
6 |
14 |
A4 |
B4 |
7 |
13 |
A5 |
B5 |
8 |
12 |
A6 |
B6 |
9 |
11 |
A7 |
B7 |
VCC = Pin 20
GND = Pin 10
SC00107
LOGIC DIAGRAM ± 74ALS623A/74ALS623A-1
19 |
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OEBA |
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1 |
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OEAB |
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2 |
18 |
A0 |
B0 |
3 |
17 |
A1 |
B1 |
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16 |
A2 |
B2 |
5 |
15 |
A3 |
B3 |
6 |
14 |
A4 |
B4 |
7 |
13 |
A5 |
B5 |
8 |
12 |
A6 |
B6 |
9 |
11 |
A7 |
B7 |
VCC = Pin 20
GND = Pin 10
SC00108
FUNCTION TABLE
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INPUTS |
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OPERATING MODES |
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OEAB |
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74ALS620A |
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74ALS623A |
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OEBA |
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L |
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L |
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data to A Bus |
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B data to A Bus |
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B |
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L |
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H |
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data to B Bus |
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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 |
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Z |
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L |
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H |
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data to A Bus |
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B data to A Bus |
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B |
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L |
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H |
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data to B Bus |
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A data to B Bus |
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A |
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H |
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High voltage level |
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L |
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Low voltage level |
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X |
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Don't care |
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Z |
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High impedance ªoffº state |
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1991 Feb 08 |
4 |
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