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74ALS620A Dataheets PDF



Part Number 74ALS620A
Manufacturers NXP
Logo NXP
Description Transceivers
Datasheet 74ALS620A Datasheet74ALS620A Datasheet (PDF)

INTEGRATED CIRCUITS 74ALS620A/74ALS620A–1 74ALS623A/74ALS623A–1 Transceivers Product specification IC05 Data Handbook 1991 Feb 08 Philips Semiconductors Philips Semiconductors Product specification Transceivers 74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1 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 -.

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INTEGRATED CIRCUITS 74ALS620A/74ALS620A–1 74ALS623A/74ALS623A–1 Transceivers Product specification IC05 Data Handbook 1991 Feb 08 Philips Semiconductors Philips Semiconductors Product specification Transceivers 74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1 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 TYPE 74ALS620A/620A-1 74ALS623A/623A-1 TYPICAL PROPAGATION DELAY 4.0ns 4.0ns TYPICAL SUPPLY CURRENT (TOTAL) 33mA 38mA 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. ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS620AN, 74ALS620A-1N 74ALS623AN, 74ALS623A-1N 74ALS620AD, 74ALS620A-1D 74ALS623AD, 74ALS623A-1D DRAWING NUMBER 20-pin plastic DIP 20-pin plastic SOL SOT146-1 SOT163-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS A0 – A7, B0 – B7 OEBA, OEAB A0 – A7, B0 – B7 A0 – A7, B0 – B7 Data inputs Output Enable inputs Data outputs Data outputs (-1 version) DESCRIPTION 74ALS (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 750/240 750/480 LOAD VALUE HIGH/LOW 20µA/0.1mA 20µA/0.1mA 15mA/24mA 15mA/48mA NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state. PIN CONFIGURATION – 74ALS620A/74ALS620A-1 OEAB A0 A1 A2 A3 A4 A5 A6 A7 1 2 3 4 5 6 7 8 9 20 VCC 19 OEBA 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7 PIN CONFIGURATION – 74ALS623A/74ALS623A-1 OEAB A0 A1 A2 A3 A4 A5 A6 A7 1 2 3 4 5 6 7 8 9 20 VCC 19 OEBA 18 B0 17 B1 16 B2 15 B3 14 B4 13 B5 12 B6 11 B7 GND 10 GND 10 SC00101 SC00102 1991 Feb 08 2 853–0020 01670 Philips Semiconductors Product specification Transceivers 74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1 LOGIC SYMBOL – 74ALS620A/74ALS620A-1 2 3 4 5 6 7 8 9 LOGIC SYMBOL – 74ALS623A/74ALS623A-1 2 3 4 5 6 7 8 9 A0 1 19 OEAB OEBA B0 A1 A2 A3 A4 A5 A6 A7 1 19 A0 OEAB OEBA B0 A1 A2 A3 A4 A5 A6 A7 B1 B2 B3 B4 B5 B6 B7 B1 B2 B3 B4 B5 B6 B7 18 VCC = Pin 20 GND = Pin 10 17 16 15 14 13 12 11 18 17 16 15 14 13 12 11 SC00103 VCC = Pin 20 GND = Pin 10 SC00104 IEC/IEEE SYMBOL – 74ALS620A/74ALS620A-1 1 19 IEC/IEEE SYMBOL – 74ALS623A/74ALS623A-1 1 19 EN1 EN2 EN1 EN2 2 1 2 18 2 1 2 18 3 4 5 6 7 8 9 17 16 15 14 13 12 11 3 4 5 6 7 8 9 17 16 15 14 13 12 11 SC00105 SC00106 1991 Feb 08 3 Philips Semiconductors Product specification Transceivers 74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1 LOGIC DIAGRAM – 74ALS620A/74ALS620A-1 OEBA OEAB 19 1 LOGIC DIAGRAM – 74ALS623A/74ALS623A-1 OEBA OEAB 19 1 A0 2 18 B0 A0 2 18 B0 A1 3 17 B1 A1 3 17 B1 A2 4 16 B2 A2 4 16 B2 A3 5 15 B3 A3 5 15 B3 A4 6 14 B4 A4 6 14 B4 A5 7 13 B5 A5 7 13 B5 A6 8 12 B6 A6 8 12 B6 A7 VCC = Pin 20 GND = Pin 10 9 11 B7 VCC = Pin 20 GND = Pin 10 A7 9 11 B7 SC00107 SC00108 FUNCTION TABLE INPUTS OEBA L L H L L H L X Z = = = = High voltage level Low voltage level Don’t care High impedance “off” state OEAB L H L H H 74ALS620A B data to A Bus A data to B Bus Z B data to A Bus A data to B Bus OPERATING MODES 74ALS623A B data to A Bus A data to B Bus Z B data to A Bus A data to B Bus 1991 Feb 08 4 Philips Semiconductors Product specification Transceivers 74ALS620A/74ALS620A-1 74ALS623A/74ALS623A-1 ABSOLUTE MAXIMUM RATINGS (Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free air temperature range.) SYMBOL VCC VIN IIN VOUT IOUT O Tamb Tstg Supply voltage Input voltage Input current Voltage applied.


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