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Description: The 74ALS620A and 74ALS623A are octal transceiver featuring 3-State bus compatible outputs in both transmit and receive...


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74ALS620A1 General 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.

74ALS620A1 Maximum Ratings

SYMBOL PARAMETER RATING UNIT
VCC Supply voltage -0.5 to +7.0 V
VIN Input voltage -0.5 to +7.0 V
IIN Input current 30 to +5 mA
VOUT Voltage applied to output in High output state -0.5 to VCC V
IOUT Current applied to outputin Low output state All versions 48 mA
-1 version 96 mA
Tamb Operating free-air temperature range 0 to +70
Tstg Storage temperature range -65 to +150

74ALS620A1 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

74ALS620A1 Connection Diagram

74ALS620A1 Connection Diagram

74ALS620A1 datasheet

74ABH16244ADGG
PDF/DataSheet Download

  • Datasheet: 74ABH16244ADGG
  • File Size: 77546 KB
  • Manufacturer: PHILIPS [Philips Semiconductors]
  • Click here to Download

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