74ALS623A

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


Pinout




Specifications

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

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.
The 74ALS623A 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 74ALS623A 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.