HD74BC623A Datasheet, PDF (1/8 Pages) Hitachi Semiconductor – Octal Bus Transceivers With 3 State Outputs

HD74BC623A
Octal Bus Transceivers With 3 State Outputs
REJ03D0289–0200Z
(Previous ADE-205-025 (Z))
Rev.2.00
Jul.16.2004
Description
The HD74BC623A provides high drivability and operation equal to or better than high speed bipolar standard logic IC
by using Bi-CMOS process. The device features low power dissipation that is about 1/5 of high speed bipolar logic IC.
When the frequency is 10 MHz. The device has eight bus transceivers with three state outputs in a 20 pin package.
This device allows 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 (GBA and GAB). The enable inputs can be used to disable the device so that the buses
are effectively isolated.
Features
• Input/Output are at high impedance state when power supply is off.
• Input pins can be open, when not used, owing to built in input pull up circuit.
• Input is TTL level.
• Wide operating temperature range
Ta = –40 to +85°C.
• Ordering Information
Part Name
HD74BC623AFPEL
Package Type Package Code
Package
Abbreviation
SOP-20 pin (JEITA) FP-20DAV
FP
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
Function Table
Enable Inputs
GBA
L
L
H
H
H
L
L
H
H : High level
L : Low level
GAB
B data to A bus
A data to B bus
Isolation
B data to A bus
A data to B bus
Operation
Rev.2.00, Jul.16.2004, page 1 of 7