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Renesas - Octal Bus Transceivers

Numéro de référence HD74BC645A
Description Octal Bus Transceivers
Fabricant Renesas 
Logo Renesas 





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HD74BC645A fiche technique
HD74BC645A
Octal Bus Transceivers With 3 State Outputs
REJ03D0291–0200Z
(Previous ADE-205-027 (Z))
Rev.2.00
Jul.16.2004
Description
The HD74BC645A 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.
Each device has an active low enable input (G) and a direction control input, DiR. When DiR is high, data flows from
the A inputs to the B outputs. When DiR is high, data flows from the B inputs to the A outputs. When enable inputs
(G) is high, disables both A and B ports by placing then in a high impedance.
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
HD74BC645AFPEL
Package Type Package Code
Package
Abbreviation
SOP-20 pin (JEITA) FP-20DAV
FP
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
Function Table
Control Inputs
G
L
L
H
H : High level
L : Low level
X : Immaterial
Z : High impedance
L
H
X
DIR
B data to A bus
A data to B bus
Z
Operation
Rev.2.00, Jul.16.2004, page 1 of 7

PagesPages 7
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