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74ACT1284MSA Arkusz danych(PDF) 1 Page - Fairchild Semiconductor

Numer części 74ACT1284MSA
Szczegółowy opis  IEEE 1284 Transceiver
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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© 1999 Fairchild Semiconductor Corporation
DS011683
www.fairchildsemi.com
June 1996
Revised November 1999
74ACT1284
IEEE 1284 Transceiver
General Description
The 74ACT1284 contains four non-inverting bidirectional
buffers and three non-inverting buffers with open Drain out-
puts and high drive capability on the B Ports. It is intended
to provide a standard signaling method for a bi-direction
parallel peripheral in an Extended Capabilities Port mode
(ECP).
The HD (active HIGH) input pin enables the B Ports to
switch from open Drain to a high drive totem pole output,
capable of sourcing 14 mA on all seven buffers. The DIR
input determines the direction of data flow on the bidirec-
tional buffers. DIR (active HIGH) enables data flow from A
Ports to B Ports. DIR (active LOW) enables data flow from
B Ports to A Ports.
Features
s TTL-compatible inputs
s A Ports have standard 4 mA totem pole outputs
s Typical input hysteresis of 0.5V
s B Port high drive source/sink capability of 14 mA
s Bidirectional non-inverting buffers
s Supports IEEE P1284 Level 1 and Level 2 signaling
standards for bidirectional parallel communications
between personal computers and printing peripherals
s B Port outputs in High Impedance mode during power
down
s Guaranteed 4000V minimum ESD protection
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
FACT
 is a trademark of Fairchild Semiconductor Corporation.
Order Number
Package Number
Package Description
74ACT1284SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACT1284MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ACT1284MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names
Description
HD
High Drive Enable input (Active HIGH)
DIR
Direction Control Input
A1 - A4
Side A Inputs or Outputs
B1 - B4
Side B Inputs or Outputs
A5 - A7
Side A Inputs
B5 - B7
Side B Outputs


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