74ACT1284SCX View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

74ACT1284SCX

IEEE 1284 Transceiver

Fairchild Semiconductor 

June 1996

Revised November 2000

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:

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

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

Pin Descriptions

Pin Names

HD

DIR

A1 - A4

B1 - B4

A5 - A7

B5 - B7

Description

High Drive Enable input (Active HIGH)

Direction Control Input

Side A Inputs or Outputs

Side B Inputs or Outputs

Side A Inputs

Side B Outputs

FACT is a trademark of Fairchild Semiconductor Corporation.

© 2000 Fairchild Semiconductor Corporation DS011683

www.fairchildsemi.com

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