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July 2003

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HIGH SPEED:

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LOW POWER DISSIPATION:

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TTL COMPATIBLE INPUTS

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OPERATING VOLTAGE RANGE:

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A Port have standard 4mA totem pole output

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B Port high drive source/sink capability of

14mA

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Support IEEE Std 1284-I (level 1 type) and

IEEE Std 1284-II (level 2 type) for bidirectional

parallel communications between personal

computer and printing peripherals.

DESCRIPTION

The 74ACT1284 contains four high-speed non-in-

verting bidirectional buffers and three non-invert-

ing buffers with open drain outputs fabricated in

It’s intended to provide a standard signaling meth-

od for a bidirection parallel peripheral in an Ex-

tended 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 14mA on all sev-

en buffers. The DIR input determines the direction

of data flow on the bidirectional buffers.

DIR (active High) enables data flow from A Port to

B Port. DIR (active Low) enables data flow from B

Port to A Port.

ESD protection is greater than 2000V per Method

3015.7 of MIL-STD-883B. It’s available in the

commercial temperature ranges.

74ACT1284

HIGH SPEED IEEE1284 TRANSCEIVER

ORDER CODES

PACKAGE

TUBE

T & R

SOP

74ACT1284M

74ACT1284MTR

TSSOP

74ACT1284TTR

TSSOP

SOP

PIN CONNECTION