4.5-V to 5.5-V VCC Operation

1.4-kΩ Pullup Resistors Integrated on All

Open-Drain Outputs Eliminate the Need for

Discrete Resistors

Designed for IEEE Std 1284-I (Level-1 Type)

and IEEE Std 1284-II (Level-2 Type)

Electrical Specifications

Flow-Through Architecture Optimizes PCB

Layout

Latch-Up Performance Exceeds 250 mA Per

JEDEC 17

ESD Protection Exceeds JESD 22

– 4000-V Human-Body Model (A114-A)

– 300-V Machine Model (A115-A)

– 2000-V Charged-Device Model (C101)

description/ordering information

The SN74LV161284 is designed for 4.5-V to

5.5-V VCC operation. This device provides

asynchronous two-way communication between

data buses. The control-function implementation

minimizes external timing requirements.

This device has eight bidirectional bits; data can

flow in the A-to-B direction when DIR is high, and

in the B-to-A direction when DIR is low. This

device also has five drivers, which drive the cable

side, and four receivers. The SN74LV161284 has

one receiver dedicated to the HOST LOGIC line

and a driver to drive the PERI LOGIC line.

The output drive mode is determined by the high-drive (HD) control pin. When HD is high, the B, Y, and

PERI LOGIC OUT outputs are in a totem-pole configuration, and in an open-drain configuration when HD is low.

This meets the drive requirements as specified in the IEEE Std 1284-I (level-1 type) and IEEE Std 1284-II

(level-2 type) parallel peripheral-interface specifications. Except for HOST LOGIC IN and PERI LOGIC OUT,

all cable-side pins have a 1.4-kΩ integrated pullup resistor. The pullup resistor is switched off if the associated

output driver is in the low state or if the output voltage is above VCC CABLE. If VCC CABLE is off,

PERI LOGIC OUT is set to low.

The device has two supply voltages. VCC is designed for 4.5-V to 5.5-V operation. VCC CABLE supplies the

output buffers of the cable side only and is designed for 4.5-V to 5.5-V operation.