FEATURES

· Power-On Reset (POR) Prevents Printer

Errors When Printer Is Turned On, But No

Valid Signal Is at Pins A9–A13

· Operates From 3 V to 3.6 V

· 1.4-kW 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

· Ioff and Power-Up 3-State Support Hot

Insertion

· Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

· ESD Protection Exceeds JESD 22

– 4000-V Human-Body Model (A114-A)

– 350-V Machine Model (A115-A)

– 1500-V Charged-Device Model (C101)

DESCRIPTION/ORDERING INFORMATION

The SN74LVCZ161284A is designed for 3-V to 3.6-V

VCC operation. This device provides asynchronous

two-way communication between data buses. The

control-function implementation minimizes external

timing requirements.

is high and in the B-to-A direction when DIR is low. This device also has five drivers that drive the cable side and

four receivers. The SN74LVCZ161284A 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 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 peripheral logic out (PERI LOGIC OUT), all cable-side pins have

a 1.4-kW 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 3-V to 3.6-V operation. VCC CABLE supplies the inputs

and output buffers of the cable side only and is designed for 3-V to 3.6-V and for 4.7-V to 5.5-V operation. Even

when VCC CABLE is 3 V to 3.6 V, the cable-side I/O pins are 5-V tolerant.