74LVCE161284DLRG4

Specialty Logic Overview

The SN74LVCE161284 is a 19-bit IEEE Std 1284 translation transceiver designed for asynchronous two-way communication between data buses. It operates with VCC at 3V to 3.6V and VCC CABLE at 3V to 5.5V, providing 5-V tolerance on cable-side I/O pins. The device features an auto-power-up function that prevents printer errors during power-on by keeping Y outputs high until A inputs go high. It includes integrated 1.4-kΩ pullup resistors on open-drain outputs and supports hot insertion via Ioff and power-up 3-state capabilities.

Specialty Logic Feature Summary

• Auto-Power-Up Feature: Prevents printer errors when the printer is turned on but no valid signal is present at A9–A13 pins.
• Integrated Pullup Resistors: Includes 1.4-kΩ pullup resistors on all open-drain outputs to eliminate the need for discrete resistors.
• IEEE Std 1284 Compliance: Designed for Level-1 Type (IEEE Std 1284-I) and Level-2 Type (IEEE Std 1284-II) electrical specifications.
• Hot Insertion Support: Provides Ioff and Power-Up 3-State support for safe connection while powered.

Specialty Logic Applications

• Parallel peripheral interface systems compliant with IEEE Std 1284
• Printer systems requiring error-free power-up sequences
• Voltage translation between 3-V and 5-V logic domains

Specialty Logic Procurement Notes

Verify the specific package variant required for your design, as the DL suffix denotes SSOP and DGG denotes TSSOP. Confirm voltage requirements match the 3V to 3.6V VCC range and up to 5.5V VCC CABLE. Ensure ESD protection ratings meet system standards, specifically ±4 kV HBM and ±15 kV air-gap discharge. Check RoHS compliance status if environmental regulations apply to your manufacturing process.

Specialty Logic Selection Notes

Select this component when designing interfaces that require strict adherence to IEEE Std 1284 electrical specifications. It is suitable for applications needing voltage translation between 3-V and 5-V systems without external pullup components. Consider the auto-power-up feature if preventing initial state errors in peripheral devices is critical. Evaluate thermal performance based on the selected package type, as thermal impedance varies between SSOP and TSSOP options.

Specialty Logic Part Context

This device belongs to Texas Instruments' specialized logic family focused on parallel interface solutions. It addresses the specific needs of IEEE Std 1284-compliant systems by integrating control functions and voltage translation into a single 48-pin package. The flow-through architecture optimizes PCB layout for high-density designs.

Specialty Logic Replacement Considerations

SN74LVCE161284DLR (SSOP package)

Specialty Logic FAQ

How does the auto-power-up feature prevent printer errors?

The active input detection circuit forces Y9–Y13 outputs to the high state after power-on. These outputs remain high until one of the associated A9–A13 inputs goes high, preventing deassertion of the BUSY signal in the cable at power-on.

What is the purpose of the HD control pin?

The HD pin determines the output drive mode. When HD is high, outputs are in a totem-pole configuration; when HD is low, they operate in an open-drain configuration, meeting different IEEE Std 1284 drive requirements.