SN74ALVCH162373DL

Overview

The SN74ALVCH162373DL is a 16-bit transparent D-type latch with 3-state outputs from the Texas Instruments Widebus family. It operates at supply voltages between 1.65 V and 3.6 V. The device contains two independent 8-bit latches, each featuring a latch-enable (LE) input and a buffered output-enable (OE) input. Outputs are designed to sink up to 12 mA and include equivalent 26-Ω series resistors to reduce overshoot and undershoot. Propagation delay ranges from 1 ns to 6.3 ns depending on voltage. It features active bus-hold circuitry on data inputs.

Feature Summary

• Active bus-hold circuitry maintains valid logic states on unused or undriven data inputs without requiring external pullup or pulldown resistors.
• Outputs incorporate equivalent 26-Ω series resistors to minimize signal overshoot and undershoot, eliminating the need for external damping components.
• High-impedance state capability allows driving bus lines without interface or pullup components while retaining internal data integrity.

Applications

• Implementing buffer registers in digital systems
• Configuring I/O ports for data handling
• Serving as bidirectional bus drivers
• Functioning as working registers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and shipping configuration. The DL suffix indicates an SSOP tube package. Confirm RoHS compliance status and moisture sensitivity level ratings prior to assembly planning. Ensure the selected variant matches the required lead finish and operating temperature range specifications.

Selection Notes

Select this component when designing systems requiring 16-bit data storage with high-speed transparent latching capabilities. The ALVCH series supports low-voltage operation down to 1.65 V, making it suitable for modern low-power applications. Consider the integrated bus-hold feature if minimizing external passive components is a priority. Verify that the 3-state output drive strength meets the load requirements of the target bus architecture.

Part Context

This device belongs to the Texas Instruments Widebus family, which provides high-density logic solutions. The SN74ALVCH162373 is part of the ALVCH logic series, characterized by advanced low-voltage CMOS technology. It serves as a foundational building block for complex digital interfaces where reliable data retention and fast switching speeds are critical.

Replacement Considerations

The SN74ALVCH162373GR is a functional alternative available in a TSSOP package. Both devices share identical electrical characteristics and pinouts within the same logic family. Verify package dimensions and thermal performance differences when substituting between SSOP and TSSOP formats.

FAQ

How does the device handle unused data inputs?

The SN74ALVCH162373DL utilizes active bus-hold circuitry on its data inputs. This feature automatically holds unused or undriven inputs at a valid logic state, removing the necessity for external pullup or pulldown resistors.

What is the function of the OE input?

The buffered output-enable (OE) input controls the state of the eight outputs. When activated, it places the outputs into a high-impedance state, preventing them from loading or driving the bus lines significantly. This state does not affect the internal latching operations.

Can the outputs drive bus lines directly?

Yes, the outputs are designed to sink up to 12 mA and include equivalent 26-Ω series resistors. This design allows the device to drive bus lines effectively without requiring additional interface or pullup components.