74VCX16841MTD

Latches Overview

The onsemi 74VCX16841MTD is a low voltage 20-bit transparent latch with 3.6V tolerant inputs and outputs, housed in a 56-lead Thin Shrink Small Outline Package (TSSOP). It operates within a supply voltage range of 1.4V to 3.6V and supports an operating temperature from -40°C to +85°C. The device features 3-STATE outputs controlled by Output Enable (OEn) and Latch Enable (LEn) signals. Propagation delay from data input to output is typically 0.8ns at 3.3V with a 30pF load. Static drive capability reaches ±24mA at 3.0V VCC.

Latches Feature Summary

• Contains twenty non-inverting latches with 3-STATE outputs designed for bus-oriented applications.
• Features 3.6V tolerant inputs and outputs compatible with low voltage (1.4V to 3.6V) VCC applications.
• Supports live insertion and withdrawal capabilities when configured correctly.
• Utilizes patented noise and EMI reduction circuitry for improved signal integrity.

Latches Applications

• Bus oriented applications requiring byte-controlled data storage
• Low voltage logic systems with 3.6V I/O compatibility
• Systems supporting live insertion and withdrawal operations

Latches Procurement Notes

Verify the specific package variant MTD56 corresponds to the 56-lead TSSOP configuration. Confirm that the ordering code matches the exact suffix requirements if tape and reel packaging is needed, which requires appending the letter X to the base part number. Ensure the procurement documentation references the correct datasheet revision DS500132 for accurate electrical specifications.

Latches Selection Notes

Select this component for designs requiring 20-bit parallel data latching with high-speed performance in low voltage environments. The 3.6V tolerance allows interfacing with higher voltage logic levels while maintaining low power consumption. Consider the 56-lead TSSOP footprint for space-constrained PCB layouts. Evaluate the static drive current requirements against the load capacitance to ensure signal integrity across the bus.

Latches Part Context

This device belongs to the VCX family of low voltage logic components, characterized by advanced CMOS technology for high speed and low power dissipation. It serves as a transparent latch solution, distinct from flip-flops, allowing data to pass through when enabled. The 74VCX series is engineered for applications demanding fast propagation delays and robust ESD protection exceeding 2000V human body model standards.

Latches Replacement Considerations

Check for direct substitutes within the same logic family or equivalent pin-compatible devices offering similar 20-bit latch functionality. Verify that any replacement maintains the 3.6V I/O tolerance and 1.4V to 3.6V operating voltage range. Ensure the alternative component supports the required 3-STATE output control and meets the necessary propagation delay specifications for the target application.

Latches FAQ

How does the device handle data during power-off conditions?

The 74VCX16841 features power-off high impedance inputs and outputs, preventing unwanted current flow or signal interference when the device is not powered.

What is the function of the Latch Enable (LEn) input?

When LEn is HIGH, the latches are transparent and data passes directly to the outputs. When LEn transitions LOW, the data present at the inputs is latched and stored until the next enable cycle.

How is the 3-STATE output state controlled?

The Output Enable (OEn) input controls the 3-STATE outputs. When OEn is LOW, the outputs are active in a 2-state mode. When OEn is HIGH, the outputs enter a high impedance state.