74V1G77CTR

Latches Overview

The STMicroelectronics 74V1G77CTR is a single D-type latch fabricated using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. Designed for portable applications, it operates within a voltage range of 2V to 5.5V. The device features high-speed performance with a typical propagation delay of 4.4ns at 5V supply. It incorporates low power dissipation characteristics, offering maximum quiescent current of 1µA at 25°C. High noise immunity is ensured with minimum input levels defined as 28% of VCC. Power-down protection on inputs allows acceptance of voltages from 0 to 7V regardless of the supply voltage, facilitating interfacing between 5V and 3V systems.

Latches Feature Summary

• Advanced CMOS technology providing high speed and low power consumption
• Power-down protection enabling safe interfacing across different voltage domains
• High noise immunity suitable for reliable operation in noisy environments
• Symmetrical output impedance ensuring balanced signal transmission

Latches Applications

• Portable electronic devices requiring low power logic storage
• Data buffering and temporary storage in digital circuits
• Level shifting interfaces between 5V and 3V logic systems
• Timing control circuits utilizing latch enable functionality

Latches Procurement Notes

Verify the package marking code 'CTR' corresponds to the SOT323-5L configuration when inspecting received components. Confirm that the ordering suffix matches the specific reel or tube packaging requirements for your assembly line. Ensure compatibility with standard surface mount reflow profiles specified for this small outline transistor package type during manufacturing integration.

Latches Selection Notes

Select this component when a compact single D-latch is required for space-constrained designs. It is appropriate for applications needing interface capabilities between 3V and 5V logic families without external level shifters. Consider its low static current consumption for battery-operated systems where minimizing quiescent power draw is critical for extended operational life.

Latches Part Context

This device belongs to the 74V series of high-speed CMOS logic gates manufactured by STMicroelectronics. The series utilizes sub-micron technology to achieve performance comparable to older 5V families while operating at lower voltages. The 74V1G77 specifically provides single latch functionality within a minimal footprint, fitting into the broader portfolio of general-purpose logic solutions designed for modern embedded systems.

Latches Replacement Considerations

Check pinout compatibility with existing SOT323-5L footprints before substituting. Verify that alternative single D-latches support the same 2V to 5.5V operating range and offer similar noise immunity specifications. Ensure any replacement maintains power-down protection features if interfacing mixed-voltage signals is required in the design.

Latches FAQ

How does the device handle input voltages during power-down?

The 74V1G77CTR includes power-down protection on its inputs, allowing them to accept voltages from 0 to 7V regardless of the supply voltage status.

What is the typical propagation delay at 5V supply?

At a supply voltage of 5V, the typical propagation delay (tPD) is 4.4 nanoseconds.

Can this latch be used to interface 5V logic with 3V logic?

Yes, the device is designed to interface 5V signals to 3V systems due to its wide operating voltage range and input protection features.