74HC77FPEL-E

Latches Overview

The 74HC77FPEL-E is a 4-bit bistable latch from the Renesas 74HC series, housed in a 14-pin SOP package. It functions as temporary storage for binary information between processing units and I/O or indicator units. Data at the D input transfers to the Q output when the enable (G) signal is high. The device retains the last data state when the enable goes low. Key electrical characteristics include a typical propagation delay of 12 ns with a 50 pF load, a fanout capability of 10 LSTTL loads, and a wide operating voltage range of 2 V to 6 V. Maximum input current is 1 µA, and static quiescent supply current is 2 µA max at 25°C.

Latches Feature Summary

• High-speed operation with typical propagation delay of 12 ns under standard loading conditions
• Wide operating voltage range supporting 2 V to 6 V power supplies
• Low input current and low quiescent supply current for efficient power consumption
• Capable of driving 10 LSTTL loads due to high output current capability

Latches Applications

• Temporary storage of binary information between processing units
• Data latching for input/output interface circuits
• Indicator unit control logic

Latches Procurement Notes

Verify the specific suffix 'FPEL' corresponds to the SOP-14 JEDEC package variant when sourcing. Confirm RoHS status and environmental compliance requirements against project specifications, as documentation indicates varying statuses for this part number across different distributors. Ensure the supplier provides official datasheets matching the HD74HC77 family specifications to guarantee functional equivalence.

Latches Selection Notes

Select this component for applications requiring 4-bit data retention with high-speed performance within a 2 V to 6 V supply range. The SOP-14 package is suitable for surface-mount assembly. Consider the 12 ns propagation delay and 10 LSTTL fanout when designing timing-critical interfaces. Verify that the low input current and quiescent supply current meet system power constraints compared to alternative logic families.

Latches Part Context

This part belongs to the Renesas 74HC series, which represents a standard family of 5V drive bipolar general-purpose logic ICs. The 74HC77 specifically implements a 4-bit D-type latch architecture. The series has an established market presence and offers upward compatibility with other members of the 74HC family, ensuring design flexibility for engineers utilizing standard logic components.

Latches Replacement Considerations

The HD74HC77P is a documented pin-compatible alternative within the same manufacturer's portfolio, offering the same 4-bit latch functionality in a DIP-14 package. Designers should verify package dimensions and mounting requirements when substituting between SOP and DIP variants.