NXP Semiconductors 74HC377D,652

Overview

74HC377D,652 from Nexperia is an octal positive-edge-triggered D-type flip-flop with data enable (E), designed for synchronous data latching in digital logic systems. It operates across 2.0 V–6.0 V supply, delivers 8-bit parallel storage, supports -40 °C to +125 °C operation, and features CMOS-level inputs with 3.5 pF input capacitance - used in bus interface buffering and address/data register stages of microcontroller peripherals.

For engineers reviewing the 74HC377D,652 datasheet, 74HC377D,652 pinout, 74HC377D,652 application, or 74HC377D,652 equivalent, key selection criteria include data-enable-controlled edge-triggered capture timing, SO20 package thermal derating above 109 °C, propagation delay ≤32 ns at 4.5 V, and compatibility with 74HCT377 for TTL-level input interfacing.

Technical Context

This device implements eight independent D-type flip-flops sharing a common clock (CP) and a single active-low data enable (E). When E is LOW, each Qn output captures the corresponding Dn input on the LOW-to-HIGH CP transition, subject to set-up (min 12 ns at 4.5 V) and hold (min 3 ns) timing constraints.

Input clamping diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used. The SO20 (SOT163-1) package has 7.5 mm body width, 20 leads, and linear power dissipation derating of 12.3 mW/K above 109 °C.

Key Specifications

Pinout & Package

74HC377D,652 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with 74HCT377D,653, the 74HC377D,652 provides higher noise immunity and broader voltage flexibility; compared with SN74ACT377N, it trades speed for supply adaptability and lower power consumption at reduced VCC.

Availability

74HC377D,652 is available at Aetrix Electronics and suitable for industrial control systems, embedded microcontroller peripherals, and legacy digital instrumentation requiring stable component supply across extended temperature ranges.

Supply support for 74HC377D,652 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance, reliable logic, discrete, and MOSFET solutions with focus on efficiency and sustainability.

The 74HC377 belongs to Nexperia's 74HC logic family - engineered for low-power, high-noise-immunity digital interfacing in industrial, automotive (non-safety), and consumer applications.

FAQ

What is the minimum set-up time required for Dn inputs relative to the CP rising edge?

At VCC = 4.5 V, the minimum set-up time (tsu) is 12 ns. This ensures reliable sampling of Dn values before the LOW-to-HIGH clock transition. The value scales inversely with supply voltage: 60 ns at 2.0 V, 10 ns at 6.0 V. Input transitions must be stable for this duration prior to the clock edge to avoid metastability or incorrect latching.

Can 74HC377D,652 operate reliably with a 3.3 V supply?

Yes - the 74HC377D,652 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At 3.3 V, VIH is guaranteed ≥2.31 V and VIL ≤0.99 V, providing 0.66 V noise margin. Propagation delay increases to ~24 ns (typ), and fmax drops to ~45 MHz, both within typical embedded timing budgets.

Is there a reset or clear function on this device?

No - the 74HC377D,652 does not include asynchronous or synchronous reset/clear inputs. Its functional table shows only "load" and "no change" modes. To initialize outputs, apply known Dn values while asserting E = LOW and pulsing CP, or use external reset circuitry on upstream drivers.

How does the data enable (E) pin affect power consumption during idle periods?

When E = HIGH, the flip-flops retain their last state and dynamic switching current ceases - ICC drops to ≤160 μA (max) over temperature. No clock toggling occurs internally, so no additional dynamic power is drawn from CP activity. This enables low-power hold states in battery-operated or energy-sensitive systems without requiring clock gating.