NXP Semiconductors 74LV377DB,118

Overview

74LV377DB,118 from NXP Semiconductors (formerly Philips) is an octal positive-edge-triggered D-type flip-flop with active-low data enable, designed for low-voltage addressable register and data synchronization applications. It operates from 1.0 V to 3.6 V, delivers 77 MHz max clock frequency at VCC = 3.3 V, features 13 ns typical propagation delay (CP to Qn), and supports TTL-level inputs at VCC ≥ 2.7 V.

For engineers reviewing the 74LV377DB,118 datasheet, 74LV377DB,118 pinout, 74LV377DB,118 application, or 74LV377DB,118 equivalent, key selection criteria include low-voltage operation down to 1.0 V, guaranteed timing across –40°C to +125°C, edge-triggered synchronous loading with data enable control, and pin compatibility with 74HC/HCT377 for legacy system upgrades.

Technical Context

The 74LV377DB,118 implements eight independent D-type latches sharing a common clock (CP) and a single active-low data enable (E). All outputs update synchronously on the LOW-to-HIGH transition of CP when E is LOW; otherwise, outputs retain state regardless of CP transitions.

Its CMOS design ensures low ICC (≤160 µA at VCC = 3.6 V), input capacitance of 3.5 pF, and output drive capability matching standard logic loads (±6 mA at VCC = 3.0 V). The device meets IEC 134 absolute maximum ratings and supports industrial temperature range (–40°C to +125°C) in SSOP20 package.

Key Specifications

Pinout & Package

74LV377DB,118 is housed in a 20-lead plastic shrink small outline package (SSOP20), body width 5.3 mm, per SOT339-1 footprint. This surface-mount package supports automated assembly and offers improved thermal performance over DIP/SO variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LV377DB,118, the 74LV377D,118 offers identical functionality in a larger SO package suitable for prototyping, while SN74LV377APWR provides TI-sourced assurance but requires revalidation of propagation delays under actual load conditions.

Availability

74LV377DB,118 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics modules, and embedded microcontroller peripheral interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LV377DB,118 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic IC development.

The 74LV377DB,118 belongs to NXP's legacy LV (Low-Voltage) logic family, engineered specifically for robust, low-power digital interfacing in mixed-voltage systems where compatibility with both CMOS and TTL signaling is essential.

FAQ

What is the minimum supply voltage for reliable operation of the 74LV377DB,118?

The 74LV377DB,118 is fully functional down to VCC = 1.0 V, with DC characteristics guaranteed from VCC = 1.2 V to 3.6 V. At 1.0 V, input levels are defined as GND or VCC only, and timing parameters are not specified - use 1.2 V minimum for full specification compliance. The 74LV377DB,118 maintains correct logic behavior across this entire range without internal regulation or brown-out detection.

Is the 74LV377DB,118 pin-compatible with the 74HC377 and 74HCT377?

Yes, the 74LV377DB,118 is explicitly stated in its datasheet as pin and function compatible with 74HC377 and 74HCT377. All 20 pins - including E, CP, D0–D7, Q0–Q7, VCC, and GND - map identically. This allows direct replacement in existing layouts, though users must verify that the lower VCC range (1.0–3.6 V) and reduced output drive meet system requirements.

What is the maximum clock frequency supported by the 74LV377DB,118 at 2.5 V supply?

At VCC = 2.5 V, the 74LV377DB,118 supports a maximum clock frequency of 51 MHz (minimum value across –40°C to +85°C), based on AC characteristics table interpolation between 2.0 V (27 ns delay) and 2.7 V (20 ns delay). This enables reliable operation in 2.5 V FPGA I/O banks and low-voltage microcontroller peripherals without timing closure issues.

Does the 74LV377DB,118 require external pull-up resistors on its inputs?

No, the 74LV377DB,118 does not require external pull-ups on E or D inputs because it has CMOS inputs with negligible leakage (II ≤ 1.0 µA at VCC = 3.6 V). However, floating inputs must be avoided - unused D or E lines should be tied to VCC or GND. Pull-ups may be needed only if interfacing with open-drain sources or to enforce default logic states during power-up sequencing.

How does the data enable (E) pin affect timing behavior in the 74LV377DB,118?

The E pin in the 74LV377DB,118 must be stable for at least one setup time (13 ns min at VCC = 3.0–3.6 V) before the LOW-to-HIGH CP transition to ensure predictable loading. When E is HIGH, Q outputs retain their previous state regardless of CP activity - no hold-time violation occurs. This enables precise gating of register updates without adding external clock enable logic.