NXP Semiconductors 74ABT377ADB,112

Overview

74ABT377ADB,112 from NXP Semiconductors (formerly Philips) is an octal positive-edge-triggered D-type flip-flop with active-low enable, designed for addressable register and data synchronization functions in 5V TTL-compatible digital systems. It features 8-bit parallel data storage, 150 MHz maximum clock frequency, ±32 mA/±64 mA output drive, and operates across –40°C to +85°C.

For engineers reviewing the 74ABT377ADB,112 datasheet, 74ABT377ADB,112 pinout, 74ABT377ADB,112 application, or 74ABT377ADB,112 equivalent, key selection criteria include edge-triggered register timing, enable-controlled synchronous loading, high-output-drive capability, and TSSOP-20 packaging for space-constrained logic designs.

Technical Context

The 74ABT377ADB,112 implements eight independent D-type flip-flops sharing a common rising-edge clock (CP) and a single active-low enable (E). All Q outputs update simultaneously on the Low-to-High CP transition when E is low, with setup/hold times of 1.5 ns and 1.0 ns respectively at 25°C.

It uses BiCMOS technology to achieve low static current (250 µA max ICCL), fast propagation delays (3.1–3.6 ns CP→Qn), and robust latch-up immunity (>500 mA per JEDEC JC40.2). Power-up reset ensures Q outputs initialize low upon VCC ramp.

Key Specifications

Pinout & Package

74ABT377ADB,112 is supplied in a 20-pin plastic TSSOP (Thin Shrink Small Outline Package), Type I, body width 4.4 mm (SOT360-1), lead pitch 0.65 mm, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT377ADW and 74LVX377M, the 74ABT377ADB,112 uniquely delivers 5V-compatible high-speed register functionality in a compact TSSOP-20 package with guaranteed power-up reset - making it optimal for space-constrained, mixed-signal embedded controllers requiring deterministic boot behavior.

Availability

74ABT377ADB,112 is available at Aetrix Electronics and suitable for industrial control panels, legacy bus interface modules, and microprocessor-based instrumentation requiring stable component supply, long-term lifecycle support, and verified 5V TTL compatibility.

Supply support for 74ABT377ADB,112 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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions and high-performance analog/mixed-signal ICs.

The 74ABT series was developed by Philips to deliver high-speed, high-drive TTL-compatible logic with BiCMOS efficiency - specifically targeting industrial, telecom, and computing applications needing robust 5V register and bus interface functions.

FAQ

What is the supply voltage requirement for the 74ABT377ADB,112?

The 74ABT377ADB,112 operates strictly within a 4.5 V to 5.5 V DC supply range. It is not 3.3 V tolerant - applying voltages outside this window risks functional failure or permanent damage. The device draws ≤250 µA quiescent current at 5.5 V with outputs high, and up to 30 mA when outputs are low.

Does the 74ABT377ADB,112 have built-in power-up reset functionality?

Yes, the 74ABT377ADB,112 includes hardware power-up reset: all Q0–Q7 outputs initialize to logic low upon VCC ramp, regardless of D-input states or clock activity. This behavior is specified in the DC Electrical Characteristics table as VRST ≤ 0.55 V at IO = 1 mA, eliminating need for external reset circuitry in most applications.

Is the 74ABT377ADB,112 pin-compatible with other 74ABT377 variants?

Yes - the 74ABT377ADB,112 shares identical pinout and logic function with all 74ABT377A variants (e.g., DIP, SOIC, SSOP), including same pin numbering, terminal assignments, and electrical timing. Only the package type (TSSOP-20, SOT360-1) differs; no PCB redesign is needed when substituting within the same family.

What is the maximum clock frequency supported by the 74ABT377ADB,112 across its full temperature range?

The 74ABT377ADB,112 guarantees 150 MHz maximum clock frequency from –40°C to +85°C, as confirmed in the AC Characteristics table. At 25°C, typical operation reaches 250 MHz, but system-level timing must be validated using worst-case 150 MHz spec for production reliability.

How does the enable (E) input affect timing behavior in the 74ABT377ADB,112?

The E input must be stable for ≥1.5 ns before the CP rising edge (ts = 1.5 ns) and remain stable for ≥1.0 ns after (th = 1.0 ns) to ensure predictable operation. When E is high, Q outputs retain their last loaded value; when E is low, D inputs are transferred to Q on the next CP rising edge - enabling precise windowed data capture.