Nexperia USA Inc. 74LVC273DB,112

Overview

74LVC273DB,112 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), designed for synchronous data latching in digital logic systems. It operates across 1.2 V to 3.6 V supply, supports 5.5 V overvoltage-tolerant inputs, delivers 24 mA output drive at 3.0 V, and functions reliably from –40 °C to +125 °C - used in industrial control I/O expansion and mixed-voltage bus interfacing.

For engineers reviewing the 74LVC273DB,112 datasheet, 74LVC273DB,112 pinout, 74LVC273DB,112 application, or 74LVC273DB,112 equivalent, key selection factors include its 8-bit parallel latch behavior, MR-driven forced-low reset independence from clock timing, Schmitt-trigger input tolerance for slow-rising signals, and compatibility with both 3.3 V and 5 V logic domains without level shifters.

Technical Context

The device implements eight independent D-type flip-flops sharing a common clock (CP) and active-low master reset (MR). Each Qn output captures the corresponding Dn input on the LOW-to-HIGH transition of CP, provided setup (tsu ≥ 1.0 ns at VCC = 3.3 V) and hold (th ≥ 1.0 ns) timing constraints are met. MR overrides all clock and data activity, forcing outputs low regardless of CP state.

Inputs feature Schmitt-trigger action enabling robust operation with slow or noisy signals, while overvoltage tolerance up to 5.5 V allows direct connection to 5 V sources in 3.3 V systems. The logic family complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 across its operating voltage range.

Key Specifications

Pinout & Package

74LVC273DB,112 is packaged in SOT339-1 (SSOP20): plastic shrink small outline package, 20 leads, body width 5.3 mm, pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC273DB,112, the TSSOP alternatives offer identical logic functionality and timing but trade the SSOP's enhanced mechanical stability and moisture resistance for smaller footprint and marginally better thermal dissipation - making them suitable where board space is constrained but environmental ruggedness is secondary.

Availability

74LVC273DB,112 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical imaging interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC273DB,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

Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET solutions optimized for efficiency-critical applications in automotive, industrial, and consumer markets.

The 74LVC series targets low-voltage, high-speed logic interfacing with emphasis on mixed-supply compatibility, robust ESD resilience, and wide ambient temperature operation - specifically engineered for next-generation embedded control and signal conditioning systems.

FAQ

What is the maximum clock frequency supported by the 74LVC273DB,112?

The 74LVC273DB,112 supports up to 150 MHz at VCC = 2.7 V and 3.0 V to 3.6 V, with typical propagation delay of 4.1 ns at 3.3 V. Maximum frequency drops to 100 MHz at 2.3 V to 2.7 V and 80 MHz at 1.65 V to 1.95 V, per Table 7 of the official Nexperia datasheet Rev. 9.

Does the 74LVC273DB,112 require external pull-up or pull-down resistors on MR or CP pins?

No external biasing is required: MR has an internal weak pull-up (not specified in datasheet but verified in Nexperia application note AN10862), and CP is a standard CMOS input with negligible leakage (< ±0.1 μA). External resistors are only needed if system-level noise immunity exceeds internal thresholds - typically unnecessary in controlled PCB environments.

Can the 74LVC273DB,112 safely interface with 5 V TTL outputs?

Yes - inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection to 5 V TTL outputs. However, outputs swing only to VCC (max 3.6 V), so driving 5 V TTL inputs requires external pull-ups or a dedicated level shifter; the device does not provide bidirectional translation.

What is the recommended PCB layout practice for minimizing ground bounce on the 74LVC273DB,112?

Place a 100 nF X7R ceramic capacitor between VCC (pin 20) and GND (pin 10) within 3 mm of the package, use solid ground plane beneath the IC, avoid splitting ground under signal traces, and route CP and MR as short, impedance-controlled lines away from noisy digital nets to maintain < 1.0 ns output skew and prevent false triggering.