NXP Semiconductors 74LVT74D,112

Overview

74LVT74D,112 from NXP Semiconductors (formerly Philips) is a 3.3 V dual positive-edge-triggered D-type flip-flop with asynchronous active-low set (SD) and reset (RD), true/complementary outputs per channel, 3.1 ns typical t_PLH at V_CC = 3.3 V, and operation over –40°C to +85°C. It serves as a synchronous storage element in high-speed digital control logic, clock-domain synchronization, and state register design.

For engineers reviewing the 74LVT74D,112 datasheet, 74LVT74D,112 pinout, 74LVT74D,112 application, or 74LVT74D,112 equivalent, key selection criteria include its 14-pin SO package (SOT108-1), 150 MHz maximum clock frequency at V_CC = 3.3 V, asynchronous set/reset independence from clock, and LVT logic family compatibility with 3.3 V TTL-level interfaces.

Technical Context

The 74LVT74D,112 implements two independent D-type flip-flops sharing no internal resources-each has dedicated D, CP, SD, RD, Q, and Q̅ terminals. Clock triggering occurs on the low-to-high transition at a voltage threshold (~1.5 V), not edge rate-dependent, enabling robust timing across varying slew rates.

Asynchronous SD and RD inputs override clocked behavior and force Q/Q̅ to stable states (H/L or L/H) regardless of CP or D state. The device meets LVT family specifications: 2.7–3.6 V supply range, 32 mA I_OL, –20 mA I_OH, and input thresholds of V_IL ≤ 0.8 V and V_VIH ≥ 2.0 V.

Key Specifications

Pinout & Package

74LVT74D,112 is supplied in a 14-pin plastic small outline (SO) package per SOT108-1: 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC74APW and 74ALVC74D,118, the 74LVT74D,112 delivers optimal timing performance (3.1 ns t_PLH) and proven reliability in established 3.3 V industrial systems, while the ALVC variant provides power savings and the LVC variant adds voltage flexibility at the cost of pinout compatibility.

Availability

74LVT74D,112 is available at Aetrix Electronics and suitable for high-speed data capture, state machine control, and bus interface synchronization requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 74LVT74D,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, formerly Philips Semiconductors, is a global leader in high-performance analog and logic ICs, with core expertise in automotive, industrial, and communication semiconductor solutions.

The 74LVT74D,112 belongs to the LVT (Low-Voltage BiCMOS Technology) logic family-designed specifically for high-speed, low-noise 3.3 V digital systems requiring TTL-compatible drive and precise edge-triggered timing.

FAQ

What is the maximum operating frequency of the 74LVT74D,112?

The 74LVT74D,112 supports a maximum clock frequency of 150 MHz when operated at V_CC = 3.3 V and within the –40°C to +85°C temperature range. This value is specified under AC characteristics with CL = 50 pF and RL = 500 Ω, and reflects guaranteed performance across the full industrial temperature range-not just typical conditions.

Does the 74LVT74D,112 support 5 V input tolerance?

No, the 74LVT74D,112 does not support 5 V tolerant inputs. Its absolute maximum input voltage is +7.0 V, but recommended operating input voltage is limited to 0–5.5 V only when V_CC = 0 V (off-state). Under normal operation (V_CC = 2.7–3.6 V), VI must remain within 0–5.5 V, yet VIH is defined at ≥2.0 V and VIL ≤0.8 V-making it incompatible with standard 5 V TTL logic levels without external level translation.

What is the function of pins 5, 6, 8, and 9 on the 74LVT74D,112?

Pins 5 and 6 are Q0 and Q̅0 (true and complement outputs of flip-flop 0); pins 8 and 9 are Q1 and Q̅1 (true and complement outputs of flip-flop 1). These outputs provide simultaneous access to both logic states, enabling direct implementation of toggle functions, differential signaling, or redundant logic paths without external inverters-reducing propagation delay and board space.

Can the 74LVT74D,112 be used in place of the 74LV74?

No-the 74LVT74D,112 is not a drop-in replacement for the 74LV74. While both are dual D-type flip-flops, the 74LV74 uses LV (low-voltage CMOS) technology with different DC/AC specs: lower drive strength (I_OL = 12 mA), slower propagation (t_PLH ≈ 7.5 ns), and no guaranteed 150 MHz operation. Pinout is identical, but timing and drive capability differences require full circuit validation before substitution.

What decoupling is recommended for stable operation of the 74LVT74D,112?

A minimum 100 nF ceramic capacitor placed as close as possible to pin 14 (V_CC) and pin 7 (GND) is required for stable 74LVT74D,112 operation. For systems with multiple 74LVT74D,112 devices or high-frequency switching, add a 10 nF capacitor in parallel to suppress higher-frequency noise. Ground plane integrity and short, low-inductance traces are essential to maintain <100 mV supply ripple under dynamic load.