Nexperia USA Inc. 74LVC163D,112

Overview

74LVC163D,112 from Nexperia is a synchronous presettable 4-bit binary counter with internal look-ahead carry, positive-edge-triggered clock (CP), synchronous master reset (MR), and dual count-enable inputs (CEP/CET) for high-speed cascading. It operates from 1.2 V to 3.6 V, supports 5.5 V-tolerant inputs, and delivers up to 150 MHz maximum frequency at 3.6 V in industrial temperature range (−40 °C to +125 °C). Used in digital timing control, address generation, and programmable logic state machines.

For engineers reviewing the 74LVC163D,112 datasheet, 74LVC163D,112 pinout, 74LVC163D,112 application, or 74LVC163D,112 equivalent, this device is selected for synchronous counting with deterministic reset behavior, low-voltage compatibility in mixed-supply systems, and direct TTL-level interfacing without level shifters.

Technical Context

The 74LVC163D implements four edge-triggered D-type flip-flops with synchronous parallel load and synchronous reset, enabling precise control of count sequence initiation and termination. Its look-ahead carry output (TC) asserts HIGH only when CET = HIGH and Q0–Q3 = HHHH, supporting clean multi-stage ripple-free cascading.

Count enable logic requires both CEP and CET HIGH to advance; CET directly gates TC, while CEP enables internal counting action. The MR input forces all Q outputs LOW on the next CP rising edge-regardless of PE, CEP, or CET states-ensuring deterministic initialization without race conditions.

Key Specifications

Pinout & Package

74LVC163D,112 uses SO16 (SOT109-1) package: plastic small outline, 16 leads, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous 4-bit binary counter applications.

Compared with SN74LVC163APWR and 74LVCH163PW,118, the 74LVC163D,112 offers proven SO16 manufacturability, wider lead spacing for manual rework, and lower cost in medium-volume industrial production-without sacrificing timing or voltage performance.

Availability

74LVC163D,112 is available at Aetrix Electronics and suitable for industrial PLC timing modules, automotive body control units, test equipment pattern generators, and medical infusion pump controllers requiring stable component supply across extended temperature ranges.

Supply support for 74LVC163D,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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC163D belongs to Nexperia's LVC logic family-designed for low-voltage, high-speed, mixed-supply system interfacing with robust ESD tolerance and wide operating temperature coverage.

FAQ

Can 74LVC163D,112 operate reliably at 1.2 V supply?

Yes. The device is fully specified down to 1.2 V per JEDEC JESD8-7A, with guaranteed timing (fmax ≥ 50 MHz), VIH/VIL thresholds, and output drive strength. At 1.2 V, propagation delay increases to 18 ns (CP to Qn), but all functional modes-including synchronous preset and reset-remain operational across −40 °C to +125 °C.

What is the exact behavior of TC output during cascading?

TC goes HIGH for one clock cycle only when CET = HIGH and Q0–Q3 = 1111. Its pulse width equals tPHL(CP→Q0), typically 3.8 ns at 3.3 V. This precise, edge-aligned pulse directly enables the CEP input of the next cascaded 74LVC163, eliminating ripple delay and ensuring deterministic multi-stage counting.

How does synchronous reset differ from asynchronous reset in practice?

Synchronous reset (MR) takes effect only on the next CP rising edge, regardless of when MR is asserted. This prevents metastability in clock domain crossings and ensures all four Q outputs change simultaneously. Asynchronous reset would cause unpredictable intermediate states if MR deasserts mid-cycle-making synchronous reset essential for deterministic state machine design.

Is external pull-up required on PE or MR pins?

No. Both PE and MR are active-LOW inputs with CMOS-compatible thresholds and no internal pull-up. In static designs where these signals are driven by open-drain or FPGA GPIO, external pull-ups (e.g., 10 kΩ to VCC) are required to hold them HIGH during normal counting. Floating inputs will cause undefined behavior per datasheet Table 3.