Nexperia USA Inc. 74LVC163BQ,115

Overview

74LVC163BQ,115 from Nexperia is a synchronous presettable 4-bit binary counter with internal look-ahead carry, synchronous reset (MR), parallel load (PE), and terminal count (TC) output. It operates from 1.2 V to 3.6 V, supports 5.5 V-tolerant inputs, and delivers up to 150 MHz max clock frequency at 3.3 V in industrial temperature range (−40 °C to +125 °C). Used in digital timing control, address generation, and cascaded counting systems.

For engineers reviewing the 74LVC163BQ,115 datasheet, 74LVC163BQ,115 pinout, 74LVC163BQ,115 application, or 74LVC163BQ,115 equivalent, this device is selected for high-speed synchronous counting where deterministic reset timing, low-voltage operation, and inter-stage carry propagation via TC are required - especially in space-constrained PCBs leveraging its DHVQFN16 package.

Technical Context

The 74LVC163BQ implements four edge-triggered D-type flip-flops with synchronous clocking on the rising edge of CP. All state changes - counting, presetting, and resetting - occur only on the positive-going transition of CP, eliminating race conditions inherent in asynchronous designs.

Its dual count-enable architecture (CEP and CET) enables clean n-bit cascading: CET feeds forward to enable TC, which pulses HIGH for one CP cycle when Q0–Q3 = 1111 and CET = HIGH. The internal look-ahead carry reduces propagation delay in multi-stage configurations versus ripple-carry counters.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, 16-terminal no-lead quad flat design with exposed thermal pad (non-soldered by default); optimized for thermal performance and board area reduction in dense layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV163APWRE4 and 74AHC163PW,118, the 74LVC163BQ,115 uniquely balances ultra-low-voltage operation (1.2 V), 5.5 V input tolerance, and −40 °C to +125 °C qualification - making it optimal for mixed-supply embedded systems where voltage scalability and robustness coexist.

Availability

74LVC163BQ,115 is available at Aetrix Electronics and suitable for motor control sequencing, industrial PLC timer modules, serial data framing logic, and LED display multiplexing requiring stable component supply across automotive and industrial temperature grades.

Supply support for 74LVC163BQ,115 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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The 74LVC163BQ belongs to Nexperia's LVC logic family - engineered for low-power, wide-VCC operation and robust noise immunity in space-constrained, thermally demanding applications.

FAQ

What is the minimum setup time for D0–D3 relative to CP at 3.3 V?

At VCC = 3.3 V, the minimum setup time (tsu) for D0–D3 relative to the rising edge of CP is 2.5 ns, as specified in Table 7 of the datasheet. This ensures reliable data capture during parallel load operations when PE is asserted LOW. Violating this timing may result in metastable or incorrect Q-output states.

Can the 74LVC163BQ,115 drive a 50 pF load at 100 MHz?

Yes - at VCC = 3.3 V and Tamb = 25 °C, the 74LVC163BQ,115 maintains valid VOH/VOL levels driving 50 pF loads up to 120 MHz (min fmax over temperature), per Table 7. Its typical tpd of 3.8 ns supports clean signal integrity under these conditions, assuming proper PCB layout and decoupling.

Is the exposed thermal pad on the DHVQFN16 package electrically connected?

No - the exposed pad (terminal 1 index area) is not electrically connected to any internal node. Per datasheet Section 5.1, it has no electrical or mechanical requirement to be soldered; if connected, it must remain floating or tied to GND to avoid unintended coupling or thermal stress.

How does the synchronous reset differ from asynchronous reset in practical use?

The MR input performs synchronous reset: Q0–Q3 clear to 0000 only on the next rising edge of CP, regardless of MR assertion timing. This prevents partial-state glitches during clock domain crossing and ensures deterministic behavior in pipelined systems - unlike asynchronous resets that can violate hold-time constraints and cause metastability.