Nexperia USA Inc. 74LVC161PW,112

Overview

74LVC161PW,112 from Nexperia is a synchronous presettable 4-bit binary counter with asynchronous master reset (MR), internal look-ahead carry, and dual count-enable inputs (CEP/CET) for cascading. It operates from 1.2 V to 3.6 V, supports 3.3 V/5 V mixed-voltage interfacing via overvoltage-tolerant inputs (up to 5.5 V), and delivers terminal count (TC) pulse width ≈ Q0 HIGH duration for reliable multi-stage counting in industrial control logic.

For engineers reviewing the 74LVC161PW,112 datasheet, 74LVC161PW,112 pinout, 74LVC161PW,112 application, or 74LVC161PW,112 equivalent, this device is selected for deterministic synchronous counting, parallel load capability under active-low PE, glitch-free TC propagation (typ. 3.6 ns at 3.3 V), Schmitt-trigger input noise immunity, and -40 °C to +125 °C operation in space-constrained TSSOP16 layouts.

Technical Context

This counter uses positive-edge-triggered D-type flip-flops clocked simultaneously on CP, enabling precise synchronous state updates without ripple delay. Its look-ahead carry architecture generates TC only when CET = HIGH and Q0–Q3 = HHHH, eliminating carry-chain propagation bottlenecks in multi-chip counters.

Parallel loading occurs synchronously on CP edge when PE = LOW, independent of CEP/CET states; MR = LOW forces Q0–Q3 = LOW asynchronously, overriding all clock and enable conditions. Inputs tolerate 5.5 V regardless of VCC (1.2–3.6 V), enabling direct interface between 3.3 V logic and legacy 5 V systems.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm pitch, 1.20 mm max height - optimized for high-density PCB layouts with thermal performance derating of 8.5 mW/K above 91 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC161PW,112, the 74LVC163PW,112 trades asynchronous reset for synchronous control-critical for metastability avoidance but limiting in fail-safe contexts-while SN74LV161APW extends voltage headroom at the cost of 1.2 V operation, making it incompatible with energy-harvesting or battery-depleted scenarios.

Availability

74LVC161PW,112 is available at Aetrix Electronics and suitable for industrial PLC timing modules, automotive body control units, test equipment pattern generators, and IoT edge node event counters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC161PW,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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The 74LVC161 belongs to Nexperia's LVC logic family-designed specifically for low-voltage, high-noise-immunity digital control in space-constrained, thermally demanding applications requiring robust mixed-voltage interfacing.

FAQ

What is the maximum clock frequency supported by the 74LVC161PW,112?

The 74LVC161PW,112 supports a maximum clock frequency of 120 MHz at VCC = 3.3 V and -40 °C to +125 °C ambient, verified by tpd ≤ 9.5 ns (CP to Qn) and fmax testing per JEDEC standards. At 1.2 V, maximum frequency drops to 100 MHz due to increased propagation delay.

Can the 74LVC161PW,112 interface directly with 5 V microcontrollers?

Yes-the 74LVC161PW,112 features overvoltage-tolerant inputs rated to 5.5 V, allowing direct connection to 5 V GPIOs without level shifters. Its outputs swing rail-to-rail (0 V to VCC), so a 3.3 V-powered device drives 3.3 V–compatible inputs; external pull-ups may be needed for 5 V logic thresholds.

How does the terminal count (TC) output behave during cascading?

TC goes HIGH for one clock cycle when CET = HIGH and Q0–Q3 = HHHH (15 decimal), then returns LOW on the next CP↑. This pulse matches Q0's HIGH duration and is designed to enable CEP/CET of the next cascaded counter, ensuring synchronized multi-stage counting without ripple-induced glitches.

Is the TSSOP16 package (SOT403-1) lead-free and RoHS compliant?

Yes-the 74LVC161PW,112 in TSSOP16 (SOT403-1) packaging is fully RoHS compliant and lead-free per Nexperia's standard product policy, with matte tin (Sn) termination and halogen-free molding compound meeting IEC 61249-2-21 requirements.