Nexperia USA Inc. 74HC6323AD,118

Overview

74HC6323AD,118 from Nexperia is a programmable 3-stage ripple counter with integrated crystal oscillator and 3-state output buffer, designed for frequency division (÷1/÷2/÷4/÷8), third-overtone crystal operation up to 50 MHz at 5 V, and asynchronous master reset control. It integrates two 7 pF on-chip load capacitors and operates across -40 °C to +125 °C in SO8 package.

For engineers reviewing the 74HC6323AD,118 datasheet, 74HC6323AD,118 pinout, 74HC6323AD,118 application, or 74HC6323AD,118 equivalent, this device serves as a compact CIO (Compact Integrated Oscillator) solution requiring precise clock division, low-component-count crystal interface, and robust 3-state timing control in industrial timers and control counters.

Technical Context

The device implements a negative-edge-triggered 3-bit binary ripple counter driven by X1, with S1/S2 inputs selecting division ratio (1, 2, 4, or 8). The on-chip Pierce oscillator supports fundamental or third-overtone crystal modes - internal 7 pF capacitors per X1/X2 pin enable third-overtone operation without external caps.

MR asserts asynchronously to reset the counter, halt oscillation, and force OUT into high-impedance state; MR features an internal pull-up, allowing floating operation. X1 accepts either crystal-derived or external CMOS/TTL clock signals (with pull-up for TTL), while X2 must float when external clock is applied.

Key Specifications

Pinout & Package

Package: SO8 plastic small outline (SOT96-1), 8-lead, 3.9 mm body width, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable oscillator-counter applications.

Compared with 74HCT6323AD,118, the 74HC6323AD,118 provides broader supply flexibility (2–6 V vs. 4.5–5.5 V) and CMOS input thresholds, while CD74HC4060M96 trades programmability and 3-state capability for deeper division depth and oscillator integration without select pins.

Availability

74HC6323AD,118 is available at Aetrix Electronics and suitable for industrial timers, control counters, and frequency dividers requiring stable component supply, extended temperature operation, and compact oscillator-integrated timing solutions.

Supply support for 74HC6323AD,118 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 optimized for efficiency, reliability, and miniaturization in industrial and automotive applications.

The 74HC6323A series belongs to Nexperia's HC logic family, engineered to deliver integrated oscillator+counter functionality for space- and cost-sensitive timing applications where discrete crystal oscillators and dividers would increase complexity.

FAQ

Can the 74HC6323AD,118 operate with a 1 MHz fundamental-mode crystal?

Yes - the device supports fundamental-mode crystals from 1 MHz to 25 MHz. Figure 9 in the datasheet shows a typical circuit using R_bias = 100 kΩ to 1 MΩ and load capacitors C1/C2 = 22–37 pF. The internal 7 pF caps contribute to total load, so external C1/C2 values should be selected to achieve the crystal's specified load capacitance (e.g., 12 pF).

What happens to the oscillator when MR is asserted LOW?

When MR is pulled LOW, the internal oscillator stops immediately, the ripple counter resets to zero, and the OUT pin enters high-impedance (3-state) mode. The oscillator remains disabled until MR returns HIGH; no restart delay or re-stabilization time is required upon release.

Is an external crystal required, or can I drive X1 with an external clock?

X1 accepts either a quartz crystal (with X2) or an external CMOS/TTL clock signal. When using an external clock, X2 must be left floating. The counter advances on the falling edge of X1, and MR retains full reset/3-state control regardless of clock source.

How does the device handle third-overtone crystal operation without external capacitors?

Two internal 7 pF capacitors - one connected to X1, one to X2 - combine with typical PCB stray capacitance (~5 pF per pin) to yield ~12 pF total load per terminal. This matches common third-overtone crystals (e.g., 50 MHz), eliminating need for external load caps as shown in Figure 10.