Nexperia USA Inc. 74HC6323AD,112

Overview

74HC6323AD,112 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 VCC = 5 V ±10%, and precise timing control in compact SO8 packaging. It features on-chip 7 pF capacitors per oscillator pin, asynchronous master reset (MR), and CMOS-level inputs.

For engineers reviewing the 74HC6323AD,112 datasheet, 74HC6323AD,112 pinout, 74HC6323AD,112 application, or 74HC6323AD,112 equivalent, this device serves as a self-contained clock generator and divider for embedded timers, control counters, and time-delay circuits where board space, external component count, and temperature-stable overtone oscillation are critical.

Technical Context

The device integrates a Pierce-type oscillator configurable for fundamental or third-overtone crystal modes, with internal 7 pF load capacitors enabling third-overtone operation without external caps. Its 3-stage binary ripple counter advances on the negative-going edge of X1 and supports four division ratios via S1/S2 select inputs.

MR provides asynchronous reset, halting oscillation and forcing OUT into high-impedance state; MR has an internal pull-up, allowing floating operation. The 3-state output buffer supports bus sharing, and X1 accepts either crystal drive or external TTL/CMOS clocks (with pull-up for TTL).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT6323AD,112 and CD74HC4060M96, the 74HC6323AD,112 uniquely combines programmable division, third-overtone crystal support without external caps, and 3-state output in one SO8 device-enabling compact, high-accuracy timing where flexibility and integration are prioritized over raw division depth or TTL compatibility.

Availability

74HC6323AD,112 is available at Aetrix Electronics and suitable for control counters, timer circuits, and frequency dividers requiring stable component supply, extended temperature operation, and minimal external timing components.

Supply support for 74HC6323AD,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, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and consumer applications.

The 74HC6323A belongs to Nexperia's HC logic family, engineered for low-power, wide-supply-operation timing functions-specifically targeting integrated oscillator+counter applications where board space, BOM reduction, and overtone crystal stability are design priorities.

FAQ

Can the 74HC6323AD,112 operate with a fundamental-mode crystal?

Yes-it supports both fundamental and third-overtone crystal modes. For fundamental operation (1–25 MHz), external load capacitors C1/C2 (22–37 pF) and bias resistor Rbias (100 kΩ–10 MΩ) are required per Figure 9. The internal 7 pF caps alone are insufficient for stable fundamental oscillation but are optimized for third-overtone use.

What happens if S1 and S2 pins are left unconnected?

When S1 and S2 are floating, the internal pull-up behavior defaults the counter to divide-by-8 mode. This is a defined operational state-not undefined logic-and is explicitly documented in the General Description section of the datasheet.

Is an external clock allowed at X1, and what are the requirements?

Yes-X1 accepts external CMOS or TTL clocks. For TTL, a pull-up resistor to VCC is required. Input transition times must be ≤6 ns (tr/tf), voltage swing must be GND to VCC, and MR must be HIGH. Maximum input frequency is 100 MHz at VCC = 6.0 V with CL = 15 pF.

How does the MR pin behave during power-up?

MR has an internal pull-up resistor (~100 µA typical at VCC = 6 V), holding it HIGH during power ramp-up. This ensures oscillator start and counter operation without external reset circuitry-unless a synchronized power-on reset is required, in which case an external RC or supervisor IC should drive MR.