Nexperia USA Inc. 74AHC1G4215GWH

Overview

74AHC1G4215GWH from Nexperia is a 15-stage CMOS binary counter/divider with integrated crystal oscillator buffer, functioning as a 32768:1 frequency divider (2¹⁵) and supporting external crystal or clock input at X1. It operates from 2.0 V to 5.5 V, features overvoltage-tolerant inputs up to 5.5 V, and delivers Q output with propagation delay ≤88 ns (VCC = 3.0–3.6 V, CL = 50 pF). Used in low-power real-time clock (RTC) backup timing, battery-operated metering, and microcontroller wake-up signal generation.

For engineers reviewing the 74AHC1G4215GWH datasheet, 74AHC1G4215GWH pinout, 74AHC1G4215GWH application, or 74AHC1G4215GWH equivalent, key selection criteria include its 15-stage synchronous divide-by-32768 function, X1/X2 oscillator interface capability, TSSOP5 (SOT353-1) package footprint, -40 °C to +125 °C operating range, and voltage-level translation support via overvoltage-tolerant X1.

Technical Context

The device implements a chain of 15 edge-triggered D flip-flops, advancing on the negative-going transition of X1; each stage divides by two, yielding exact division by 32768 at Q. The X1–X2 path includes a single inverting stage configurable as either a crystal oscillator driver (with external R1/C1/C2) or an overvoltage-tolerant input buffer - when used as buffer, X2 must be left floating.

Its static and dynamic behavior is characterized across two temperature ranges (-40 °C to +85 °C and -40 °C to +125 °C), with VIH/VIL thresholds scaling with VCC, VOH/VOL specified at ±4 mA loads, and maximum input frequency reaching 125 MHz at VCC = 3.3 V and 100 MHz at VCC = 3.3 V/125 °C ambient.

Key Specifications

Pinout & Package

TSSOP5 plastic thin shrink small outline package (SOT353-1), 5-lead, body width 1.25 mm, pin 1 indicator located below marking code in lower-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 15-stage divider and oscillator applications.

Compared with 74LVC1G4215GW, the 74AHC1G4215GWH offers superior noise immunity and higher VIH at 2.0 V, making it more robust in noisy industrial environments; versus CD4060BE, it provides smaller footprint, guaranteed 15-stage division, and built-in overvoltage protection - critical for modern mixed-voltage embedded systems.

Availability

74AHC1G4215GWH is available at Aetrix Electronics and suitable for real-time clock backup timing, microcontroller wake-up signal generation, and energy meter pulse output scaling requiring stable component supply across extended temperature ranges.

Supply support for 74AHC1G4215GWH 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 leading Dutch semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74AHC1G series targets space-constrained, low-power applications needing robust performance across wide voltage and temperature ranges - specifically designed for timing, level translation, and signal conditioning in embedded control systems.

FAQ

Can the 74AHC1G4215GWH operate with a 32.768 kHz crystal without external transistors or amplifiers?

Yes. The X1–X2 inverter stage is designed for direct crystal connection: use R1 = 2.2 kΩ, C1 = 22–37 pF, and C2 = 100 pF as shown in Figure 7. No external active components are required - the device sustains oscillation autonomously within its specified load capacitance and drive level limits.

What happens if X2 is not left floating when using an external clock source at X1?

Connecting a load to X2 while using X1 as a buffered clock input creates unintended feedback that degrades signal integrity, increases propagation delay variation, and may cause oscillation or metastability. The datasheet explicitly requires X2 to remain unconnected (floating) in buffer mode to prevent loading the internal inverter stage.

Is the 74AHC1G4215GWH suitable for automotive applications?

No. Although rated from -40 °C to +125 °C, this device is not AEC-Q200 qualified and lacks automotive-specific reliability testing, failure rate reporting, or PPAP documentation. Nexperia explicitly states non-automotive qualification in Section 16; use only in non-safety-critical auxiliary systems with customer-assumed risk.

How does the overvoltage tolerance on X1 affect system-level ESD protection design?

The 5.5 V overvoltage tolerance applies only to DC/low-frequency conditions and does not replace system-level ESD protection. While HBM >2000 V and CDM >1000 V are built-in, external TVS diodes are still required on board-level interfaces exposed to IEC 61000-4-2 events (e.g., USB, buttons), as the device's ESD rating does not cover fast transient coupling paths.