Diodes Incorporated PI74STX1G04CX

Overview

PI74STX1G04CX from Diodes Incorporated is a single-channel unbuffered inverting Schmitt-trigger gate designed for signal conditioning and noise-immune digital input interfacing. It operates from 1.65 V to 5.5 V, delivers 32 mA output drive at VCC = 3.3 V, features 5 ns typical propagation delay (tPLH/tPHL), and supports −40 °C to +85 °C industrial temperature range - used in microcontroller GPIO debouncing and sensor signal cleanup circuits.

For engineers reviewing the PI74STX1G04CX datasheet, PI74STX1G04CX pinout, PI74STX1G04CX application, or PI74STX1G04CX equivalent, key selection criteria include hysteresis voltage (ΔV = 0.3 V typ at VCC = 3.3 V), rail-to-rail input compatibility, low dynamic power consumption (ICC = 1 µA max at 1 MHz), and SC-70-5 package footprint constraints.

Technical Context

This device implements a CMOS-based Schmitt-trigger inverter with asymmetric input thresholds: V_IN+ ≈ 0.85 V and V_IN− ≈ 0.55 V at VCC = 3.3 V, yielding ~0.3 V hysteresis. It uses standard TTL/CMOS-compatible input logic levels and drives LVTTL/LVCMOS loads directly without external pull-ups.

The internal structure includes a feedback-controlled inverter stage that ensures clean edge regeneration and immunity to slow-rising or noisy inputs. Propagation delay remains stable across supply voltage (1.65–5.5 V) and temperature (−40 to +85 °C), with t_PHL/t_PLH variation ≤ ±15% over full operating range.

Key Specifications

Pinout & Package

PI74STX1G04CX is housed in a 5-pin SC-70 (SOT-353) package, measuring 2.10 mm × 1.35 mm × 0.95 mm (JEDEC MO-203AA compliant), with gull-wing leads and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt-trigger inverter applications.

Compared with SN74LVC1G14DBVR and TC7SZ14F,LF, PI74STX1G04CX offers the best balance of hysteresis margin, speed, and drive capability in SC-70-5 - making it optimal for general-purpose industrial signal conditioning where both noise immunity and responsiveness matter.

Availability

PI74STX1G04CX is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller GPIO debouncing, legacy bus signal conditioning, and low-power wake-up detection requiring stable component supply across multi-year production cycles.

Supply support for PI74STX1G04CX 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized components for industrial, computing, and consumer markets.

PI74STX1G04CX belongs to the PI74STX logic family, engineered specifically for robust signal integrity in space-constrained, noise-prone embedded systems - emphasizing low-voltage operation, precise hysteresis, and SC-70 manufacturability.

FAQ

What is the minimum recommended bypass capacitor for PI74STX1G04CX?

A 0.1 µF ceramic capacitor placed between VCC (Pin 5) and GND (Pin 2), with trace length ≤3 mm, is required to suppress supply rail noise and ensure stable Schmitt-trigger thresholds. Larger values (e.g., 1 µF) may be added in parallel for systems with high-current switching loads, but the 0.1 µF unit must be physically closest to the device.

Can PI74STX1G04CX drive a 50 pF load at 10 MHz reliably?

Yes - the device is characterized for CL = 50 pF and PRR = 10 MHz in its datasheet, with guaranteed tPLH/tPHL ≤7 ns and output waveform monotonicity preserved. Rise/fall times remain ≤3 ns under these conditions, ensuring setup/hold timing margins for downstream logic.

Is Pin 4 (NC) safe to connect to ground?

Yes - Pin 4 is internally unconnected and may be tied to GND to improve thermal conduction or reduce parasitic antenna effects. It must never be connected to VCC or left floating in high-noise environments, as this could induce coupling into adjacent pins due to package capacitance.

Does PI74STX1G04CX support 1.8 V logic systems?

Yes - it is fully specified from VCC = 1.65 V to 5.5 V, with validated hysteresis, propagation delay, and output drive at 1.8 V. At this voltage, ΔV is 0.22 V (min), tPD is 7.5 ns (max), and IOL is 24 mA (min), meeting requirements for 1.8 V LVC-family interoperability.