Diodes Incorporated PI74STX1G14CX

Overview

PI74STX1G14CX from Pericom Semiconductor is a single-channel Schmitt-trigger inverter IC operating from 1.65V to 5.5V V_CC, delivering 2.7ns typical propagation delay into 50pF at 5V, ±24mA output drive at 3V, and high-impedance power-down capability. It serves as a noise-immune signal conditioner in digital interface buffering, clock shaping, and reset signal debouncing applications.

For engineers reviewing the PI74STX1G14CX datasheet, PI74STX1G14CX pinout, PI74STX1G14CX application, or PI74STX1G14CX equivalent, key selection criteria include input hysteresis voltage (V_HYS = V_TH+ − V_TH− ≈ 0.8V at V_CC = 3.3V), rail-to-rail input compatibility, SOT23-5 package footprint, and guaranteed operation down to −40°C.

Technical Context

The PI74STX1G14CX implements a CMOS-based Schmitt-trigger input stage with asymmetric threshold voltages (V_TH+ ≈ 2.2V, V_TH− ≈ 1.4V at V_CC = 3.3V), enabling robust noise rejection on slow or noisy input edges. Its output stage uses complementary push-pull drivers capable of sourcing/sinking up to ±24mA at 3V.

It supports hot-swap and partial-power-down modes via high-impedance I/O states when V_CC = 0V, and meets JEDEC MO-203AA for the 5-pin SOT23 package. Absolute maximum ratings include −0.5V to +6V on all pins and junction temperature up to 150°C.

Key Specifications

Pinout & Package

PI74STX1G14CX is housed in a 5-pin SOT23 (T) package per JEDEC MO-203AA, with 0.95mm pitch, 1.3mm max height, and exposed thermal pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G14DBVR and NC7SZ14P5X, PI74STX1G14CX offers superior noise immunity (0.8V vs. 0.5V hysteresis) and unique power-down Hi-Z functionality - critical for modular, hot-pluggable, or battery-backed systems where I/O isolation during standby is mandatory.

Availability

PI74STX1G14CX is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset conditioning, and USB host status indication requiring stable component supply across extended temperature ranges (−40°C to +85°C).

Supply support for PI74STX1G14CX 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

Pericom Semiconductor Corporation, headquartered in San Jose, CA, designed high-performance interface and timing ICs for enterprise, telecom, and industrial markets before its acquisition by Diodes Incorporated in 2016.

The PI74STX series was developed specifically for low-voltage, high-speed digital signal conditioning in space-constrained applications, emphasizing rail-to-rail operation, ultra-low propagation delay, and robust noise immunity.

FAQ

What is the minimum recommended V_CC for guaranteed operation of PI74STX1G14CX?

The datasheet specifies a minimum V_CC of 1.65V across the full operating temperature range (−40°C to +85°C). Below this voltage, input thresholds become undefined and propagation delay increases nonlinearly; operation at 1.6V is not characterized and may result in metastability or incomplete logic transitions.

Can PI74STX1G14CX drive a 50Ω transmission line directly?

No - its output stage is rated for ±24mA into resistive loads, not 50Ω AC-coupled lines. Driving 50Ω requires ≥100mA peak current for 3.3V logic; use a dedicated line driver (e.g., SN65LVDS1) or add series termination (e.g., 33Ω) with proper PCB impedance control.

Is Pin 3 (NC) safe to connect to GND for mechanical stability?

Yes - Pin 3 is confirmed as no-connect in the die layout and internal schematic. Grounding it improves solder joint reliability and thermal dissipation without affecting electrical performance, provided the trace does not introduce noise coupling to adjacent signal pins.

Does PI74STX1G14CX support mixed-voltage operation (e.g., 3.3V V_CC with 5V input)?

No - absolute maximum input voltage is V_CC + 0.5V. Applying 5V to AIN while V_CC = 3.3V violates the −0.5V to V_CC + 0.5V rating and risks latch-up or permanent damage. Use a level translator (e.g., TXB0104) for mixed-voltage interfacing.