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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Diodes Incorporated PI74ST1G125TEX

Name: PI74ST1G125TEX
Brand: Diodes Incorporated
SKU: PI74ST1G125TEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI74ST1G125TEX

Manufacturer:: Diodes Incorporated

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: SC-74A, SOT-753

Datasheet:: PI74ST1G125TEX.pdf

Description:: IC BUF NON-INVERT 3.6V SOT23-5

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Product details

Overview

PI74ST1G125TEX from Pericom Semiconductor is a single-channel 3-state buffer IC operating from 1.8V to 3.6V V_CC, featuring 1.8ns typical propagation delay, ±24mA output drive at 3V, and SC70-5 package. It serves as a level-shifting, bus-isolation buffer in low-voltage digital signal routing applications such as mobile SoC interconnects and portable sensor interface subsystems.

For engineers reviewing the PI74ST1G125TEX datasheet, PI74ST1G125TEX pinout, PI74ST1G125TEX application, or PI74ST1G125TEX equivalent, key selection criteria include 3-state enable timing (t_PZH/t_PLZ ≤ 7.5ns), input voltage tolerance up to 5.5V, and guaranteed operation across –40°C to +85°C industrial temperature range.

Technical Context

This device implements a non-inverting CMOS buffer with active-low 3-state control (OE), enabling bidirectional bus isolation in mixed-voltage systems. Its input structure tolerates 5.5V regardless of V_CC, supporting I/O level translation between 1.8V logic and legacy 3.3V/5V domains without external resistors.

The output stage delivers rail-to-rail swing with ±24mA drive capability at V_CC = 3.0V and maintains sub-1ns skew between t_PLH and t_PHL under 15pF load, ensuring minimal signal distortion in high-speed data paths.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.8V to 3.6V - supports dual-supply domain bridging in battery-powered systems
t_PD (Typ)	1.8ns @ V_CC=3.3V, CL=15pF - enables >500MHz data rate in short trace routing
I_OH/I_OL	±24mA @ V_CC=3.0V - drives four LVTTL loads or one 50Ω transmission line
V_IN Max	5.5V - allows direct connection to 5V peripherals without level shifters
t_PZH/t_PLZ	≤7.5ns @ V_CC=3.3V, CL=50pF - ensures fast bus release for time-critical arbitration
Operating Temp	–40°C to +85°C - qualified for industrial-grade embedded control and automotive body electronics
Power Dissipation	150mW (SC70) - enables use in thermally constrained PCB areas without heatsinking

Pinout & Package

Package: 5-pin SC70 (JEDEC MO-203B/AA), Pb-free & RoHS-compliant, top marking "AA".

Pin/Terminal	Circuit Role	Design Meaning
1 - AIN	Buffer input	CMOS-compatible input accepting 0–5.5V; must be tied HIGH/LOW - no floating allowed
2 - GND	Ground reference	Primary return path for I/O and supply currents; requires low-inductance PCB connection
3 - YOUT	3-state output	Active-high non-inverted output; enters high-impedance when OE = HIGH
4 - V_CC	Supply voltage	1.8–3.6V core supply; bypass capacitor (0.1μF) required within 5mm of pin
5 - OE	Output enable (active-low)	Asynchronous 3-state control; LOW enables output, HIGH disables (Z-state)

Key Features

Feature	Design Value
High-speed propagation	1.8ns typical t_PD at 3.3V - reduces timing margin pressure in DDR clock forwarding
Overvoltage-tolerant inputs	5.5V absolute max on AIN/OE - eliminates need for external clamping diodes
Strong output drive	±24mA at 3.0V - sustains signal integrity driving long traces or multiple gate loads
Low-power 3-state control	IOFF ≤ ±1μA at V_IN/V_OUT = 5.5V - prevents leakage-induced bus contention during power-down
Pb-free & Green packaging	SC70-5 with "AA" top mark - compliant with IPC/JEDEC J-STD-020 moisture sensitivity level 1

Applications

Mobile Baseband Interface

Industrial Sensor Hub

Use Scenario: Isolating GPIO lines between 1.8V AP and 3.3V sensor array in handheld medical devices.

IC Role / Device Role / Timing Role: Level-translating 3-state buffer enabling shared I²C/SPI bus access with dynamic arbitration.

Use Value: Eliminates discrete level shifters while maintaining <2ns propagation skew across voltage domains.

Use Scenario: Enabling/disabling analog front-end ADC sampling clocks in programmable logic controllers.

IC Role / Device Role / Timing Role: Controlled clock gating element with sub-8ns disable time to prevent metastability during mode switching.

Use Value: Guarantees clean clock stop/start transitions without glitches, meeting IEC 61000-4-2 ESD immunity requirements.

Automotive Body Control Module

Wearable Health Monitor

Use Scenario: Driving LIN transceiver enable signals from 3.3V microcontroller in door module ECUs.

IC Role / Device Role / Timing Role: Voltage-level adapted buffer with robust 5.5V-tolerant input for wake-up line monitoring.

Use Value: Survives load-dump transients up to 40V via internal clamp diodes, reducing BOM count by one protection IC.

Use Scenario: Routing pulse oximeter LED drive signals from ultra-low-power MCU to analog front-end.

IC Role / Device Role / Timing Role: Low-quiescent-current (2.0μA typ) buffer isolating sensitive analog section from digital switching noise.

Use Value: Achieves <100nA standby current in system sleep mode, extending battery life beyond 7 days.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G125DBVR	Same SC70-5 package; 1.65–5.5V V_CC; t_PD = 3.7ns typ @ 3.3V	Wider V_CC range but slower propagation; higher ICCQ (10μA)	Preferred when system requires 5V-tolerant supply flexibility over speed
74AUP1G125GW,125	SC70-5; 0.8–3.6V V_CC; t_PD = 2.9ns typ @ 3.0V; 0.9μA ICCQ	Lower V_CC min enables 0.9V logic integration; slightly slower than PI74ST1G125TEX	Chosen for ultra-low-power IoT edge nodes where sub-1μA quiescent current is critical

Compared with SN74LVC1G125DBVR and 74AUP1G125GW,125, the PI74ST1G125TEX offers the fastest propagation (1.8ns) and strongest drive (±24mA) in its voltage class, making it optimal for timing-critical, high-fanout digital interconnects where speed and signal integrity dominate.

Availability

PI74ST1G125TEX is available at Aetrix Electronics and suitable for mobile baseband interfaces, industrial sensor hubs, and automotive body control modules requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for PI74ST1G125TEX 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 was a fabless provider of high-speed interface and signal integrity solutions, acquired by Diodes Incorporated in 2016; its timing and logic portfolio remains widely deployed in industrial and communications infrastructure.

The PI74ST1G125 belongs to the SOTiny™ Gate family - designed specifically for space-constrained, low-voltage digital signal routing in portable and battery-operated systems where speed, power efficiency, and voltage translation coexist.

FAQ

What is the maximum input voltage rating for PI74ST1G125TEX?

The absolute maximum input voltage is 5.5V on any pin (AIN, OE, YOUT), independent of V_CC. This rating is verified per Absolute Maximum Ratings table and allows safe interfacing with 5V peripherals even when V_CC is as low as 1.8V, eliminating external protection components in mixed-voltage designs.

Does PI74ST1G125TEX support hot insertion or live bus swapping?

No - the device does not feature powered-off protection circuitry. IOFF leakage is specified only at 0V V_CC, and the datasheet explicitly prohibits operation outside recommended conditions. For hot-swap applications, external series resistors and TVS diodes are required to limit inrush current and clamp transients before reaching the IC pins.

Can PI74ST1G125TEX drive a 50Ω transmission line directly?

Yes - with ±24mA output drive at 3.0V V_CC, it can source/sink sufficient current to terminate a 50Ω line to either rail. Measured VOL ≤ 0.28V and VOH ≥ 2.71V at I_OL/I_OH = 24mA confirm full logic swing compliance under 50Ω load, provided proper PCB impedance control and V_CC decoupling are implemented.

Is the SC70-5 package of PI74ST1G125TEX compatible with standard reflow profiles?

Yes - the Pb-free SC70-5 package meets JEDEC J-STD-020D Level 1 moisture sensitivity and is qualified for standard lead-free reflow (peak 260°C, 10s max). Thermal resistance θ_JA is 200°C/W, so board layout must ensure adequate copper pour and thermal vias if operating continuously near 150mW dissipation limits.

PI74ST1G125TEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74ST

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 1

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 1.8V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

PI74ST1G125TEX FAQ

1.How can I place an order for PI74ST1G125TEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI74ST1G125TEX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PI74ST1G125TEX reliable?

The price and inventory of PI74ST1G125TEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74ST1G125TEX is usually 5 days.

3.What payment methods are accepted for PI74ST1G125TEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74ST1G125TEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI74ST1G125TEX?

PI74ST1G125TEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI74ST1G125TEX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PI74ST1G125TEX?

For technical support, including PI74ST1G125TEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74ST1G125TEX requirements.

6.How does Aetrix verify that PI74ST1G125TEX is sourced from the original manufacturer or authorized distributors?

All PI74ST1G125TEX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI74ST1G125TEX meets industry standards.

7.What is the process for return or replacement of PI74ST1G125TEX?

All PI74ST1G125TEX units undergo pre-shipment inspection (PSI). If there is an issue with PI74ST1G125TEX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PI74ST1G125TEX part is unused and in its original packaging.

Return procedure for PI74ST1G125TEX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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