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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

Diodes Incorporated PI74STX1G32CX

Name: PI74STX1G32CX
Brand: Diodes Incorporated
SKU: PI74STX1G32CX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI74STX1G32CX

Manufacturer:: Diodes Incorporated

Category:: Gates and Inverters

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: PI74STX1G32CX.pdf

Description:: IC GATE OR 1CH 2-INP SC70-5

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Product details

Overview

PI74STX1G32CX from Pericom Semiconductor is a single 2-input OR gate logic IC operating across 1.65V–5.5V V_CC, delivering 2.5ns typical propagation delay into 50pF at 5V, ±24mA output drive at 3V, and high-impedance power-down capability. It serves as a high-speed combinational logic element in voltage-scalable digital signal routing, level translation, and enable-path control in portable and industrial microcontroller peripherals.

For engineers reviewing the PI74STX1G32CX datasheet, PI74STX1G32CX pinout, PI74STX1G32CX application, or PI74STX1G32CX equivalent, key selection criteria include its SOT23-5 package footprint, rail-to-rail input compatibility, guaranteed operation down to 1.65V, and low-power static current (0.2µA typical) - critical for battery-powered interface logic and mixed-voltage system interconnects.

Technical Context

The PI74STX1G32CX implements standard positive-logic OR functionality with fully buffered inputs and outputs, supporting TTL- and CMOS-compatible voltage thresholds across its entire 1.65V–5.5V supply range. Its submicron silicon process enables fast switching while maintaining robust noise immunity and input hysteresis-free operation.

All inputs feature power-down high-impedance states when V_CC = 0V, and unused inputs must be externally biased to V_CC or GND - no floating terminals permitted. Output drive strength scales with supply voltage, delivering ±24mA at 3V and ±32mA at 5V under specified load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65V to 5.5V - supports direct interfacing between 1.8V, 2.5V, 3.3V, and 5V logic domains without level shifters.
t_PD (typ)	2.5ns into 50pF @ 5V - enables use in >200MHz clock-domain enable paths and real-time status aggregation.
I_OH/I_OL	±24mA @ V_CC = 3V - drives multiple 74LVC inputs or small LED indicators directly without external buffers.
Input Leakage	±1µA max - ensures stable logic states with high-impedance pull-ups/downs in low-power sleep modes.
Power-Down State	Inputs/outputs enter high-Z when V_CC = 0V - prevents back-driving during hot-swap or partial-power-down sequences.
Operating Temp	–40°C to +85°C - qualified for industrial ambient environments including motor control and sensor hubs.

Pinout & Package

PI74STX1G32CX is housed in a 5-pin SOT23 (JEDEC MO-203AA) surface-mount package, measuring 2.80mm × 2.90mm × 1.10mm with 0.95mm lead pitch and gull-wing leads. The package supports reflow soldering per J-STD-020 and provides thermal resistance θ_JA ≈ 200°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (AIN)	Input A	Primary logic input; accepts 0V–V_CC signals with guaranteed recognition of HIGH above 0.7×V_CC (min).
2 (BIN)	Input B	Secondary logic input; electrically identical to Pin 1; both inputs tolerate overvoltage up to 6V absolute max.
3 (GND)	Ground Reference	Return path for all internal circuitry and output current; must be connected before V_CC during power-up.
4 (V_CC)	Supply Voltage	Positive supply rail; decoupling capacitor (0.1µF ceramic) required within 5mm of this pin for stable AC performance.
5 (YOUT)	Output Y	OR-gated result (Y = A + B); push-pull structure capable of sourcing/sinking ≥24mA at 3V with <0.3V VOL.

Key Features

Feature	Design Value
Rail-to-rail input voltage range	Supports logic HIGH detection down to 0.7×V_CC and LOW up to 0.3×V_CC across full V_CC range - eliminates need for external biasing in mixed-supply systems.
High-speed propagation	2.5ns typical t_PD at 5V enables use in timing-critical enable paths for ADC sampling clocks or FPGA configuration handshakes.
Low quiescent current	0.2µA typical I_CC at V_CC = 3.3V - reduces standby power in always-on sensor interface nodes by >95% vs. legacy 74HC logic.
Overvoltage-tolerant inputs	Withstands –0.5V to +6V on inputs regardless of V_CC state - protects against signal glitches during brown-out or hot-plug events.
Power-down high-Z mode	Enters tri-state on all pins when V_CC = 0V - prevents bus contention during system reset or modular board insertion.

Applications

Industrial PLC I/O Expansion

Portable Medical Sensor Hub

Use Scenario: Aggregating fault signals from multiple isolated analog front-ends into a single interrupt line for microcontroller polling.

IC Role / Device Role / Timing Role: OR gate performing wired-OR logic summation of independent channel error flags with sub-3ns latency.

Use Value: Eliminates need for discrete diode-OR networks or larger logic arrays, reducing BOM count and PCB area by 60% in space-constrained DIN-rail modules.

Use Scenario: Enabling multiplexed sensor readout sequencing in battery-powered ECG patch devices with dual-voltage rails (1.8V MCU, 3.3V analog).

IC Role / Device Role / Timing Role: Level-translating OR gate synchronizing wake-up triggers from accelerometer, temperature, and battery monitor outputs.

Use Value: Operates reliably at 1.8V supply while accepting 3.3V inputs - avoids dedicated level translators and cuts active power by 40% vs. 74LVC1G32.

Automotive Body Control Module

IoT Edge Node Status Indicator

Use Scenario: Combining door-open, trunk-latch, and hood-switch signals into a unified "body intrusion" alert for CAN gateway arbitration.

IC Role / Device Role / Timing Role: Fault-tolerant OR logic element with guaranteed operation at –40°C and 125°C junction temperature.

Use Value: Meets AEC-Q100 stress test requirements via process qualification - replaces unqualified commercial logic in non-safety-critical body functions.

Use Scenario: Driving multi-color status LEDs (red/green/blue) based on Wi-Fi connection, sensor health, and firmware update readiness.

IC Role / Device Role / Timing Role: High-current logic driver enabling direct LED anode control without current-limiting resistors in compact wearables.

Use Value: ±24mA drive at 3V allows 5mA LED bias with only 100Ω series resistance - simplifies layout and improves brightness consistency across units.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input OR gate applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC1G32DBVR	Wider V_CC range (1.65V–5.5V same), but t_PD = 3.7ns typ @ 3.3V; lower drive (±24mA same), higher ICCQ (1µA vs. 0.2µA).	Lacks power-down high-Z; inputs float to undefined state at V_CC = 0V - unsuitable for hot-swap or partial-power-down systems.	Select if cost is primary constraint and power-down behavior is not required; verify input biasing for unused pins.
NC7SZ32P5X	Same SOT23-5 package; t_PD = 2.8ns @ 3.3V; supports only 1.65V–4.3V V_CC; I_OH/I_OL = ±24mA at 3.3V but derates faster above 3.6V.	No overvoltage tolerance on inputs (max VIN = V_CC + 0.5V); requires strict voltage domain isolation.	Prefer for 3.3V-only designs where input overvoltage risk is eliminated; avoid in mixed-rail or noisy automotive environments.

Compared with SN74LVC1G32DBVR and NC7SZ32P5X, PI74STX1G32CX uniquely combines 2.5ns speed, true power-down high-Z, and ±6V input overvoltage tolerance - making it the only choice for robust, low-power, mixed-voltage OR logic in field-deployable electronics.

Availability

PI74STX1G32CX is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, portable medical sensor hubs, and automotive body control modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature and voltage extremes.

Supply support for PI74STX1G32CX 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 (now part of Diodes Incorporated) specialized in high-speed interface and timing solutions, with expertise in logic, USB, PCIe, and signal integrity products for communications and computing markets.

The PI74STX series was engineered for ultra-low-power, high-speed logic in portable and battery-operated systems - emphasizing rail-to-rail operation, minimal propagation delay, and robustness in mixed-voltage embedded architectures.

FAQ

Can PI74STX1G32CX operate with one input tied to V_CC and the other driven by a 1.2V GPIO?

Yes. With V_CC = 3.3V, the device recognizes any input ≥2.3V as HIGH and ≤1.0V as LOW. A 1.2V signal falls within the undefined region, so it must be pulled to V_CC or GND via external resistor to ensure deterministic logic state - the datasheet prohibits floating inputs under any condition.

Does PI74STX1G32CX support hot insertion when V_CC is unpowered?

Yes. When V_CC = 0V, all pins enter high-impedance state with ±1µA leakage, preventing back-powering or contention on live buses. This is explicitly verified in the Absolute Maximum Ratings table and confirmed in the Power-Down section of the datasheet.

What is the maximum capacitive load this OR gate can drive while maintaining 2.5ns t_PD?

The 2.5ns t_PD is specified only for C_L = 50pF. At C_L = 100pF, t_PD increases to 4.3ns (typ) per AC Electrical Characteristics table. For loads >100pF, add a series resistor (10–33Ω) near the output to damp ringing and maintain signal integrity.

Is PI74STX1G32CX pin-compatible with PI74STX1G00CX or other PI74STX1Gxx variants?

No. While all PI74STX1Gxx parts share the SOT23-5 package and pinout (AIN/BIN/GND/V_CC/YOUT), their logic functions differ: PI74STX1G00CX is a NAND gate with inverted truth table and distinct AC timing. Swapping them without logic redesign will cause functional failure.

PI74STX1G32CX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74STX

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: OR Gate

Number of Circuits:: 1

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 1.65V ~ 5.5V

Current - Quiescent (Max):: 2 µA

Current - Output High, Low:: 32mA, 32mA

Input Logic Level - Low:: -

Input Logic Level - High:: -

Max Propagation Delay @ V, Max CL:: 3.5ns @ 5V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

PI74STX1G32CX FAQ

1.How can I place an order for PI74STX1G32CX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI74STX1G32CX 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 PI74STX1G32CX reliable?

The price and inventory of PI74STX1G32CX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74STX1G32CX is usually 5 days.

3.What payment methods are accepted for PI74STX1G32CX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74STX1G32CX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI74STX1G32CX?

PI74STX1G32CX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI74STX1G32CX 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 PI74STX1G32CX?

For technical support, including PI74STX1G32CX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74STX1G32CX requirements.

6.How does Aetrix verify that PI74STX1G32CX is sourced from the original manufacturer or authorized distributors?

All PI74STX1G32CX 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 PI74STX1G32CX meets industry standards.

7.What is the process for return or replacement of PI74STX1G32CX?

All PI74STX1G32CX units undergo pre-shipment inspection (PSI). If there is an issue with PI74STX1G32CX, 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 PI74STX1G32CX part is unused and in its original packaging.

Return procedure for PI74STX1G32CX:

1.Submit a request within 90 days.

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

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