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

Diodes Incorporated PI74ST1G32CEX

Name: PI74ST1G32CEX
Brand: Diodes Incorporated
SKU: PI74ST1G32CEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI74ST1G32CEX

Manufacturer:: Diodes Incorporated

Category:: Gates and Inverters

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

Datasheet:: PI74ST1G32CEX.pdf

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

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Product details

Overview

PI74ST1G32CEX from Pericom Semiconductor is a single 2-input OR gate operating from 1.8V to 3.6V V_CC, delivering 1.8ns typical propagation delay, ±24mA output drive at 3V, and high-impedance power-down capability. It is used in level-shifting logic interfaces and low-power portable system control paths.

For engineers reviewing the PI74ST1G32CEX datasheet, PI74ST1G32CEX pinout, PI74ST1G32CEX application, or PI74ST1G32CEX equivalent, key selection criteria include supply voltage range (1.8–3.6V), propagation delay (1.8ns typ), output drive strength (±24mA), input/output voltage tolerance (–0.5V to +6V), and SOT23/SC70 package compatibility.

Technical Context

This device implements standard positive-logic OR functionality with TTL-compatible input thresholds and CMOS-level output swing. Its internal structure supports rail-to-rail operation across the full 1.8V–3.6V supply range without external biasing.

It features power-down high-impedance inputs and outputs when V_CC = 0V, enabling safe bus sharing in multi-driver systems. Input leakage remains ≤±1μA over –40°C to +85°C, ensuring stable logic states during partial power-down.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.8V to 3.6V - Enables direct interface with 1.8V, 2.5V, and 3.3V logic domains without level shifters.
t_PD	1.8ns typical - Supports >300MHz toggle rates in critical timing paths.
I_OH/I_OL	±24mA at V_CC = 3V - Drives up to 10 LVTTL loads or 20 CMOS loads directly.
V_IH/V_IL	V_IH = 0.7×V_CC, V_IL = 0.3×V_CC - Ensures robust noise margin across supply range.
Input/Output Voltage Range	–0.5V to +6V - Allows safe hot-swap and mixed-voltage I/O handling without clamping diodes.
Power-Down State	High-impedance I/Os at V_CC = 0V - Prevents back-driving and contention on shared buses.

Pinout & Package

Package: 5-pin SC70 (JEDEC MO-203B/AA) - 2.00mm × 1.25mm footprint, 0.65mm pitch, suitable for high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 (AIN)	Input A	Primary logic input; accepts 1.8V–3.6V compatible signals; must be tied HIGH or LOW if unused.
2 (BIN)	Input B	Secondary logic input; electrically identical to AIN; shares same input threshold and leakage specs.
3 (GND)	Ground	Reference node for all I/O and internal circuitry; requires low-inductance connection to system ground plane.
4 (YOUT)	Output Y	OR result of A and B; drives CMOS/TTL loads with rail-to-rail swing and ±24mA capability.
5 (V_CC)	Supply	Positive supply input; bypass capacitor (0.1μF) required within 5mm for stable high-speed operation.

Key Features

Feature	Design Value
High-speed propagation	1.8ns typical t_PD at 3.3V - Enables use in sub-5ns timing-critical paths without added delay buffers.
Wide V_CC range	1.8V–3.6V operation - Eliminates need for separate voltage translators in mixed-supply systems.
Power-down isolation	Hi-Z I/Os at V_CC = 0V - Permits safe insertion/removal in live backplane or hot-swap applications.
Robust I/O protection	–0.5V to +6V absolute max ratings - Withstands ESD transients and voltage overshoot without external protection.

Applications

USB 2.0 Peripheral Control

Low-Power Sensor Hub Logic

Use Scenario: OR-ing enable signals from multiple USB upstream ports to activate a shared PHY reset line.

IC Role / Device Role / Timing Role: Single-gate combinatorial logic element performing active-HIGH signal aggregation with sub-2ns delay.

Use Value: Reduces board area vs. discrete transistor solution while maintaining deterministic timing and eliminating race conditions.

Use Scenario: Combining motion and ambient light sensor interrupt outputs to trigger MCU wake-up.

IC Role / Device Role / Timing Role: Low-quiescent-current OR gate enabling fast wake-up response (<2ns latency) from any sensor event.

Use Value: Achieves <1μA standby current per input path and eliminates software polling overhead.

Industrial PLC I/O Expansion

Wearable Device Power Sequencing

Use Scenario: Merging fault flags from multiple isolated digital input modules into a centralized alarm bus.

IC Role / Device Role / Timing Role: Fault-aggregation gate with wide input voltage tolerance (–0.5V to +6V) for interfacing with diverse field devices.

Use Value: Prevents false alarms due to ground offset or transient coupling across isolation barriers.

Use Scenario: Enabling battery charger IC only when both battery presence and system-on signals are asserted.

IC Role / Device Role / Timing Role: Power-control logic gate with guaranteed 1.8V operation and zero static current in disabled state.

Use Value: Extends shelf life by blocking leakage paths between unpowered subsystems.

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	Same 5-pin SC70 package; 1.65–5.5V V_CC; 3.7ns t_PD typical at 3.3V	Broader supply range but slower speed; higher input capacitance (4.5pF vs. 4pF)	Select when system uses 5V logic or requires wider V_CC margin at cost of timing performance.
NC7SZ32P5X	Same 5-pin SC70; 1.65–5.5V V_CC; 3.5ns t_PD typical at 3.3V; lower drive (±24mA at 3V same)	Higher max V_CC (5.5V) but no power-down Hi-Z mode	Select when hot-swap isolation is not required and 5V-tolerant inputs are needed.

Compared with SN74LVC1G32DBVR and NC7SZ32P5X, PI74ST1G32CEX offers the fastest propagation delay (1.8ns) and unique power-down high-impedance I/Os-critical for dynamic bus arbitration and low-power retention modes where signal contention must be avoided.

Availability

PI74ST1G32CEX is available at Aetrix Electronics and suitable for USB peripheral control, wearable power sequencing, and industrial sensor aggregation requiring stable component supply and long-term manufacturability.

Supply support for PI74ST1G32CEX 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-performance interface, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2017; its logic portfolio continues under Diodes' quality and support infrastructure.

The PI74ST1G32CEX belongs to the SOTiny™ Gate ST series-designed specifically for space-constrained, low-power portable and industrial applications demanding nanosecond-speed discrete logic with minimal board footprint.

FAQ

What is the maximum recommended operating temperature for PI74ST1G32CEX?

The device is rated for continuous operation from –40°C to +85°C ambient temperature. Junction temperature must not exceed +125°C under worst-case power dissipation (200mW in SOT23). Derating is required above +70°C ambient when driving heavy loads or operating at high frequency.

Can unused inputs be left floating?

No. Unused inputs must be externally tied to V_CC or GND. Floating inputs cause increased ICC current, unpredictable logic states, and potential oscillation due to internal input stage metastability. The datasheet explicitly prohibits floating connections under Recommended Operating Conditions.

Does PI74ST1G32CEX support 5V-tolerant inputs?

No. Inputs are not 5V-tolerant. Absolute maximum input voltage is +6V, but functional operation is only guaranteed within –0.5V to V_CC + 0.3V. Applying 5V to an input while V_CC = 1.8V violates DC input voltage limits and risks latch-up or permanent damage.

Is there a lead-free and RoHS-compliant version?

Yes. The "E" suffix in the ordering code (e.g., PI74ST1G32CEX) denotes Pb-free and Green compliance per JEDEC J-STD-609 and RoHS Directive 2011/65/EU. The SC70 package uses matte tin finish with NiPdAu underplate and meets MSL Level 1 moisture sensitivity requirements.

PI74ST1G32CEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74ST

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:: 1.8V ~ 3.6V

Current - Quiescent (Max):: 2 µA

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

Input Logic Level - Low:: -

Input Logic Level - High:: -

Max Propagation Delay @ V, Max CL:: 3.8ns @ 3.3V, 50pF

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

PI74ST1G32CEX FAQ

1.How can I place an order for PI74ST1G32CEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI74ST1G32CEX 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 PI74ST1G32CEX reliable?

The price and inventory of PI74ST1G32CEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74ST1G32CEX is usually 5 days.

3.What payment methods are accepted for PI74ST1G32CEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74ST1G32CEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI74ST1G32CEX?

PI74ST1G32CEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI74ST1G32CEX 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 PI74ST1G32CEX?

For technical support, including PI74ST1G32CEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74ST1G32CEX requirements.

6.How does Aetrix verify that PI74ST1G32CEX is sourced from the original manufacturer or authorized distributors?

All PI74ST1G32CEX 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 PI74ST1G32CEX meets industry standards.

7.What is the process for return or replacement of PI74ST1G32CEX?

All PI74ST1G32CEX units undergo pre-shipment inspection (PSI). If there is an issue with PI74ST1G32CEX, 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 PI74ST1G32CEX part is unused and in its original packaging.

Return procedure for PI74ST1G32CEX:

1.Submit a request within 90 days.

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

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