My Inquiry
My Account
Diodes Incorporated PI74LPT373AS
- Part No.:
- PI74LPT373AS
- Manufacturer:
- Diodes Incorporated
- Category:
- Latches
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PI74LPT373AS.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,076
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI74LPT373AS from Pericom Semiconductor is an 8-bit transparent latch with 3-state outputs, designed for bus-oriented data latching in mixed-voltage systems. It operates at 3.3V supply (2.7–3.6V), supports 5V-tolerant inputs/outputs, delivers ±24 mA output drive, and features 4.2 ns max propagation delay (LPT373C grade) and industrial temperature range (–40°C to +85°C). Used in memory interface and address/data bus isolation.
For engineers reviewing the PI74LPT373AS datasheet, PI74LPT373AS pinout, PI74LPT373AS application, or PI74LPT373AS equivalent, key selection criteria include 3.3V/5V bidirectional voltage translation capability, low ground bounce, hysteresis on all inputs, and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The PI74LPT373AS implements a dual-control transparent latch architecture: LE (active-HIGH) enables real-time data pass-through, while OE (active-LOW) independently controls 3-state output enable/disable. Its CMOS design uses 0.6 µm process for speed-power optimization.
It functions as a level-shifting bus latch-inputs accept 3.3V or 5V logic levels without external biasing, and outputs drive either 3.3V buses or 5V-tolerant loads directly. Hysteresis (150 mV) on all inputs improves noise immunity in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - ensures stable operation in standard 3.3V systems with ±10% rail tolerance |
| Propagation Delay (tPLH/tPHL) | 4.2 ns max (LPT373C) - enables ≤238 MHz latch-to-latch timing in high-speed bus interfaces |
| Output Drive Strength | ±24 mA - sufficient to drive 50 Ω transmission lines or multiple LVTTL/LCX loads without buffering |
| Input Hysteresis | 150 mV - suppresses false triggering from slow-rising or noisy control signals like LE/OE |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Input Voltage Range | –0.5 V to +7.0 V - allows direct interfacing with 5V logic sources without level shifters |
| Quiescent Current | 10 µA typical - minimizes standby power in battery-backed or energy-sensitive applications |
Pinout & Package
PI74LPT373AS is packaged in a 20-pin plastic TSSOP (173 mil width), pin-compatible with industry-standard SOIC-20 footprints using adapter layout. The package supports reflow soldering and meets JEDEC MS-013 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply Input | 3.3V primary supply rail; powers internal logic and output drivers |
| GND | Ground Reference | Common return path for all I/O and internal circuitry; critical for noise suppression |
| D0–D7 | Data Inputs | Asynchronous parallel data inputs accepting 3.3V or 5V logic; hysteresis enhances noise margin |
| O0–O7 | 3-State Outputs | Bi-directionally driven outputs; high-impedance state (Z) when OE = HIGH disables bus contention |
| LE | Latch Enable | Active-HIGH control: data passes transparently when HIGH; latches data on falling edge |
| OE | Output Enable | Active-LOW control: enables outputs when LOW; places O0–O7 in high-Z when HIGH |
Key Features
| Feature | Design Value |
|---|---|
| 5V-Tolerant Mixed-Signal Operation | Inputs accept 0–5.5 V; outputs drive 3.3V buses or interface directly with 5V-tolerant receivers |
| Balanced Output Drive | ±24 mA sink/source capability ensures matched rise/fall times and reduced signal skew |
| Low Ground Bounce | Optimized output switching sequencing minimizes simultaneous switching noise on shared GND planes |
| Hysteresis on All Inputs | 150 mV input threshold hysteresis prevents chatter on slow or noisy LE/OE control lines |
| Industrial Temperature Range | –40°C to +85°C operation validated across full voltage and load conditions per JEDEC JESD22-A104 |
Applications
| Memory Interface Buffering | Address/Data Bus Isolation |
|---|---|
Use Scenario: Latching address or data signals between a 3.3V microcontroller and legacy 5V SRAM or EPROM. IC Role / Device Role / Timing Role: Transparent latch synchronizing asynchronous bus transfers; LE tied to memory write strobe, OE controlled by chip select. Use Value: Eliminates need for discrete level shifters while maintaining <4.2 ns timing integrity for 25+ MHz bus cycles. | Use Scenario: Isolating shared address/data bus between two processor domains operating at different voltage levels. IC Role / Device Role / Timing Role: Bidirectional bus latch enabling time-multiplexed access; OE manages bus arbitration, LE captures valid data windows. Use Value: Prevents voltage conflict and contention during domain handoff, supporting hot-swap-capable modular backplanes. |
| Industrial PLC I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Interfacing 3.3V FPGA I/O banks to 5V industrial sensors or actuators via DIN-rail-mounted I/O modules. IC Role / Device Role / Timing Role: Voltage-translating latch capturing sensor status or command signals under noisy EMI conditions. Use Value: 150 mV input hysteresis rejects conducted noise on long field wiring; ±24 mA drive sustains signal integrity over 10 cm traces. | Use Scenario: Capturing and holding digital stimulus patterns in automated test equipment (ATE) during multi-site parallel testing. IC Role / Device Role / Timing Role: Precision timing latch synchronizing pattern generator outputs to DUT clock domains with minimal skew. Use Value: 0.5 ns max output skew ensures sub-nanosecond alignment across 8-bit parallel test vectors, critical for timing margin validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC373APWR | 3.3V-only I/O; no 5V tolerance; 5.5 ns max tPD; lower drive (±24 mA same, but no 5V bus drive) | Requires external level shifters for 5V bus interfacing; suited for pure 3.3V systems only | Select when cost sensitivity outweighs mixed-voltage flexibility and board space permits added components |
| 74ALVC16373DGGR | 16-bit version; 3.3V supply; 5V-tolerant inputs only (not outputs); 4.9 ns max tPD | Provides double data width but lacks 5V-tolerant outputs - cannot drive 5V loads directly | Choose for wider bus width needs where output voltage translation is handled elsewhere in the signal chain |
Compared with SN74LVC373APWR and 74ALVC16373DGGR, the PI74LPT373AS uniquely combines true bidirectional 5V-tolerant I/O, sub-5 ns timing, and industrial temperature rating in a compact TSSOP-20 package-making it optimal for space-constrained, mixed-voltage industrial interfaces requiring robust noise immunity and zero external translation components.
Availability
PI74LPT373AS is available at Aetrix Electronics and suitable for memory interface buffering, address/data bus isolation, and industrial PLC I/O expansion requiring stable component supply and long-term lifecycle support.
Supply support for PI74LPT373AS 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, later acquired by Diodes Incorporated in 2016.
The PI74LPT series targets high-speed, low-power logic interfacing in mixed-voltage embedded systems-designed specifically for seamless integration between 3.3V controllers and legacy 5V peripherals without external level-shifting circuitry.
FAQ
Can PI74LPT373AS operate with a 5V supply?
No. The PI74LPT373AS is specified for 2.7–3.6V VCC operation only. While its inputs tolerate up to 7.0V and outputs can safely drive 5V-tolerant buses, applying 5V to VCC exceeds absolute maximum ratings and risks permanent damage. It is not a 5V-supply device.
What is the function of the hysteresis on input pins?
The 150 mV hysteresis on LE, OE, and D0–D7 inputs raises the effective VIH threshold after a HIGH transition and lowers the effective VIL threshold after a LOW transition. This prevents multiple toggles due to slow edges or noise near the switching threshold-critical for reliable operation in electrically noisy industrial environments.
How does PI74LPT373AS handle bus contention during output enable transitions?
During OE transitions, the outputs enter a controlled three-state disable sequence that avoids momentary short-circuits or glitches. The datasheet specifies tPZH (1.5–5.5 ns) and tPHZ (1.5–5.0 ns) to ensure clean, overlap-free enable/disable timing-preventing bus contention when multiple latches share a common data line in multiplexed systems.
Is PI74LPT373AS pin-compatible with standard 74LS373 or 74HC373 packages?
Electrically and functionally compatible with 74-series 373 logic, but physically pin-compatible only with SOIC-20 (S20) and TSSOP-20 (L20) variants-not with 20-pin DIP or narrow QSOP. Pin numbering matches JEDEC MS-013: VCC (pin 20), GND (pin 10), D0 (pin 1), O0 (pin 2), LE (pin 11), OE (pin 19), etc., as confirmed in the official pin configuration diagram.
PI74LPT373AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LPT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 2.7V ~ 3.6V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 1.5ns
- Current - Output High, Low:
- 24mA, 24mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
PI74LPT373AS FAQ
1.How can I place an order for PI74LPT373AS through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74LPT373AS 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 PI74LPT373AS reliable?
The price and inventory of PI74LPT373AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74LPT373AS is usually 5 days.
3.What payment methods are accepted for PI74LPT373AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74LPT373AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74LPT373AS?
PI74LPT373AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74LPT373AS 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 PI74LPT373AS?
For technical support, including PI74LPT373AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74LPT373AS requirements.
6.How does Aetrix verify that PI74LPT373AS is sourced from the original manufacturer or authorized distributors?
All PI74LPT373AS 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 PI74LPT373AS meets industry standards.
7.What is the process for return or replacement of PI74LPT373AS?
All PI74LPT373AS units undergo pre-shipment inspection (PSI). If there is an issue with PI74LPT373AS, 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 PI74LPT373AS part is unused and in its original packaging.
Return procedure for PI74LPT373AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI74LPT373AS Tags
-
SN74HC573APWR
Texas Instruments
-
SN74HC573ADWR
Texas Instruments
-
SN74AHC573PWR
Texas Instruments
-
SN74HCT573DWR
Texas Instruments
-
SN74HC373N
Texas Instruments
-
SN74HC573AN
Texas Instruments
-
74VHC573MTCX
onsemi
-
MC74LCX573DTR2G
onsemi
-
74AUP1G373GW,125
Nexperia USA Inc.
-
SN74LVC1G373DCKR
Texas Instruments
-
SN74LVC1G373DBVR
Texas Instruments
-
NC7SZ373P6X
onsemi
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
