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Diodes Incorporated PI74LPT16373AV
- Part No.:
- PI74LPT16373AV
- Manufacturer:
- Diodes Incorporated
- Category:
- Latches
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
PI74LPT16373AV.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,022
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Product details
Overview
PI74LPT16373AV from Pericom Semiconductor is a 16-bit transparent latch with dual 8-bit latch control, 3-state outputs, 5V-tolerant inputs/outputs, ±24 mA drive strength, and industrial temperature range (–40°C to +85°C). It serves as a bidirectional bus interface translator in mixed-voltage 3.3V/5.0V systems such as memory expansion subsystems.
For engineers reviewing the PI74LPT16373AV datasheet, PI74LPT16373AV pinout, PI74LPT16373AV application, or PI74LPT16373AV equivalent, key selection criteria include 5V-tolerant I/O operation, low propagation delay (≤5.5 ns), high-impedance output enable timing, and SSOP-48 package compatibility with legacy bus architectures.
Technical Context
The device implements two independent 8-bit transparent latches controlled by separate Latch Enable (xLE) signals and shares a common Output Enable (xOE) for 3-state bus driving. Each latch operates synchronously on xLE HIGH (transparent mode) and captures data on xLE LOW transition with 2.0 ns minimum setup and 1.5 ns hold time.
Its 5V-tolerant I/O architecture allows direct interfacing between 3.3V logic and 5V buses without external level shifters; input hysteresis (150 mV) ensures noise immunity, while distributed VCC/GND pins and low ground bounce support stable high-speed bus operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 3.6V - supports 3.3V nominal operation with ±0.3V tolerance |
| Propagation Delay (xDx→xOx) | ≤4.2 ns (max, LPT16373C grade) - enables ≤238 MHz bus toggle rate |
| Output Drive Strength | ±24 mA - drives standard TTL loads and 50 Ω transmission lines |
| Input Voltage Tolerance | –0.5V to +7.0V - accepts 3.3V or 5.0V logic levels on all inputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded control environments |
| Input Hysteresis | 150 mV - rejects noise on shared bus control lines (e.g., LE, OE) |
| Quiescent Current | ≤10 µA - minimizes standby power in battery-backed systems |
Pinout & Package
PI74LPT16373AV is packaged in a 48-pin plastic SSOP (300-mil wide), with 24 pins per side, exposed thermal pad not present, and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low 3-state output enable | Independent control of two 8-bit output groups; HIGH = high-impedance state |
| 1LE, 2LE | Active-high latch enable | Enables transparent pass-through when HIGH; latches data on falling edge |
| 1D0–1D7, 2D0–2D7 | Data inputs | Two 8-bit parallel input buses compatible with 3.3V/5V logic levels |
| 1O0–1O7, 2O0–2O7 | 3-state outputs | Drive 50 Ω loads or 5V buses directly; sink/source up to 24 mA |
| VCC | Power supply | 3.3V core supply only; supports 2.7–3.6V range |
| GND | Ground reference | Eight dedicated GND pins minimize switching noise and ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant I/O | Inputs and outputs operate safely at 5V while powered from 3.3V - eliminates external level translators in mixed-voltage backplanes |
| Balanced ±24 mA drive | Equal sourcing and sinking capability ensures clean signal edges into capacitive and resistive bus loads |
| Dual 8-bit latch architecture | Independent LE controls allow asymmetric data capture timing across two 8-bit channels - supports split-bus protocols |
| Low ground bounce design | Distributed GND pins and internal layout reduce simultaneous switching noise - critical for EMI-sensitive industrial applications |
| Hysteresis on all inputs | 150 mV input threshold margin prevents chatter on slow-rising control signals like OE/LE in noisy environments |
Applications
| Memory Expansion Interface | Industrial PLC Backplane |
|---|---|
Use Scenario: Interfacing 3.3V FPGA or microcontroller to legacy 5V SRAM or EPROM modules. IC Role / Device Role / Timing Role: Bidirectional voltage-translating transparent latch buffering address/data bus lines. Use Value: Eliminates discrete level shifters; maintains <4.2 ns propagation delay for synchronous 25 MHz memory access. | Use Scenario: Isolating CPU-side 3.3V control logic from 5V I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bus-hold latch for deterministic state retention during hot-swap or reset events. Use Value: Dual 8-bit latch control enables independent timing for digital input and output banks. |
| Automotive Diagnostic Gateway | Test Equipment Bus Adapter |
Use Scenario: Translating JTAG or CAN controller signals between 3.3V SoC and 5V legacy diagnostic hardware. IC Role / Device Role / Timing Role: Level-shifting latch for protocol bridge interfaces requiring glitch-free signal capture. Use Value: 150 mV input hysteresis suppresses noise from automotive EMI; –40°C to +85°C rating ensures reliability under hood conditions. | Use Scenario: Adapting automated test equipment (ATE) to legacy 5V DUTs using modern 3.3V pattern generators. IC Role / Device Role / Timing Role: Synchronized bus latch enabling precise timing alignment between tester and device-under-test. Use Value: 2.0 ns setup/1.5 ns hold time supports sub-500 ps timing margins in high-speed functional testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16373ADGGR | 3.3V-only I/O (no 5V tolerance); 24-pin VSSOP package; lower drive (±24 mA same, but no 5V bus drive) | Requires external level shifters for 5V bus connection; unsuitable for direct 5V bus termination | Select only for pure 3.3V systems where board space is constrained and 5V interoperability is unnecessary |
| 74ALVC16373PAG | Same 5V-tolerant I/O spec; 48-pin TSSOP (A) package; slightly higher max propagation delay (5.2 ns vs 4.2 ns) | Compatible pinout for TSSOP-48 footprint; identical function but slower timing margin | Choose when TSSOP-48 is preferred over SSOP-48 and 1.0 ns timing budget slack exists |
Compared with SN74LVC16373ADGGR and 74ALVC16373PAG, PI74LPT16373AV uniquely combines 5V-tolerant I/O, SSOP-48 mechanical compatibility, and 4.2 ns max propagation delay - making it optimal for retrofitting legacy 5V bus systems with modern 3.3V controllers.
Availability
PI74LPT16373AV is available at Aetrix Electronics and suitable for memory expansion interfaces, industrial PLC backplanes, automotive diagnostic gateways, and test equipment bus adapters requiring stable component supply and long-term industrial lifecycle support.
Supply support for PI74LPT16373AV 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 timing solutions, acquired by Diodes Incorporated in 2017; its legacy logic portfolio remains widely deployed in industrial and communications infrastructure.
The PI74LPT family targets mixed-voltage bus bridging in legacy system upgrades, emphasizing 5V-tolerant operation, low-noise packaging, and drop-in compatibility with industry-standard double-density footprints.
FAQ
Can PI74LPT16373AV drive a 5V bus directly while powered from 3.3V?
Yes. Its outputs are 5V-tolerant and can be connected directly to a 5V bus without damage or level-shifting circuitry. The device draws power only from VCC (3.3V), but output pins tolerate up to +7.0V, enabling safe interfacing with 5V systems.
What is the minimum pulse width required on xLE for reliable latching?
The minimum xLE HIGH pulse width is 5.0 ns for the C-grade version. This ensures sufficient time for internal metastability resolution and guarantees correct data capture at the latch boundary under worst-case voltage and temperature conditions.
Does PI74LPT16373AV support hot insertion in live backplanes?
No. While it features 5V-tolerant I/O and high-impedance outputs, it lacks explicit hot-swap protection circuitry such as slew-rate control or undervoltage lockout. Live insertion requires external current-limiting and sequencing circuitry per system-level safety requirements.
How many GND pins does the SSOP-48 package have, and why is this important?
The PI74LPT16373AV in SSOP-48 has eight dedicated GND pins, strategically distributed across both sides of the package. This reduces ground impedance, minimizes simultaneous switching noise, and improves signal integrity in high-speed bus applications where multiple outputs switch concurrently.
PI74LPT16373AV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LPT
- Package/Case:
- 48-BSSOP (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:
- 48-SSOP
PI74LPT16373AV FAQ
1.How can I place an order for PI74LPT16373AV through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74LPT16373AV 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 PI74LPT16373AV reliable?
The price and inventory of PI74LPT16373AV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74LPT16373AV is usually 5 days.
3.What payment methods are accepted for PI74LPT16373AV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74LPT16373AV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74LPT16373AV?
PI74LPT16373AV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74LPT16373AV 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 PI74LPT16373AV?
For technical support, including PI74LPT16373AV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74LPT16373AV requirements.
6.How does Aetrix verify that PI74LPT16373AV is sourced from the original manufacturer or authorized distributors?
All PI74LPT16373AV 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 PI74LPT16373AV meets industry standards.
7.What is the process for return or replacement of PI74LPT16373AV?
All PI74LPT16373AV units undergo pre-shipment inspection (PSI). If there is an issue with PI74LPT16373AV, 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 PI74LPT16373AV part is unused and in its original packaging.
Return procedure for PI74LPT16373AV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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