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Home > Products > Integrated Circuits (ICs) > Logic > Latches

Diodes Incorporated PI74LPT16373AA

Name: PI74LPT16373AA
Brand: Diodes Incorporated
SKU: PI74LPT16373AA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI74LPT16373AA

Manufacturer:: Diodes Incorporated

Category:: Latches

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: PI74LPT16373AA.pdf

Description:: IC D-TYPE TRANSP SGL 8:8 48TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PI74LPT16373AA from Pericom Semiconductor is a 16-bit transparent latch with dual 8-bit latch control, 3-state outputs, 5V-tolerant inputs, and mixed-voltage translation capability (3.3V/5V). It operates from 2.7V–3.6V V_CC, delivers ±24 mA output drive, and supports industrial temperature range (–40°C to +85°C) in a 48-pin TSSOP package. Used for bidirectional bus buffering in memory interface and data acquisition subsystems.

For engineers reviewing the PI74LPT16373AA datasheet, PI74LPT16373AA pinout, PI74LPT16373AA application, or PI74LPT16373AA equivalent, key selection criteria include 5V-tolerant input compatibility, low propagation delay (≤5.2 ns), high-impedance output enable timing, and dual-latch configuration flexibility for segmented bus control.

Technical Context

The PI74LPT16373AA implements two independent 8-bit transparent latches controlled by separate Latch Enable (xLE) inputs and a shared Output Enable (xOE) active-low signal. Each latch section passes data transparently when xLE is HIGH and latches on the falling edge of xLE.

Its 5V-tolerant I/O architecture allows direct interfacing between 3.3V logic domains and legacy 5V buses without external level shifters. Input hysteresis (150 mV) ensures noise immunity, while distributed V_CC/GND pins and low ground bounce design minimize switching noise in high-speed digital systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7V–3.6V - Enables operation in standard 3.3V systems with margin for supply variation.
Propagation Delay (xLE→xOx)	≤5.2 ns - Supports >100 MHz bus toggle rates with deterministic timing alignment.
Output Drive	±24 mA - Sinks or sources sufficient current to drive 50 Ω transmission lines or multiple CMOS loads.
Input Voltage Tolerance	–0.5V to +7.0V - Accepts 5V logic inputs while powered from 3.3V, enabling voltage translation.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded control and instrumentation environments.
Input Hysteresis	150 mV - Rejects noise on slow-rising/falling signals in noisy PCB layouts or long traces.
Quiescent Current	≤10 µA - Minimizes standby power in battery-backed or low-power monitoring circuits.

Pinout & Package

PI74LPT16373AA is housed in a 48-pin thin shrink small-outline package (TSSOP-A), 173 mil wide, with lead-free and RoHS-compliant options available.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low 3-state output enable	Independent control of each 8-bit output bank; enables bus sharing without contention.
1LE, 2LE	Active-high latch enable	Separate enable per 8-bit section allows staggered or synchronized latching of parallel data streams.
1D0–1D7, 2D0–2D7	Data inputs	16 total inputs accepting 3.3V or 5V logic levels; no external level shifters required.
1O0–1O7, 2O0–2O7	3-state outputs	Drive 50 Ω loads or TTL/CMOS buses; high-impedance state isolates outputs during bus arbitration.
V_CC (Pins 7, 18, 31, 42)	Power supply	Four dedicated V_CC pins reduce IR drop and improve transient response across wide bus widths.
GND (Pins 4, 10, 15, 21, 39, 45)	Ground reference	Six GND pins provide low-inductance return paths and suppress simultaneous switching noise.

Key Features

Feature	Design Value
5V-tolerant I/O	Inputs accept 0–5V signals while V_CC = 3.3V, eliminating external translators in mixed-voltage backplanes.
Dual 8-bit latch architecture	Two independent LE controls allow partial bus updates-e.g., address vs. data latching in memory controllers.
Low ground bounce	Optimized pin layout and internal drive staging reduce ΔI/Δt-induced noise on shared ground planes.
Pb-free & Green packaging	TSSOP-A package meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3.
Balanced ±24 mA drive	Symmetric sourcing/sinking eliminates DC bias on termination resistors and improves signal integrity on stubbed buses.

Applications

Memory Interface Buffering

Data Acquisition Bus Isolation

Use Scenario: Latching address/data lines between a 3.3V microcontroller and 5V SRAM or EPROM in industrial PLC modules.

IC Role / Device Role / Timing Role: Acts as a voltage-translating, edge-triggered bus latch that synchronizes asynchronous memory access cycles.

Use Value: Eliminates discrete level shifters and reduces BOM count while maintaining <5.2 ns propagation delay for sub-100 ns memory read/write timing.

Use Scenario: Isolating sensor ADC output buses from host processor during calibration or standby modes in environmental monitoring systems.

IC Role / Device Role / Timing Role: Provides high-impedance bus disconnection via OE control, preventing back-driving of idle ADCs or multiplexers.

Use Value: Enables clean bus arbitration with zero leakage current (<±1 µA) and fast disable time (≤5.5 ns) to avoid metastability.

Industrial Backplane Interfacing

Legacy System Upgrade Bridge

Use Scenario: Interfacing modern 3.3V FPGA I/O banks to legacy 5V ISA or VME bus peripherals in test equipment.

IC Role / Device Role / Timing Role: Functions as a bidirectional voltage-level translator with latch synchronization for write strobes and data capture.

Use Value: Supports 5V-tolerant inputs and 3.3V-compatible outputs without external pull-ups, reducing board space and EMI risk.

Use Scenario: Retrofitting older 5V microprocessor-based motion controllers with new 3.3V motor driver ICs while retaining existing bus wiring.

IC Role / Device Role / Timing Role: Serves as a non-inverting, latch-controlled buffer that preserves timing margins during voltage domain transitions.

Use Value: Maintains setup/hold times (t_SU = 2.0 ns, t_H = 1.5 ns) across voltage domains, avoiding redesign of clock distribution networks.

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
SN74LVC16373A	3.3V-only I/O (no 5V tolerance); lower drive (±24 mA same), but higher ICCD (up to 75 µA/MHz)	Requires external clamping for 5V bus connection; unsuitable for direct 5V-tolerant interfacing	Select only if system uses exclusively 3.3V buses and requires TI's enhanced ESD rating (±2kV HBM)
74ALVC16373	Same 5V-tolerant inputs; slightly slower max t_PLH (6.5 ns); identical pinout and V_CC range	Compatible drop-in replacement with minor timing margin reduction; same thermal profile	Preferred where NXP supply chain continuity is prioritized over Pericom's lower ground bounce performance

Compared with SN74LVC16373A and 74ALVC16373, PI74LPT16373AA offers superior 5V-tolerance assurance, lower dynamic power consumption at 10 MHz, and optimized pin layout for reduced simultaneous switching noise-critical in high-density industrial backplanes.

Availability

PI74LPT16373AA is available at Aetrix Electronics and suitable for memory interface buffering, industrial backplane interfacing, and legacy system upgrade bridge applications requiring stable component supply and long-term lifecycle support.

Supply support for PI74LPT16373AA 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, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2016; its legacy logic portfolio remains widely deployed in industrial and communications infrastructure.

The PI74LPT16373AA belongs to Pericom's LPT (Low Power Translator) family, engineered specifically for mixed-voltage system bridging with emphasis on noise immunity, latch timing precision, and robust 5V-tolerant I/O in harsh industrial environments.

FAQ

Can PI74LPT16373AA operate with V_CC = 2.5V?

No. The device is specified for V_CC = 2.7V to 3.6V only. At 2.5V, input thresholds (VIH min = 2.2V) and output drive strength fall outside guaranteed limits, risking logic misreads and marginal bus driving. Operation below 2.7V is not characterized or supported.

Is PI74LPT16373AA pin-compatible with PI74LPT16374A?

No. PI74LPT16374A is a 16-bit D-type flip-flop with clocked edge-triggered operation, whereas PI74LPT16373AA is a transparent latch with level-sensitive enable. Pin functions differ: 374A uses CLK and CLR pins instead of LE and OE, and output behavior is fundamentally asynchronous vs. synchronous.

What is the maximum capacitive load this device can drive reliably?

PI74LPT16373AA is characterized for CL = 50 pF in switching tests. With ±24 mA drive and ≤5.2 ns propagation delay, it reliably drives up to 70 pF under typical PCB conditions (FR-4, 50 Ω trace), assuming proper decoupling and ground layout. Loads >100 pF require external buffering or slew-rate limiting.

Does PI74LPT16373AA support hot-swap insertion?

No. The device lacks hot-swap protection circuitry such as power-up sequencing control, undervoltage lockout, or current-limiting on V_CC. Insertion into a live 3.3V bus risks latch-up due to uncontrolled V_CC ramp and I/O pin biasing; use only in cold-insertion or power-gated systems.

PI74LPT16373AA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74LPT

Package/Case:: 48-TFSOP (0.240", 6.10mm 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-TSSOP

PI74LPT16373AA FAQ

1.How can I place an order for PI74LPT16373AA through Aetrix?

Please submit a Request for Quotation (RFQ) for PI74LPT16373AA 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 PI74LPT16373AA reliable?

The price and inventory of PI74LPT16373AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74LPT16373AA is usually 5 days.

3.What payment methods are accepted for PI74LPT16373AA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74LPT16373AA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI74LPT16373AA?

PI74LPT16373AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI74LPT16373AA 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 PI74LPT16373AA?

For technical support, including PI74LPT16373AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74LPT16373AA requirements.

6.How does Aetrix verify that PI74LPT16373AA is sourced from the original manufacturer or authorized distributors?

All PI74LPT16373AA 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 PI74LPT16373AA meets industry standards.

7.What is the process for return or replacement of PI74LPT16373AA?

All PI74LPT16373AA units undergo pre-shipment inspection (PSI). If there is an issue with PI74LPT16373AA, 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 PI74LPT16373AA part is unused and in its original packaging.

Return procedure for PI74LPT16373AA:

1.Submit a request within 90 days.

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

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