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Diodes Incorporated PI74VCX16373A
- Part No.:
- PI74VCX16373A
- Manufacturer:
- Diodes Incorporated
- Category:
- Latches
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PI74VCX16373A.pdf
- Description:
- IC 16-BIT TRANSP LATCH 48-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,517
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Product details
Overview
PI74VCX16373A from Pericom Semiconductor is a 16-bit transparent D-type latch with 3-state outputs, designed for bidirectional bus driving, I/O port buffering, and working register functions in mixed-voltage systems. It operates from 1.8V to 3.6V VDD, supports 3.6V I/O tolerance, delivers ±24mA balanced drive, and features live insertion capability with power-off high-impedance I/Os. Used in industrial embedded control interfaces requiring level-shifted data latching.
For engineers reviewing the PI74VCX16373A datasheet, PI74VCX16373A pinout, PI74VCX16373A application, or PI74VCX16373A equivalent, key selection criteria include 16-bit latch enable timing (tPLH/tPHL ≤ 5.1ns at VDD = 3.3V), 3-state output disable skew (tPZH/tPHZ ≤ 5.3ns), I/O voltage tolerance up to 3.6V, and TSSOP-48 package compatibility with 0.5mm pitch PCB layouts.
Technical Context
This device implements two independent 8-bit transparent latches, each controlled by dedicated Latch Enable (LE) inputs. When LE is HIGH, Q outputs follow D inputs; when LE goes LOW, outputs retain the last D value. Output Enable (OE) is active-low and fully decoupled from internal latch operation - enabling concurrent data retention and new input loading during high-impedance output states.
The PI74VCX16373A uses patented noise reduction circuitry to suppress ground bounce (VOLP < 0.6V) and output undershoot (VOHV > –0.6V) at VDD = 2.5V. Its I/O-tolerant architecture allows direct interfacing between 1.8V logic domains and 3.3V buses without external level shifters or pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 1.8V to 3.6V - enables operation across 1.8V core and 3.3V I/O voltage domains |
| I/O Voltage Tolerance | Up to 3.6V - permits connection to higher-voltage buses without level-shifting components |
| Output Drive Strength | ±24mA - sufficient to directly drive standard 50Ω transmission lines or multiple CMOS loads |
| tPLH / tPHL (max) | 5.1ns at VDD = 3.3V - supports 100+ MHz bus clocking with tight setup/hold margins |
| tPZH / tPHZ (max) | 5.3ns at VDD = 3.3V - ensures minimal skew between 3-state enable/disable transitions across all 16 outputs |
| Power-Off Behavior | High-impedance I/Os at VDD = 0V - prevents back-driving or contention during hot-swap or partial power-down |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
Pinout & Package
Package: 48-pin TSSOP (A), 12.6mm × 6.2mm body, 0.5mm lead pitch, Pb-free & RoHS-compliant (suffix 'E' variant available).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable control | Independent control of 8-bit output groups; OE assertion places Qx outputs in high-Z without affecting internal latch state |
| 1LE, 2LE | Active-high latch enable | Enables transparent pass-through of D inputs to Q outputs; latching occurs on LE falling edge |
| 1D1–1D8, 2D1–2D8 | Data inputs | Two independent 8-bit parallel input buses; tolerant to 3.6V signals regardless of VDD |
| 1Q1–1Q8, 2Q1–2Q8 | 3-state outputs | Bi-directional bus drivers with ±24mA drive; high-Z state eliminates bus loading during idle cycles |
| VDD (Pins 6, 14, 22, 30, 38, 46) | Power supply | Multiple distributed VDD pins reduce switching noise and improve PDN stability across wide bus |
| GND (Pins 3, 9, 17, 25, 33, 41) | Ground reference | Six GND pins provide low-inductance return paths for all 16 outputs and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Live insertion support | Power-off high-impedance I/Os prevent bus contention during hot-plug operations in modular backplanes |
| Noise reduction circuitry | Reduces ground bounce (VOLP < 0.6V) and VOH undershoot (VOHV > –0.6V), easing signal integrity validation |
| Balanced ±24mA drive | Eliminates need for external series resistors or termination networks on point-to-point or stubbed bus topologies |
| I/O voltage tolerance | 3.6V-tolerant inputs/outputs allow direct interface between 1.8V SoC peripherals and 3.3V legacy subsystems |
| Industrial temperature range | –40°C to +85°C operation ensures reliability in uncontrolled environments like factory automation controllers |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Isolating microcontroller GPIO banks from noisy 24V I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus latch buffering between 3.3V MCU and 5V/24V peripheral modules with synchronized enable control. Use Value: ±24mA drive and 3.6V I/O tolerance eliminate external level shifters and bus transceivers, reducing BOM count by 3 components per interface. |
Use Scenario: Managing shared CAN/LIN diagnostic bus access among multiple ECUs in centralized body control units. IC Role / Device Role / Timing Role: 16-bit transparent latch holding diagnostic command frames while enabling/disabling bus drivers via OE control. Use Value: Power-off high-Z behavior prevents bus contention during ECU reset sequences, ensuring uninterrupted communication on shared diagnostic lines. |
| Medical Imaging Data Acquisition Board | Test & Measurement Equipment I/O Expansion |
|
Use Scenario: Capturing parallel sensor data streams from analog front-end ADCs before serial conversion in portable ultrasound systems. IC Role / Device Role / Timing Role: Working register capturing 16-bit ADC output words synchronized to sampling clock edges via LE control. Use Value: 5.1ns propagation delay and sub-ns skew ensure precise time-aligned capture of multi-channel sensor data without inter-channel timing jitter. |
Use Scenario: Adding configurable digital I/O banks to benchtop oscilloscopes and logic analyzers with FPGA-based control planes. IC Role / Device Role / Timing Role: Buffer register isolating FPGA I/O pins from external DUT signal traces, with OE-controlled tri-state isolation during reconfiguration. Use Value: Live insertion capability allows hot-swapping of I/O daughterboards without powering down main instrument FPGA or memory subsystems. |
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 | Lower drive (±24mA same), but only 3.6V max VDD; no I/O tolerance above VDD - requires strict 3.3V-only operation | Lacks 1.8V system compatibility; unsuitable for mixed-voltage designs with 1.8V cores | Select if operating exclusively at 3.3V and cost sensitivity outweighs voltage flexibility needs |
| 74ALVC16373PW | Wider VDD range (1.65V–3.6V), but lower drive (±24mA same); no documented noise suppression circuitry | Higher VOLP/VOHV risk in dense PCB layouts; lacks Pericom's patented ground-bounce mitigation | Prefer for ultra-low-VDD applications below 1.8V where noise immunity is secondary to minimum supply voltage |
Compared with SN74LVC16373ADGGR and 74ALVC16373PW, the PI74VCX16373A uniquely combines 1.8V–3.6V operation, 3.6V I/O tolerance, and integrated noise suppression - making it the only choice for robust mixed-voltage bus interfacing where ground bounce must be minimized.
Availability
PI74VCX16373A is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automotive body control modules, medical imaging data acquisition boards, and test & measurement I/O expansion requiring stable component supply across extended temperature ranges and mixed-voltage architectures.
Supply support for PI74VCX16373A 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 specializing in high-speed interface, timing, and logic solutions for communications and computing infrastructure before its acquisition by Diodes Incorporated in 2017.
The PI74VCX family targets low-voltage, noise-sensitive bus interface applications in industrial, medical, and test equipment - emphasizing I/O tolerance, live insertion, and ground-bounce suppression over raw speed.
FAQ
What is the recommended pull-up resistor value for OE during power-up?
The datasheet specifies that OE should be tied to VDD via a pull-up resistor to guarantee high-impedance outputs at power-up. Minimum resistance is determined by the current-sinking capability of the driver; for typical 3.3V operation with ≤10µA leakage, a 10kΩ resistor satisfies this requirement while minimizing quiescent current draw.
Can PI74VCX16373A operate with VDD = 2.5V and interface to 3.3V logic?
Yes. The device supports VDD from 1.8V to 3.6V and has 3.6V-tolerant I/Os. At VDD = 2.5V, inputs accept 0–3.6V signals, and outputs drive to valid VOH/VOL levels compatible with 3.3V CMOS thresholds, enabling seamless level translation without external components.
Does OE affect internal latch state when asserted?
No. OE is strictly an output control signal and has no effect on internal latch operation. Data remains latched at Q outputs even when OE forces them into high-impedance; new D inputs can be loaded and latched while OE is active, enabling pipelined data staging.
Is PI74VCX16373A pin-compatible with older PI74FCT16373 devices?
No. Although both are 16-bit latches in 48-pin TSSOP packages, PI74VCX16373A uses different pin assignments for VDD/GND distribution (6×VDD, 6×GND) and separates OE/LE controls per 8-bit bank, whereas PI74FCT16373 uses shared OE/LE and fewer power pins - requiring PCB layout revision for replacement.
PI74VCX16373A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74VCX
- 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:
- 1.8V ~ 3.6V
- Independent Circuits:
- 2
- Delay Time - Propagation:
- 1.5ns
- Current - Output High, Low:
- 6mA, 6mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
PI74VCX16373A FAQ
1.How can I place an order for PI74VCX16373A through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74VCX16373A 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 PI74VCX16373A reliable?
The price and inventory of PI74VCX16373A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74VCX16373A is usually 5 days.
3.What payment methods are accepted for PI74VCX16373A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74VCX16373A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74VCX16373A?
PI74VCX16373A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74VCX16373A 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 PI74VCX16373A?
For technical support, including PI74VCX16373A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74VCX16373A requirements.
6.How does Aetrix verify that PI74VCX16373A is sourced from the original manufacturer or authorized distributors?
All PI74VCX16373A 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 PI74VCX16373A meets industry standards.
7.What is the process for return or replacement of PI74VCX16373A?
All PI74VCX16373A units undergo pre-shipment inspection (PSI). If there is an issue with PI74VCX16373A, 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 PI74VCX16373A part is unused and in its original packaging.
Return procedure for PI74VCX16373A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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