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Diodes Incorporated PI74LPT16245AAEX
- Part No.:
- PI74LPT16245AAEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PI74LPT16245AAEX.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,284
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Product details
Overview
PI74LPT16245AAEX from Pericom Semiconductor is a 16-bit bidirectional voltage-level translating transceiver supporting asynchronous two-way bus communication between 3.3V and 5.0V domains. It features dual 8-bit or unified 16-bit operation via independent DIR/OE controls, 24 mA balanced output drive, and industrial temperature range (–40°C to +85°C), deployed in mixed-voltage backplane interfaces and FPGA I/O expansion.
For engineers reviewing the PI74LPT16245AAEX datasheet, PI74LPT16245AAEX pinout, PI74LPT16245AAEX application, or PI74LPT16245AAEX equivalent, key selection criteria include 3.3V/5V tolerance on all I/Os, low ground bounce outputs, hysteresis on inputs, and compatibility with LCX™/LVT™ logic families in high-noise industrial systems.
Technical Context
The PI74LPT16245AAEX implements dual independent direction-control paths (1DIR/2DIR) and output-enable inputs (1OE/2OE), enabling flexible partitioning into two 8-bit transceivers or one 16-bit unit. Its 5V-tolerant I/O architecture allows direct connection to 5V buses while powered from 3.3V VCC, eliminating external level-shifting components.
It uses advanced low-power CMOS with distributed VCC/GND pins and multiple center ground pins to suppress switching noise. Input hysteresis (150 mV) enhances noise immunity, and propagation delays are guaranteed ≤4.1 ns (LPT16245C grade) at 3.3V with 50 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.7V to 3.6V - Enables stable operation in 3.3V systems with ±10% rail tolerance. |
| I/O Voltage Tolerance | –0.5V to +7.0V - Supports 5V-tolerant inputs/outputs without clamping diodes or external protection. |
| Output Drive Strength | ±24 mA - Delivers robust signal integrity across noisy backplanes and long traces. |
| Propagation Delay | ≤4.1 ns (max, LPT16245C) - Meets timing budgets for 100+ MHz bus handshaking. |
| Input Hysteresis | 150 mV - Rejects common-mode noise on shared control lines like DIR/OE in industrial environments. |
| Operating Temperature | –40°C to +85°C - Qualified for deployment in uncontrolled industrial enclosures and outdoor edge nodes. |
| Power Dissipation | 1.0 W (max) - Allows use in dense PCB layouts without forced air cooling. |
Pinout & Package
PI74LPT16245AAEX is packaged in a Pb-free, green 48-pin 240-mil wide thin plastic TSSOP (Package Code A), with 0.5 mm pitch, JEDEC MO-153F/ED compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input | Determines data flow direction per 8-bit bank (A→B or B→A); TTL-compatible threshold. |
| 1OE, 2OE | Output Enable (Active LOW) | Places corresponding A/B port in high-impedance state; enables bus sharing and hot-swap isolation. |
| 1A0–1A7, 2A0–2A7 | Side A I/O Pins | 3.3V-referenced bidirectional ports; tolerate up to 5V input, drive 3.3V or 5V loads. |
| 1B0–1B7, 2B0–2B7 | Side B I/O Pins | 5V-tolerant bidirectional ports; interface directly to legacy 5V logic or microcontrollers. |
| VCC (Pins 7, 18, 31, 42) | Power Supply | Single 3.3V supply powers entire device; multiple VCC pins reduce IR drop and improve PSRR. |
| GND (Pins 4, 10, 15, 21, 34, 39, 45) | Ground Reference | Seven dedicated GND pins minimize ground bounce and provide low-inductance return paths. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-Tolerant Mixed-Signal Operation | Enables direct interfacing between 3.3V FPGAs and 5V peripherals without discrete level shifters. |
| Balanced ±24 mA Output Drive | Ensures fast edge rates and clean signal transitions across 50 Ω transmission lines. |
| Low Ground Bounce Outputs | Reduces simultaneous switching noise (SSN) in multi-bit parallel bus applications. |
| Hysteresis on All Inputs | Improves noise margin on control signals (DIR/OE) in electrically noisy industrial cabinets. |
| Pb-Free & Green Packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Interfacing a 3.3V FPGA to legacy 5V peripheral cards in modular PLC racks. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator with independent 8-bit control. Use Value: Eliminates need for eight discrete level shifters, reducing BOM count and PCB area by >60%. | Use Scenario: Extending FPGA GPIO banks to drive 5V sensors and actuators in factory automation controllers. IC Role / Device Role / Timing Role: Level-translating transceiver with 24 mA drive capability for direct sensor excitation. Use Value: Supports 100+ kHz PWM outputs to 5V solenoids without external buffer stages. |
| Embedded Communication Bridge | Mixed-Voltage Memory Subsystem |
Use Scenario: Connecting a 3.3V ARM SoC to a 5V UART-to-USB bridge IC in medical diagnostic equipment. IC Role / Device Role / Timing Role: Asynchronous bidirectional data path with independent OE/DIR per channel. Use Value: Guarantees <4.1 ns propagation delay for real-time serial protocol handshaking. | Use Scenario: Interfacing a 3.3V microcontroller to 5V SRAM or Flash memory in avionics data loggers. IC Role / Device Role / Timing Role: High-drive, low-skew transceiver for address/data bus translation. Use Value: Output skew ≤0.5 ns ensures setup/hold timing margins across full 16-bit bus width. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage-level translating transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245A | 3.3V-only I/O tolerance (no 5V tolerance); max VCC = 3.6V; lower drive (±24 mA only at VCC ≥ 3.0V) | Requires external clamping for 5V bus connections; unsuitable for direct 5V interface | Select when system operates exclusively at 3.3V and cost is prioritized over mixed-voltage flexibility. |
| 74ALVC16245 | Higher speed (tPD ≤ 3.3 ns), but narrower VCC range (2.3V–3.6V); no 5V-tolerant I/O | Limited to low-voltage-only designs; lacks industrial temp rating (only –40°C to +85°C in selected grades) | Choose for high-speed 3.3V-only systems where propagation delay is critical and 5V interoperability is unnecessary. |
Compared with SN74LVC16245A and 74ALVC16245, PI74LPT16245AAEX uniquely supports true 5V-tolerant I/O from a 3.3V supply-enabling drop-in replacement in legacy 5V systems without redesign, while maintaining industrial temperature compliance and low ground bounce.
Availability
PI74LPT16245AAEX is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, embedded communication bridges, and mixed-voltage memory subsystems requiring stable component supply across extended product lifecycles.
Supply support for PI74LPT16245AAEX 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 (acquired by Diodes Incorporated in 2016) specialized in high-performance interface, timing, and signal-integrity solutions for communications, computing, and industrial markets.
The PI74LPT16245 belongs to Pericom's LPT (Low-Power Transceiver) family, engineered specifically for low-noise, mixed-voltage bus bridging in harsh industrial and telecom infrastructure environments.
FAQ
What is the maximum capacitive load the PI74LPT16245AAEX can drive reliably?
The device is characterized for CL = 50 pF with RL = 500 Ω, and its ±24 mA drive strength supports heavier loads up to 70 pF while maintaining <5 ns propagation delay and monotonic edges. Driving >70 pF requires verifying signal integrity via IBIS simulation or bench testing with actual trace impedance.
Can PI74LPT16245AAEX operate with VCC = 2.7V while interfacing to a 5V bus?
Yes. The device guarantees 5V-tolerant inputs and outputs across its full VCC range (2.7V–3.6V). At 2.7V VCC, VOH remains ≥2.0V (IOL = 24 mA), sufficient to meet VIH thresholds of standard 5V TTL and CMOS loads, confirmed in DC Electrical Characteristics tables.
Does PI74LPT16245AAEX require external pull-up or pull-down resistors on DIR/OE pins?
No. Internal weak pull-downs are not present, but the inputs have hysteresis and TTL-compatible thresholds (VIH = 2.0V min). For robust noise immunity in floating-control scenarios, a 10 kΩ pull-down on each DIR/OE is recommended-per design practices in Pericom Application Note AN-322 for mixed-signal transceivers.
How does the PI74LPT16245AAEX handle simultaneous switching noise (SSN)?
It mitigates SSN via seven dedicated GND pins, distributed VCC pins, and low-ground-bounce output architecture. Layout guidelines in the datasheet specify minimum 20-mil power/ground plane clearance and recommend stitching vias within 1 mm of each GND pin to contain return current loops and limit ΔI/Δt-induced noise.
PI74LPT16245AAEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LPT
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
PI74LPT16245AAEX FAQ
1.How can I place an order for PI74LPT16245AAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74LPT16245AAEX 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 PI74LPT16245AAEX reliable?
The price and inventory of PI74LPT16245AAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74LPT16245AAEX is usually 5 days.
3.What payment methods are accepted for PI74LPT16245AAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74LPT16245AAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74LPT16245AAEX?
PI74LPT16245AAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74LPT16245AAEX 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 PI74LPT16245AAEX?
For technical support, including PI74LPT16245AAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74LPT16245AAEX requirements.
6.How does Aetrix verify that PI74LPT16245AAEX is sourced from the original manufacturer or authorized distributors?
All PI74LPT16245AAEX 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 PI74LPT16245AAEX meets industry standards.
7.What is the process for return or replacement of PI74LPT16245AAEX?
All PI74LPT16245AAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI74LPT16245AAEX, 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 PI74LPT16245AAEX part is unused and in its original packaging.
Return procedure for PI74LPT16245AAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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