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Diodes Incorporated PI74LPT16374AAE
- Part No.:
- PI74LPT16374AAE
- Manufacturer:
- Diodes Incorporated
- Category:
- Shift Registers
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PI74LPT16374AAE.pdf
- Description:
- IC 16-BIT OCTAL REG 48 TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,439
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Product details
Overview
PI74LPT16374AAE from Pericom Semiconductor is a 3.3V, 16-bit D-type register with 3-state outputs, dual 8-bit or unified 16-bit operation via independent clock and output-enable controls, ±24 mA drive strength, 5V-tolerant inputs, and industrial temperature range (–40°C to +85°C). It serves as a level-translating data latch in mixed-voltage bus interfaces between 3.3V logic and legacy 5V systems.
For engineers reviewing the PI74LPT16374AAE datasheet, PI74LPT16374AAE pinout, PI74LPT16374AAE application, or PI74LPT16374AAE equivalent, key selection criteria include 5V-tolerant input compatibility, 3-state output timing (tPZH ≤ 7.2 ns), low ground bounce design, hysteresis-enabled noise immunity, and TSSOP-48 package footprint for high-density PCB layouts.
Technical Context
The PI74LPT16374AAE implements two independent 8-bit register banks sharing no internal signal coupling-each bank has dedicated xCLK and xOE controls, enabling asynchronous latching of separate 8-bit data streams. Its dual-bank architecture supports time-multiplexed bus buffering without inter-bank skew propagation.
All inputs feature Schmitt-trigger hysteresis (150 mV typical), and outputs deliver balanced sourcing/sinking (–24 mA / +24 mA at VOH/VOL = 2.4 V / 0.4 V), ensuring robust signal integrity across noisy industrial backplanes. The device operates across VCC = 2.7–3.6 V while accepting 0–5.5 V input voltages, eliminating external level shifters in 3.3/5.0 V mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Ensures stable operation under industrial rail tolerances and brown-out conditions. |
| Input Voltage Range | –0.5 V to +7.0 V - Supports direct connection to 5V buses without clamping diodes or resistors. |
| tPLH / tPHL | 2.0 ns to 7.0 ns - Enables reliable 140+ MHz register operation with margin for trace delays. |
| IOH / IOL | –24 mA / +24 mA - Drives standard TTL loads and multiple CMOS inputs without fanout limitation. |
| VIH / VIL | 2.2 V / 0.8 V - Guarantees clean logic recognition across full temperature and voltage range. |
| ICC Quiescent | 0.1 μA to 10 μA - Minimizes standby power in battery-backed or always-on control modules. |
| Operating Temp | –40°C to +85°C - Qualified for deployment in uncontrolled industrial enclosures and automotive under-hood proximity. |
Pinout & Package
PI74LPT16374AAE is housed in a Pb-free, green-compliant 48-pin TSSOP (Package Code A), 240-mil wide (6.0–6.2 mm body width), with 0.5 mm pitch and dual-row gull-wing leads. Pin 1 is marked by a beveled corner; pins are arranged with distributed VCC/GND pairs (pins 7, 18, 31, 42, 45) to suppress simultaneous switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low 3-state output enable | Independent control per 8-bit bank; enables dynamic bus arbitration without clock gating. |
| 1CLK, 2CLK | Positive-edge clock inputs | Edge-triggered capture of D-inputs; allows asynchronous latching of two data channels. |
| 1D0–1D7, 2D0–2D7 | Data inputs | 5V-tolerant with hysteresis; accept TTL/CMOS levels regardless of VCC supply state. |
| 1O0–1O7, 2O0–2O7 | 3-state outputs | High-impedance state activated when OE = HIGH; supports shared-bus contention avoidance. |
| VCC (pins 7,18,31,42) | Power supply | Multiple distributed VCC pins reduce IR drop and improve transient response during output switching. |
| GND (pins 4,10,15,21,39,45) | Ground reference | Six GND pins minimize ground bounce and provide low-inductance return paths for all 16 outputs. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Accepts 0–5.5 V signals while powered from 3.3 V, eliminating external level translators in mixed-voltage designs. |
| Low ground bounce outputs | Distributed GND pins and balanced drive reduce ΔV noise on shared ground planes by >40% vs. legacy 16-bit registers. |
| Hysteresis on all inputs | 150 mV typical hysteresis rejects <10 ns noise spikes common in industrial motor-drive or relay-switching environments. |
| Pin-compatible with industry standards | Matches double-density pinout of 74LVT16374 and 74LCX16374, enabling drop-in replacement in existing layouts. |
| Industrial temperature range | Validated operation from –40°C to +85°C ensures reliability in factory automation PLCs and outdoor telecom equipment. |
Applications
| Industrial Bus Interface | Legacy System Upgrades |
|---|---|
Use Scenario: Interfacing a 3.3V FPGA I/O bank to a 5V ISA-style parallel bus in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating 16-bit data latch synchronizing writes from FPGA to legacy peripheral registers. Use Value: Eliminates discrete resistor-divider networks and reduces BOM count by one IC per bus segment. | Use Scenario: Retrofitting 3.3V microcontroller-based sensor nodes into aging 5V data acquisition racks. IC Role / Device Role / Timing Role: Bidirectional data buffer isolating MCU GPIOs from 5V bus transients while preserving timing alignment. Use Value: Maintains 100% functional compatibility with original 74LVT16374-based schematics and firmware timing. |
| High-Density Backplane Buffer | Automotive Diagnostic Interface |
Use Scenario: Driving multiple 16-bit address/data lines across a 12-layer backplane in modular test equipment. IC Role / Device Role / Timing Role: Low-skew (≤0.5 ns) register staging data before transmission to downstream ASICs. Use Value: Achieves deterministic setup/hold margins (<2 ns) across 15 cm traces due to matched propagation delay. | Use Scenario: Isolating a 3.3V CAN controller's GPIOs from 5V OBD-II diagnostic bus signaling in vehicle ECU redesigns. IC Role / Device Role / Timing Role: Transient-protected data latch capturing diagnostic command bytes prior to CAN frame assembly. Use Value: Withstands 2000V HBM ESD events and survives load-dump surges up to 7.0 V on I/O pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16374ADGGR | 3.3V-only inputs (no 5V tolerance); lower drive (–24/+24 mA same, but VOH drops to 2.2 V at 24 mA) | Requires external level shifters for 5V bus interfacing; unsuitable for mixed-voltage translation | Select only if system uses uniform 3.3V logic and board space favors 0.5-mm-pitch VQFN over TSSOP. |
| 74ALVC16374MTD | Higher ICCD (up to 4.7 mA at 2.5 MHz, 16-bit toggle); no hysteresis on inputs | Lacks noise immunity in electrically noisy engine compartments; higher dynamic power limits battery life | Prefer only for cost-sensitive consumer applications where EMI is controlled and thermal budget permits. |
Compared with SN74LVC16374ADGGR and 74ALVC16374MTD, PI74LPT16374AAE uniquely combines 5V-tolerant inputs, input hysteresis, and distributed power/ground pins-making it the sole choice for robust, mixed-voltage industrial bus isolation without redesign.
Availability
PI74LPT16374AAE is available at Aetrix Electronics and suitable for industrial bus interface, legacy system upgrades, high-density backplane buffering, and automotive diagnostic interface applications requiring stable component supply and long-term lifecycle support.
Supply support for PI74LPT16374AAE 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 products remain widely deployed in industrial and communications infrastructure.
The PI74LPT16374 belongs to Pericom's LPT (Low Power Tolerant) family, engineered specifically for seamless voltage-domain bridging in mixed-signal systems where 3.3V logic must coexist with legacy 5V peripherals.
FAQ
Can PI74LPT16374AAE operate with VCC = 2.5V?
No. The device is specified for VCC = 2.7 V to 3.6 V only. At 2.5 V, VIH minimum falls below guaranteed logic-high threshold (2.2 V), risking metastability and increased static current leakage. Operation outside this range voids parametric guarantees and may cause latch-up under transient conditions.
What is the maximum clock frequency supported by PI74LPT16374AAE?
The maximum reliable clock frequency is determined by tW (clock pulse width) ≥ 7.0 ns (min) and tPLH/tPHL ≤ 7.0 ns (max), supporting sustained operation up to 140 MHz with 50% duty cycle. For guaranteed timing closure in synchronous designs, Derate to ≤100 MHz when accounting for PCB trace skew and temperature variation.
Does PI74LPT16374AAE require external pull-up resistors on xOE pins?
No. xOE pins have internal weak pull-downs (IIL ≤ ±1 μA at GND), and are active-low with TTL-compatible thresholds. Pull-ups are unnecessary unless open-drain bus arbitration or fail-safe high-impedance default is required-then use 10 kΩ to VCC.
How does the PI74LPT16374AAE handle simultaneous switching of all 16 outputs?
It mitigates simultaneous switching noise via six dedicated GND pins and four VCC pins distributed across the package perimeter, reducing peak ground bounce to <0.3 V under worst-case 24 mA switching. This meets JEDEC JESD8-12B noise limits for industrial backplane applications without added decoupling beyond standard 0.1 μF per VCC pin.
PI74LPT16374AAE 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:
- Register, D-Type
- Output Type:
- Tri-State
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Function:
- Universal
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
PI74LPT16374AAE FAQ
1.How can I place an order for PI74LPT16374AAE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74LPT16374AAE 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 PI74LPT16374AAE reliable?
The price and inventory of PI74LPT16374AAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74LPT16374AAE is usually 5 days.
3.What payment methods are accepted for PI74LPT16374AAE?
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4.How is shipping managed for PI74LPT16374AAE?
PI74LPT16374AAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74LPT16374AAE 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 PI74LPT16374AAE?
For technical support, including PI74LPT16374AAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74LPT16374AAE requirements.
6.How does Aetrix verify that PI74LPT16374AAE is sourced from the original manufacturer or authorized distributors?
All PI74LPT16374AAE 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 PI74LPT16374AAE meets industry standards.
7.What is the process for return or replacement of PI74LPT16374AAE?
All PI74LPT16374AAE units undergo pre-shipment inspection (PSI). If there is an issue with PI74LPT16374AAE, 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 PI74LPT16374AAE part is unused and in its original packaging.
Return procedure for PI74LPT16374AAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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