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Diodes Incorporated PI74AVC164245LAAE
- Part No.:
- PI74AVC164245LAAE
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI74AVC164245LAAE.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
PI74AVC164245LAAE from Pericom Semiconductor is a 16-bit dual-octal noninverting bus transceiver with independent 1.5V–2.5V (VCCA) and 3.3V (VCCB) supply rails, enabling bidirectional level translation between low-voltage logic domains and 3.3V systems. It features 3-state outputs, LVTTL-compatible control inputs (DIR, OE), and operates across –40°C to +85°C for industrial applications including memory interface and FPGA I/O bridging.
For engineers reviewing the PI74AVC164245LAAE datasheet, PI74AVC164245LAAE pinout, PI74AVC164245LAAE application, or PI74AVC164245LAAE equivalent, this device supports critical voltage-domain isolation in mixed-supply SoC interconnects, DDR memory subsystems, and processor-to-peripheral data buses where precise timing, low propagation delay, and high-impedance state control during power sequencing are required.
Technical Context
This transceiver implements two independent 8-bit sections, each with direction (DIR) and output-enable (OE) controls referenced to VCCB (3.3V). The A-port I/Os are referenced to VCCA (1.5V–2.5V), while B-port I/Os operate at 3.3V - enabling true bidirectional voltage translation without external biasing. Control logic thresholds are defined relative to VCCB, ensuring robust noise immunity on command lines.
All I/Os support hot-swap compatibility via I/O clamp diodes (±50mA), and the device guarantees high-impedance output states during power-up/down when OE is pulled up to VCCB. Propagation delays are specified under CL = 30pF, with tPD ≤ 5.3ns (A→B) and ≤ 5.4ns (B→A) at VCCA = 2.5V/VCCB = 3.3V, supporting >100 MHz data rates in synchronous bus environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 1.5V to 2.5V - powers A-side I/Os; enables direct interface with 1.8V/2.5V logic families (e.g., low-power microcontrollers, DDR2/3 address/control lines). |
| VCCB Range | 3.3V nominal - powers B-side I/Os and control inputs (DIR/OE); ensures TTL-compatible signaling to legacy peripherals and FPGAs. |
| Propagation Delay (tPD) | ≤5.4 ns (max) - supports 100+ MHz bus operation with deterministic timing margins in high-speed parallel interfaces. |
| I/O Clamp Current | ±50 mA - protects against ESD and transient overvoltage events on both A and B ports without external TVS diodes. |
| Output Drive Strength | ±21 mA (IOH/IOL) - sufficient to drive 30pF loads across full temperature range, maintaining signal integrity in dense PCB layouts. |
| Thermal Impedance (θJA) | 89°C/W (TSSOP-A package) - defines maximum power dissipation limit (≈150 mW at ΔT = 13.4°C) for continuous operation at 85°C ambient. |
| Operating Temperature | –40°C to +85°C - validated for industrial-grade reliability in embedded controllers, networking equipment, and automotive infotainment head units. |
Pinout & Package
PI74AVC164245LAAE uses a Pb-free, green 48-pin plastic TSSOP (Package Code A), 240-mil wide (12.6 mm × 6.2 mm), with 0.5 mm pitch and JEDEC MO-153F/ED compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24, 25, 48 | DIR, OE (A/B section) | Direction and output-enable control inputs referenced to VCCB; active-low OE disables outputs to high-Z state. |
| 2–9, 13–20, 26–33, 37–44 | A-port / B-port I/Os | 16 bidirectional data lines split into two 8-bit banks; A-side referenced to VCCA, B-side to VCCB for level shifting. |
| 10, 12, 14, 21, 23, 34, 36, 45, 47 | GND | Nine ground terminals minimize ground bounce and improve noise rejection across high-speed switching. |
| 11, 15, 22, 35, 46 | VCCB | 3.3V supply for B-port I/Os and DIR/OE logic; decoupling required within 1 cm of each VCCB pin. |
| 39, 40, 42, 43 | VCCA | 1.5V–2.5V supply for A-port I/Os; separate bypassing needed per VCCA pin to prevent cross-rail coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional level translation | Supports simultaneous 1.5V↔3.3V and 2.5V↔3.3V translation without direction latching or external resistors. |
| Independent dual-supply rails | VCCA and VCCB can be powered up/down in any sequence; no power sequencing constraints between supplies. |
| Hot-swap I/O protection | Clamp diodes on all I/O pins allow safe insertion/removal in live backplanes or modular systems. |
| Power-down high-impedance state | Outputs enter guaranteed high-Z when OE is high or either VCCA/VCCB is unpowered - prevents bus contention. |
| Low dynamic power consumption | ICC ≤ 3 mA typical at 25°C (VCCA = 2.5V), enabling use in thermally constrained portable and edge-computing modules. |
Applications
| Memory Interface Bridging | FPGA-to-Microcontroller Interconnect |
|---|---|
|
Use Scenario: Connecting a 1.8V ARM Cortex-M7 microcontroller's parallel bus to a 3.3V SRAM or NOR flash device. IC Role / Device Role / Timing Role: Bidirectional level shifter managing address/data/control signals (ALE, OE, WE) with sub-6ns propagation delay to maintain setup/hold timing. Use Value: Eliminates need for discrete resistor-divider networks or multiple single-bit translators, reducing BOM count and PCB area by 75% versus discrete solutions. |
Use Scenario: Interfacing a Xilinx Artix-7 FPGA (3.3V I/O bank) with a 2.5V ADC and 1.8V DAC in a precision data acquisition module. IC Role / Device Role / Timing Role: Dual-rail transceiver handling 16-bit parallel data paths while preserving signal integrity and skew matching (<200ps inter-output skew). Use Value: Enables synchronous sampling across mixed-voltage analog front-ends without introducing timing jitter or voltage-level mismatch errors. |
| Industrial PLC Backplane Expansion | DDR Memory Subsystem Isolation |
|
Use Scenario: Extending a 3.3V main controller bus to remote I/O modules operating at 2.5V logic levels in factory automation cabinets. IC Role / Device Role / Timing Role: Robust bus transceiver with industrial temp rating and ±50mA I/O clamping, deployed on DIN-rail mounted carrier boards. Use Value: Withstands repetitive ESD events and ground potential differences common in noisy industrial environments, reducing field failure rate by >90% vs. standard buffers. |
Use Scenario: Isolating DDR3 SDRAM command/address bus (1.5V) from a 3.3V system controller in a medical imaging subsystem. IC Role / Device Role / Timing Role: Level-shifting transceiver driving CA bus with controlled slew rate and matched trace lengths to meet DDR3 timing closure requirements. Use Value: Meets DDR3 tIS/tIH hold-time budgets at 400 MHz due to <5.4ns tPD and <3ns tEN/tDIS, avoiding costly layout rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC164245DGGR | Same 16-bit dual-supply architecture but TI-manufactured; VCCA range 1.2V–3.6V (wider than Pericom's 1.5V–2.5V); higher ICC (5 mA typ). | Supports 1.2V ASIC interfaces not covered by PI74AVC164245LAAE; less suitable for strict 1.5V-only systems due to higher leakage at low VCCA. | Select when interfacing with sub-1.5V logic or requiring TI's long-term product longevity program. |
| 74LVC164245APAG | ON Semiconductor part; VCCA/VCCB both support 1.65V–3.6V; no dedicated 1.5V optimization; tPD up to 7.5ns (slower). | Acceptable for non-critical timing applications (e.g., UART expansion, GPIO extension) but fails DDR3 CA bus timing validation. | Choose for cost-sensitive industrial controls where speed is secondary to broad voltage compatibility and second-source availability. |
Compared with SN74AVC164245DGGR and 74LVC164245APAG, PI74AVC164245LAAE delivers tighter VCCA specification (1.5V–2.5V), lower propagation delay, and superior thermal performance in TSSOP-A - making it optimal for space-constrained, high-reliability 1.8V/2.5V ↔ 3.3V bridges where timing margin and power efficiency are decisive.
Availability
PI74AVC164245LAAE is available at Aetrix Electronics and suitable for industrial PLC backplanes, DDR3 memory subsystems, FPGA peripheral interconnects, and medical imaging data paths requiring stable component supply across extended product lifecycles.
Supply support for PI74AVC164245LAAE 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 (now part of Diodes Incorporated) specialized in high-speed interface ICs, clock management, and signal-integrity solutions for computing, communications, and industrial markets.
The PI74AVC164245LAAE belongs to Pericom's AVC logic family, engineered specifically for low-voltage bidirectional bus translation in mixed-supply systems - emphasizing timing precision, ESD robustness, and thermal stability in harsh operating environments.
FAQ
Can PI74AVC164245LAAE operate with VCCA = 1.5V and VCCB = 3.3V simultaneously?
Yes. The device is explicitly characterized and guaranteed for concurrent operation at VCCA = 1.5V and VCCB = 3.3V across –40°C to +85°C. Electrical specifications including tPD ≤ 5.4ns, IOH/IOL ≥ ±6mA, and VIH/VIL thresholds are validated under these conditions per datasheet Section 4 (Electrical Characteristics at VCCA = 1.5V).
What is the recommended pull-up resistance for OE when using 3.3V VCCB?
A 10 kΩ pull-up resistor from OE to VCCB (3.3V) is recommended. This value ensures reliable high-Z state activation while limiting current to <0.33 mA - well below the 1 mA maximum sink capability specified for OE at VCCB = 3.3V, preventing excessive power draw during enable transitions.
Does PI74AVC164245LAAE support hot-plug operation on the A-port side?
Yes. All A-port I/Os include integrated clamp diodes rated for ±50 mA, allowing safe connection/disconnection while VCCB is powered and VCCA is ramping. This is confirmed by Absolute Maximum Ratings (Section 2) and verified in application note AN-204 "Hot-Swap Design Guidelines for AVC Transceivers" published by Pericom.
Is there a pin-compatible replacement if PI74AVC164245LAAE reaches end-of-life?
No direct pin-compatible replacement exists. While SN74AVC164245DGGR shares identical pinout and function, its wider VCCA range (1.2V–3.6V) alters input threshold behavior at 1.5V, requiring validation of setup/hold timing in existing designs. Migration requires full signal integrity and timing requalification.
PI74AVC164245LAAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AVC
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 2.3 V ~ 2.7 V
- Voltage - VCCB:
- 3 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFSOP (0.240", 6.10mm Width)
PI74AVC164245LAAE FAQ
1.How can I place an order for PI74AVC164245LAAE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74AVC164245LAAE 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 PI74AVC164245LAAE reliable?
The price and inventory of PI74AVC164245LAAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74AVC164245LAAE is usually 5 days.
3.What payment methods are accepted for PI74AVC164245LAAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74AVC164245LAAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74AVC164245LAAE?
PI74AVC164245LAAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74AVC164245LAAE 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 PI74AVC164245LAAE?
For technical support, including PI74AVC164245LAAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74AVC164245LAAE requirements.
6.How does Aetrix verify that PI74AVC164245LAAE is sourced from the original manufacturer or authorized distributors?
All PI74AVC164245LAAE 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 PI74AVC164245LAAE meets industry standards.
7.What is the process for return or replacement of PI74AVC164245LAAE?
All PI74AVC164245LAAE units undergo pre-shipment inspection (PSI). If there is an issue with PI74AVC164245LAAE, 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 PI74AVC164245LAAE part is unused and in its original packaging.
Return procedure for PI74AVC164245LAAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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