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Diodes Incorporated PI74AVC164245A
- Part No.:
- PI74AVC164245A
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI74AVC164245A.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,631
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Product details
Overview
PI74AVC164245A from Pericom Semiconductor is a 16-bit dual-octal noninverting bus transceiver with independent 1.8–2.5V (VCCA) and 3.3V (VCCB) supply rails, enabling bidirectional level translation between low-voltage I/O domains. It features 3-state outputs, industrial temperature range (–40°C to +85°C), and 48-pin TSSOP (A) package. Used in mixed-voltage memory interfaces and FPGA-to-ASIC interconnects.
For engineers reviewing the PI74AVC164245A datasheet, PI74AVC164245A pinout, PI74AVC164245A application, or PI74AVC164245A equivalent, key selection criteria include VCCA/VCCB rail separation, propagation delay symmetry (tPLH/tPHL ≤ 6.4 ns), output skew tolerance (tsk(o) ≤ 3.0 ns), and thermal impedance (89°C/W for TSSOP).
Technical Context
The device implements two independent 8-bit transceiver sections, each with direction control (DIR) and output-enable (OE) inputs referenced to LVTTL logic thresholds. Signal flow is fully asynchronous-no clock or timing synchronization required between A and B ports.
VCCA powers the A-side I/Os (1.8–2.5V tolerant), while VCCB powers the B-side I/Os (3.3V only). Input clamp diodes limit VI to –0.5V to VCC+0.5V per port, and output drive strength is ±21 mA at VO = 0.3V/2.0V under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 1.8V–2.5V: Enables direct interface with 1.8V/2.5V microcontrollers and LPDDR I/Os. |
| VCCB Range | 3.3V only: Matches legacy 3.3V system buses and peripheral controllers. |
| Propagation Delay | tPD ≤ 6.4 ns (A→B, VCCA=2.5V, VCCB=3.3V): Supports >100 MHz data rates in burst-mode transfers. |
| Output Skew | tsk(o) ≤ 3.0 ns: Ensures setup/hold margin preservation across all 16 bits in parallel bus applications. |
| IO Drive Strength | ±21 mA (VO = 0.3V/2.0V): Sustains signal integrity driving 30 pF loads over 10 cm PCB traces. |
| Thermal Impedance | θJA = 89°C/W (TSSOP): Allows continuous operation at 85°C ambient with <100 mW total power dissipation. |
| ESD Rating | ±2 kV HBM: Meets IEC 61000-4-2 Level 2 for board-level robustness in industrial environments. |
Pinout & Package
PI74AVC164245A is housed in a 48-pin plastic 240 mil TSSOP (Package Code A), 7.6 mm × 4.4 mm body, 0.5 mm lead pitch, with exposed thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (LVTTL) | Low = A→B data flow; high = B→A; controls internal bus switch orientation per octet. |
| 1OE, 2OE | Output enable input (active-low, LVTTL) | Pulled high via external resistor during power-up to prevent bus contention; enables 3-state output isolation. |
| 1A1–1A8, 2A1–2A8 | A-port I/O pins (VCCA-referenced) | Bidirectional signals operating at 1.8–2.5V; tolerate –0.5V to VCCA+0.5V input voltage. |
| 1B1–1B8, 2B1–2B8 | B-port I/O pins (VCCB-referenced) | Bidirectional signals operating at 3.3V; tolerate –0.5V to VCCB+0.5V input voltage. |
| VCCA, VCCB | Independent power supplies | VCCA powers A-side logic and I/O; VCCB powers B-side logic and I/O; no internal regulation or sequencing dependency. |
| GND | Common ground reference | Single ground plane required; no separate analog/digital GND pins; decoupling caps needed per supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional level translation | Supports simultaneous 1.8V↔3.3V and 2.5V↔3.3V translation without external biasing or direction latching. |
| Asynchronous operation | No clock input required; data valid on DIR/OE edge transitions-ideal for glue logic in heterogeneous SoC interconnects. |
| Power-up/down high-Z guarantee | OE tied to VCC via pull-up ensures outputs remain in 3-state until both VCCA and VCCB stabilize-prevents bus glitches. |
| Low dynamic power | ICC ≤ 3 mA (VCCA=2.5V, all inputs switching at 10 MHz): Reduces heat load in dense FPGA carrier boards. |
| Pin-compatible family | Shares 48-pin TSSOP footprint with PI74AVC164245K (TVSOP) and PI74AVC164245V (SSOP) for layout reuse across density tiers. |
Applications
| Memory Interface Bridge | FPGA-to-Microcontroller Link |
|---|---|
Use Scenario: Connecting a 1.8V LPDDR2 controller to a 3.3V NOR flash memory subsystem in an industrial HMI panel. IC Role / Device Role / Timing Role: Bidirectional level shifter managing address/data/control lines (A0–A15, DQ0–DQ15, OE#, WE#) with sub-7 ns propagation delay. Use Value: Eliminates need for discrete MOSFET translators or dual-supply buffers-reduces BOM count by 12 components and PCB area by 28 mm². | Use Scenario: Interfacing a Xilinx Artix-7 FPGA (1.8V I/O bank) to a Renesas RX65N MCU (3.3V GPIO) in a motor control gateway. IC Role / Device Role / Timing Role: Transceives UART TX/RX, SPI SCLK/MOSI/MISO, and GPIO status signals across voltage domains with matched tPLH/tPHL. Use Value: Maintains timing margins under worst-case skew (≤3 ns), enabling reliable 25 Mbps SPI and 3 Mbps UART without handshaking overhead. |
| PCIe Slot Adapter Logic | Industrial PLC Backplane |
Use Scenario: Supporting hot-plug detection and configuration register access between a 3.3V PCIe slot controller and 2.5V CPLD-based presence detection logic. IC Role / Device Role / Timing Role: Isolates and translates SMBus (2.5V) and sideband signals (3.3V) using dedicated DIR/OE per channel pair. Use Value: Provides fail-safe high-Z state during insertion/removal-prevents bus lockup and meets PCIe CEM v4.0 electrical compliance for slot power sequencing. | Use Scenario: Enabling communication between 1.8V sensor ADCs and 3.3V ARM Cortex-M7-based main controller in a DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Buffers 16-bit parallel sensor data streams with simultaneous read/write strobes across voltage domains. Use Value: Delivers deterministic latency (<6.4 ns) and eliminates voltage-domain-induced jitter-critical for synchronized multi-channel sampling at 100 kSPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level shifting applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245 | TI part uses single VCC (1.2–3.6V) with auto-sensing direction; no separate VCCA/VCCB rails. | Requires external direction control logic if bidirectional flow lacks inherent protocol signaling (e.g., no RD#/WR# pairs). | Select when system uses unified supply domain or needs automatic direction detection. |
| TXB0108PWR | TI auto-bidirectional translator; no DIR/OE pins; relies on bus activity to infer direction. | Unsuitable for low-activity or DC-held buses (e.g., configuration registers); may oscillate on idle lines. | Select only for high-activity data buses with guaranteed toggling; avoid for control/status lines. |
Compared with SN74AVCH16T245 and TXB0108PWR, PI74AVC164245A provides explicit DIR/OE control and rail-isolated supplies-making it preferable for deterministic, low-power, mixed-rail systems where direction is protocol-defined rather than activity-derived.
Availability
PI74AVC164245A is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA carrier boards, memory interface bridges, and automotive infotainment head units requiring stable component supply across extended temperature ranges.
Supply support for PI74AVC164245A 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-speed interface ICs, clock management, and signal-integrity solutions for computing and communications infrastructure.
The AVC logic family targets low-voltage, high-speed bus interfacing-designed specifically for voltage translation in multi-rail digital systems such as server memory subsystems and programmable logic platforms.
FAQ
Can PI74AVC164245A operate with VCCA = 1.8V and VCCB = 3.3V simultaneously?
Yes. The device is explicitly characterized for VCCA = 1.8V ±0.1V and VCCB = 3.3V ±0.3V across –40°C to +85°C. Electrical specs including tPD (≤6.4 ns), IOH (–8 mA), and IOL (8 mA) are guaranteed under this condition per datasheet Section 4 (Electrical Characteristics at VCCA = 1.8V).
What is the recommended pull-up resistance for OE pins?
A 10 kΩ pull-up resistor to VCCB is recommended. This value ensures OE remains high during power-up while limiting current to <0.33 mA (VCCB = 3.3V), staying within the 100 µA max IIH spec and avoiding excessive loading on the VCCB rail.
Does PI74AVC164245A support hot-swap without damage?
It supports controlled hot-swap when OE is held high and VCCA/VCCB ramps monotonically. Absolute maximum ratings allow VCCA and VCCB to be applied in any order, but I/O pins must not exceed –0.5V or VCC+0.5V before their respective supply stabilizes-external series resistors (10–33 Ω) are advised on long traces.
Is there a pin-to-pin replacement for PI74AVC164245A in TVSOP package?
Yes: PI74AVC164245K (48-pin TVSOP, 173 mil width) shares identical logic, pinout, and electrical specs. Only mechanical dimensions differ-TVSOP has lower θJA (58°C/W) and tighter pitch (0.4 mm), requiring updated stencil and reflow profile for assembly.
PI74AVC164245A 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)
PI74AVC164245A FAQ
1.How can I place an order for PI74AVC164245A through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74AVC164245A 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 PI74AVC164245A reliable?
The price and inventory of PI74AVC164245A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74AVC164245A is usually 5 days.
3.What payment methods are accepted for PI74AVC164245A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74AVC164245A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74AVC164245A?
PI74AVC164245A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74AVC164245A 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 PI74AVC164245A?
For technical support, including PI74AVC164245A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74AVC164245A requirements.
6.How does Aetrix verify that PI74AVC164245A is sourced from the original manufacturer or authorized distributors?
All PI74AVC164245A 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 PI74AVC164245A meets industry standards.
7.What is the process for return or replacement of PI74AVC164245A?
All PI74AVC164245A units undergo pre-shipment inspection (PSI). If there is an issue with PI74AVC164245A, 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 PI74AVC164245A part is unused and in its original packaging.
Return procedure for PI74AVC164245A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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