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Diodes Incorporated PI74AUC164245AE
- Part No.:
- PI74AUC164245AE
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI74AUC164245AE.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,121
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Product details
Overview
PI74AUC164245AE from Pericom Semiconductor is a 16-bit dual-octal noninverting bus transceiver with independent VCCA (0.8–2.7V) and VCCB (0.8–2.7V) rails, enabling bidirectional level translation between mismatched voltage domains. It delivers ±9mA drive at 2.3V, supports IOFF partial power-down, and operates from –40°C to +85°C in industrial systems requiring low-voltage interconnects such as DDR memory interfaces and FPGA I/O bridging.
For engineers reviewing the PI74AUC164245AE datasheet, PI74AUC164245AE pinout, PI74AUC164245AE application, or PI74AUC164245AE equivalent, this device is selected for precise 0.8V–2.7V scalable translation, sub-3ns propagation delay at 2.5V, and robust 2000V HBM ESD protection - critical when integrating mixed-voltage SoCs, microcontrollers, and peripheral buses.
Technical Context
The PI74AUC164245AE implements dual-rail asynchronous bidirectional translation: A-port signals (VCCA-referenced) drive B-port outputs (VCCB-referenced) or vice versa, controlled by DIR and OE inputs referenced solely to VCCA. Its IOFF circuit actively disables outputs during power-down, blocking reverse current flow even when one rail is unpowered.
Each 8-bit section features independent DIR and OE controls (1DIR/1OE for first octet, 2DIR/2OE for second), allowing segmented bus isolation. Output enable is active-low, and all control pins tolerate input voltages up to 3.6V regardless of VCCA, simplifying interface with higher-voltage logic supervisors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Range (VCCA/VCCB) | 0.8V to 2.7V - enables direct interfacing between 0.8V ASIC cores and 1.8V/2.5V peripherals without external level-shifters. |
| Drive Strength | ±9mA at 2.3V - sufficient to drive 15pF loads with <3ns tPD, supporting high-speed DDR2/DDR3 command/address bus translation. |
| Propagation Delay (tPD) | 2.2ns (A→B, VCCA=2.5V, VCCB=2.5V) - ensures timing-critical bidirectional data paths meet sub-5ns setup/hold windows. |
| IOFF Current | ±10µA max - guarantees bus isolation during partial power-down, preventing backfeed into powered-down subsystems. |
| ESD Protection | 2000V HBM, 200V MM - exceeds JEDEC standards for board-level handling and system-level surge immunity in industrial environments. |
| Operating Temperature | –40°C to +85°C - validated for continuous operation in automotive body-control modules and industrial PLC I/O cards. |
| Power Dissipation Cap. (Cpd) | 3pF (VCCA), 14pF (VCCB) - low dynamic capacitance minimizes switching noise and supply current spikes in dense PCB layouts. |
Pinout & Package
PI74AUC164245AE is housed in a Pb-free & Green 48-pin TSSOP (240-mil width, JEDEC MO-153), with 0.5mm pitch and 12.6mm × 6.2mm footprint. Thermal resistance θJA = 104°C/W enables operation at full load without forced airflow in enclosed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction Control Input (VCCA-referenced) | Active-HIGH signal selecting data flow direction per octet: HIGH = A→B, LOW = B→A. |
| 1OE, 2OE | Output Enable Input (Active-LOW, VCCA-referenced) | Disables both A- and B-side outputs to high-impedance state, isolating buses during reset or sleep modes. |
| 1A1–1A8, 2A1–2A8 | A-port I/O (VCCA-referenced) | 8-bit bidirectional data lines tied to lower-voltage domain (e.g., 0.8V/1.2V processor I/O). |
| 1B1–1B8, 2B1–2B8 | B-port I/O (VCCB-referenced) | 8-bit bidirectional data lines tied to higher-voltage domain (e.g., 1.8V/2.5V memory or sensor interface). |
| VCCA, VCCB | Independent Power Rails | VCCA powers control logic and A-port I/O; VCCB powers B-port I/O - enables true dual-supply translation. |
| GND | Digital Ground Reference | Common return path for both supply domains; requires separate ground plane stitching to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Scalable Dual-Rail Translation | Supports 0.8V ↔ 1.2V, 0.8V ↔ 1.8V, 1.2V ↔ 2.5V, etc., eliminating need for multiple discrete translators in multi-voltage systems. |
| IOFF Partial Power-Down | Outputs automatically enter high-Z when either VCCA or VCCB = 0V, preventing damaging current backflow in hot-swap or sleep-mode applications. |
| Low-Voltage Core Compatibility | Guaranteed operation down to 0.8V VCCA/VCCB - essential for interfacing with advanced 28nm/16nm SoCs and ultra-low-power MCUs. |
| Fast Enable/Disable Timing | tEN = 2.6ns, tDIS = 2.9ns (VCCA=2.5V) - enables rapid bus arbitration and dynamic reconfiguration in real-time control loops. |
| Pb-Free & Green Packaging | RoHS-compliant TSSOP with halogen-free molding compound - meets IPC-1752A reporting requirements for Tier-1 automotive and industrial OEMs. |
Applications
| DDR Memory Interface | FPGA I/O Bridging |
|---|---|
Use Scenario: Translating command/address signals between a 1.2V DDR3L controller and 1.5V DDR3 SDRAM. IC Role / Device Role / Timing Role: Bidirectional level shifter managing CK, CKE, CS#, and address bus with sub-3ns skew control. Use Value: Eliminates external resistive dividers or dedicated DDR translators, reducing BOM count and PCB area while maintaining JEDEC timing margins. |
Use Scenario: Connecting a 0.8V FPGA core I/O bank to 1.8V industrial sensors and ADCs. IC Role / Device Role / Timing Role: Voltage-domain translator enabling direct pin-to-pin interface without external biasing or level-shifting ICs. Use Value: Reduces design complexity and signal integrity risk by providing matched trace-length routing and deterministic propagation delay across all 16 bits. |
| Microcontroller Peripheral Expansion | Automotive Body Control Module |
Use Scenario: Extending GPIO count of a 1.8V ARM Cortex-M4 MCU to drive 2.5V display drivers and UART transceivers. IC Role / Device Role / Timing Role: Configurable bus transceiver enabling software-controlled direction and output disable for shared data lines. Use Value: Allows single MCU port to serve multiple peripherals via time-multiplexed access, cutting required MCU pins by 50%. |
Use Scenario: Isolating LIN bus transceiver I/O (12V tolerant) from 3.3V microcontroller logic in door module ECUs. IC Role / Device Role / Timing Role: Level-shifting buffer with IOFF ensuring LIN bus remains isolated during MCU deep-sleep (VCCA = 0V). Use Value: Meets ISO 11898-3 EMC requirements by preventing leakage current from waking MCU during vehicle off-state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245DGGR | Wider VCC range (1.2V–3.6V), higher drive (±12mA), but no IOFF support below 1.2V. | Lacks guaranteed 0.8V operation and IOFF at sub-1V - unsuitable for ultra-low-voltage SoC integration. | Select when interfacing ≥1.2V domains and higher drive is needed; avoid for 0.8V core interfaces. |
| TXB0108PWR | Auto-direction sensing, lower drive (±2mA), supports 1.2V–3.6V translation with integrated auto-bidirectional logic. | No DIR/OE pins - eliminates control logic overhead but adds latency (~10ns) and limits use in synchronous timing-critical paths. | Prefer for simple GPIO expansion where direction changes infrequently; avoid for DDR or real-time control buses. |
Compared with SN74AVCH16T245DGGR and TXB0108PWR, PI74AUC164245AE uniquely combines 0.8V minimum operation, IOFF down to 0V, and sub-3ns tPD - making it the only choice for timing-critical, ultra-low-voltage bidirectional translation in next-gen embedded systems.
Availability
PI74AUC164245AE is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA I/O bridging, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PI74AUC164245AE 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 solutions, clock management, and signal-integrity ICs for computing, communications, and industrial markets.
The PI74AUC164245AE belongs to Pericom's AUC ultra-low-voltage logic family, engineered specifically for sub-1V core voltage translation in advanced SoCs and portable electronics where power efficiency and signal fidelity are co-constrained.
FAQ
What is the minimum operating voltage for VCCA and VCCB?
The PI74AUC164245AE is fully specified from 0.8V to 2.7V on both VCCA and VCCB rails. Operation below 0.8V is not guaranteed - parameters like VOH, VOL, and tPD degrade outside this range, and IOFF functionality may not engage reliably under 0.8V.
Can VCCA and VCCB be set to different voltages simultaneously?
Yes - the device is explicitly designed for asymmetric dual-rail operation. For example, VCCA can be 1.2V (MCU I/O) while VCCB is 2.5V (sensor interface), enabling seamless bidirectional translation without external components or level-shifting circuitry.
How does the IOFF feature behave when only VCCA is powered?
When VCCA = 0V and VCCB > 0V, the IOFF circuit forces all outputs (A- and B-side) into high-impedance state, blocking current flow from VCCB into the unpowered A-port. This prevents latch-up and protects downstream 0.8V logic from overvoltage stress.
Is the PI74AUC164245AE pin-compatible with other 48-pin TSSOP level shifters?
No - pinout is specific to Pericom's dual-octal architecture. While package dimensions match standard 48-pin TSSOP, signal assignments (e.g., interleaved A/B ports, dual DIR/OE pairs) differ from TI, NXP, or ON Semi equivalents; PCB layout must follow the documented pin map exactly.
PI74AUC164245AE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74AUC
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 0.8 V ~ 2.7 V
- Voltage - VCCB:
- 0.8 V ~ 2.7 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)
PI74AUC164245AE FAQ
1.How can I place an order for PI74AUC164245AE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74AUC164245AE 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 PI74AUC164245AE reliable?
The price and inventory of PI74AUC164245AE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74AUC164245AE is usually 5 days.
3.What payment methods are accepted for PI74AUC164245AE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74AUC164245AE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74AUC164245AE?
PI74AUC164245AE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74AUC164245AE 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 PI74AUC164245AE?
For technical support, including PI74AUC164245AE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74AUC164245AE requirements.
6.How does Aetrix verify that PI74AUC164245AE is sourced from the original manufacturer or authorized distributors?
All PI74AUC164245AE 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 PI74AUC164245AE meets industry standards.
7.What is the process for return or replacement of PI74AUC164245AE?
All PI74AUC164245AE units undergo pre-shipment inspection (PSI). If there is an issue with PI74AUC164245AE, 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 PI74AUC164245AE part is unused and in its original packaging.
Return procedure for PI74AUC164245AE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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