Diodes Incorporated PI74AVC164245AE

Overview

PI74AVC164245 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 logic domains. It features 3-state outputs, industrial temperature range (–40°C to +85°C), and supports asynchronous data bus interfacing in mixed-voltage systems such as DDR memory interfaces and FPGA I/O bridging.

For engineers reviewing the PI74AVC164245 datasheet, PI74AVC164245 pinout, PI74AVC164245 application, or PI74AVC164245 equivalent, key selection criteria include verified VCCA/VCCB rail separation, guaranteed 3-state output behavior during power sequencing, propagation delay under 6.4 ns at 30 pF load, and package-specific thermal impedance (e.g., 58°C/W for TVSOP).

Technical Context

The device implements two independent 8-bit transceiver sections, each with direction control (DIR) and output-enable (OE) inputs operating at LVTTL-compatible voltage thresholds. Signal translation occurs without internal level-shifting circuitry-voltage domain isolation is achieved solely through separate VCCA and VCCB supplies connected directly to respective I/O banks.

Each port's input threshold scales with its supply: V_IH on A-port is ~0.65×VCCA (e.g., 1.25V at VCCA=1.8V); B-port V_IH is ~0.7×VCCB (2.3V at VCCB=3.3V). Output drive strength is asymmetric-A-port sinks 8 mA / sources 4 mA at VCCA=1.8V; B-port sinks/sources ±21 mA at VCCB=3.3V.

Key Specifications

Pinout & Package

PI74AVC164245 is available in three 48-pin surface-mount packages: SSOP (V), TSSOP (A), and TVSOP (K). All share identical pin mapping and electrical functionality; thermal performance differs (TVSOP: 58°C/W θ_JA, SSOP: 94°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level translation applications.

Compared with SN74AVCH16T245 and TXB0108, PI74AVC164245 provides deterministic direction control, true dual-supply isolation, and lower static current-making it optimal for mixed-voltage systems requiring robust power sequencing and precise timing control.

Availability

PI74AVC164245 is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA I/O bridging, PCIe slot adapters, and automotive infotainment hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PI74AVC164245 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 communications and computing markets.

The AVC logic family targets low-voltage, high-speed bus interfacing-designed specifically for voltage translation in DDR, PCI, and FPGA-ASIC interconnect applications where timing predictability and power sequencing resilience are critical.

FAQ

Can PI74AVC164245 operate with VCCA = 1.8V and VCCB = 3.3V simultaneously?

Yes. The device is explicitly characterized for this condition: VCCA = 1.8V ±0.1V and VCCB = 3.3V ±0.3V. Electrical specs-including propagation delay (≤6.4 ns), output drive (±4 mA A-port, ±21 mA B-port), and input thresholds-are guaranteed across this combination per datasheet Tables 4 and 5.

What is the recommended pull-up resistance for OE pins?

A 10 kΩ pull-up resistor to VCC (VCCA or VCCB depending on OE source) is typical. The minimum value is determined by the driver's sink capability: OE must be held >2.0V (VCCB) or >1.25V (VCCA=1.8V) to ensure reliable disable; worst-case leakage is ±5 µA, so R_PU ≤ (VCC − V_IH) / 5 µA ≈ 22 kΩ.

Does PI74AVC164245 support hot-swap insertion?

Yes. Its power-up Hi-Z behavior-outputs remain three-stated until both VCCA and VCCB exceed 0.3V-is designed for hot-swap safety. No bus contention occurs during partial power application, and I/O clamping (±50 mA) protects against transients during connector mating.

How does thermal performance differ among SSOP, TSSOP, and TVSOP packages?

θ_JA is 94°C/W (SSOP-V), 89°C/W (TSSOP-A), and 58°C/W (TVSOP-K) per JESD 51. TVSOP's lower thermal resistance results from finer pitch and enhanced copper exposure, making it preferred for >50 mW dissipation scenarios; SSOP requires larger copper pours or airflow for equivalent cooling.