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Diodes Incorporated PI3VT3245L
- Part No.:
- PI3VT3245L
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3VT3245L.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
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Product details
Overview
PI3VT3245L from Pericom Semiconductor is an 8-bit, 2-port bus switch IC with active-low Bus Enable (BE) control, 5 Ω typical on-resistance at 3.3 V supply, 2.5 V/3.3 V dual-supply operation, and voltage translation capability (3.3 V ↔ 2.5 V and 2.5 V ↔ 1.8 V). It serves as a bidirectional level-shifting interface between mixed-voltage domains in memory expansion and peripheral interconnects.
For engineers reviewing the PI3VT3245L datasheet, PI3VT3245L pinout, PI3VT3245L application, or PI3VT3245L equivalent, key selection criteria include verified on-resistance (5–30 Ω across voltage/load conditions), sub-ns propagation delay (0.25 ns typ.), BE-controlled high-impedance isolation, and TSSOP-20 package compatibility with 1.73-mm body width and 0.65-mm lead pitch.
Technical Context
The PI3VT3245L implements eight independent bilateral MOSFET switches controlled by a single active-low BE signal, enabling simultaneous connection or isolation of A0–A7 to B0–B7. Its CMOS transmission-gate architecture supports bidirectional signal flow without direction pins.
It operates across two distinct supply ranges: 2.5 V ±0.2 V and 3.3 V ±0.3 V, with corresponding output pass voltages of 1.8 V (min) and 2.3 V (min), respectively. Input logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are compatible with TTL and CMOS drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V ±0.2 V or 3.3 V ±0.3 V - enables interoperability between 2.5 V and 3.3 V logic domains |
| On-Resistance (RON) | 5 Ω typ. at VCC = 3.3 V, VIN = 0 V - ensures minimal voltage drop and signal integrity for 8-bit parallel buses |
| Propagation Delay | 0.25 ns typ. (Ax to Bx, CL = 50 pF) - adds negligible timing overhead in high-speed data paths |
| Enable/Disable Time | 1.5–9.8 ns (BE to Ax/Bx) - supports fast bus arbitration and dynamic port switching |
| Input Capacitance | 3.5 pF (VIN = 0 V) - limits capacitive loading on driving sources in dense PCB layouts |
| Quiescent Current | 3 µA max. - enables low-power standby in battery-backed or always-on subsystems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and telecom equipment |
Pinout & Package
PI3VT3245L is housed in a 20-pin, 173-mil wide plastic TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, JEDEC MO-153 compliant, RoHS-compliant and Pb-free option available (PI3VT3245LE).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Active-low bus enable control input | Drives all eight switches ON (low) or OFF (high); asserts high-impedance state when deasserted |
| A0–A7 | Port A bidirectional data terminals | Connect directly to source-side bus (e.g., CPU or controller); no direction control required |
| B0–B7 | Port B bidirectional data terminals | Connect directly to sink-side bus (e.g., memory or peripheral); mirrors A-side signals when enabled |
| VCC | Positive power supply | Supplies internal switch bias; sets translation reference voltage for output levels |
| GND | Ground reference | Common return path for all I/O and internal circuitry; must be low-impedance |
| NC | No-connect terminal | Pin 1 is unconnected internally; must remain floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional voltage translation | Supports 3.3 V ↔ 2.5 V and 2.5 V ↔ 1.8 V level shifting without external components or direction control |
| Low on-resistance | 5 Ω typical ensures <100 mV voltage drop at 20 mA per line, preserving logic margins in parallel bus interfaces |
| Near-zero propagation delay | 0.25 ns typical eliminates timing budget impact in DDR, PCI, or ISA-style data transfers |
| High-impedance isolation | Output leakage ≤±1 µA in disabled state prevents contention and back-driving between isolated bus segments |
| Low quiescent current | 3 µA max. allows integration into power-sensitive systems such as portable instrumentation or remote sensors |
Applications
| Memory Expansion Interface | Peripheral Bridge Interface |
|---|---|
Use Scenario: Connecting a 3.3 V microcontroller to a 2.5 V SRAM module in a compact industrial controller. IC Role / Device Role / Timing Role: Bidirectional level translator and bus switch enabling read/write cycles without direction control or timing penalty. Use Value: Eliminates need for discrete level shifters and direction logic, reducing BOM count and PCB area by >30%. | Use Scenario: Isolating a 2.5 V FPGA configuration bus from a 3.3 V JTAG debugger during programming and runtime. IC Role / Device Role / Timing Role: Controlled isolation switch with sub-10 ns enable/disable latency for safe hot-plug debugging. Use Value: Prevents voltage conflict and latch-up risk while maintaining full-speed JTAG communication when active. |
| Legacy Bus Adapter | Low-Power Sensor Hub Interface |
Use Scenario: Adapting a 1.8 V sensor array to a 2.5 V system management bus in an automotive body control module. IC Role / Device Role / Timing Role: Voltage-translating bus switch supporting bidirectional SMBus-compatible signaling. Use Value: Maintains I²C timing compliance (tBUF, tHD:STA) despite voltage domain mismatch, avoiding protocol errors. | Use Scenario: Interfacing multiple 1.8 V environmental sensors to a 2.5 V MCU ADC input multiplexer in a wireless node. IC Role / Device Role / Timing Role: Low-leakage, low-RON analog signal path switch enabling shared ADC channel access. Use Value: Reduces input offset error (<0.5 mV) and preserves SNR by minimizing series resistance in sensor signal chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch and voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245 | Direction-controlled (DIR pin), higher drive strength (24 mA), 1.65–3.6 V supply range | Requires explicit direction management; unsuitable for fully bidirectional passive translation | Select when directional control and higher current drive are needed; avoid if BE-only control and zero-delay translation are mandatory |
| TXS0108E | Auto-direction sensing, 1.65–3.6 V, higher RON (~12 Ω), integrated 10-kΩ pull-ups | Introduces direction detection latency (~20 ns) and fixed pull-up bias incompatible with open-drain buses | Select for I²C/SMBus translation with automatic direction handling; avoid for high-speed parallel buses requiring deterministic timing |
Compared with SN74AVC8T245 and TXS0108E, PI3VT3245L uniquely delivers true bidirectional, directionless switching with sub-ns delay and guaranteed 5 Ω RON-critical for legacy parallel bus upgrades where timing predictability and minimal component count outweigh direction flexibility.
Availability
PI3VT3245L is available at Aetrix Electronics and suitable for memory expansion interfaces, peripheral bridge designs, legacy bus adapters, and low-power sensor hub interfaces requiring stable component supply and long-term industrial availability.
Supply support for PI3VT3245L 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-performance interface, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2016; its legacy products remain widely deployed in industrial and communications infrastructure.
The PI3VT series targets voltage-translation and bus-switching applications in mixed-supply systems, emphasizing low on-resistance, zero-direction-control operation, and compatibility with legacy parallel architectures like ISA, PCI, and proprietary memory buses.
FAQ
What is the maximum continuous current per switch channel?
The PI3VT3245L supports up to 120 mA DC output current per channel, as specified in Absolute Maximum Ratings. However, sustained operation above 20 mA per channel increases junction temperature and may exceed thermal limits under typical PCB copper pour conditions; derating is recommended above 85°C ambient.
Can PI3VT3245L translate between 3.3 V and 1.8 V directly?
No. The device performs 3.3 V → 2.5 V and 2.5 V → 1.8 V translation only. Direct 3.3 V-to-1.8 V translation is not supported because VCC must match the higher rail, and pass voltage is defined relative to VCC-not an intermediate rail. Cascading two devices is required for that function.
Is the BE pin 5 V tolerant when VCC = 2.5 V?
No. The absolute maximum input voltage is VCC + 0.3 V per datasheet. With VCC = 2.5 V, VIH max is 2.8 V. Applying 5 V to BE exceeds this rating and risks permanent damage. A level-shifter or resistor divider is required for 5 V control signals.
Does PI3VT3245L require external pull-up or pull-down resistors on A/B lines?
No. The device has no internal biasing on A or B ports. External pull-ups or pull-downs must be added based on system requirements (e.g., I²C bus pull-ups, idle-state termination). The NC pin (Pin 1) must remain unconnected or grounded per layout guidance in the mechanical drawing.
PI3VT3245L Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 8 x 1:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
PI3VT3245L FAQ
1.How can I place an order for PI3VT3245L through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3VT3245L 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 PI3VT3245L reliable?
The price and inventory of PI3VT3245L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3VT3245L is usually 5 days.
3.What payment methods are accepted for PI3VT3245L?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3VT3245L transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3VT3245L?
PI3VT3245L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3VT3245L 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 PI3VT3245L?
For technical support, including PI3VT3245L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3VT3245L requirements.
6.How does Aetrix verify that PI3VT3245L is sourced from the original manufacturer or authorized distributors?
All PI3VT3245L 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 PI3VT3245L meets industry standards.
7.What is the process for return or replacement of PI3VT3245L?
All PI3VT3245L units undergo pre-shipment inspection (PSI). If there is an issue with PI3VT3245L, 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 PI3VT3245L part is unused and in its original packaging.
Return procedure for PI3VT3245L:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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