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Diodes Incorporated PI4ULS3V204ZBEX
- Part No.:
- PI4ULS3V204ZBEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI4ULS3V204ZBEX.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 14TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,700
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Product details
Overview
PI4ULS3V204ZBEX from Diodes Incorporated is a 4-bit bidirectional auto-sensing level shifter supporting independent 1.1V–3.6V dual-supply operation on A and B ports, delivering 24 Mb/s push-pull and 2 Mb/s open-drain data rates with integrated 10 kΩ pull-up resistors - deployed in I²C/SMBus bus translation between mixed-voltage SoCs and peripherals.
For engineers reviewing the PI4ULS3V204ZBEX datasheet, PI4ULS3V204ZBEX pinout, PI4ULS3V204ZBEX application, or PI4ULS3V204ZBEX equivalent, key selection criteria include dual-rail voltage flexibility (1.1–3.6 V), directionless operation, EN-controlled tri-state, low propagation delay (as low as 3 ns), and TQFN-14 package compatibility with high-density PCB layouts.
Technical Context
The PI4ULS3V204ZBEX implements auto-sensing bidirectional translation using one-shot edge-detection circuits per channel, eliminating need for external direction control. Each I/O pair independently determines signal flow direction based on input transitions, enabling seamless communication across asymmetric voltage domains.
VCCA and VCCB operate independently within 1.1–3.6 V, supporting up/down/level-matched translation. The EN pin (referenced to VCCA) enables full I/O tri-state with <1 µA standby current, and internal 10 kΩ pull-ups are configurable via external parallel resistors for optimized rise time in open-drain configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 1.1 V to 3.6 V each - enables interoperability between 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains without sequencing constraints. |
| Max Data Rate (Push-Pull) | 24 Mb/s - supports high-speed interconnects such as fast-mode-plus I²C (1 Mbps) and proprietary serial links. |
| Max Data Rate (Open-Drain) | 2 Mb/s - compliant with standard and fast-mode I²C (up to 400 kHz) and SMBus timing requirements. |
| Propagation Delay | As low as 3 ns (VCCA=2.5 V, VCCB=3.3 V) - preserves signal integrity in timing-critical digital interfaces. |
| Integrated Pull-Up | 10 kΩ per I/O - eliminates external resistors for basic I²C pull-up, reducing BOM count and board area. |
| Enable Control (EN) | Active-high, VCCA-referenced - allows dynamic isolation of level-shifting paths during system sleep or reconfiguration. |
| ESD Rating | 8000 V HBM - ensures robustness against handling and board-level ESD events in portable and industrial environments. |
Pinout & Package
PI4ULS3V204ZBEX is housed in a 14-pin, 3.5 mm × 3.5 mm TQFN (ZB) package with exposed thermal pad, optimized for thermal performance and space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA (Pin 1) | A-port supply rail | Powers A-side I/Os; sets logic threshold for A1–A4 inputs/outputs (1.1–3.6 V). |
| A1–A4 (Pins 2–5) | Bidirectional A-port I/Os | Interface with lower-voltage domain (e.g., 1.2 V/1.8 V SoC); auto-sense direction per transition. |
| GND (Pin 7) | Common reference | Shared ground return for both supply domains; critical for noise immunity and skew control. |
| EN (Pin 8) | Enable control input | Tri-states all I/Os when low; referenced to VCCA; supports power-gating and hot-plug isolation. |
| B1–B4 (Pins 10–13) | Bidirectional B-port I/Os | Interface with higher-voltage domain (e.g., 2.5 V/3.3 V peripheral); tracks VCCB logic levels. |
| VCCB (Pin 14) | B-port supply rail | Powers B-side I/Os; sets logic threshold for B1–B4 (1.1–3.6 V); independent of VCCA sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control pin required | Auto-sensing architecture uses edge-triggered one-shot circuits per channel - eliminates routing complexity and firmware overhead. |
| Non-preferential power-up | VCCA and VCCB may power up in any order without latch-up or damage - simplifies power sequencing in multi-rail systems. |
| Low bit-to-bit skew | ≤1 ns part-to-part skew - maintains timing alignment across all four channels for synchronous bus translation. |
| Integrated 10 kΩ pull-ups | Reduces external component count for I²C/SMBus; pull-up target selectable between VCCA or VCCB per I/O line. |
| Low quiescent current | ≤3 µA total ICC (VCCA/VCCB = 1.1–3.6 V) - extends battery life in always-on mobile and IoT sensor nodes. |
Applications
| I²C Bus Translation | SMBus Host-Device Interface |
|---|---|
|
Use Scenario: Interfacing a 1.8 V microcontroller I²C master with a 3.3 V EEPROM slave in an embedded sensor module. IC Role / Device Role / Timing Role: Bidirectional level translator ensuring signal integrity across voltage domains while preserving I²C timing budgets (rise/fall times ≤300 ns). Use Value: Eliminates discrete MOSFET-based translators and external pull-ups, reducing layout area by >40% and BOM cost by $0.08/unit. |
Use Scenario: Connecting a 1.2 V baseband processor to a 2.5 V smart battery gauge over SMBus in a smartphone power management subsystem. IC Role / Device Role / Timing Role: Voltage-domain bridge with EN-controlled shutdown during battery calibration cycles to prevent bus contention. Use Value: Enables dynamic power gating without bus lockup; integrated pull-ups ensure reliable ACK/NACK signaling at 100 kHz SMBus rate. |
| MDIO Interface Isolation | Low-Voltage ASIC Co-Processing |
|
Use Scenario: Level-shifting MDIO signals between a 2.5 V PHY and a 1.1 V Ethernet MAC in a compact network switch ASIC. IC Role / Device Role / Timing Role: Bidirectional translator supporting IEEE 802.3 clause 22 MDIO timing (max 400 ns round-trip delay). Use Value: Meets MDIO setup/hold margins with 9 ns propagation delay; TQFN-14 footprint fits under PHY QFN body for vertical stacking. |
Use Scenario: Enabling communication between a 1.8 V AI accelerator ASIC and 3.3 V legacy sensor array in an edge inference camera. IC Role / Device Role / Timing Role: Configurable dual-supply interface allowing real-time voltage-domain negotiation during boot and runtime mode switching. Use Value: Supports adaptive voltage scaling - VCCA/VCCB can be dynamically adjusted to match active sensor/ASIC voltage states without hardware redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0104E | 4-channel, 1.65–3.6 V only; no sub-1.65 V support; requires external pull-ups; no EN pin. | Limited to 1.65+ V systems; lacks tri-state control and low-voltage (1.1 V) compatibility. | Select when operating exclusively above 1.65 V and external pull-up placement is acceptable. |
| PCA9306 | 2-channel, 1.2–3.3 V; open-drain only; no push-pull support; max 2 Mb/s; no EN pin. | Not suitable for high-speed push-pull protocols; insufficient channel count for 4-wire buses. | Choose only for simple 2-line I²C translation where speed and channel density are secondary. |
Compared with TXS0104E and PCA9306, PI4ULS3V204ZBEX uniquely supports 1.1 V operation, integrates pull-ups, provides EN control, and delivers 24 Mb/s push-pull performance - making it the only option qualified for next-gen ultra-low-voltage SoC interfaces requiring full 4-bit bidirectional translation.
Availability
PI4ULS3V204ZBEX is available at Aetrix Electronics and suitable for I²C bus translation, SMBus host-device interfacing, MDIO PHY-MAC bridging, and low-voltage ASIC co-processing requiring stable component supply across automotive infotainment, industrial IoT gateways, and portable medical devices.
Supply support for PI4ULS3V204ZBEX 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient solutions for power management, signal integrity, and connectivity applications.
The PI4ULS3V204 belongs to Diodes' Pericom® level translation product line, engineered specifically for low-latency, mixed-voltage digital interface bridging in space-constrained, battery-sensitive, and thermally demanding applications.
FAQ
What voltage combinations are supported between VCCA and VCCB?
PI4ULS3V204ZBEX supports any combination where VCCA and VCCB each range from 1.1 V to 3.6 V - including VCCA = 1.2 V / VCCB = 3.3 V, VCCA = 1.8 V / VCCB = 2.5 V, and VCCA = VCCB = 1.8 V. No minimum voltage difference is required, and either supply may be higher, lower, or equal to the other.
Can the internal 10 kΩ pull-up resistors be disabled or bypassed?
No - the 10 kΩ pull-ups are fixed and non-disableable. However, they can be effectively reduced by connecting external resistors in parallel (e.g., 20 kΩ external yields ~6.7 kΩ net). This is commonly done to meet faster I²C rise-time requirements while retaining internal integration benefits.
Does the EN pin affect both A and B port I/Os simultaneously?
Yes - asserting EN low places all eight I/O pins (A1–A4 and B1–B4) into high-impedance tri-state mode regardless of signal direction or voltage domain. This provides complete bus isolation and reduces system leakage current to <1 µA, critical for low-power sleep modes.
Is PI4ULS3V204ZBEX qualified for automotive applications?
The PI4ULS3V204ZBEX itself is not AEC-Q100 qualified; however, Diodes offers automotive-grade variants (e.g., PI4ULS3V204ZBEXQ) with PPAP capability, IATF 16949 manufacturing, and extended temperature testing. Standard ZBEX parts are rated for −40°C to +85°C and used in industrial and consumer designs.
PI4ULS3V204ZBEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ULS
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 4
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 1.1 V ~ 3.6 V
- Voltage - VCCB:
- 1.1 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- 2Mbps, 24Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-VFQFN Exposed Pad
PI4ULS3V204ZBEX FAQ
1.How can I place an order for PI4ULS3V204ZBEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4ULS3V204ZBEX 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 PI4ULS3V204ZBEX reliable?
The price and inventory of PI4ULS3V204ZBEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4ULS3V204ZBEX is usually 5 days.
3.What payment methods are accepted for PI4ULS3V204ZBEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4ULS3V204ZBEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4ULS3V204ZBEX?
PI4ULS3V204ZBEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4ULS3V204ZBEX 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 PI4ULS3V204ZBEX?
For technical support, including PI4ULS3V204ZBEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4ULS3V204ZBEX requirements.
6.How does Aetrix verify that PI4ULS3V204ZBEX is sourced from the original manufacturer or authorized distributors?
All PI4ULS3V204ZBEX 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 PI4ULS3V204ZBEX meets industry standards.
7.What is the process for return or replacement of PI4ULS3V204ZBEX?
All PI4ULS3V204ZBEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4ULS3V204ZBEX, 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 PI4ULS3V204ZBEX part is unused and in its original packaging.
Return procedure for PI4ULS3V204ZBEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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