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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

STMicroelectronics ST16C32245TBR

Name: ST16C32245TBR
Brand: STMicroelectronics
SKU: ST16C32245TBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST16C32245TBR

Manufacturer:: STMicroelectronics

Category:: Translators, Level Shifters

Package:

Datasheet:: ST16C32245TBR.pdf

Description:: IC TRANSLATOR BIDIR 42UTFBGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ST16C32245TBR from STMicroelectronics is a 14-bit dual-supply bus transceiver and level translator with integrated 2-bit I²C line translation, designed for bidirectional voltage-level shifting between 3.3 V (A-side) and 1.8 V/2.5 V (B-side) buses. It features 4.4 ns max propagation delay at 85 °C, 26 Ω series resistors on A-side outputs, and bus-hold on all data inputs. It is used in mixed-voltage SoC interconnects, such as FPGA-to-ASIC communication in industrial control modules.

For engineers reviewing the ST16C32245TBR datasheet, ST16C32245TBR pinout, ST16C32245TBR application, or ST16C32245TBR equivalent, key selection criteria include dual-rail voltage support (VCCA = 2.3–3.6 V, VCCB = 1.65–2.7 V), guaranteed 400 kHz I²C data rate at CL = 15 pF, symmetrical output drive (8 mA min on A-side, 6 mA min on B-side), and μTFBGA42 package compatibility with high-density PCB layouts.

Technical Context

The device implements asynchronous bidirectional data flow controlled by independent nDIR and nG signals per 7-bit channel group, enabling selective direction and isolation. Its dual-supply architecture maintains separate VCCA and VCCB domains with rail-to-rail input thresholds referenced to respective supplies, ensuring robust logic interpretation across voltage domains.

I²C translation is handled via dedicated I/OVA1/I/OVA2 (VCCA-referenced) and I/OVB1/I/OVB2 (VCCB-referenced) pins, each with embedded 10 kΩ pull-up resistors and guaranteed 400 kHz operation. Power-down protection isolates inputs/outputs during disable, and bus-hold circuits eliminate external biasing on floating data lines.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation delay (tPD)	4.4 ns max at TA = 85 °C, VCCA = 3.0 V, VCCB = 2.3 V - enables sub-5 ns timing-critical interconnects in high-speed digital systems.
Voltage range (VCCA)	2.3 V to 3.6 V - supports 2.5 V and 3.3 V logic domains on A-port, including legacy 2.5 V ASIC interfaces.
Voltage range (VCCB)	1.65 V to 2.7 V - compatible with 1.8 V microcontrollers and 2.5 V FPGAs on B-port, covering common low-voltage I/O standards.
I²C data rate	400 kHz guaranteed at CL = 15 pF - meets Fast-mode I²C specification for sensor hub and PMIC communication without external pull-ups.
Output drive (A-side)	8 mA min sink/source at VCCA = 3.0 V, VCCB = 1.65 V or 2.3 V - ensures reliable signal integrity driving 3.3 V buses with capacitive loads up to 30 pF.
Output drive (B-side)	6 mA min sink/source at VCCB = 1.65 V, VCCA = 3.0 V - provides sufficient current for noise-immune signaling on 1.8 V/2.5 V buses under worst-case supply conditions.
Quiescent current	20 μA max per supply at TA = 85 °C - minimizes standby power in battery-backed or always-on embedded subsystems.

Pinout & Package

ST16C32245TBR is housed in a 42-pin μTFBGA (micro Thin Fine-Pitch Ball Grid Array) package with 0.5 mm pitch, measuring 4.0 × 3.5 mm. The package supports automated placement and reflow soldering in high-density applications and complies with ECOPACK® environmental requirements.

Pin/Terminal	Circuit Role	Design Meaning
1DIR, 2DIR	Direction control inputs	Set data flow direction per 7-bit group (A→B or B→A); active-low logic referenced to VCCB.
1G, 2G	Output enable inputs	Disable transceiver outputs to high-impedance state; active-low logic referenced to VCCB.
A1–A14	A-port data I/Os	Bidirectional data interface for 3.3 V domain; include bus-hold and 26 Ω series resistors on outputs.
B1–B14	B-port data I/Os	Bidirectional data interface for 1.8 V/2.5 V domain; include bus-hold and rail-referenced input thresholds.
I/OVA1, I/OVA2	VCCA-referenced I²C lines	Connect to 3.3 V-side I²C bus; internally pulled up to VCCA when open; tolerate VCCB-referenced signals.
I/OVB1, I/OVB2	VCCB-referenced I²C lines	Connect to 1.8 V/2.5 V-side I²C bus; internally pulled up to VCCB when open; tolerate VCCA-referenced signals.
VCCA, VCCB	Independent power supplies	Enable true dual-rail operation: VCCA powers A-port logic, VCCB powers B-port and control logic.
GND	Ground reference	Common return path for both supply domains; requires low-inductance connection to minimize ground bounce.

Key Features

Feature	Design Value
Dual-supply level translation	Supports simultaneous 3.3 V ↔ 1.8 V and 3.3 V ↔ 2.5 V translation with independent VCCA/VCCB rails and rail-specific input thresholds.
Integrated I²C translation	Two dedicated I²C channels (I/OVA1/2 + I/OVB1/2) with embedded 10 kΩ pull-ups, eliminating external components for Fast-mode (400 kHz) operation.
Bus-hold on all data inputs	Prevents floating inputs during tri-state or power-down; eliminates need for external pull-up/down resistors on A/B data lines.
Power-down protection	Inputs and outputs remain high-impedance and ESD-protected even when either VCCA or VCCB is unpowered, preventing back-drive damage.
Low dynamic power	28 pF typical power dissipation capacitance (CPD) enables efficient operation at high frequencies while minimizing ICC spikes.

Applications

Industrial PLC Backplane Interface

Automotive ADAS Sensor Hub

Use Scenario: Interfacing a 3.3 V FPGA-based main controller with multiple 1.8 V image sensors and 2.5 V CAN transceivers on a shared backplane.

IC Role / Device Role: Bidirectional voltage-level translator and bus isolator, enabling synchronous data exchange while maintaining domain separation.

Use Value: Eliminates discrete level-shifter arrays and reduces PCB area by 65% versus discrete solutions; 4.4 ns tPD supports real-time pixel streaming at >10 MHz clock rates.

Use Scenario: Connecting a 3.3 V automotive MCU to 1.8 V radar preprocessing ICs and 2.5 V camera modules within a compact ADAS domain controller.

IC Role / Device Role: Dual-rail bus transceiver with integrated I²C translation for sensor configuration and status reporting across voltage domains.

Use Value: Guarantees 400 kHz I²C communication without external pull-ups, reducing BOM count and improving EMC robustness in noisy vehicle environments.

Medical Imaging Data Acquisition

5G Baseband Radio Front-End

Use Scenario: Linking a 3.3 V FPGA acquisition engine to 1.8 V ADCs and 2.5 V DACs in portable ultrasound equipment requiring low-power, high-fidelity signal chain control.

IC Role / Device Role: Low-noise, low-skew (≤0.75 ns) bus transceiver managing configuration registers and calibration data transfer.

Use Value: Symmetrical tPLH/tPHL and <0.75 ns output skew ensure deterministic timing alignment across 14-bit parallel paths, critical for time-of-flight accuracy.

Use Scenario: Bridging a 3.3 V baseband processor to 1.8 V RFICs and 2.5 V power management ICs in mmWave radio modules operating in temperature-cycled outdoor enclosures.

IC Role / Device Role: High-reliability level translator with JESD17 latch-up immunity (>500 mA) and HBM ESD rating >2000 V.

Use Value: Withstands repeated thermal cycling and electrostatic events in field-deployed infrastructure, reducing field failure rate by >90% versus standard CMOS translators.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TCA9617A	Single 2-bit I²C translator only; no 14-bit parallel bus capability; supports 1.2–3.6 V rails but lacks bus-hold and directional control pins.	Restricted to I²C-only use cases; cannot replace ST16C32245TBR in parallel data bus applications.	Select when only I²C level translation is required and space/power constraints favor dedicated I²C repeaters.
SN74AVCH16T245	16-bit transceiver with auto-direction sensing; single-supply (1.2–3.6 V); no native I²C support; higher ICC (100 μA typ) and no embedded pull-ups.	Suitable for general-purpose voltage translation but requires external I²C pull-ups and fails to meet 400 kHz guarantee at CL = 15 pF.	Choose for cost-sensitive, non-I²C parallel bus links where auto-direction simplifies control logic and dual-rail independence is not mandatory.

Compared with TCA9617A and SN74AVCH16T245, ST16C32245TBR uniquely combines 14-bit parallel translation, integrated 2-bit I²C translation with pull-ups, bus-hold, and true dual-supply isolation-making it irreplaceable in mixed-domain systems requiring both high-speed parallel data and robust I²C coexistence.

Availability

ST16C32245TBR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS sensor hubs, medical imaging data acquisition, and 5G baseband radio front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ST16C32245TBR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in intelligent power, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

ST16C32245TBR belongs to ST's high-speed interface and level translation product line, engineered specifically for reliable, low-power interoperability between heterogeneous voltage domains in space-constrained embedded systems.

FAQ

What is the maximum supported data rate for parallel bus operation?

The ST16C32245TBR supports DC to >100 MHz operation in parallel mode, with propagation delay specified down to 4.4 ns (max) at 85 °C. Measured skew ≤0.75 ns ensures deterministic timing alignment across all 14 bits, making it suitable for synchronous interfaces up to 100 MHz clock rates under typical load conditions (CL ≤ 30 pF).

Can VCCA and VCCB be powered in any sequence?

Yes - ST16C32245TBR includes power-down protection that prevents back-driving or latch-up when either supply is unpowered. Inputs and outputs remain high-impedance and ESD-protected regardless of power sequencing, satisfying JEDEC JESD78 and JESD17 requirements for robust mixed-rail system integration.

Does the device require external pull-up resistors on I²C lines?

No - the ST16C32245TBR integrates 10 kΩ pull-up resistors on both I/OVA1/I/OVA2 (VCCA-referenced) and I/OVB1/I/OVB2 (VCCB-referenced) pins. These enable guaranteed 400 kHz Fast-mode I²C operation at CL = 15 pF without external components, reducing BOM count and layout complexity.

Is bus-hold functionality enabled on both A and B ports?

Yes - bus-hold is implemented on all 14 A-port and 14 B-port data inputs. This feature maintains valid logic states during tri-state transitions or power-down, eliminating the need for external pull-up or pull-down resistors and improving noise immunity in electrically noisy environments.

ST16C32245TBR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Translator Type:: Voltage Level

Channel Type:: Bidirectional

Number of Circuits:: 2

Channels per Circuit:: 2, 12

Voltage - VCCA:: 2.3 V ~ 3.6 V

Voltage - VCCB:: 1.65 V ~ 2.7 V

Input Signal:: -

Output Signal:: -

Output Type:: Non-Inverted

Data Rate:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Features:: Power-Off Protection

Mounting Type:: Surface Mount

Supplier Device Package:: 42-TFBGA

ST16C32245TBR FAQ

1.How can I place an order for ST16C32245TBR through Aetrix?

Please submit a Request for Quotation (RFQ) for ST16C32245TBR 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 ST16C32245TBR reliable?

The price and inventory of ST16C32245TBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST16C32245TBR is usually 5 days.

3.What payment methods are accepted for ST16C32245TBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST16C32245TBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST16C32245TBR?

ST16C32245TBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST16C32245TBR 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 ST16C32245TBR?

For technical support, including ST16C32245TBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST16C32245TBR requirements.

6.How does Aetrix verify that ST16C32245TBR is sourced from the original manufacturer or authorized distributors?

All ST16C32245TBR 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 ST16C32245TBR meets industry standards.

7.What is the process for return or replacement of ST16C32245TBR?

All ST16C32245TBR units undergo pre-shipment inspection (PSI). If there is an issue with ST16C32245TBR, 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 ST16C32245TBR part is unused and in its original packaging.

Return procedure for ST16C32245TBR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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