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STMicroelectronics ST16C32245TBR-E
- Part No.:
- ST16C32245TBR-E
- Manufacturer:
- STMicroelectronics
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
ST16C32245TBR-E.pdf
- Description:
- IC TRANSLATOR BIDIR 42UTFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,497
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Product details
Overview
ST16C32245TBR-E from STMicroelectronics is a dual-supply 14-bit bus transceiver and I²C level translator, designed for bidirectional voltage translation between 3.3 V (A-side) and 1.8 V/2.5 V (B-side) buses. It delivers tPD = 4.4 ns max propagation delay at 85 °C, supports 400 kHz I²C data rate with 15 pF load, and integrates 26 Ω series resistors on A-side outputs for signal integrity in mixed-voltage embedded interfaces.
For engineers reviewing the ST16C32245TBR-E datasheet, ST16C32245TBR-E pinout, ST16C32245TBR-E application, or ST16C32245TBR-E equivalent, key selection criteria include dual-rail supply range (VCCA = 2.3–3.6 V, VCCB = 1.65–2.7 V), symmetrical 8 mA/6 mA drive capability per side, bus-hold inputs on both ports, and integrated I²C line translation with embedded 10 kΩ pull-ups.
Technical Context
The device implements two independent directional control paths (1DIR/2DIR) and two output-enable inputs (1G/2G), enabling selective isolation of 7-bit A→B and 7-bit B→A data channels. Its C2MOS sub-micron process ensures low ICCA/ICCB ≤ 20 μA at 85 °C while maintaining rail-to-rail logic compatibility across asymmetric supplies.
I²C functionality operates independently via dedicated I/OVA1/I/OVA2 (VCCA-referred) and I/OVB1/I/OVB2 (VCCB-referred) pins, supporting open-drain behavior with guaranteed 400 kHz operation at CL = 15 pF and dynamic rise/fall times ≤ 250 ns. Power-down protection prevents back-drive during VCC loss, and latch-up immunity exceeds 500 mA per JESD17.
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 high-speed interconnect in DDR-adjacent or real-time control buses |
| VCCA operating range | 2.3 V to 3.6 V - supports direct interface with 2.5 V/3.3 V microcontrollers and FPGAs |
| VCCB operating range | 1.65 V to 2.7 V - compatible with 1.8 V and 2.5 V logic families including LPDDR I/O and low-power sensors |
| I²C data rate | 400 kHz guaranteed at CL = 15 pF - meets Fast-mode I²C timing without external pull-up tuning |
| Output drive (A-side) | |IOHA| = |IOLA| ≥ 8 mA min at VCCA = 3.0 V - sustains robust signal integrity across PCB traces up to 10 cm |
| Output drive (B-side) | |IOHB| = |IOLB| ≥ 6 mA min at VCCB = 1.65 V - ensures reliable low-voltage switching into typical SoC GPIO loads |
| Bus hold current | ±45 μA at VI = 0.7 V (A-side), ±25 μA at VI = 0.57 V (B-side) - eliminates need for external termination on floating data lines |
| ESD rating | HBM > 2000 V, MM > 200 V - provides system-level ESD resilience in handheld and industrial edge nodes |
Pinout & Package
ST16C32245TBR-E is housed in a 42-ball μTFBGA package (3.9 × 3.4 mm, 0.5 mm pitch), optimized for space-constrained portable and automotive infotainment applications. The ball grid layout supports automated optical inspection and fine-pitch reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A14 | A-port data I/O (14-bit) | Bidirectional data path referenced to VCCA; includes bus-hold and 26 Ω series resistor on outputs |
| B1–B14 | B-port data I/O (14-bit) | Bidirectional data path referenced to VCCB; supports 1.65 V–2.7 V logic levels with bus-hold |
| 1DIR, 2DIR | Direction control inputs | Active-high signals determining data flow direction per 7-bit channel (A↔B); 'L' = A→B, 'H' = B→A |
| 1G, 2G | Output enable inputs | Active-low enables; when high, respective port enters high-Z state for bus isolation |
| I/OVA1, I/OVA2 | VCCA-referenced I²C lines | Open-drain I²C signals tied to VCCA domain; internally pulled up when I/OVB floats |
| I/OVB1, I/OVB2 | VCCB-referenced I²C lines | Open-drain I²C signals tied to VCCB domain; internally pulled up when I/OVA floats |
| VCCA | A-side supply | Provides power and logic reference for A-port; must be stable within 2.3–3.6 V during operation |
| VCCB | B-side supply | Provides power and logic reference for B-port; must be stable within 1.65–2.7 V during operation |
| GND | Ground reference | Common return for both supply domains; requires low-inductance connection to minimize ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail level translation | Simultaneous 14-bit bidirectional translation between 3.3 V and 1.8 V/2.5 V buses without external components |
| Integrated I²C translation | Dedicated I/OVA/I/OVB pins with internal 10 kΩ pull-ups enable seamless 400 kHz Fast-mode I²C bridging |
| Bus-hold inputs | Prevents floating states on A/B data lines, eliminating need for external pull resistors in standby or hot-swap scenarios |
| Power-down protection | Input/output clamping remains active during VCCA/VCCB ramp-down, preventing back-current injection into powered rails |
| Low quiescent current | ICCA = ICCB ≤ 20 μA at 85 °C ensures minimal battery drain in always-on sensor hubs and wearables |
| μTFBGA42 footprint | Compact 3.9 × 3.4 mm package reduces PCB area by >40% vs. TSSOP alternatives, easing routing in multi-layer mobile designs |
Applications
| Mobile Application Processor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Interfacing a 3.3 V application processor's parallel GPIO bus to a 1.8 V display timing controller in a smartphone mainboard. IC Role / Device Role / Timing Role: Voltage-level translator and bus isolator, enabling synchronous 14-bit pixel data transfer while preventing supply-domain contention. Use Value: Eliminates discrete resistor networks and level-shifter ICs, reducing BOM count by 3 components and saving 2.1 mm² PCB area. |
Use Scenario: Connecting a 3.3 V microcontroller's I²C master port to multiple 1.8 V sensor nodes (e.g., ambient light, proximity) in a vehicle door module. IC Role / Device Role / Timing Role: Dual-domain I²C repeater with automatic pull-up management, ensuring signal integrity across mixed-voltage sensor clusters. Use Value: Guarantees 400 kHz I²C timing compliance without external pull-up tuning, cutting firmware bring-up time by ~12 hours. |
| Industrial PLC I/O Expansion | Wearable Health Monitor Hub |
|
Use Scenario: Bridging a 2.5 V FPGA-based fieldbus interface to legacy 3.3 V RS-485 transceivers in a programmable logic controller backplane. IC Role / Device Role / Timing Role: Asymmetric bus transceiver with direction-controlled data flow, supporting hot-plug detection via DIR/G pin sequencing. Use Value: Enables deterministic <4.4 ns propagation delay across 14-bit control words, meeting 100 μs cycle-time requirements in motion control loops. |
Use Scenario: Level-translating sensor hub outputs (1.8 V SPI from accelerometer/gyro) to a 3.3 V Bluetooth SoC in a compact fitness tracker. IC Role / Device Role / Timing Role: Low-power bidirectional translator with bus-hold, maintaining valid logic states during intermittent SoC sleep modes. Use Value: Reduces average system current by 18 μA vs. discrete MOSFET translators, extending battery life by 9% in 7-day usage cycles. |
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 |
|---|---|---|---|
| TXS0108E | 8-bit, single-directional I²C translation only; no bus-hold; higher ICC = 80 μA | Limited to 8-bit data paths and lacks independent DIR/G controls for split-channel isolation | Choose when board space is constrained and only 8-bit translation + basic I²C bridging is required |
| SN74AVCH16T245 | 16-bit, single-supply (1.2–3.6 V), no native I²C support; requires external pull-ups | Cannot natively translate I²C signals; lacks embedded 10 kΩ pull-ups and VCCB-referenced I/OVA/I/OVB pins | Prefer for high-density memory bus translation where I²C is handled separately |
Compared with TXS0108E and SN74AVCH16T245, ST16C32245TBR-E uniquely combines 14-bit bidirectional translation, integrated I²C domain bridging, bus-hold, and ultra-low quiescent current-making it optimal for space- and power-sensitive mixed-voltage systems requiring both parallel and serial interface coexistence.
Availability
ST16C32245TBR-E is available at Aetrix Electronics and suitable for mobile processor interfaces, automotive body control modules, industrial PLC I/O expansion, and wearable health monitor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ST16C32245TBR-E 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, sensing, and automotive-grade ICs with over 45 years of analog/mixed-signal design heritage.
The ST16C32245 belongs to ST's voltage translation and interface portfolio, engineered specifically for seamless interoperability between legacy and next-generation low-voltage digital subsystems in portable, industrial, and automotive electronics.
FAQ
Can ST16C32245TBR-E translate between 3.3 V and 1.2 V logic?
No. ST16C32245TBR-E's VCCB minimum operating voltage is 1.65 V, and its B-port DC specifications (VIHB, VOHB, VOLB) are characterized only down to 1.65 V. Driving a 1.2 V domain would violate recommended operating conditions and risk incorrect logic thresholds or excessive leakage, as confirmed in Table 6 and Table 8 of the datasheet.
Does the device require external pull-up resistors on I²C lines?
No. ST16C32245TBR-E integrates 10 kΩ pull-up resistors on both I/OVA and I/OVB pins, as explicitly stated in Section 2.2 and Table 4. These internal resistors activate automatically when the complementary I²C line is left open, eliminating the need for external components in standard Fast-mode I²C configurations.
What happens to A/B-port outputs during power-down sequences?
During VCCA or VCCB ramp-down, ST16C32245TBR-E maintains input/output clamping per absolute maximum ratings (Table 5), preventing back-current injection into powered rails. This power-down protection is verified per JESD78 and ensures safe hot-swap and partial-power-loss scenarios without damaging connected devices.
Is the μTFBGA42 package RoHS-compliant and lead-free?
Yes. STMicroelectronics certifies the ST16C32245TBR-E μTFBGA42 package as ECOPACK®-compliant, meeting RoHS Directive 2011/65/EU and featuring lead-free solderable terminations. Mechanical data in Figure 8 and ECOPACK® status documentation confirm full environmental compliance per ST's public product declarations.
ST16C32245TBR-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 42-TFBGA
ST16C32245TBR-E FAQ
1.How can I place an order for ST16C32245TBR-E through Aetrix?
Please submit a Request for Quotation (RFQ) for ST16C32245TBR-E 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-E reliable?
The price and inventory of ST16C32245TBR-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST16C32245TBR-E is usually 5 days.
3.What payment methods are accepted for ST16C32245TBR-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST16C32245TBR-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST16C32245TBR-E?
ST16C32245TBR-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST16C32245TBR-E 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-E?
For technical support, including ST16C32245TBR-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST16C32245TBR-E requirements.
6.How does Aetrix verify that ST16C32245TBR-E is sourced from the original manufacturer or authorized distributors?
All ST16C32245TBR-E 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-E meets industry standards.
7.What is the process for return or replacement of ST16C32245TBR-E?
All ST16C32245TBR-E units undergo pre-shipment inspection (PSI). If there is an issue with ST16C32245TBR-E, 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-E part is unused and in its original packaging.
Return procedure for ST16C32245TBR-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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