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STMicroelectronics ST2378EBJR
- Part No.:
- ST2378EBJR
- Manufacturer:
- STMicroelectronics
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
ST2378EBJR.pdf
- Description:
- IC TRANSLATOR BIDIR 20FLIPCHIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,004
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Product details
Overview
ST2378EBJR from STMicroelectronics is an 8-bit dual-supply bidirectional level translator supporting 1.71 V to 5.5 V logic translation between VL and VCC domains, with ±15 kV HBM ESD protection on I/OVCC lines, 13 Mbps guaranteed data rate, and TSSOP20 packaging - used for interfacing low-voltage ASICs/PLDs (e.g., 1.8 V I²C peripherals) with higher-voltage microcontrollers or FPGAs.
For engineers reviewing the ST2378EBJR datasheet, ST2378EBJR pinout, ST2378EBJR application, or ST2378EBJR equivalent, key selection criteria include bidirectional operation without direction control, totem-pole/open-drain I²C compatibility, 15 ns max propagation delay at 85 °C, 5 V tolerance on OE, and dual-supply quiescent current below 100 µA at VL and 10 µA at VCC.
Technical Context
The ST2378EBJR employs a transmission-gate-based architecture enabling true asynchronous bidirectional data flow per channel - no direction pin required. It supports two distinct driving modes: totem-pole (for high-speed 13 Mbps operation) and open-drain (for I²C bus compatibility), with separate rise/fall time and propagation delay specifications for each.
Its dual-supply design requires VL ≤ VCC (1.71 V to 5.5 V range for both), with OE referenced to VL and 5 V tolerant. ESD robustness is implemented via ±15 kV HBM protection specifically on I/OVCC pins, while I/OVL pins meet standard IEC 61000-4-2 Level 4 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Levels | VL = 1.71–5.5 V, VCC = 1.71–5.5 V; VL must be ≤ VCC for correct operation |
| Max Data Rate | 13 Mbps (totem-pole mode); 800 kbps (open-drain mode) - defines usable interface speed in I²C vs. parallel buses |
| Propagation Delay | tPD ≤ 15 ns (max) at TA = 85 °C, VL = 1.8 V, VCC = 5.5 V - enables timing-critical interconnects |
| ESD Protection | ±15 kV HBM on I/OVCC pins - eliminates need for external TVS diodes in industrial I/O interfaces |
| Quiescent Current | IQVL ≤ 100 µA, IQCC ≤ 10 µA at 85 °C - supports low-power always-on system monitoring paths |
| OE Pin Voltage | 5 V tolerant (VIH-TS ≥ 0.75 VL up to 5.5 V) - allows direct connection to 5 V controllers without level-shifting |
Pinout & Package
TSSOP20 package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, 1.05 mm max height, lead-free and RoHS-compliant per ECOPACK2 specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | OE (Output Enable) | Active-high enable referenced to VL; 5 V tolerant; places all I/Os in high-impedance when low |
| 2, 4, 6, 8, 12, 14, 16, 18 | I/OVL1–I/OVL8 | Bidirectional data terminals referenced to VL supply; accept 0–VL input, drive 0–VL output |
| 3, 5, 7, 9, 13, 15, 17, 19 | I/OVCC1–I/OVCC8 | Bidirectional data terminals referenced to VCC supply; accept 0–VCC input, drive 0–VCC output |
| 10 | GND | Dedicated ground reference for both supply domains; must be connected to system common ground |
| 20 | VCC | Primary high-side supply (1.71–5.5 V); powers I/OVCC side and internal circuitry |
| 1 | VL | Low-side supply (1.71–VCC); powers I/OVL side and OE logic; must be ≤ VCC |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation | No direction control pin required - simplifies PCB routing and firmware logic for mixed-voltage I/O expansion |
| I²C-compatible driving | Configurable totem-pole or open-drain output mode - supports standard-mode and fast-mode I²C without external pull-ups on VCC side |
| High ESD immunity | ±15 kV HBM on I/OVCC pins - meets industrial I/O port surge requirements without added protection components |
| Low static power | ITS-VL ≤ 1 µA in disable mode - enables zero-power isolation of peripheral buses during sleep states |
| Wide voltage interoperability | Supports 1.8 V ↔ 3.3 V, 1.8 V ↔ 5.0 V, and 3.3 V ↔ 5.0 V translations - covers most legacy and modern MCU/ASIC combinations |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Connecting 1.8 V MEMS sensors to 3.3 V CAN microcontroller via I²C bus. IC Role / Device Role / Timing Role: Bidirectional level translator enabling clock/data transfer between sensor domain (VL = 1.8 V) and MCU domain (VCC = 3.3 V) with open-drain I²C compliance. Use Value: Eliminates need for discrete MOSFET translators; ±15 kV ESD protection withstands automotive board-level transients. |
Use Scenario: Interfacing 5 V legacy LIN transceivers with 3.3 V ARM-based body controller over UART. IC Role / Device Role / Timing Role: Unidirectional level shift (VCC = 5 V → VL = 3.3 V) on RX line; OE-controlled isolation during MCU reset. Use Value: 15 ns max tPD ensures UART timing margins at 1 Mbps; 5 V-tolerant OE allows direct connection to 5 V reset supervisor. |
| Portable Medical Device | Industrial PLC I/O Expansion |
|
Use Scenario: Isolating ultra-low-power 1.8 V ADCs from 5 V FPGA logic in battery-powered patient monitor. IC Role / Device Role / Timing Role: Dual-supply translator with VL = 1.8 V (ADC side), VCC = 5 V (FPGA side); OE synchronized to ADC conversion cycle. Use Value: IQVL ≤ 100 µA preserves battery life; 13 Mbps capability supports high-resolution serial ADC streaming. |
Use Scenario: Adding 3.3 V digital I/O modules to existing 24 V PLC backplane using isolated 5 V local supply. IC Role / Device Role / Timing Role: Level translation between 3.3 V FPGA I/O banks and 5 V optocoupler drivers; OE tied to module enable signal. Use Value: TSSOP20 footprint fits dense I/O carrier boards; ±15 kV ESD protects against field wiring faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0108PWR | Auto-direction sensing; no OE pin; 32 mA drive strength; lower ESD (±8 kV HBM) | Requires stable bus activity for direction detection; unsuitable for idle-bus or low-duty-cycle protocols | Prefer when automatic direction handling is acceptable and ESD margin >8 kV is sufficient |
| SN74AVC8T245RHLR | Direction-controlled (DIR pin); 3-state outputs; 12 mA drive; no integrated ESD beyond standard IO | Requires external ESD protection for industrial environments; adds PCB routing complexity for DIR signal | Prefer when precise direction control and 3-state isolation are needed, and external ESD is already deployed |
Compared with TXB0108PWR and SN74AVC8T245RHLR, the ST2378EBJR uniquely combines OE-based disable control, ±15 kV I/OVCC ESD, and guaranteed 13 Mbps performance across full voltage range - making it optimal for industrial I²C, isolated sensor hubs, and systems requiring deterministic enable/disable sequencing.
Availability
ST2378EBJR is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, portable medical devices, and PLC I/O expansion requiring stable component supply across extended temperature and voltage ranges.
Supply support for ST2378EBJR 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The ST2378EBJR belongs to ST's level translation product line, engineered specifically for robust, low-latency voltage-domain bridging in harsh industrial and automotive environments where ESD resilience and supply flexibility are critical.
FAQ
Can ST2378EBJR translate between VL = 3.3 V and VCC = 1.8 V?
No. The device requires VL ≤ VCC per datasheet operating conditions (Table 4). Setting VL = 3.3 V and VCC = 1.8 V violates this constraint and may cause undefined behavior or damage. Valid configurations include VL = 1.8 V / VCC = 3.3 V or VL = 3.3 V / VCC = 5.0 V.
Does ST2378EBJR support hot-swap or power sequencing where VL ramps before VCC?
Yes. The datasheet explicitly states that VL > (VCC + 0.3 V) during power-up will not damage the device (Notes 1 in Tables 5 and 6). This allows flexible sequencing - e.g., VL ramping first in systems with multiple supply rails - without risk of latch-up or overstress.
What is the maximum capacitive load supported at 13 Mbps operation?
The AC characteristics (Table 6) are specified with CL = 15 pF. At 13 Mbps, maintaining signal integrity requires total node capacitance ≤ 15 pF - including PCB trace, connector, and receiver input capacitance. Exceeding this increases rise/fall times and may violate setup/hold timing at the receiving device.
Is the ST2378EBJR pin-to-pin compatible with ST2378ETTR?
Yes. Both share identical TSSOP20 pinout, electrical specifications, and functional behavior. ST2378EBJR is the tape-and-reel variant of the same silicon die as ST2378ETTR; only packaging and reel configuration differ - no redesign or layout change is needed when switching between them.
ST2378EBJR 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:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 1.7 V ~ 5.5 V
- Voltage - VCCB:
- 1.7 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain
- Data Rate:
- 13Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing, Power-Off Protection
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VFBGA
ST2378EBJR FAQ
1.How can I place an order for ST2378EBJR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST2378EBJR 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 ST2378EBJR reliable?
The price and inventory of ST2378EBJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST2378EBJR is usually 5 days.
3.What payment methods are accepted for ST2378EBJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST2378EBJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST2378EBJR?
ST2378EBJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST2378EBJR 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 ST2378EBJR?
For technical support, including ST2378EBJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST2378EBJR requirements.
6.How does Aetrix verify that ST2378EBJR is sourced from the original manufacturer or authorized distributors?
All ST2378EBJR 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 ST2378EBJR meets industry standards.
7.What is the process for return or replacement of ST2378EBJR?
All ST2378EBJR units undergo pre-shipment inspection (PSI). If there is an issue with ST2378EBJR, 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 ST2378EBJR part is unused and in its original packaging.
Return procedure for ST2378EBJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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