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Toshiba Semiconductor and Storage TC7SPB9306TU,LF
- Part No.:
- TC7SPB9306TU,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 6-SMD, Flat Leads
- Datasheet:
-
TC7SPB9306TU,LF.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 UF6
- Quantity:
- Payment:
- Shipping:
Inventory:4,191
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Product details
Overview
TC7SPB9306TU from Toshiba Electronic Devices & Storage Corporation is a 1-bit dual-supply CMOS bus switch enabling bidirectional level translation between 1.65–5.0 V (VCCA) and 2.3–5.5 V (VCCB) domains. It features active-high OE control, 5.0 Ω typical ON-resistance at 3.0/4.5 V, 5.5 V-tolerant OE input, and operates from −40 °C to +85 °C in UF6 package. Used in voltage-domain bridging for I²C, SMBus, and GPIO expansion.
For engineers reviewing the TC7SPB9306TU datasheet, TC7SPB9306TU pinout, TC7SPB9306TU application, or TC7SPB9306TU equivalent, this page delivers verified electrical parameters, level-shift behavior under defined VCCA/VCCB combinations, OE timing constraints, power-down protection details, and real-world interface design guidance - all specific to the TC7SPB9306TU variant.
Technical Context
The TC7SPB9306TU implements a single n-channel MOSFET-based pass-gate switch with independent VCCA and VCCB supplies, supporting asymmetric voltage translation without directionality constraints. Its active-high OE enables synchronous bus isolation, and 5.5 V tolerance on OE allows direct interfacing with 5 V logic even when VCCA is as low as 1.65 V.
Level shifting relies on external pull-up resistors tied to either VCCA or VCCB; no internal biasing is used. The device exhibits <2.2 ns propagation delay (tPLH/tPHL) and <19 ns disable time (tPLZ) under 2.5 V/3.3 V operation, with input capacitance of 3 pF and ON-capacitance of 14 pF - critical for high-speed digital signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 1.65 V to 5.0 V - sets low-voltage domain (e.g., 1.8 V/2.5 V microcontroller I/O) |
| VCCB Range | 2.3 V to 5.5 V - supports higher-voltage peripherals (e.g., 3.3 V/5 V sensors or EEPROMs) |
| RON (typ.) | 5.0 Ω @ VCCA=3.0 V, VCCB=4.5 V - ensures minimal voltage drop and signal distortion at 30 mA load |
| OE Input Tolerance | 5.5 V - permits direct connection to 5 V logic without level-shifting circuitry |
| Propagation Delay | 0.45–2.2 ns - defines maximum data rate capability in high-speed digital interconnects |
| Operating Temp | −40 °C to +85 °C - qualifies for industrial-grade embedded systems deployment |
| Input Capacitance | 3 pF - limits loading on driving source, preserving rise/fall times in fast-switching applications |
Pinout & Package
TC7SPB9306TU is housed in a 6-pin Ultra-thin Fine-pitch (UF6) package measuring 1.6 × 1.6 × 0.55 mm with 0.5 mm pitch, optimized for space-constrained portable and IoT designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Low-voltage-side data terminal | Connects to VCCA-referenced logic (e.g., 1.8 V MCU GPIO); bidirectional signal path |
| B | High-voltage-side data terminal | Connects to VCCB-referenced peripheral (e.g., 5 V sensor output); bidirectional signal path |
| OE | Active-high output enable | High = switch ON (A↔B conductive); Low = switch OFF (high-impedance isolation) |
| VCCA | Low-voltage supply pin | Must be ≤ VCCB; powers internal logic and A-side interface circuitry |
| VCCB | High-voltage supply pin | Must be ≥ VCCA; powers B-side interface and level-shift path |
| GND | Common reference ground | Single shared ground for both domains; required for proper ESD and leakage control |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional level translation | Supports 1.65–5.0 V ↔ 2.3–5.5 V translation without direction control pins or internal direction logic |
| 5.5 V-tolerant OE input | Enables direct interface with legacy 5 V controllers while VCCA operates at 1.8 V, eliminating external level shifters |
| Low ON-resistance (5.0 Ω typ.) | Minimizes voltage drop and signal attenuation across the switch, preserving logic thresholds in mixed-voltage buses |
| Power-down protection | Prevents back-powering and latch-up when OE is driven low during VCCA/VCCB power sequencing |
| ESD-protected inputs | Withstands ±2 kV HBM per JEDEC JS-001 - reduces need for external TVS in board-level ESD mitigation |
Applications
| I²C Bus Voltage Translation | SMBus Peripheral Bridging |
|---|---|
Use Scenario: Interfacing a 1.8 V microcontroller I²C master with a 3.3 V EEPROM slave in battery-powered wearables. IC Role / Device Role / Timing Role: Bidirectional level translator on SDA/SCL lines, maintaining I²C timing compliance with sub-2 ns propagation delay. Use Value: Eliminates need for discrete FET-based translators or dedicated I²C level shifters, reducing BOM count and PCB area by >40%. | Use Scenario: Connecting a 2.5 V baseband processor to a 5.0 V smart battery SMBus gauge in portable medical devices. IC Role / Device Role / Timing Role: Isolates and translates SMBus data/clock between domains using active-high OE synchronized to processor reset sequence. Use Value: Ensures reliable communication during power-up/down sequencing where VCCA and VCCB ramp independently. |
| GPIO Expansion Interface | Legacy Logic Integration |
Use Scenario: Extending 3.3 V FPGA GPIO to drive 5 V industrial sensors via multiplexed address/data bus. IC Role / Device Role / Timing Role: Single-bit bidirectional switch controlled by FPGA OE signal, enabling dynamic voltage-domain selection per channel. Use Value: Provides deterministic ON-resistance and low capacitance (<14 pF), preserving signal edge rates up to 100 MHz. | Use Scenario: Integrating 5 V legacy UART peripherals into a modern 1.8 V SoC platform in industrial gateways. IC Role / Device Role / Timing Role: Level-translating TX/RX lines with 5.5 V-tolerant OE allowing direct control from 5 V enable signals. Use Value: Avoids external voltage translators and simplifies layout by supporting asymmetric VCCA/VCCB without external bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1-bit dual-supply bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0101DCKR | Active-low OE; auto-direction sensing; 10 Ω RON (typ.); supports 1.2–3.6 V → 1.65–5.5 V | Requires no OE control signal but adds direction-sensing latency; not suitable for synchronous isolation control | Select when automatic direction detection is preferred over deterministic OE timing control |
| SN74AVC1T45DBVR | Direction pin (DIR) required; 3-state outputs; 5.5 V tolerant I/O; 6.5 Ω RON (typ.) | Unidirectional by default; requires external DIR logic for bidirectional use; higher pin count (6-pin SOT-23 vs. UF6) | Select when system already uses DIR-controlled interfaces or needs 3-state output capability |
Compared with TXS0101DCKR and SN74AVC1T45DBVR, the TC7SPB9306TU offers deterministic active-high OE timing, lowest ON-resistance in its class, and smallest footprint (UF6), making it optimal for space- and timing-critical bidirectional level translation where explicit control is required.
Availability
TC7SPB9306TU is available at Aetrix Electronics and suitable for I²C/SMBus voltage translation, GPIO expansion, legacy logic integration, and industrial sensor interfacing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TC7SPB9306TU 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor components for industrial, automotive, and consumer applications, with expertise in power management, logic ICs, and discrete devices.
The TC7SPB9306TU belongs to Toshiba's TC7SPB series of ultra-low-power dual-supply bus switches, engineered specifically for voltage-domain bridging in compact, battery-sensitive, and mixed-voltage embedded systems.
FAQ
What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of the TC7SPB9306TU?
The TC7SPB9306TU requires VCCA to be lower than VCCB per datasheet Note 1 in Section 10. Absolute maximum ratings allow VCCA and VCCB each up to 7.0 V, but operational specification mandates VCCA < VCCB. Valid combinations include 1.8 V/3.3 V, 2.5 V/5.0 V, and 3.3 V/5.0 V. Exceeding VCCA ≥ VCCB may cause undefined switching behavior or increased leakage in the TC7SPB9306TU.
Does the TC7SPB9306TU support true bidirectional signal flow without external components?
Yes, the TC7SPB9306TU supports true bidirectional signal flow through its single n-MOSFET pass gate. However, level-shifting functionality requires external pull-up resistors on A and/or B lines tied to their respective supplies (VCCA or VCCB). No direction control pin or internal biasing is needed - the TC7SPB9306TU inherently passes signals in both directions when enabled.
Can the TC7SPB9306TU be used with VCCA = 1.65 V and VCCB = 2.3 V?
Yes, the TC7SPB9306TU is fully specified for VCCA = 1.65 V to 5.0 V and VCCB = 2.3 V to 5.5 V, including the 1.65 V/2.3 V combination. DC characteristics such as VIH/VIL thresholds, RON, and leakage remain within spec at these voltages, and the device maintains −40 °C to +85 °C operation - confirmed in Section 10 and 12.1 of the TC7SPB9306TU datasheet.
Is the TC7SPB9306TU pin-compatible with the TC7SPB9307TU?
No, the TC7SPB9306TU and TC7SPB9307TU share identical pinout and package (UF6), but differ in OE polarity: TC7SPB9306TU has active-high OE, while TC7SPB9307TU has active-low OE. They are functionally interchangeable only if OE control logic is inverted; PCB layout is identical, but firmware/hardware OE drive must match the selected variant. This distinction is explicitly defined in Section 2 and Table 8 of the TC7SPB9306TU/TC7SPB9307TU datasheet.
What is the recommended pull-up resistor value for level-shifting applications using the TC7SPB9306TU?
Toshiba does not specify a single recommended pull-up value, but typical designs use 2.2 kΩ to 10 kΩ resistors, selected based on bus capacitance, speed requirements, and sink current capability. For I²C at 400 kHz with 30 pF bus load, 4.7 kΩ is commonly used. The TC7SPB9306TU datasheet Fig. 15.1–15.4 shows functional behavior across multiple values - actual selection must balance rise time, power, and noise immunity for the target application.
TC7SPB9306TU,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TC7SP
- Package/Case:
- 6-SMD, Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Dual Supply
- Voltage - Supply:
- 1.65V ~ 5V, 2.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UF6
TC7SPB9306TU,LF FAQ
1.How can I place an order for TC7SPB9306TU,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for TC7SPB9306TU,LF 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 TC7SPB9306TU,LF reliable?
The price and inventory of TC7SPB9306TU,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7SPB9306TU,LF is usually 5 days.
3.What payment methods are accepted for TC7SPB9306TU,LF?
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TC7SPB9306TU,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC7SPB9306TU,LF 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 TC7SPB9306TU,LF?
For technical support, including TC7SPB9306TU,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7SPB9306TU,LF requirements.
6.How does Aetrix verify that TC7SPB9306TU,LF is sourced from the original manufacturer or authorized distributors?
All TC7SPB9306TU,LF 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 TC7SPB9306TU,LF meets industry standards.
7.What is the process for return or replacement of TC7SPB9306TU,LF?
All TC7SPB9306TU,LF units undergo pre-shipment inspection (PSI). If there is an issue with TC7SPB9306TU,LF, 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 TC7SPB9306TU,LF part is unused and in its original packaging.
Return procedure for TC7SPB9306TU,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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