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Toshiba Semiconductor and Storage TC74VCX245FK(EL)
- Part No.:
- TC74VCX245FK(EL)
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 20-VFSOP (0.118", 3.00mm Width)
- Datasheet:
-
TC74VCX245FK(EL).pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,864
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Product details
Overview
TC74VCX245FK(EL) from Toshiba Electronic Devices & Storage Corporation is a low-voltage CMOS octal bus transceiver supporting bidirectional data flow between 1.2 V–3.6 V domains, with 3.6 V tolerant I/O, propagation delay as low as 3.5 ns (VCC = 3.0–3.6 V), and ±24 mA output drive at 3.0 V - used in voltage-level translation between 2.5 V and 3.3 V subsystems in industrial control backplanes.
For engineers reviewing the TC74VCX245FK(EL) datasheet, TC74VCX245FK(EL) pinout, TC74VCX245FK(EL) application, or TC74VCX245FK(EL) equivalent, this page delivers verified electrical specs, truth-table–aligned direction control behavior, US20 package mechanical data, and validated alternatives for mixed-voltage bus interfacing.
Technical Context
The TC74VCX245FK(EL) implements dual-bus bidirectional translation via DIR-controlled signal path selection and OE-gated 3-state output enable/disable. Its overvoltage-tolerant I/O structure allows safe connection to 3.6 V signals while operating from as low as 1.2 V VCC, enabling interoperability across legacy and low-power logic families.
Propagation delay varies with supply voltage: 42.0 ns max at 1.2 V, stepping down to 3.5 ns max at 3.3 V; output drive strength scales accordingly (±2 mA min at 1.4 V, ±24 mA min at 3.0 V), ensuring timing integrity and noise margin across its full 1.2–3.6 V operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.2 V to 3.6 V - supports direct integration into 1.5 V, 1.8 V, 2.5 V, and 3.3 V systems without level-shifting circuitry. |
| tpd (max) | 3.5 ns at VCC = 3.0–3.6 V - enables sub-300 MHz bus operation in high-speed digital interfaces. |
| IOL/IOH (min) | ±24 mA at VCC = 3.0 V - drives standard TTL loads and sustains signal integrity over 10 cm PCB traces. |
| VI/O Tolerance | −0.5 V to +4.6 V - permits hot-plug compatibility and safe interfacing with 3.3 V or 3.6 V buses while powered at lower VCC. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial ambient environments including factory automation controllers. |
| Input Capacitance | 6 pF (typ.) - minimizes loading on upstream drivers and preserves edge rate in dense bus layouts. |
Pinout & Package
TC74VCX245FK(EL) uses the US20 ultra-thin shrink small-outline package (SSOP), 20-pin, 0.65 mm pitch, 4.4 mm × 6.5 mm body, 0.03 g typical weight, with exposed pad not present - optimized for space-constrained industrial PCBs requiring thermal efficiency without thermal pad routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Bus A I/O port | Octal bidirectional data terminals connected to low-voltage domain (e.g., 1.8 V microcontroller bus). |
| B0–B7 | Bus B I/O port | Octal bidirectional data terminals connected to higher-voltage domain (e.g., 3.3 V peripheral bus). |
| DIR | Direction control input | High = A→B data flow; Low = B→A data flow - determines real-time signal path without latch or clock. |
| OE | Output enable input | Low = active transceiver; High = all A/B pins enter high-impedance state - enables bus isolation during power-down or arbitration. |
| VCC | Supply voltage | Single 1.2–3.6 V rail powers internal logic and I/O buffers - no separate I/O voltage required. |
| GND | Ground reference | Common return for logic and I/O - must be low-inductance connection to minimize ground bounce in fast switching. |
Key Features
| Feature | Design Value |
|---|---|
| 3.6 V tolerant I/O | Allows connection to 3.3 V or 3.6 V buses while operating from 1.2–2.5 V VCC - eliminates external level shifters in mixed-supply systems. |
| Voltage-scalable propagation delay | tpd tightens from 42 ns @ 1.2 V to 3.5 ns @ 3.3 V - maintains timing predictability across supply scaling without redesign. |
| Configurable bidirectional flow | DIR pin selects A→B or B→A path in real time - supports dynamic bus arbitration in master/slave or peer-to-peer protocols. |
| High-drive 3-state outputs | ±24 mA drive at 3.0 V with <0.4 V VOL - ensures clean logic thresholds even under capacitive loading up to 30 pF. |
| ESD-protected inputs | All inputs include built-in protection against ≥2 kV HBM - reduces need for external TVS diodes in industrial ESD environments. |
Applications
| Industrial PLC Backplane Interface | Low-Power FPGA I/O Translation |
|---|---|
|
Use Scenario: Interfacing a 1.8 V FPGA I/O bank to a 3.3 V sensor acquisition module in an automated test system. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing real-time analog-to-digital command/response traffic across supply domains. Use Value: Eliminates discrete level-shifter ICs and associated layout area; 3.5 ns tpd ensures setup/hold compliance at 100 MHz SPI-like transfers. |
Use Scenario: Connecting a 2.5 V microcontroller's parallel address/data bus to a 3.3 V legacy memory subsystem in a field-upgradable controller. IC Role / Device Role / Timing Role: Octal bus transceiver enabling synchronous read/write cycles with DIR-controlled direction and OE-based bus release. Use Value: ±24 mA drive sustains signal integrity across 8-inch PCB traces; 3.6 V I/O tolerance prevents damage during hot-swap of memory modules. |
| Automotive Body Control Module | Medical Diagnostic Equipment Data Bus |
|
Use Scenario: Isolating and translating between 1.2 V SoC debug interface and 3.3 V CAN transceiver diagnostics port in a vehicle ECU. IC Role / Device Role / Timing Role: Voltage-level translator with OE-controlled 3-state isolation during firmware update sequences. Use Value: −40 °C to +85 °C rating matches automotive under-hood requirements; 6 pF CIN minimizes jitter on JTAG/SWD clock lines. |
Use Scenario: Bridging a 1.5 V ASIC image processor bus to a 2.5 V display controller in portable ultrasound equipment. IC Role / Device Role / Timing Role: Low-power octal transceiver enabling burst-mode pixel data transfer with minimal supply current increase. Use Value: ICC < 750 µA at VCC = 1.2 V extends battery life; 1.2 V minimum operation supports next-gen ultra-low-power imaging pipelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Wider VCC range (1.65–3.6 V); no 1.2 V operation; 3.6 V I/O tolerance confirmed; tpd = 3.9 ns (max) at 3.3 V. | Not suitable for sub-1.65 V systems; requires minimum 1.65 V VCC - incompatible with 1.5 V or 1.2 V SoCs. | Select when design operates strictly ≥1.65 V and demands TI-qualified automotive-grade availability. |
| 74ALVC245MTCX | Same 1.2–3.6 V range; 3.6 V I/O tolerant; tpd = 3.8 ns (max) at 3.3 V; IOH/IOL = ±24 mA (min) at 3.0 V - functionally aligned. | US20-compatible footprint but different marking and traceability chain; RoHS/REACH documentation differs per manufacturer. | Valid drop-in alternative if sourcing flexibility is prioritized and Toshiba-specific qualification is not mandated. |
Compared with SN74LVC245APWR and 74ALVC245MTCX, TC74VCX245FK(EL) uniquely supports 1.2 V operation and delivers tighter 3.5 ns max tpd at 3.3 V, making it optimal for ultra-low-voltage embedded systems where both minimum supply and timing margin are critical.
Availability
TC74VCX245FK(EL) is available at Aetrix Electronics and suitable for industrial PLC backplanes, low-power FPGA I/O translation, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and multi-voltage domain designs.
Supply support for TC74VCX245FK(EL) 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 high-reliability semiconductor components for industrial, automotive, and computing applications, with emphasis on low-power logic, power management, and memory solutions.
The TC74VCX245FK(EL) belongs to Toshiba's VCX-series low-voltage CMOS logic family, engineered specifically for seamless voltage-domain bridging in resource-constrained embedded systems requiring wide VCC scalability and robust I/O tolerance.
FAQ
What is the minimum supply voltage supported by TC74VCX245FK(EL)?
The TC74VCX245FK(EL) operates down to 1.2 V VCC, with guaranteed functionality including propagation delay (42.0 ns max), output drive (±2 mA min), and input threshold levels across the full −40 °C to +85 °C range - enabling use in next-generation ultra-low-power microcontrollers and battery-operated sensors.
Does TC74VCX245FK(EL) support hot-swap between different voltage domains?
Yes, TC74VCX245FK(EL) supports hot-swap due to its 3.6 V tolerant I/O pins - inputs and outputs withstand −0.5 V to +4.6 V regardless of VCC state, preventing latch-up or damage when connecting to live 3.3 V buses while the device is unpowered or at lower VCC.
How does the DIR pin control data flow direction in TC74VCX245FK(EL)?
In TC74VCX245FK(EL), DIR = L enables B→A data transmission; DIR = H enables A→B transmission - this is a combinatorial control with no internal latching, allowing real-time reversal of bus direction synchronized to system protocol timing without clocking overhead.
What is the maximum capacitive load TC74VCX245FK(EL) can drive while maintaining timing specs?
TC74VCX245FK(EL) is characterized with CL = 30 pF in AC testing; its ±24 mA drive capability at 3.0 V ensures tpd ≤ 3.5 ns and VOL ≤ 0.4 V under this load - exceeding 30 pF may degrade edge rate and increase propagation delay beyond spec limits.
Is TC74VCX245FK(EL) pin-compatible with other Toshiba VCX-series transceivers?
TC74VCX245FK(EL) uses the US20 package and shares identical pinout with TC74VCX245F and TC74VCX245FK variants - all feature A0–A7, B0–B7, DIR, OE, VCC, and GND in the same physical arrangement, enabling direct substitution within the same VCX245 family.
TC74VCX245FK(EL) Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TC74VCX
- Package/Case:
- 20-VFSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VSSOP
TC74VCX245FK(EL) FAQ
1.How can I place an order for TC74VCX245FK(EL) through Aetrix?
Please submit a Request for Quotation (RFQ) for TC74VCX245FK(EL) 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 TC74VCX245FK(EL) reliable?
The price and inventory of TC74VCX245FK(EL) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC74VCX245FK(EL) is usually 5 days.
3.What payment methods are accepted for TC74VCX245FK(EL)?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC74VCX245FK(EL) transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC74VCX245FK(EL)?
TC74VCX245FK(EL) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC74VCX245FK(EL) 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 TC74VCX245FK(EL)?
For technical support, including TC74VCX245FK(EL) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC74VCX245FK(EL) requirements.
6.How does Aetrix verify that TC74VCX245FK(EL) is sourced from the original manufacturer or authorized distributors?
All TC74VCX245FK(EL) 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 TC74VCX245FK(EL) meets industry standards.
7.What is the process for return or replacement of TC74VCX245FK(EL)?
All TC74VCX245FK(EL) units undergo pre-shipment inspection (PSI). If there is an issue with TC74VCX245FK(EL), 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 TC74VCX245FK(EL) part is unused and in its original packaging.
Return procedure for TC74VCX245FK(EL):
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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