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Toshiba Semiconductor and Storage 74VHC245FT
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- Part No.:
- 74VHC245FT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHC245FT.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:17,686
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Product details
Overview
74VHC245FT from Toshiba Electronic Devices & Storage Corporation is an advanced high-speed CMOS octal bus transceiver in TSSOP20B package, supporting bidirectional asynchronous data transfer between two 8-bit buses with DIR-controlled direction and G-enabled isolation. It operates from 2.0 V to 5.5 V, delivers 4.0 ns typical propagation delay at 5.0 V, and maintains ≤4.0 µA max quiescent current at 25 °C - ideal for low-power industrial bus interface applications.
For engineers reviewing the 74VHC245FT datasheet, 74VHC245FT pinout, 74VHC245FT application, or 74VHC245FT equivalent, key selection criteria include its AEC-Q100 Rev. H qualification, -40 °C to +125 °C operating range, balanced tPLH/tPHL timing, 3-state output control, and compatibility with 74AC/HC/AHC245 logic families.
Technical Context
The 74VHC245FT implements dual 8-bit bidirectional bus interfaces controlled by a single DIR input to select data flow direction (A→B or B→A) and an active-low G enable to place both ports in high-impedance state. Its C2MOS silicon gate process enables TTL-compatible speed with CMOS power efficiency.
All inputs feature ESD protection; bus I/O terminals include parasitic diodes to VCC, prohibiting direct 5 V-to-3 V level translation without external clamping or voltage translation. Unused bus terminals must be pulled to VCC or GND to prevent floating states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports mixed-voltage system interfacing across 3.3 V and 5 V domains |
| Propagation Delay (tPLH/tPHL) | 4.0 ns (typ.) at VCC = 5.0 V - enables high-throughput data transfer in fast synchronous bus systems |
| Quiescent Supply Current (ICC) | 4.0 µA (max) at Ta = 25 °C - ensures ultra-low static power in battery-backed or energy-sensitive designs |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial control environments |
| AEC-Q100 Compliance | Rev. H qualified - meets automotive reliability stress test requirements for mission-critical ECUs |
| Input Noise Immunity | VNIH/VNIL ≥ 28 % VCC (min) - provides robust operation in electrically noisy industrial settings |
| Output Skew (tosLH/tosHL) | ≤15.8 ns (max) at VCC = 5.0 V - guarantees tight timing alignment across all eight data lines |
Pinout & Package
Package: TSSOP20B - 20-pin thin shrink small outline package (4.4 mm × 6.5 mm, 0.65 mm pitch), optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G (Pin 1) | Active-low Output Enable | Drives all A/B bus outputs into high-impedance when HIGH; required for bus isolation during arbitration |
| DIR (Pin 19) | Direction Control | LOW = A→B data flow; HIGH = B→A data flow - determines real-time bidirectional path |
| A0–A7 (Pins 2–9) | Port A Data I/O | 8-bit bidirectional bus port; connected to microcontroller or ASIC local bus |
| B0–B7 (Pins 11–18) | Port B Data I/O | 8-bit bidirectional bus port; interfaces to peripheral or memory subsystem |
| VCC (Pin 20) | Positive Supply | Single supply rail powering internal logic and output drivers; decoupling capacitor required |
| GND (Pin 10) | Ground Reference | Common return path for all signals and power; must be low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Pin- and function-compatible with 74AC/HC/AHC245 | Enables drop-in replacement in legacy designs without layout or firmware changes |
| Balanced propagation delays (tPLH ≈ tPHL) | Minimizes duty cycle distortion in clocked bus systems and simplifies timing closure |
| Low noise output (VOLP ≤ 1.0 V) | Reduces switching-induced ground bounce and crosstalk in dense digital layouts |
| High noise immunity (VNIH/VNIL ≥ 28 % VCC) | Prevents false triggering from EMI or signal reflections on long trace runs |
| 3-state output OFF-state leakage ≤ 0.55 µA | Ensures reliable bus contention avoidance and prevents unintended current paths |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Backplane Interface |
|---|---|
Use Scenario: Bidirectional data exchange between MCU and CAN/LIN transceiver cluster via shared 8-bit parallel bus. IC Role / Device Role / Timing Role: Octal bus transceiver managing isolated, direction-switched communication between processor and protocol ICs. Use Value: AEC-Q100 qualification and -40 °C to +125 °C operation ensure functional safety compliance in engine bay-mounted modules. | Use Scenario: Interfacing modular I/O cards to central controller over standardized backplane bus. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled buffer enabling hot-swap-capable slot communication. Use Value: Low ICC and high noise immunity maintain signal integrity across noisy factory-floor environments with multiple simultaneous card inserts. |
| Medical Diagnostic Imaging Subsystem | Test & Measurement Equipment Data Bus |
Use Scenario: Isolating FPGA-based image processing unit from sensor acquisition board using shared parallel bus. IC Role / Device Role / Timing Role: Direction-gated transceiver synchronizing burst-mode pixel data transfers while preventing bus contention. Use Value: 4.0 ns propagation delay and balanced tPLH/tPHL support precise timing alignment for real-time frame capture. | Use Scenario: Connecting microcontroller to multiple ADC/DAC daughterboards via multiplexed 8-bit data path. IC Role / Device Role / Timing Role: Bidirectional bus repeater enabling flexible channel routing and dynamic device addressing. Use Value: TSSOP20B package and 0.65 mm pitch allow compact, high-channel-count instrument design with minimal board area. |
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 | Lower VCC range (1.65–3.6 V); 3.3 V only; no AEC-Q100 qualification | Suitable for consumer-grade 3.3 V systems but not automotive or extended-temp industrial use | Select when cost and 3.3 V operation are primary; avoid where 5 V tolerance or AEC-Q100 is required |
| 74HC245D,653 | Slower propagation delay (21 ns typ. at 4.5 V); wider temp range (-40 to +125 °C) but no AEC-Q100 certification | Acceptable for non-automotive industrial control where timing margin is relaxed | Choose for legacy HC-family compatibility where speed is secondary to broad vendor availability |
Compared with SN74LVC245APWR and 74HC245D,653, the 74VHC245FT uniquely combines 5 V tolerance, AEC-Q100 Rev. H qualification, and 4.0 ns speed - making it the only option for automotive-grade, mixed-voltage, high-speed bus bridging.
Availability
74VHC245FT is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC backplanes, medical imaging subsystems, and test equipment data buses requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74VHC245FT 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 automotive, industrial, and computing applications, with emphasis on quality, longevity, and regulatory compliance.
The 74VHC245FT belongs to Toshiba's VHC-series advanced CMOS logic family, engineered specifically for high-speed, low-power bidirectional bus interfacing in harsh-environment applications demanding AEC-Q100 qualification and wide VCC tolerance.
FAQ
What is the maximum operating temperature for the 74VHC245FT?
The 74VHC245FT is rated for continuous operation from -40 °C to +125 °C, validated per AEC-Q100 Rev. H thermal stress testing. This makes the 74VHC245FT suitable for under-hood automotive applications and high-temperature industrial enclosures where ambient heat exceeds standard commercial grade limits.
Does the 74VHC245FT support 5 V to 3.3 V level translation?
No, the 74VHC245FT does not support direct 5 V to 3.3 V level translation. Its bus I/O terminals contain parasitic diodes to VCC, so applying 5 V to a port powered at 3.3 V risks forward-biasing those diodes and causing excessive current. The 74VHC245FT requires matched VCC on both sides or external level-shifting circuitry when interfacing mismatched voltage domains.
What is the typical propagation delay of the 74VHC245FT at 3.3 V supply?
At VCC = 3.3 V and Ta = 25 °C, the 74VHC245FT exhibits a typical propagation delay (tPLH/tPHL) of 5.8 ns, as specified in Section 11.4 of the official Toshiba datasheet. This value increases to 8.3 ns maximum under worst-case conditions (Ta = -40 to +125 °C, CL = 50 pF), ensuring predictable timing margins in high-speed bus designs using the 74VHC245FT.
Is the 74VHC245FT pin-compatible with standard 74HC245 devices?
Yes, the 74VHC245FT is pin- and function-compatible with industry-standard 74AC/HC/AHC245 octal transceivers, including identical TSSOP20 pinout and truth table behavior. This allows direct substitution in existing layouts without PCB modification - provided the 74VHC245FT's higher speed and tighter noise margins align with system timing requirements.
What packaging format is used for the 74VHC245FT?
The 74VHC245FT is supplied in the TSSOP20B package: a 20-pin thin shrink small outline package measuring 4.4 mm × 6.5 mm with 0.65 mm lead pitch. This RoHS-compliant, surface-mount package supports high-density routing and automated reflow assembly, and is explicitly confirmed in Toshiba's official documentation for the 74VHC245FT.
74VHC245FT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- 74VHC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74VHC245FT FAQ
1.How can I place an order for 74VHC245FT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHC245FT 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 74VHC245FT reliable?
The price and inventory of 74VHC245FT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC245FT is usually 5 days.
3.What payment methods are accepted for 74VHC245FT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC245FT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHC245FT?
74VHC245FT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHC245FT 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 74VHC245FT?
For technical support, including 74VHC245FT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC245FT requirements.
6.How does Aetrix verify that 74VHC245FT is sourced from the original manufacturer or authorized distributors?
All 74VHC245FT 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 74VHC245FT meets industry standards.
7.What is the process for return or replacement of 74VHC245FT?
All 74VHC245FT units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC245FT, 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 74VHC245FT part is unused and in its original packaging.
Return procedure for 74VHC245FT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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