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Toshiba Semiconductor and Storage 74VHC240FT
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- Part No.:
- 74VHC240FT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHC240FT.pdf
- Description:
- IC BUFFER INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,218
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Product details
Overview
74VHC240FT from Toshiba Electronic Devices & Storage Corporation is an octal inverting 3-state buffer IC with two active-low output enables, designed for bidirectional bus interfacing in memory address/data paths. It operates across 2.0–5.5 V supply, delivers 3.9 ns typical propagation delay at 5 V, and supports -40°C to +125°C industrial/automotive environments - used in automotive body control modules requiring level-shifting between 3.3 V microcontrollers and 5 V legacy peripherals.
For engineers reviewing the 74VHC240FT datasheet, 74VHC240FT pinout, 74VHC240FT application, or 74VHC240FT equivalent, key selection criteria include its AEC-Q100 qualification, balanced tPLH/tPHL timing, high-noise-immunity inputs (28% VCC), and TSSOP20B package compatibility with space-constrained PCB layouts in automotive and industrial control systems.
Technical Context
The 74VHC240FT implements eight independent inverting buffer channels, each with tri-state control via dual active-low OE pins (OE1̅, OE2̅) enabling group-wise output disable. Its C2MOS silicon gate process ensures TTL-compatible speed with CMOS power efficiency - tPLH/tPHL match within ±0.2 ns at 5 V, supporting deterministic timing in synchronous bus architectures.
Input protection circuitry allows safe 0–5.5 V input voltage regardless of VCC, enabling robust 5 V ↔ 3.3 V level translation without external clamping. The device features power-down input protection and low dynamic noise (VOLP ≤ 0.8 V), critical for mixed-voltage systems where signal integrity must be maintained during hot-swap or partial-power-down events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Inverting octal 3-state buffer with dual active-low output enables (OE1̅, OE2̅) |
| Supply Voltage Range | 2.0 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V systems |
| Propagation Delay | 3.9 ns (typ.) at VCC = 5 V, CL = 50 pF - enables >100 MHz bus clocking in buffered address paths |
| Quiescent Current | 4.0 µA (max) at TA = 25°C - minimizes standby power in always-on automotive modules |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 Rev. H for under-hood automotive applications |
| Input Noise Immunity | 28% VCC (min) - rejects >1.4 V noise on 5 V buses without false triggering |
| Output Drive | ±8 mA at VCC = 4.5 V - drives 50 pF loads with <10.5 ns max delay over full temperature range |
Pinout & Package
TSSOP20B (0.65 mm pitch, 6.5 mm × 4.4 mm footprint), 20-pin thin shrink small outline package with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1̅ / OE2̅ | Active-low output enable for first/second group of four buffers - simultaneous control of channel subsets |
| 2–5, 13–16 | A1–A4 / B1–B4 | Inverting input terminals - accept 0–5.5 V logic regardless of VCC for mixed-voltage interfacing |
| 6–9, 11–14 | Y1–Y4 / Y5–Y8 | Inverting 3-state outputs - high-impedance state when corresponding OE̅ is high |
| 10 | GND | Ground reference for all I/O and internal logic - requires low-inductance connection to minimize switching noise |
| 20 | VCC | Positive supply (2.0–5.5 V) - decoupling capacitor (100 nF) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Rev. H qualification | Validated reliability for automotive electronics including temperature cycling, HTOL, and ESD testing |
| Wide VCC range (2.0–5.5 V) | Eliminates need for level shifters when interfacing 3.3 V MCUs with 5 V peripherals |
| Balanced tPLH ≈ tPHL | Ensures symmetrical rise/fall timing for clean clock-domain crossing in address latching |
| Input protection to 5.5 V | Prevents latch-up or damage when hot-plugging into powered-backup systems or battery-backed circuits |
| Low dynamic noise (VOLP ≤ 0.8 V) | Maintains signal integrity on shared PCB traces in noise-sensitive sensor interface subsystems |
Applications
| Automotive Body Control Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Buffering and isolating MCU GPIO lines driving multiple 5 V solenoid drivers while sharing a common data bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing direction-controlled data isolation and voltage translation between 3.3 V MCU and 5 V actuator interface. Use Value: Enables single-bus architecture with OE-controlled channel grouping, reducing PCB layer count and eliminating discrete level-shifters. | Use Scenario: Isolating field-side digital inputs from controller-side logic in modular I/O racks with hot-swap capability. IC Role / Device Role / Timing Role: Octal buffer with power-down input protection, allowing safe insertion/removal while backplane remains live. Use Value: Prevents system lockup during maintenance by maintaining high-impedance outputs and tolerating floating inputs up to 5.5 V. |
| Medical Diagnostic Equipment | Test & Measurement Instrumentation |
Use Scenario: Level-shifting and buffering serial control signals between isolated 3.3 V FPGA and 5 V analog front-end ASICs in MRI subsystems. IC Role / Device Role / Timing Role: Inverting buffer ensuring precise timing alignment of configuration commands with sub-ns skew tolerance. Use Value: Balanced propagation delays (tPLH ≈ tPHL) guarantee deterministic setup/hold margins for high-speed register programming. | Use Scenario: Driving multiple 50 Ω transmission lines from a single 3.3 V pattern generator output in automated test equipment. IC Role / Device Role / Timing Role: High-speed octal buffer delivering matched edge rates and low output skew across all eight channels. Use Value: Output skew ≤ 10.5 ns (max) ensures synchronized stimulus delivery to DUTs with tight timing correlation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | Lower VCC range (1.65–3.6 V), no AEC-Q100 qualification, 3.7 ns tPD at 3.3 V | Restricted to 3.3 V-only systems; unsuitable for 5 V buses or automotive under-hood use | Select only for cost-sensitive consumer-grade 3.3 V designs where extended temperature and automotive qualification are unnecessary |
| 74AHC240PW | Higher drive strength (±8 mA at 2.5 V), same 2.0–5.5 V range, but not AEC-Q100 qualified | Lacks automotive reliability validation; higher ICC (20 µA max) increases standby power | Prefer for industrial automation where extended temp is needed but AEC-Q100 is not mandated |
Compared with SN74LVC240APWR and 74AHC240PW, the 74VHC240FT uniquely combines AEC-Q100 qualification, 5.5 V tolerant inputs, and ultra-low ICC (4.0 µA) - making it the sole choice for automotive body electronics requiring both robustness and low quiescent power.
Availability
74VHC240FT is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC I/O modules, medical diagnostic equipment, and test & measurement instrumentation requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for 74VHC240FT 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 solutions for automotive, industrial, and computing markets, with emphasis on AEC-Q100-qualified logic and power devices.
The 74VHC240FT belongs to Toshiba's VHC-series advanced CMOS logic family, engineered specifically for noise-immune, low-power bus interfacing in harsh-environment applications demanding wide voltage range and automotive-grade reliability.
FAQ
What is the maximum operating temperature for the 74VHC240FT?
The 74VHC240FT is rated for continuous operation from -40°C to +125°C and is AEC-Q100 Rev. H qualified, confirming its suitability for under-hood automotive applications where ambient temperatures exceed 105°C. This rating is validated across all electrical parameters including propagation delay, output drive, and leakage current.
Does the 74VHC240FT support 5 V to 3.3 V level translation?
Yes, the 74VHC240FT supports bidirectional level translation: its inputs tolerate 0–5.5 V regardless of VCC, and outputs swing rail-to-rail (0 V to VCC). When powered at 3.3 V, it accepts 5 V inputs safely and drives 3.3 V logic levels - enabling direct interface between legacy 5 V peripherals and modern 3.3 V microcontrollers without external components.
What is the purpose of the two active-low output enables on the 74VHC240FT?
The 74VHC240FT features two independent active-low output enables (OE1̅ and OE2̅) that control separate groups of four buffers each. This allows selective tri-stating of half the bus - for example, enabling only address lines A0–A3 while holding A4–A7 in high-Z during multiplexed memory access - improving signal integrity and reducing bus contention in complex address/data routing.
Is the 74VHC240FT pin-compatible with standard 74-series 240 devices?
Yes, the 74VHC240FT is pin- and function-compatible with industry-standard 74AC/74HC/74AHC/LV 240-type octal inverting buffers in TSSOP20B packaging. Its pin assignment matches JEDEC MS-013AC, allowing drop-in replacement in existing designs - provided VCC and temperature requirements align with the VHC series' 2.0–5.5 V and -40°C to +125°C specifications.
What is the typical propagation delay of the 74VHC240FT at 3.3 V supply?
At VCC = 3.3 V and CL = 50 pF, the 74VHC240FT exhibits a typical propagation delay of 5.3 ns (tPLH/tPHL), with a maximum of 7.5 ns over the full -40°C to +125°C range. This performance enables reliable operation in 100+ MHz digital systems where predictable timing margins are essential for synchronous bus handshaking.
74VHC240FT 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:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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
74VHC240FT FAQ
1.How can I place an order for 74VHC240FT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHC240FT 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 74VHC240FT reliable?
The price and inventory of 74VHC240FT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC240FT is usually 5 days.
3.What payment methods are accepted for 74VHC240FT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC240FT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHC240FT?
74VHC240FT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHC240FT 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 74VHC240FT?
For technical support, including 74VHC240FT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC240FT requirements.
6.How does Aetrix verify that 74VHC240FT is sourced from the original manufacturer or authorized distributors?
All 74VHC240FT 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 74VHC240FT meets industry standards.
7.What is the process for return or replacement of 74VHC240FT?
All 74VHC240FT units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC240FT, 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 74VHC240FT part is unused and in its original packaging.
Return procedure for 74VHC240FT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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