My Inquiry
My Account
Toshiba Semiconductor and Storage 74VHCT244AFT
.jpg)
- Part No.:
- 74VHCT244AFT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHCT244AFT.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:24,884
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74VHCT244AFT from Toshiba Electronic Devices & Storage Corporation is a non-inverting octal 3-state bus buffer with two active-low output enables, designed for bidirectional data bus interfacing in 5 V TTL-compatible systems. It delivers 6.1 ns typical propagation delay at 5.0 V, supports -40°C to +125°C operation, and features TTL-input compatibility (VIH ≥ 2.0 V, VIL ≤ 0.8 V) for seamless integration with legacy logic.
For engineers reviewing the 74VHCT244AFT datasheet, 74VHCT244AFT pinout, 74VHCT244AFT application, or 74VHCT244AFT equivalent, this device serves as a high-speed, low-power level-shifting buffer for memory address/data buses, microcontroller I/O expansion, and industrial control backplanes requiring AEC-Q100-compliant timing integrity and robust 0–5.5 V input/output tolerance.
Technical Context
The 74VHCT244AFT implements dual independent 4-bit non-inverting buffers, each controlled by its own active-low output enable (OE1̅, OE2̅), enabling selective tri-state control of two 4-bit data lanes. Its C2MOS silicon gate process ensures balanced tPLH ≈ tPHL propagation delays and low dynamic noise (VOLP ≤ 1.0 V).
It operates across 4.5–5.5 V supply range with ±20 mA output drive capability, supports hot insertion via 0–5.5 V tolerant inputs/outputs (even when powered down), and includes power-down protection on all pins-critical for battery-backed or mixed-voltage system interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Non-inverting octal buffer with dual active-low 3-state enables (OE1̅, OE2̅) |
| Propagation Delay | 6.1 ns typ. at VCC = 5.0 V, CL = 50 pF - enables >160 MHz bus toggle rates |
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V TTL and mixed 3.3/5 V interface rails |
| Input Compatibility | TTL-level: VIH ≥ 2.0 V, VIL ≤ 0.8 V - directly drives and accepts 74LS/74ALS outputs |
| Output Drive | ±8 mA at VOL ≤ 0.5 V / VOH ≥ 3.94 V - sufficient for driving 10 LSTTL loads or 50 Ω transmission lines |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 Rev. H for automotive under-hood use |
| Quiescent Current | 4.0 µA max at TA = 25°C - enables ultra-low standby power in always-on control modules |
Pinout & Package
Package: TSSOP20B (0.65 mm pitch, 6.5 × 4.4 × 1.2 mm, 0.071 g typical). Lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1̅, OE2̅ | Active-low output enable controls first/second 4-bit buffer group independently |
| 2–5, 13–16 | A1–A4, B1–B4 | Non-inverting input terminals for each buffer channel |
| 6–9, 11–14 | Y1–Y4, Y5–Y8 | Buffered non-inverting outputs; high-impedance when corresponding OE̅ = HIGH |
| 10, 20 | GND, VCC | Ground reference and 4.5–5.5 V supply pins - decoupling capacitor required at VCC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Rev. H qualified | Validated for automotive applications including engine control and body electronics |
| 0–5.5 V input/output tolerance | Prevents latch-up during hot insertion or supply sequencing mismatches (e.g., battery backup) |
| Balanced tPLH/tPHL | Minimizes skew between rising/falling edges - critical for synchronous bus timing margins |
| Low dynamic noise (VOLP ≤ 1.0 V) | Reduces crosstalk in dense PCB layouts with shared ground planes or adjacent signal traces |
| Pin/function compatible with 74ACT/HCT/AHCT244 | Enables drop-in replacement in existing designs without layout or firmware changes |
Applications
| Automotive Body Control Module | Industrial PLC Backplane Interface |
|---|---|
Use Scenario: Isolating and buffering CAN/LIN microcontroller GPIOs driving relays, LEDs, and sensor inputs in harsh vehicle environments. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing level-shifted, noise-immune signal routing between MCU and peripheral drivers. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure reliable bus isolation under thermal stress and EMI exposure. |
Use Scenario: Expanding I/O capacity of programmable logic controllers using parallel address/data buses between CPU and I/O modules. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling time-multiplexed read/write cycles with precise 3-state control timing. Use Value: 6.1 ns propagation delay and balanced edge timing maintain setup/hold margins across multi-slot backplanes. |
| Medical Diagnostic Equipment Data Bus | Test & Measurement Instrumentation |
Use Scenario: Interfacing FPGA-based acquisition logic with analog front-end ADC/DAC modules operating at 5 V logic levels. IC Role / Device Role / Timing Role: Level-translating buffer isolating sensitive analog sections from digital switching noise on shared PCBs. Use Value: 0–5.5 V tolerant I/O and low VOLP suppress ground bounce that could corrupt high-resolution ADC sampling. |
Use Scenario: Driving multiple DUT (device-under-test) inputs simultaneously from a pattern generator in automated test systems. IC Role / Device Role / Timing Role: Synchronized fan-out buffer ensuring matched edge timing across 8 parallel test signals. Use Value: Output skew ≤ 8.8 ns guarantees sub-10 ns inter-channel timing alignment for high-speed digital stimulus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-inverting octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74VHCT244APW | Same logic function and TSSOP-20 package; TI version with identical AC/DC specs but different AEC-Q100 documentation path | Approved for TI-specific automotive programs; may require separate qualification if used in Toshiba-certified platforms | Select when sourcing from TI-authorized channels or aligning with TI-based reference designs |
| 74LVC244APW | Lower voltage: 1.65–3.6 V operation only; no 5 V tolerance - requires level-shifter for 5 V systems | Not suitable for direct 5 V TTL interface; limited to 3.3 V-only domains or with external translation | Choose only for new 3.3 V designs where power efficiency outweighs 5 V compatibility needs |
Compared with SN74VHCT244APW, the 74VHCT244AFT offers identical functional and timing behavior but distinct AEC-Q100 certification traceability; versus 74LVC244APW, it provides native 5 V interoperability and higher noise immunity at the cost of higher static current.
Availability
74VHCT244AFT is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical instrumentation, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74VHCT244AFT 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 consumer applications, with emphasis on AEC-Q100-qualified logic and power devices.
The 74VHCT244AFT belongs to Toshiba's VHCT family of advanced CMOS buffers, engineered specifically for high-speed, low-noise 5 V bus interfacing in thermally demanding and safety-critical systems.
FAQ
What is the maximum operating temperature range for the 74VHCT244AFT?
The 74VHCT244AFT is rated for continuous operation from -40°C to +125°C and is AEC-Q100 Rev. H qualified, making it suitable for under-hood automotive applications and industrial environments with extreme thermal cycling. This rating is verified across all DC and AC electrical characteristics in the official Toshiba datasheet Rev. 4.0.B.
Does the 74VHCT244AFT support 3.3 V to 5 V level shifting?
Yes, the 74VHCT244AFT supports bidirectional level shifting between 3.3 V and 5 V domains. Its TTL-compatible inputs accept 3.3 V logic highs (VIH ≥ 2.0 V), and its 5 V-supplied outputs drive 3.3 V-tolerant inputs safely due to 0–5.5 V I/O tolerance - no external resistors or translators needed when interfacing with 3.3 V FPGAs or microcontrollers.
What is the pin configuration difference between 74VHCT244AFT and 74VHCT240AFT?
The 74VHCT244AFT is non-inverting, while the 74VHCT240AFT is inverting - otherwise, both share identical pinout, package (TSSOP20B), supply requirements, and 3-state control architecture. Pin functions (OE1̅, OE2̅, A/B inputs, Y outputs) match exactly; only the logic polarity of the buffer stage differs, confirmed in Toshiba's Functional Description section.
Can the 74VHCT244AFT be used with a 4.5 V supply?
Yes, the 74VHCT244AFT is fully specified for operation at 4.5 V minimum supply voltage. All key parameters - including VOH ≥ 4.4 V (min), VOL ≤ 0.5 V (max), and propagation delay ≤ 11.0 ns (max at -40°C to +125°C) - are guaranteed across the full 4.5–5.5 V range per Toshiba's Operating Ranges table.
Is the 74VHCT244AFT pin-compatible with older 74HCT244 devices?
Yes, the 74VHCT244AFT is pin- and function-compatible with industry-standard 74HCT244, 74ACT244, and 74AHCT244 devices in TSSOP-20 packages. Toshiba explicitly states "Pin and function compatible with the 74 series (ACT/HCT/AHCT etc.) 240/244 type" in its Features section, confirming mechanical and logical interchangeability.
74VHCT244AFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- 74VHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74VHCT244AFT FAQ
1.How can I place an order for 74VHCT244AFT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT244AFT 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 74VHCT244AFT reliable?
The price and inventory of 74VHCT244AFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT244AFT is usually 5 days.
3.What payment methods are accepted for 74VHCT244AFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT244AFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT244AFT?
74VHCT244AFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT244AFT 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 74VHCT244AFT?
For technical support, including 74VHCT244AFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT244AFT requirements.
6.How does Aetrix verify that 74VHCT244AFT is sourced from the original manufacturer or authorized distributors?
All 74VHCT244AFT 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 74VHCT244AFT meets industry standards.
7.What is the process for return or replacement of 74VHCT244AFT?
All 74VHCT244AFT units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT244AFT, 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 74VHCT244AFT part is unused and in its original packaging.
Return procedure for 74VHCT244AFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74VHCT244AFT Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
